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BRAKE CONTROL SYSTEM

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1. VDC TCS ABS Data monitor Monitor item Display content i Notes Error inspection Condition Reference value in checklist normal operation Longitudinal accelera Vehicle stopped ON BRC 81 Yaw Rate Side DECEL G SEN tion detected by Decel 7 7 Decel Sensor System G Sensor Vehicle running OFF Inspection When brake fluid level switch ON n FLUID LEV SW ON OFF status of 01 22 WARNING brake fluid level switch When brake fluid level switch LAMPS OFF OFF VDC FAIL SIG VDC fail VDC system TCS FAIL SIG Fail signal statue TCS fail ON TCS system ABS FAIL SIG g ABS fail ABS system EBD FAIL SIG EBD fail EBD system Note 1 Confirm tire pressure is normal Note 2 ON OFF timing of ABS warning lamp ON For approximately 2 seconds after ignition switch is turned ON or when a malfunction is detected OFF Approximately 2 seconds after ignition switch is turned ON when system is in normal operation and TCS VDC function is not activated Note 3 ON OFF timing of VDC OFF indicator lamp ON For approximately 2 seconds after ignition switch is turned ON or when a malfunction is detected and VDC OFF switch is ON OFF Approximately 2 seconds after ignition switch is turned ON when system is in normal operation And when VDC OFF switch is OFF Note 4 SLIP indicator lamp ON OFF timing ON For approximately 2 seconds after ignition switch is turned ON or when a malfunction is detected and TCS VDC function
2. 3 CHECK TIRES Check for inflation pressure wear and size of each tire Are tire pressure and size correct and is tire wear within specifications Yes GO TO 4 No Adjust tire pressure or replace tire s 4 CHECK WHEEL BEARINGS Check wheel bearing axial end play Refer to FAX 5 FRONT WHEEL BEARING or RAX 5 HEAR WHEEL BEARING OK or NG OK gt gt TO 5 NG gt gt Repair or replace as necessary Refer to FAX 5 FRONT WHEEL BEARING or RAX 5 REAR WHEEL BEARING 5 CHECK WIRING HARNESS FOR SHORT CIRCUIT Check resistance between wheel sensor harness connector termi nals and ground T S Continuity should not exist DISCONNECT OK or NG DAD OK gt gt GO TO 6 35 NG Repair the circuit WFIAO105E Revision January 2005 BRC 30 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS TCS ABS 6 CHECK WIRING HARNESS FOR OPEN CIRCUIT Check continuity between ABS actuator and electric unit control unit harness connector and wheel sensor harness connector ABS actuator and Wheel sensor electric unit control unit Continuity Connector terminal Wire color Connector terminal Wire color Front LH E125 22 G E18 1 G E125 7 R E18 2 R Front RH E125 24 B 117 1 125 9 117 2 Rear LH E125 11 P B123 1 P 125 26 L B123 2 L Rear RH E125 13 V B122 1 V E1
3. Inlet valve Return check valve Reservoir Reservoir Outlet solenoid Front LH Rear RH valve Outlet solenoid Rear LH Front RH valve caliper caliper caliper caliper WFIA0281E Revision January 2005 BRC 53 2004 Quest CAN COMMUNICATION VDC TCS ABS CAN COMMUNICATION PFP 23710 System Description 500367 Refer to LAN 6 CAN COMMUNICATION Revision January 2005 BRC 54 2004 Quest TROUBLE DIAGNOSIS VDC TCS ABS TROUBLE DIAGNOSIS PFP 00000 How to Perform Trouble Diagnoses for Quick and Accurate Repair EFS00s68 INTRODUCTION The ABS TCS VDC system has an electronic control unit to control major functions The control unit accepts input signals from sensors and controls actuator operation It is also important to check for con ventional problems such as air leaks in the booster or lines lack of brake fluid or other problems with the brake system It is much more difficult to diagnose a problem that occurs intermit tently rather than continuously Most intermittent problems are caused by poor electrical connections or faulty wiring In this case careful checking of suspicious circuits may help prevent the replace ment of good parts A visual check only may not find the cause of the problem so a road test should be performed Before undertaking actual checks take just a few minutes to talk with a customer who approaches with an ABS TCS VDC complaint The cust
4. 46 TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC Precautions for Supplemental Restraint System adi lc E 78 SRS AIR and SEAT BELT PRE TEN Wheel Sensor System Inspection 78 tbe tete tug 46 Engine System Inspection 79 Precautions for Brake System 46 ABS TCS VDC Control Unit Inspection 80 Precautions When Using CONSULT II 46 Steering Angle Sensor System Inspection 80 CHECK POINTS FOR USING CONSULT II 46 Yaw Rate Side Decel G Sensor System Inspection 81 Precautions for Brake Control 47 Solenoid and VDC Change Over Valve System Precautions for CAN System 47 INSPECTION 83 Wiring Diagrams and Trouble Diagnosis 48 Actuator Motor Motor Relay and Circuit Inspection 84 PREPARATION 1 trant tna 49 Stop Lamp Switch System Inspection 85 Special Service Tool 49 ABS TCS VDC Control Unit Power and Ground Commercial Service Tools 49 Systems INSPECTION 86 SYSTEM DESCRIPTION 50 Brake Fluid Level Switch System Inspection
5. 39 WORK FLOW eaten wank VER MURAT RAE ECT NEUE mE 12 ABS Warning Lamp Does Not Come On When Igni CLARIFY CONCERN ene 13 tion Switch Is Turned 2 ient 40 EXAMPLE OF DIAGNOSIS SHEET PEPPER E EI 13 ABS Warning Lamp Stays On When Ignition Switch ComponentParts and Harness Connector Location 14 SS TUES E 40 5 treni rtt eet 15 Vehicle Jerks During TCS Activation 41 Wiring Diagram TOS 4 16 WHEEL SENSORS 2 222 42 Basic INSPECTION 20 Removal and Installation 42 BRAKE FLUID LEVEL FLUID LEAK AND SENSOR ROTOR 43 BRAKE PAD INSPECTION 20 Removal and Installation 43 POWER SYSTEM TERMINAL LOOSENESS Revision January 2005 BRC 1 2004 Quest ACTUATOR AND ELECTRIC UNIT ASSEMBLY 44 REFERENCE VALUE FROM CONSULT I 66 Removal and Installation 44 CONSULT II Function 69 REMOVAL eec 44 CONSULT IIBASICOPERATIONPROCEDURE INSTALLATION 45 69 SELF DIAGNOSIS sapete 70 VDC TCS ABS DATA MONITOR 73 n ACTIVE TEST niente netu 75 PRECAUTIONS
6. Pedal operation Large stroke pedal operation Firm pedal TCS does not work drive wheels slip when accelerating ABS does not work wheels slip when braking Lack of sense of acceleration Engine conditions When starting After starting Road conditions Bumps potholes Low friction road 0 Snow C Gravel C Other Driving conditions Full acceleration High speed cornering Vehicle speed Greater than 10 km h 6 MPH L Vehicle speed 10 km h 6 MPH or less Vehicle is stopped Applying brake conditions Suddenly Gradually Other conditions Operation of electrical equipment Shift change Other descriptions Revision January 2005 BRC 13 WFIA0097E 2004 Quest TROUBLE DIAGNOSIS TCS ABS Component Parts and Harness Connector Location 500352 Rear wheel sensor RH IB ABS actuator and electric unit control unit Front wheel sensor RH 5 Rear wheel sensor LH Combination meter warning and indicator lamps Front wheel sensor LH Engine removed for clarity Rear wheel sensor RH Qi ABS actuator and electric Front wheel sensor RH 3 ABS Front wheel sensor LH WFIA0152E Revision January 2005 BRC 14
7. ABS Does Not Work 50035 CAUTION The ABS does not operate when the vehicle speed is 10 km h 6 MPH or less 1 CHECK WARNING LAMP ACTIVATION Turn ignition switch ON and check for warning lamp activation e Warning lamp should activate for approximately 1 second after turning the ignition switch ON OK or NG OK Carry out self diagnosis Refer to BRC 24 SELF DIAGNOSIS NG Go to BRC 40 ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On Pedal Vibration or ABS Operation Noise During ABS activation pedal vibration may be felt and a noise may heard This is normal and does not indi cate a malfunction 1 CHECK SYMPTOM 1 Apply brake 2 Start engine Does the symptom occur only when engine is started Yes Carry out self diagnosis Refer to BRC 24 SELF DIAGNOSIS No gt gt GO TO 2 2 RECHECK SYMPTOM Does the symptom occur only when electrical equipment switches such as headlamps are turned on Yes Check for radio antenna or related wiring that is routed too close to the ABS actuator and electric unit control unit and reroute as necessary No Go to BRC 37 ABS Works Frequently Revision January 2005 BRC 39 2004 Quest TROUBLE DIAGNOSES FOR SYMPTOMS TCS ABS ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On 1 CHECK ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT FUSES Check 40
8. Revision January 2005 BRC 92 2004 Quest TROUBLE DIAGNOSES FOR SYMPTOMS VDC TCS ABS Vehicle Jerks During TCS VDC Activation 500362 1 ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT SELF DIAGNOSIS Perform ABS actuator and electric unit control unit self diagnosis Are self diagnosis result items displayed Yes gt gt After checking and repairing the applicable item perform the ABS actuator and electric unit con trol unit self diagnosis again No gt gt 2 2 ENGINE SPEED SIGNAL INSPECTION Perform data monitor with CONSULT II for the ABS actuator and electric unit control unit 15 the engine speed at idle 400 rpm or higher Yes GO TO 4 No gt gt GO 3 3 ECM SELF DIAGNOSIS Perform ECM self diagnosis Are self diagnosis result items displayed Yes gt gt After checking and repairing the applicable item perform the ECM self diagnosis again No GO TO 4 4 TCM SELF DIAGNOSIS Perform TCM self diagnosis Are self diagnosis result items displayed Yes gt gt After checking and repairing the applicable item perform the ECM self diagnosis again No gt gt GO TO 5 5 CONNECTOR INSPECTION Disconnect the ABS actuator and electric unit control unit connector and the ECM connectors and check the terminals for deformation disconnection looseness or damage OK or NG OK GO TO 6 NG Repair or replace as necessary 6 CAN COMMUNICATION I
9. _ MONITOR Operation ON OFF MOTORRELAY OFF ACTUATOR RLY ON ABS actuator relay ON ON ABS motor relay ON OFF NOTE e f active test is performed with brake pedal depressed pedal EN stroke may change This is normal SFIA0593E Revision January 2005 BRC 76 2004 Quest TROUBLE DIAGNOSIS VDC TCS ABS e TEST IS STOPPED is displayed approximately 10 seconds after operation starts Revision January 2005 BRC 77 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS VDC TCS ABS TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS PFP 00000 Wheel Sensor System Inspection EFSQ036G INSPECTION PROCEDURE 1 CONNECTOR INSPECTION Disconnect the ABS actuator and electric unit connector E125 and wheel sensor of malfunctioning code Check the terminals for deformation disconnection looseness or damage OK or NG OK gt gt 2 gt gt Repair or replace as necessary 2 CHECK WHEEL SENSOR OUTPUT SIGNAL 1 Connect ABS active wheel sensor tester J 45741 to wheel sensor using appropriate adapter 2 on the ABS active wheel sensor tester power switch NOTE The green POWER indicator should illuminate If the POWER indicator does not illuminate replace the battery in the ABS active wheel sensor tester before proceeding 3 Spin the wheel of the vehicle by hand and observe the red SENSOR indicator on the ABS active wheel sensor tester The red SENSOR indicator should flash
10. 00 ABS actuator and electric Measured ABS actuator and electric OK or NG OK gt gt Perform self diagnosis again If the same results appear replace ABS actuator and electric unit control unit Refer to BRC 44 Removal and Installation NG Repair the circuit Stop Lamp Switch System Inspection EFS00860 INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK WFIA0107E Check self diagnosis results Self diagnosis results STOP LAMP SW Is the above displayed in the self diagnosis display items Yes gt gt GO TO 2 No gt gt INSPECTION END 2 CONNECTOR INSPECTION 1 Disconnect the ABS actuator and electric unit control unit connector E125 and stop lamp switch connec tor E38 2 Check the terminals for deformation disconnection looseness or damage OK or NG OK gt gt 3 gt gt Repair or replace as necessary Revision January 2005 BRC 34 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS TCS ABS 3 STOP LAMP SWITCH INSPECTION Turn the ignition switch ON and check the voltage between the ABS actuator and electric unit control unit connector E125 terminal 17 R G and ground p ABS actuator and electric 17 R G Ground unit control unit connector Brake pedal depressed Battery voltage 17 approx 12V Brake pedal not depressed Approx OK or NG OK gt gt Perform self diagnosis again If the
11. EC BRK SW sB GR G B R G SB ABS ACTU ATOR AND ELECTRIC ASCD BR N UNIT CONTROL UNIT REFER TO THE FOLLOWING FUSE BLOCK JUNCTION BOX J B WFWAO0041E Revision January 2005 BRC 60 2004 Quest TROUBLE DIAGNOSIS VDC TCS ABS BRC VDC 02 ABS ACTUATOR AND ABS TCS VDC ELECTRIC UNIT CONTROL CONTROL UNIT UNIT BR FL SW VDC OFF SB n se mp 10 Di wARN R W R L wi TOLT ILL RW SB R L VDC OFF BRAKE SWITCH FLUID LEVEL SWITCH E21 A re 4 N 6 a Edi 345 L Lll WFWA0042E BRC 61 2004 Quest Revision January 2005 TROUBLE DIAGNOSIS VDC TCS ABS BRC VDC 03 ABS YAW RATE SIDE DECEL G SENSOR dem gt ACTUATOR AND ELECTRIC UNIT CONTROL UNIT B125 B 1514 312 1 L B122 123 CN GR WFWAOO043E 2004 Quest BRC 62 Revision January 2005 TROUBLE DIAGNOSIS VDC TCS ABS ewe BRC VDC 04 BATTERY iG POWER 40A 40A 1 B Y Y SOLENOID VALVE BRC AND ELECTRIC UNIT CONTROL UNIT MOTOR MOT ACTR FLIN FLOUT FROUT RLIN RLOUT RRIN RR OUT SOL SOL SOL SOL SOL SOL SOL SOL GND A GND M HSV2 HSV1 USV2 USV1 SOLENOID VALVE WFWAO110E Revision January 2005 BRC 63
12. INSPECTION PROCEDURE 1 CHECK CONNECTOR 1 Turn ignition switch OFF disconnect the ABS actuator and electric unit control unit connector and check the terminal for deformation disconnection looseness and so on If there is a malfunction repair or replace the terminal 2 Reconnect connector to perform self diagnosis Is CAN COMM CIRCUIT displayed in the self diagnosis display items Yes gt gt Print out the self diagnosis results and refer to 6 CAN COMMUNICATION No gt gt Connector terminal connection is loose damaged open or shorted Component Inspection EFs0087U TCS OFF SWITCH e Check the continuity between terminals 1 and 2 wm 1 2 Continuity should exist when pushing the A switch TCS OFF switch connector Continuity should not exist when releasing the switch WFIA0157E Revision January 2005 BRC 36 2004 Quest TROUBLE DIAGNOSES FOR SYMPTOMS TCS ABS TROUBLE DIAGNOSES FOR SYMPTOMS 99999 ABS Works Frequently 1 CHECK WARNING LAMP ACTIVATION Make sure warning lamp remains off while driving OK or NG OK gt gt GO 2 NG Carry out self diagnosis Refer to BRC 24 SELF DIAGNOSIS 2 CHECK WHEEL SENSORS Check the following e Wheel sensor mounting for looseness e Wheel sensors for physical damage e Wheel sensor connectors for terminal damage or loose connections OK or NG OK gt
13. 8 The Active Test screen will be displayed so conduct the following test Solenoid Valve Operation Chart ABS solenoid valve ABS solenoid valve ACT Operation ACTUA ACTUA d DONN TOR FR RH SOL FR RH IN SOL OFF ON ON OFF OFF OFF FR RH ABS SOLE NOID ACT FR RH OUT SOL OFF OFF ON OFF OFF OFF FRLH SOL FR LH IN SOL OFF ON ON OFF OFF OFF FR LH ABS SOLE NOID ACT FR LH OUT SOL OFF OFF ON OFF OFF OFF RR RH SOL RR RH IN SOL OFF ON ON OFF OFF OFF RR RH ABS SOLE NOID ACT RR RH OUT SOL OFF OFF ON OFF OFF OFF RRLH SOL RR LH IN SOL OFF ON ON OFF OFF OFF RR LH ABS SOLE NOID ACT RR LH OUT SOL OFF OFF ON OFF OFF OFF RR RH IN SOL OFF ON ON OFF OFF OFF RR RH OUT SOL OFF OFF ON OFF OFF OFF REAR SOL RR LH IN SOL OFF ON ON OFF OFF OFF RR LH OUT SOL OFF OFF ON OFF OFF OFF ON for 1 to 2 seconds after the touch and then OFF NOTE e If active test is performed with brake pedal depressed pedal stroke may change This is normal e TEST IS STOPPED is displayed approximately 10 seconds after operation starts e After TEST IS STOPPED is displayed to perform test again repeat Step 6 ABS Motor Touch and OFF on the screen Check that ABS motor relay operates as shown in table below ABS MOTOR OFF _
14. 87 System Components 50 CAN Communication System Inspection 88 ABS FUNGON nit cete tremere 50 Component Inspection 88 EBD Function esee 50 VDC OFF SWITCH 22 88 TES bien tails eerte 51 TROUBLE DIAGNOSES FOR SYMPTOMS 89 VDC FUNCOM ci iei or rr Re DOE ER 51 ABS Works Frequently 89 Wheel Sensore 52 Unexpected Pedal Action 90 Fail Safe Function 52 Long Stopping Distance 91 ABS EBD SYSTEM 52 ABS Does Not Work 91 VDC TCS SYSTEM e 52 Pedal Vibration or ABS Operation Noise 91 Hydraulic Circuit Diagram 53 ABS Warning Lamp Does Not Come On When 9 CAN COMMUNICATION 4 4 54 tion Switch Is Turned 92 System Description esee 54 ABS Warning Lamp Stays On When Ignition Switch TROUBLE DIAGNOSIS 55 IS On 92 How to Perform Trouble Diagnoses for Quick and Vehicle Jerks During TCS VDC Activation 93 Accurate Repair 95 ON VEHICLE SERVICE 94 INTRODUCTION eene 55 Adjustment of Steering Angle Sensor Neut
15. Display content Data monitor Reference value in Note Error inspection Condition checklist normal operation A T shift position N or P posi ON i i tion SLCT LVR POSI PNP switch signal ON OFF condition A T shift position other than N and P positions BRC 88 CAN Commu 1st gear 1 nication System Inspec tion 2nd gear 2 GEAR A T gear position 3rd gear 3 4th gear 4 Vehicle stopped 0 km h MPH FR RH SENSOR FR LH SENSOR Almost in accor BRC 78 Wheel Sensor Wheel speed dance with speed RR RH SENSOR RR LH SENSOR Vehicle running Note 1 ometer display within 10 System Inspection Accelerator pedal not Open close condition depressed ignition switch is 096 BRC 88 CAN Commu ACCEL POS SIG of throttle valve linked ON hication System Inspec with accelerator pedal Depress accelerator pedal tion dom 010 100 ignition switch is ON With engine stopped 0 rpm ENGINE SPEED With engine running Engine running Almost in accor dance with tachometer display BRC 79 Engine System Inspection STR ANGLE SIG Steering angle detected by steering angle sensor Straight ahead Approx 0 deg Steering wheel turned 756 to 756 deg BRC 80 Steering Angle Sensor System Inspec tion YAW RATE SEN Yaw rate detected by yaw rate sensor Vehicle stopped Approx 0 d s V
16. REFER TO UNTERE POOK PG POwER DISTRIBUTION ESG MODULE ENGINE ROOM 80 E e GR R Y R Y EN STOP LAMP SWITCH DEPRESSED RELEASED R G To e RGE ji WARN LT STOP L EC BRK SW GR RIG ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT REFER TO THE FOLLOWING FUSE BLOCK SA JUNCTION BOX H S Ginn ian WFWA0047E Revision January 2005 BRC 16 2004 Quest TROUBLE DIAGNOSIS TCS ABS EIS BRC TCS 02 BATTERY e Ae POWER 40A 40A 07 B Y SOLENOID VALVE ACTUATOR AND ELECTRIC UNIT CONTROL BRC UNIT ABS TCS MOTOR MOT MOT SOL FLIN FLOUT FRIN FROUT RLIN RLOUT RRIN BATT SOL SOL SOL SOL SOL SOL SOL GND A TCS OFF SW B B SB R W E26 TO LT ILL gem SB DATA LINK CONNECTOR or PRESSED ON _ RELEASED rl rl TOLT ILL 11213141516 WFWAO100E Revision January 2005 BRC 17 2004 Quest TROUBLE DIAGNOSIS TCS ABS 5 03 mim DATA LINE ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT mil m m mmn m m Y NEXT TO LAN CAN PAGE n mm Qmm mm cmm APL 5 Ce spese sso HS SD w WFWA0049E Revision January 2005 BRC 18 2004 Quest TROUBLE DIAGNOSIS TCS ABS BRC TCS 04 cmm DATA LINE IGNITION SWITCH ON OR STAR
17. Repair or replace as necessary Revision January 2005 BRC 83 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS VDC TCS ABS 3 CHECKING SOLENOID POWER AND GROUND 1 Check voltage between ABS actuator and electric unit control unit connector E125 and ground A ABS actuator and electric Measured ABS actuator and electric unit control unit value unit control unit connector Ped connector E125 9 16 16 Y 12V WFIAO111E 2 Check resistance between ABS actuator and electric unit con trol unit connector E125 and body ground A i T S ABS actuator and electric Body Measured 4 unit control unit und value Q unit control unit connector connector E125 g 31 26 31 00 46 00 OK or NG OK gt gt Perform self diagnosis again If the same results appear replace ABS actuator and electric unit control unit Refer to BRC 97 Removal and Installation NG Repair the circuit Actuator Motor Motor Relay and Circuit Inspection EFSO06M INSPECTION PROCEDURE 1 CHECKING SELF DIAGNOSIS RESULTS WFIA0112E Check self diagnosis results Self diagnosis results PUMP MOTOR ACTR RELAY CIRCUIT Is the above displayed in the self diagnosis display items Yes gt gt GO TO 2 No gt gt INSPECTION END 2 CONNECTOR INSPECTION 1 Disconnect ABS act
18. control unit is dis V played SLCT LVR POSI T z Shift position judged by PNP switch signal Throttle valve open close status POS SIG x judged by CAN communication sig nal is displayed ENGINE SPEED 7 E Engine speed judged by CAN com rpm munication signal is displayed STR ANGLE SIG _ x Steering angle detected by steering deg angle sensor is displayed YAW RATE SEN M Yaw rate detected by yaw rate sen d s sor is displayed DECEL G SEN Y Longitudinal acceleration detected d s by decel G sensor is displayed SIDE G SENSOR 7 Transverse acceleration detected m s by side G sensor is displayed STOP LAMP SW y T Stop lamp switch ON OFF status ON OFF is displayed OFF SW 5 VDC OFF switch ON OFF status ON OFF is displayed ABS WARN LAMP ABS warning lamp ON OFF status ON OFF is displayed SLIP LAMP 7 SLIP indicator lamp sta ON OFF tus is displayed FR LH IN SOL T Front LH IN ABS solenoid ON OFF OFF status is displayed FR LH OUT SOL E Front LH OUT ABS solenoid ON ON OFF OFF status is displayed RR RH IN SOL _ T Rear RH IN ABS solenoid ON OFF OFF status is displayed RR RH OUT SOL gt Rear RH OUT ABS solenoid ON ON OFF OFF status is displayed FR RH IN SOL _ Front RH IN ABS solenoid ON ON OFF OFF status is displayed FR RH OUT SOL x Front RH OUT ABS solenoid ON ON OFF OFF status
19. electrical control units using CAN communication After the inspection clear all DTCs Refer to LAN 6 CAN COMMUNICATION OK or NG OK GO TO 4 NG Perform Basic Inspection Refer to BRC 20 Basic Inspection 4 CHECK WHEEL SENSORS Check the following e Wheel sensor mounting for looseness e Wheel sensors for physical damage e Wheel sensor connectors for terminal damage or loose connections OK or NG OK Check ABS actuator and electric unit control unit connector terminals for deformation discon nection looseness or damage Reconnect ABS actuator and electric unit control unit harness connector Then retest NG Repair or replace as necessary Revision January 2005 BRC 38 2004 Quest TROUBLE DIAGNOSES FOR SYMPTOMS TCS ABS Long Stopping Distance EFS00961 1 CHECK BASE BRAKING SYSTEM PERFORMANCE 1 Disable ABS by disconnecting ABS actuator and electric unit control unit connector 2 Drive vehicle and check brake operation NOTE Stopping distance may be longer than vehicles without ABS when road condition is slippery NOTE Driving the vehicle with the ABS actuator and electric unit control unit disconnected may induce DTCs electrical control units using CAN communication After the inspection clear all DTCs Refer to LAN 6 CAN COMMUNICATION OK or NG OK Go to BRC 37 ABS Works Frequently NG Perform Basic Inspection Refer to BRC 20 Basic Inspection
20. gt GO 3 gt gt Repair or replace as necessary CHECK FRONT AXLE Check front and rear axles for excessive looseness Refer to FAX 5 FRONT WHEEL BEARING or RAX 5 REAR WHEEL BEARING OK or NG OK GO TO 4 NG Repair as necessary 4 CHECK BRAKE FLUID PRESSURE Check brake fluid pressure distribution Refer to BR 14 Inspection Is brake fluid pressure distribution normal Yes gt gt INSPECTION END No Perform Basic Inspection Refer to BRC 20 Basic Inspection Revision January 2005 BRC 37 2004 Quest TROUBLE DIAGNOSES FOR SYMPTOMS TCS ABS Unexpected Pedal Action 1 CHECK WARNING LAMP ACTIVATION Make sure warning lamp remains off while driving OK or NG OK gt gt GO TO 2 NG gt gt Carry out self diagnosis Refer to BRC 24 SELF DIAGNOSIS 2 CHECK BRAKE PEDAL STROKE Check brake pedal stroke 15 pedal stroke excessive Yes gt gt Perform Basic Inspection Refer to BRC 20 Basic Inspection No gt gt GO TO 3 SBR540A 3 CHECK CONNECTOR AND BRAKING PERFORMANCE 1 Disable ABS by disconnecting ABS actuator and electric unit control unit connector 2 Drive vehicle and check brake operation NOTE Stopping distance may be longer than vehicles without ABS when road condition is slippery NOTE Driving the vehicle with the ABS actuator and electric unit control unit disconnected may induce DTCs
21. 2004 Quest EFS00353 TROUBLE DIAGNOSIS TCS ABS Schematic WFWAO0099E 2004 Quest 100 oe 2 QU NI HH 100 W31SAS 30H1NOO _ fer 5 4 4 5 SoL sav dns 100 1no do so NOILVNIBINOO t 00 NI H 0 CH 5 ino 14 eb mr 100 HOSN3S 133HM uv3H GION310S sz 2 HOSN3S SOLOW 133HA gt vc M V HOSN3S T33HM LNOWS 77 ee W31SAS NYO OL Ex ZJ 02 HI HOSN3S 733HM 1 0 LINN 10OHLNOO viva Sav 119 dois 9 X Nn 3603 asna asna 3604 NEED 1HV1S HO NO HOLIMS NOLLINDI Adaliva BRC 15 Revision January 2005 TROUBLE DIAGNOSIS TCS ABS Wiring Diagram TCS EFS00354 BRC TCS 01 IGNITION SWITCH ON OR START BATTERY IPDM E R INTELLIGENT FUSE
22. 2004 Quest TROUBLE DIAGNOSIS VDC TCS ABS BRC VDC 05 FUSE m REFER TO DATA LINE 6 STEERING M23 ANGLE SENSOR M47 lt TO LAN CAN vimm domom Q AES ACTUATOR urr AND EL IC UNI 2 CONTROL UNIT VDC CONTROL UNIT De BASES CUBE VUE BW B B B B A AL A M57 79 175 M57 REFER TO THE FOLLOWING FUSE BLOCK JUNCTION BOX J B WFWAO0045E Revision January 2005 BRC 64 2004 Quest TROUBLE DIAGNOSIS VDC TCS ABS Basic Inspection EFSQ036C BRAKE FLUID LEVEL FLUID LEAK AND BRAKE PAD INSPECTION 1 Check fluid level in the brake fluid reservoir If fluid level is low add fluid 2 Check brake piping and around the ABS actuator and electric unit control unit for leaks If there is leaking or seeping fluid check the following items e If ABS actuator and electric unit control unit connection is loose tighten the piping to the specified torque and recheck for leaks e If there is damage to the connection flare nut or ABS actuator and electric unit control unit threads replace the damaged part and recheck for leaks e When there is fluid leaking or seeping from a fluid connection use a clean cloth to wipe off the fluid and recheck for leaks If fluid is still seeping out replace the damaged part If the fluid is leaking at the
23. BRC 2 2004 Quest PRECAUTIONS TCS ABS PRECAUTIONS PFP 00001 Precautions for Supplemental Restraint System SRS AIR BAG and SEAT BELT PRE TENSIONER EFSODSUO The Supplemental Restraint System such as AIR BAG and SEAT BELT PRE TENSIONER used along with a front seat belt helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision This system includes seat belt switch inputs and dual stage front air bag modules The SRS system uses the seat belt switches to determine the front air bag deployment and may only deploy one front air bag depending on the severity of a collision and whether the front occupants are belted or unbelted Information necessary to service the system safely is included in the SRS and SB section of this Service Man ual WARNING e avoid rendering the SRS inoperative which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation all maintenance must be per formed by an authorized NISSAN INFINITI dealer e Improper maintenance including incorrect removal and installation of the SRS can lead to per sonal injury caused by unintentional activation of the system For removal of Spiral Cable and Air Bag Module see the SRS section e notuse electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual SRS wiring harnesses can be identified by y
24. Brake pedal not depressed OFF tion ABS warning lamp ON ON BRC 40 ABS Warning ABS warning lamp ON Lamp Does Not Come condition Note 2 ABS warning lamp OFF OFF On When Ignition Switch Is Turned On Ignition switch ON or engine OFF BEBE running ABS not activated ctuator Motor MOTOR RELAY MORE Hi a Motor Relay and Circuit y Ignition switch ON or engine ON Inspection running ABS activated Vehicle stopped Ignition Actuator relay opera Switch ON OFF BRC 33 Actuator Motor ACTUATOR RLY Motor Relay and Circuit tion status s stopped Engine run gy Inspection ning When SLIP indicator lamp is ON SLIP indicator lamp ON DI 8 Combination SLIP LAMP status Note 3 When SLIP indicator lamp is Meter OFF OFF FR LH IN SOL Actuator solenoid is active FR LH OUT SOL ACTIVE TEST with CON ON FR RH IN SOL SULT II or actuator relay is FR RH OUT SOL Solenoid valve opera inactive in fail safe mode _ RR RH IN SOL tion RR RH OUT SOL When actuator solenoid is RR LH IN SOL not active and actuator relay is OFF RR LH OUT SOL active ignition switch ON TCS FAIL SIG TCS fail TCS system ABS FAIL SIG Fail signal status ABS fail OFF ABS system EBD FAIL SIG EBD fail EBD system Note 1 Confirm tire pressure is normal Note 2 ON OFF timing of ABS warning lamp ON For approximately 2 seconds after ignition switch is turned ON or when a malfunction is detected OFF Approximately 2 seconds aft
25. Carry out self diagnosis Refer to BRC 24 SELF DIAGNOSIS Are malfunctions detected in self diagnosis Yes gt gt Refer to BRC 26 Display List No Refer to DI 22 WARNING LAMPS Revision January 2005 BRC 40 2004 Quest TROUBLE DIAGNOSES FOR SYMPTOMS TCS ABS Vehicle Jerks During TCS Activation EFS00s6N 1 ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT SELF DIAGNOSIS Perform ABS actuator and electric unit control unit self diagnosis Are self diagnosis result items displayed Yes gt gt After checking and repairing the applicable item perform the ABS actuator and electric unit con trol unit self diagnosis again No gt gt 2 2 ENGINE SPEED SIGNAL INSPECTION Perform data monitor with CONSULT II for the ABS actuator and electric unit control unit 15 the engine speed at idle 400 rpm or higher Yes GO TO 4 No gt gt GO 3 3 ECM SELF DIAGNOSIS Perform ECM self diagnosis Are self diagnosis result items displayed Yes gt gt After checking and repairing the applicable item perform the ECM self diagnosis again No GO TO 4 4 TCM SELF DIAGNOSIS Perform TCM self diagnosis Are self diagnosis result items displayed Yes gt gt After checking and repairing the applicable item perform the ECM self diagnosis again No gt gt GO TO 5 5 CONNECTOR INSPECTION Disconnect the ABS actuator and electric unit control unit conne
26. ENGINE SIGNAL 5 ECM judges the communication between ABS TCS VDC control C1134 unit and ECM is abnormal ENGINE SIGNAL 6 ECM judges the communication between ABS TCS VDC control C1136 unit and ECM is abnormal BRC 79 Engine Sys tem Inspection ACTR RELAY CIRCUIT C1140 ABS actuator relay or circuit malfunction BRC 84 Actuator BRC Motor Motor Relay and Circuit Inspection STOP LAMP SW 2 C1176 ASCD brake switch or circuit malfunction EC 715 AUTOMATIC SPEED CONTROL DEVICE ASCD Note 1 If wheel sensor 2 for each wheel is indicated check ABS actuator and electric unit control unit power supply voltage in addition to wheel sensor circuit check Note 2 If multiple malfunctions are detected including CAN communication line U1000 perform diagnosis for CAN communication line first Note 3 ACTUATOR RLY on the CONSULT II self diagnosis results indicates the malfunction of the actuator motor relay or circuit DATA MONITOR Operation Procedure 1 After turning OFF the ignition switch connect CONSULT II and the CONSULT II CONVERTER to the data link connector CAUTION If CONSULT II is used with no connection of CONSULT II CONVERTER malfunctions might be detected in self diagnosis depending on control unit which carry out CAN communication 2 Touch START NISSAN BASED VHCL ABS DATA MONITOR in order on the CONSULT II screen If ABS is not indicated
27. II CONVERTER to the data link connector CAUTION If CONSULT II is used with no connection of CONSULT II CONVERTER malfunctions might be detected in self diag nosis depending on control unit which carry out CAN com munication ata 3 Turn ignition switch ON connector BBIA0336E 4 Touch START NISSAN BASED VHCL CONSULT II ENGINE START NISSAN BASED START X BADGE VHCL SUB MODE NOTE EXAMPLE SHOWN ACTUAL DISPLAY MAY DIFFER BCIA0029E 5 Touch ABS in the SELECT SYSTEM screen If ABS is not indicated go to GI 37 CONSULT II Data Link SELECT SYSTEM Connector DLC Circuit ENGINE A T ABS AIR BAG IPDM BCM Page Down BACK LIGHT COPY NOTE EXAMPLE SHOWN ACTUAL DISPLAY MAY DIFFER A0030E Revision January 2005 BRC 69 2004 Quest 6 TROUBLE DIAGNOSIS VDC TCS ABS Select the required diagnostic location from the SELECT DIAG screen SELECT DIAG MODE For further information see the CONSULT II Operation Manual WORK SUPPORT SELF DIAG RESULTS CAN DIAG SUPPORT MNTR DATA MONITOR ACTIVE TEST ECU PART NUMBER Page Down BACK LIGHT COPY NOTE EXAMPLE SHOWN ACTUAL DISPLAY MAY DIFFER 0031 E SELF DIAGNOSIS Description If an error is detected in the system the ABS warning lamp will turn on In this case perform self diagnosi
28. Perform self diagnostic procedures 3 NO M Y Perform diagnostic procedure for symptom Check or repair malfunctioning part gt Y NG aU NEC GL 407 Perform self diagnostic procedures san J OK Revision January 2005 Erase self diagnostic results then drive vehicle more than minute at 30 km h 19 MPH or more Perform self diagnostic procedures again Inspection end BRC 12 NG Y Confirm symptom OK WFIAO395E 2004 Quest CLARIFY CONCERN TROUBLE DIAGNOSIS A customer s description of a vehicle concern may vary depend ing on the individual It is important to clarify the customer s con cern Ask the customer about what symptoms are present under what conditions Use this information to reproduce the symptom while driving It is also important to use the diagnosis sheet to understand what type of trouble the customer is having EXAMPLE OF DIAGNOSIS SHEET HOW TCS ABS KEY POINTS Vehicle mode Date Frequencies Road conditions Operating conditions Weather conditions Symptoms SBR339B Customer name Model amp Year Engine Trans Mileage Incident Date Manuf Date In Service Date Symptoms Noise and vibration from engine compartment Noise and vibration from axle ABS warning lamp activates SLIP warning lamp activates
29. SENSOR INSPECTION 1 Connect the yaw rate sensor side decel sensor connector M46 and ABS actuator and electric unit con trol unit connector E125 2 Use Data Monitor to check if the yaw rate sensor side decel G sensor signals are normal Vehicle status Yaw rate sensor Side G sensor Data monitor standard Data monitor standard When stopped 4 to 4 deg s 1 1 to 1 1 m s Right hand turn Negative value Negative value Left turn Positive value Positive value OK or NG OK gt gt INSPECTION END NG gt gt Replace the yaw rate side decel G sensor Refer to BRC 100 Removal and Installation Revision January 2005 BRC 82 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS VDC TCS ABS Solenoid and VDC Change Over Valve System Inspection INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK EFS0036L Check self diagnosis results Self diagnosis results FR LH IN ABS SOL FR LH OUT ABS SOL RR RH IN ABS SOL RR RH OUT ABS SOL FR RH IN ABS SOL FR RH OUT ABS SOL RR LH IN ABS SOL RR LH OUT ABS SOL CV 1 2 SV 1 SV2 Is the above displayed in the self diagnosis display items Yes gt gt GO TO 2 No gt gt INSPECTION END 2 CONNECTOR INSPECTION 1 Disconnect ABS actuator and electric unit control unit connector E125 2 Check the terminals for deformation disconnection looseness or damage OK or NG OK gt gt GO TO 3 NG gt gt
30. TO 4 NG Repair as necessary 4 CHECK BRAKE FLUID PRESSURE Check brake fluid pressure distribution Refer to BR 14 Inspection Is brake fluid pressure distribution normal Yes gt gt INSPECTION END No Perform Basic Inspection Refer to BRC 65 Basic Inspection Revision January 2005 BRC 89 2004 Quest TROUBLE DIAGNOSES FOR SYMPTOMS VDC TCS ABS Unexpected Pedal Action EFS0036T 1 CHECK WARNING LAMP ACTIVATION Make sure warning lamp remains off while driving OK or NG OK gt gt GO 2 NG gt gt Carry out self diagnosis Refer to BRC 70 SELF DIAGNOSIS 2 CHECK BRAKE PEDAL STROKE Check brake pedal stroke Is pedal stroke excessive Yes gt gt Perform Basic Inspection Refer to BRC 65 Basic Inspection No gt gt GO TO 3 SBR540A 3 CHECK CONNECTOR AND BRAKING PERFORMANCE 1 Disable ABS by disconnecting ABS actuator and electric unit control unit connector 2 Drive vehicle and check brake operation NOTE Stopping distance may be longer than vehicles without ABS when road condition is slippery NOTE Driving the vehicle with the ABS actuator and electric unit control unit disconnected may induce DTCs in electrical control units using CAN communication After the inspection clear all DTCs Refer to LAN 6 CAN COMMUNICATION OK or NG OK GO TO 4 NG Perform Basic Inspection Refer to BRC 65 Basic Inspection 4 CHECK W
31. by CONSULT II instead of a technician to determine whether each system is OK ECU PART NUMBER ABS actuator and electric unit control unit part number can be read CONSULT II BASIC OPERATION PROCEDURE 1 Turn ignition switch OFF 2 Connect CONSULT II CONSULT II CONVERTER to the data link connector CAUTION If CONSULT II is used with no connection of CONSULT II CONVERTER malfunctions might be detected in self diag nosis depending on control unit which carry out CAN com munication ata 3 Turn ignition switch ON connector BBIA0336E 4 Touch START NISSAN BASED VHCL CONSULT II ENGINE START NISSAN BASED START X BADGE VHCL SUB MODE NOTE EXAMPLE SHOWN ACTUAL DISPLAY MAY DIFFER BCIA0029E 5 Touch ABS in the SELECT SYSTEM screen If ABS is not indicated go to GI 37 CONSULT II Data Link SELECT SYSTEM Connector DLC Circuit ENGINE A T ABS AIR BAG IPDM BCM Page Down BACK LIGHT COPY NOTE EXAMPLE SHOWN ACTUAL DISPLAY MAY DIFFER A0030E Revision January 2005 BRC 23 2004 Quest 6 TROUBLE DIAGNOSIS TCS ABS Select the required diagnostic location from the SELECT DIAG screen SELECT DIAG MODE For further information see the CONSULT II Operation Manual WORK SUPPORT SELF DIAG RESULTS CAN DIAG SUPPORT MNTR DATA MONITOR ACTIVE TE
32. displayed FR RH SENSOR x T Wheel speed calculated by front RH km h MPH wheel sensor signal is displayed FR LH SENSOR X Wheel speed calculated by front LH km h MPH wheel sensor signal is displayed RR RH SENSOR 7 y Wheel speed calculated by rear RH km h MPH wheel sensor signal is displayed Revision January 2005 BRC 26 2004 Quest TROUBLE DIAGNOSIS TCS ABS Data monitor item selection tem Unit ECU INPUT MAIN SELECTION Remarks SIGNALS SIGNALS FROM MENU RR LH SENSOR 5 Wheel speed calculated by rear LH km h MPH wheel sensor signal is displayed Voltage supplied to ABS actuator es VOLT x x x and electric unit control unit is dis v played SLCT LVR POSI 2 Shift position judged by PNP switch signal Throttle valve open close status ita judged CAN communication sig 26 nal is displayed ENGINE SPEED Engine speed judged by CAN com rpm munication signal is displayed STOP LAMP SW 2 Stop lamp switch ON OFF status ON OFF is displayed ABS WARN LAMP _ M y ABS warning lamp ON OFF status ON OFF is displayed SLIP LAMP SLIP indicator lamp ON OFF sta ON OFF tus is displayed FR LH IN SOL E x Front LH IN ABS solenoid ON ON OFF OFF status is displayed FR LH OUT SOL y Front LH OUT ABS solenoid ON ON OFF OFF status is displayed RR RH IN SOL
33. e When an error is indicated by ABS or another warning lamp collect all necessary information from cus tomer what symptoms are present under what conditions and check for simple causes before starting diagnosis Besides electrical system inspection check booster operation brake fluid level and fluid leaks e f incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts stopping distance or steering stability may deteriorate e is a radio antenna or related wiring near control module ABS function may have a malfunction or error e f aftermarket parts car stereo CD player etc have been installed check for incidents such as harness pinches open circuits or improper wiring Precautions for CAN System 5 not apply voltage of 7 0V or higher to terminal to be measured e Maximum open terminal voltage of tester in use must be less than 7 0V e Before checking harnesses turn ignition switch OFF and disconnect battery negative cable e Area to be repaired must be soldered and wrapped with tape Make sure that fraying of twisted wire is within 110 mm 4 33 in Soldered and wound with tape PKIA0306E e make a bypass connection to repaired area If the circuit is bypassed characteristics of twisted wire will be lost NG Bypass wire connection PKIA0307E Revision January 2005 BRC 4 200
34. is displayed RR LH IN SOL _ Rear LH IN ABS solenoid ON ON OFF OFF status is displayed RR LH OUT SOL z x x Rear LH OUT ABS solenoid ON ON OFF OFF status is displayed OFF LAMP _ VDC OFF Lamp ON OFF status is ON OFF displayed Revision January 2005 BRC 74 2004 Quest TROUBLE DIAGNOSIS VDC TCS ABS Data monitor item selection Item Unit ECU INPUT MAIN SELECTION Remarks SIGNALS SIGNALS FROM MENU MOTOR RELAY k x ABS motor relay signal ON OFF ON OFF status is displayed ACTUATOR RLY ABS actuator relay signal ON x ON OFF OFF status is displayed Primary side switch over solenoid ON OFF valve cut valve status is displayed CV2 Secondary side switch over sole ON OFF noid valve cut valve ON OFF status is displayed SV1 Primary side switch over solenoid ON OFF valve suction valve ON OFF sta tus is displayed Secondary side switch over sole ON OFF noid valve suction valve ON OFF status is displayed VDC FAIL SIG _ VDC fail signal ON OFF status is ON OFF displayed TCS FAIL SIG _ _ TCS fail signal status is ON OFF displayed ABS FAIL SIG _ _ ABS fail signal ON OFF status is ON OFF displayed EBD FAIL SIG _ _ EBD fail signal ON OFF status is ON OFF displayed FLUID LEV SW _ Brake fluid level switch ON OFF
35. magnets and a sensor element The wheel sensors are installed on the inner side of the wheel knuckles As the wheel rotates the sensor generates a square wave signal The frequency increases as the wheel speed increases Control unit Magnetic flux WFIA0033E Fail Safe Function EFS0034Y CAUTION If the Fail Safe function is activated perform the Self Diagnosis for ABS TCS system ABS EBD SYSTEM In case of an electrical malfunction with the ABS the ABS warning lamp and SLIP indicator lamp will turn on In case of an electrical malfunction with the EBD system the BRAKE warning lamp ABS warning lamp and SLIP indicator lamp will turn on The system will revert to one of the following conditions of the Fail Safe function 1 For ABS malfunction only the EBD is operative and the condition of the vehicle is the same condition of vehicles without ABS TCS system 2 For EBD malfunction the EBD and ABS become inoperative and the condition of the vehicle is the same as the condition of vehicles without ABS TCS and EBD system TCS SYSTEM In case of TCS system malfunction the SLIP indicator lamp is turned on and the condition of the vehicle is the same as the condition of vehicles without TCS system In case of an electrical malfunction with the TCS sys tem the ABS control continues to operate normally without TCS control Revision January 2005 BRC 8 2004 Quest Hydraulic Circuit Diagram Pr
36. may vibrate or a motor operating noise may be heard from engine compartment This is a normal status of operation check Revision January 2005 BRC 50 2004 Quest SYSTEM DESCRIPTION VDC TCS ABS TCS Function EFso0se2 e Spinning of the drive wheels is detected by the ABS TCS VDC control unit using inputs from the wheel speed sensors If wheel spin occurs the drive wheel right and left brake fluid pressure control and engine fuel cut are conducted while the throttle value is restricted to reduce the engine torque and decrease the amount of wheel spin In addition the throttle opening is controlled to achieve the optimum engine torque e Depending on road condition the vehicle may have a sluggish feel This is normal because optimum trac tion has the highest priority during TCS operation e TCS may be activated during sudden vehicle acceleration wide open throttle acceleration sudden trans mission shifts or when the vehicle is driven on a road with a varying surface friction coefficient e The SLIP indicator lamp flashes to inform the driver of TCS operation VDC Function e In addition to the ABS TCS function the driver steering amount and brake operation amount are detected from the steering angle sensor and pressure sensor and the vehicle s driving status amount of under steering over steering is determined using inputs from the yaw rate sensor side G sensor wheel speed sensors etc and this information is used
37. sensor system might be displayed but in this case there is no problem with the yaw rate sensor system As soon as the vehicle leaves the turntable or moving object restart the engine to return the system to normal Is the above displayed in the self diagnosis display items Yes gt gt GO TO 2 No gt gt INSPECTION END Revision January 2005 BRC 81 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS VDC TCS ABS 2 CONNECTOR INSPECTION Disconnect the ABS actuator and electric unit control unit connector E125 and yaw rate side decel G sensor connector B125 Check the terminals for deformation disconnection looseness or damage OK or NG OK gt gt GO 3 gt gt Repair or replace as necessary 3 YAW RATE SIDE DECEL G SENSOR HARNESS INSPECTION 1 Turn off the ignition switch and disconnect yaw rate sensor side decel G sensor connector B125 and ABS actuator and electric unit control unit connector E125 2 Check the continuity between the ABS actuator and electric unit control unit connector E125 and the yaw rate side decel G sensor connector M46 ABS actuator and electric unit Yaw rate side decel G sensor Continuit control unit connector E125 connector B125 y 19 O B 1 O B 36 Y 2 Y 35 G 3 G m Continuity should exist 34 B 4 B 4 R 5 R 6 W 6 W OK or NG OK GO TO 4 NG Repair or replace as necessary 4 YAW RATE SIDE DECEL G
38. the self diagnosis display items Yes gt gt GO TO 2 No gt gt INSPECTION END 2 CONNECTOR INSPECTION 1 Disconnect the ABS actuator and electric unit control unit connector E125 and stop lamp switch connec tor E38 2 Check the terminals for deformation disconnection looseness or damage OK or NG OK gt gt GO TO 3 NG gt gt Repair or replace as necessary Revision January 2005 BRC 85 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS VDC TCS ABS d STOP LAMP SWITCH INSPECTION Check the voltage between the ABS actuator and electric unit con trol unit connector E125 terminal 23 R G and ground A s 23 R G Ground ABS actuator and electric men Brake pedal depressed Battery voltage unit control unit connector approx 12V Brake pedal depressed Approx OK or NG OK gt gt Perform self diagnosis again If the same results appear replace ABS actuator and electric unit control unit Refer to BRC 97 Removal and Installation NG Repair the circuit ABS TCS VDC Control Unit Power and Ground Systems Inspection EFs00360 INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK WFIA0114E Check self diagnosis results Self diagnosis results BATTERY VOLTAGE Is the above displayed in the self diagnosis display items Yes gt gt GO TO 2 No gt gt INSPECTION END 2 CONNECTOR INSPECTION 1 Disconnect the ABS a
39. uvad 1NOH4 1NOH4 OO OO OO mms TT n aia PED 340 NOLLVNIAD TII 6 69 6 69 69 6 JAVA GION3108 LOYIN zasn LASH ZASH NI 1no NI 1no NI NI 89 ud ud 14 RS HOLOW LINN 1OHINOO 2910913 ONY HOLVALOV JAVA GION3108 PN A sav 1 91 9H t 8 bd WAISAS OL acm PE qe i HOLIMS f 4057 i LIA HOSN3S noums 9 SNIH331S dois 29 LINN 3OHLNOO G3ldiNn 458 73930 301S 3LVH 20A HO103NNOO 3781874 3161613 asn4 Schematic 1 15 HO NO HOLIMS NOLLINDI AHaliva WFWAO0040E 2004 Quest BRC 59 Revision January 2005 TROUBLE DIAGNOSIS VDC TCS ABS Wiring Diagram VDC EFs00368 IGNITION SWITCH IGNITION SWITCH IPDM E R FUSE REFER TO INTELLIGENT BLOCK POWER J B PG POWER DISTRIBUTION MODULE E30 ENGINE ROOM 80 EI I GR STOP LAMP SWITCH E38 DATA LINK CONNECTOR m m R G gt TO e EC ASCBOF DI WARN 7 EC ASC BS LT STOP L
40. 127 Circuit of rear RH OUT ABS solenoid is open or shorted or con trol line is open or shorted to power supply or ground FR RH IN ABS SOL C1122 Circuit of front RH IN ABS solenoid is open or shorted or control line is open or shorted to power supply or ground FR RH OUT ABS SOL C1123 Circuit of front RH OUT ABS solenoid is open or shorted or con trol line is open or shorted to power supply or ground RR LH IN ABS SOL C1124 Circuit of rear LH IN ABS solenoid is open or shorted or control line is open or shorted to power supply or ground RR LH OUT ABS SOL C1125 Circuit of rear LH OUT ABS solenoid is open or shorted or con trol line is open or shorted to power supply or ground BRC 32 Solenoid Valve PUMP MOTOR Note 3 C1111 During actuator motor operation with ON when actuator motor turns OFF or when control line for actuator motor relay is open During actuator motor operation with OFF when actuator motor turns ON or when control line for relay is shorted to ground BRC 33 Actuator Motor Motor Relay and Circuit Inspection STOP LAMP SW Stop lamp switch or circuit malfunction 34 Stop Lam Switch System Inspec C1116 am BRC 35 ABS TCS 2 ABS actuator and electric unit control unit power voltage is too Control Unit Power and 1 low Ground Systems Inspec tion CONTROLLER FAILURE C1110 Revision J
41. 2 Rear RH IN ABS solenoid ON ON OFF OFF status is displayed RR RH OUT SOL 3 Rear RH OUT ABS solenoid ON ON OFF OFF status is displayed FR RH IN SOL Y 2 Front RH IN ABS solenoid ON ON OFF OFF status is displayed FR RH OUT SOL 4 Front RH OUT ABS solenoid ON ON OFF OFF status is displayed RR LH IN SOL T Rear LH IN ABS solenoid ON ON OFF OFF status is displayed RR LH OUT SOL T Rear LH OUT ABS solenoid ON ON OFF OFF status is displayed OFF LAMP OFF Lamp ON OFF status is dis ON OFF played MOTOR RELAY _ 7 ABS motor relay signal ON OFF ON OFF status is displayed ACTUATOR RLY _ ABS actuator relay signal ON ON OFF OFF status is displayed TCS FAIL SIG E _ TCS fail signal ON OFF status is ON OFF displayed ABS FAIL SIG _ gt ABS fail signal status is ON OFF displayed EBD FAIL SIG E y EBD fail signal ON OFF status is ON OFF displayed FLUID LEV SW E Brake fluid level switch ON OFF ON OFF status is displayed EBD SIGNAL _ EBD operation ON OFF status is ON OFF displayed Revision January 2005 BRC 27 2004 Quest TROUBLE DIAGNOSIS TCS ABS Data monitor item selection em Unit ECU INPUT MAIN SELECTION Remarks SIGNALS SIGNALS FROM MENU ABS SIGNAL _ _ ABS operation ON OFF status is ON OFF displayed TCS SIGNAL _ x TCS operation ON OFF status is ON OFF displ
42. 25 28 LG B122 2 LG Continuity should exist OK or NG OK gt gt ABS actuator and electric unit control unit Refer to BRC 44 Removal and Installa NG gt gt Repair the circuit Engine System Inspection EFS0036A INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK Check self diagnosis results Self diagnosis results ENGINE SIGNAL 1 ENGINE SIGNAL 2 ENGINE SIGNAL 3 ENGINE SIGNAL 4 ENGINE SIGNAL 5 Is the above displayed in the self diagnosis display items Yes gt gt GO TO 2 No gt gt INSPECTION END 2 ENGINE SYSTEM INSPECTION 1 Perform ECM self diagnosis and repair as necessary 2 Perform ABS actuator and electric unit control unit self diagnosis again OK or NG OK gt gt INSPECTION END NG gt gt Repair or replace as necessary Revision January 2005 BRC 31 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS TCS ABS ABS TCS Control Unit Inspection EFs00358 INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK Check self diagnosis results Self diagnosis results CONTROLLER FAILURE 15 the above displayed in the self diagnosis display items Yes Replace ABS actuator and electric unit control unit Refer to BRC 44 Hemoval and Installation No INSPECTION END Solenoid Valve System Inspection INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK Check self diagnosis results Self diagnosis results FR LH IN A
43. 4 Quest ACTUATOR AND ELECTRIC UNIT ASSEMBLY VDC TCS ABS INSTALLATION Installation is in the reverse order of removal e Refer to BR 12 BRAKE PIPING AND HOSE when connecting the brake tubes CAUTION To install use a flare nut wrench commercial service tool e Always tighten brake tubes to specified torque when installing e Never reuse drained brake fluid e After installation of the ABS actuator and electric unit control unit refill brake system with new brake fluid Then bleed the air from the system Refer to BR 11 Bleeding Brake System NOTE In the case that ABS actuator and electric unit control unit is replaced make sure to adjust position of steer ing angle sensor Refer to BRC 94 Adjustment of Steering Angle Sensor Neutral Position Revision January 2005 BRC 98 2004 Quest STEERING ANGLE SENSOR VDC TCS ABS STEERING ANGLE SENSOR PFP 25554 Removal and Installation rm NOTE The steering angle sensor is an integral part of the spiral cable Refer to SRS 46 Removal and Installation Revision January 2005 BRC 99 2004 Quest SENSOR VDC TCS ABS G SENSOR PFP 47930 Removal and Installation EFSO0376 REMOVAL 1 Remove center console lower cover Refer to IP 10 Removal and Installation 2 Remove yaw rate side decel G sensor attaching nuts CAUTION e Do not use power tools to remove or install yaw rate side decel G sensor e Do not drop or strike the yaw rate si
44. 4 Quest PRECAUTIONS TCS ABS Wiring Diagrams and Trouble Diagnosis When you read wiring diagrams refer to the following e Gl 12 How to Read Wiring Diagrams e PG 4 POWER SUPPLY ROUTING CIRCUIT When you perform trouble diagnosis refer to the following e GI 10 HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES e Gl 25 How to Perform Efficient Diagnosis for an Electrical Incident EFS0034Q Revision January 2005 BRC 5 2004 Quest PREPARATION TCS ABS PFP 00002 PREPARATION Special Service Tool The actual shapes of Kent Moore tools may differ from those of special service tools illustrated here Tool number Kent Moore No Tool name J 45741 ABS active wheel sensor tester EFS0034R Description Checking operation of ABS active wheel sen sors Commercial Service Tools Tool name EFS0034S Description 1 Flare nut crowfoot Removing and installing brake piping 2 Torque wrench a 10mm 0 39 in 12mm 0 47 in S NT360 Revision January 2005 BRC 6 2004 Quest SYSTEM DESCRIPTION TCS ABS SYSTEM DESCRIPTION 00000 System Diagram EFSo0S4T Data link connector Trouble Front RH wheel inlet solenoid valve for CONSULT II diagnosis circuit per Front RH wheel outlet solenoid valve Front RH wheel sensor Front LH wheel inlet solenoid valve NE vL rx ront LH wheel outlet solenoid valve Hear RH wheel inlet solenoid valve Control circuit MES Rear RH whee
45. ABS actuator and electric unit control unit replace the ABS actuator and electric unit control unit assem bly CAUTION The ABS actuator and electric unit control unit cannot be disassembled and must be replaced as an assembly 3 Checkthe brake pads for excessive wear POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION Make sure the battery positive cable negative cable and ground connection are not loose In addition make sure the battery is sufficiently charged ABS WARNING LAMP SLIP INDICATOR LAMP AND VDC OFF INDICATOR LAMP INSPECTION 1 Make sure ABS warning lamp SLIP indicator lamp and VDC OFF indicator lamp when VDC OFF switch is off turn on for approximately 2 seconds when the ignition switch is turned ON If they do not check the VDC OFF indicator lamp and the VDC OFF switch Refer to BRC 88 VDC OFF SWITCH Check CAN communications If there are no errors with the VDC OFF switch or CAN communication system check combination meter Refer to DI 5 COMBINATION METERS Make sure the lamps turn off approximately 2 seconds after the ignition switch is turned ON If the lamp does not turn off conduct self diagnosis With the engine running make sure the VDC OFF indicator lamp turns on and off when the VDC OFF switch is turned on and off If the indicator lamp status does not correspond to switch operation check the VDC OFF switch Refer to BRC 88 VDC OFF SWITCH Make sure ABS warning lamp SLIP indicato
46. ARNING e avoid rendering SRS inoperative which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation all maintenance must be per formed by an authorized NISSAN INFINITI dealer e Improper maintenance including incorrect removal and installation of the SRS can lead to per sonal injury caused by unintentional activation of the system For removal of Spiral Cable and Air Bag Module see the SRS section e electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual SRS wiring harnesses can be identified by yellow and or orange harnesses or harness connectors Precautions for Brake System 500355 CAUTION e Refer to MA 10 RECOMMENDED FLUIDS AND LUBRICANTS for recommended brake fluid e Never reuse drained brake fluid Be careful not to splash brake fluid on painted areas it may cause paint damage If brake fluid is splashed on painted areas wash it away with water immediately To clean or wash all parts of master cylinder and disc brake caliper use clean brake fluid Never use mineral oils such as gasoline or kerosene They will ruin rubber parts of the hydraulic system e Use flare nut wrench when removing and installing brake tube Ifa brake fluid leak is found the part must be disassembled without fail Then it has to be replaced with a new one if a defect exists e Turn the ignitio
47. BS SOL FR LH OUT ABS SOL FR RH IN ABS SOL FR RH OUT ABS SOL RR LH IN ABS SOL RR LH OUT ABS SOL RR RH IN ABS SOL RR RH OUT ABS SOL 15 the above displayed in the self diagnosis display items Yes gt gt GO TO2 No gt gt Inspection End 2 CONNECTOR INSPECTION 1 Disconnect ABS actuator and electric unit control unit connector E125 2 Check the terminals for deformation disconnection looseness or damage OK or NG OK gt gt GO 3 gt gt Repair replace as necessary Revision January 2005 BRC 32 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS TCS ABS CHECKING SOLENOID POWER AND GROUND 1 Check voltage between ABS actuator and electric unit control unit harness connector E125 and ground A ABS actuator and electric Bod Measured ABS actuator and electric unik Mid unit control unit value control unit harness connector connector E125 g Approx 15 15 Y 12V WFIA0396E 2 Check resistance between ABS actuator and electric unit con trol unit harness connector E125 and body ground A i T S ABS actuator and electric Body Measured ABS and eek ums unit control unit ground value control unit harness connector connector E125 Approx 16 30 16 B 00 1 30 00 Ci OK or NG OK gt gt Perform self diagnosis again If the same results appear replace ABS actu
48. F BRAKES BRAKE CONTROL SYSTEM TCS ABS AND BATTERY INSPECTION _ ABS WARNING LAMP SLIP INDICATOR LAMP PRECAUTIONS nva de cuu 3 ANDTCSOFF INDICATOR LAMP INSPECTION 20 Precautions for Supplemental Restraint System Warning Lamp and Indicator Timing 21 585 AIR and SEAT BELT PRE TEN Control Unit Input Output Signal Standard 21 SIONER 3 REFERENCE VALUE FROM CONSULT I 21 Precautions for Brake System 3 CONSULT II Function ABS 23 Precautions When Using CONSULT II 3 CONSULT IIBASICOPERATIONPROCEDURE CHECK POINTS FOR USING CONSULT II 3 2223 Precautions for Brake Control 2 SEEF DIAGNOSIS 24 Precautions for CAN System 4 DATA MONITOR Edo tee 26 Wiring Diagrams and Trouble Diagnosis 5 ACTIVE TES T 28 PREPARATION 22 2217 6 TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC Special Service Tool 4 4 ei iR SRM 30 Commercial Service Tools es 6 Wheel Sensor System Inspection 30 SYSTEM DESCRIPTI
49. HEEL SENSORS Check the following e Wheel sensor mounting for looseness e Wheel sensors for physical damage e Wheel sensor connectors for terminal damage or loose connections OK or NG OK Check ABS actuator and electric unit control unit connector terminals for deformation discon nection looseness or damage Reconnect ABS actuator and electric unit control unit harness connector Then retest NG Repair or replace as necessary Revision January 2005 BRC 90 2004 Quest TROUBLE DIAGNOSES FOR SYMPTOMS VDC TCS ABS Long Stopping Distance 500360 1 CHECK BASE BRAKING SYSTEM PERFORMANCE 1 Disable ABS by disconnecting ABS actuator and electric unit control unit connector 2 Drive vehicle and check brake operation NOTE Stopping distance may be longer than vehicles without ABS when road condition is slippery NOTE Driving the vehicle with the ABS actuator and electric unit control unit disconnected may induce DTCs in electrical control units using CAN communication After the inspection clear all DTCs Refer to LAN 6 CAN COMMUNICATION OK or NG OK Go to BRC 89 ABS Works Frequently NG Perform Basic Inspection Refer to BRC 65 Basic Inspection ABS Does Not Work e CAUTION The ABS does not operate when the vehicle speed is 10 km h 6 MPH or less 1 CHECK WARNING LAMP ACTIVATION Turn ignition switch ON and check for warning lamp activation e Warning lamp should activa
50. NSPECTION Check the CAN communication system Refer to BRC 88 CAN Communication System Inspection OK or NG OK gt gt INSPECTION END NG gt gt Refer to 6 CAN COMMUNICATION Revision January 2005 BRC 93 2004 Quest ON VEHICLE SERVICE VDC TCS ABS ON VEHICLE SERVICE PFP 00000 Adjustment of Steering Angle Sensor Neutral Position EFs00870 After removing installing or replacing ABS actuator and electric unit control unit steering angle sensor steer ing components suspension components tires or after adjusting wheel alignment be sure to adjust neutral position of steering angle sensor before running vehicle NOTE Adjustment of steering angle sensor neutral position requires CONSULT II 1 Stop vehicle with front wheels in straight ahead position 2 Connect CONSULT II to data link connector on vehicle and turn ignition switch ON do not start engine 3 Touch ABS WORK SUPPORT and ST ANGLE SENSOR ADJUSTMENT on CONSULT II screen in this order Data link E connector 0336 4 Touch START CAUTION ST ANGLE SENSOR ADJUSTMENT Do not touch steering wheel while adjusting steering angle sensor 5 After approximately 10 seconds touch END After approxi mately 60 seconds it ends automatically NEUTRAL POSITION WHEN DRIVING STRAIGHT AHEAD 6 Turn ignition switch OFF then turn it ON again 7 Run vehicle with front wheels in straight ahead
51. OFF ON ON OFF OFF OFF FR LH ABS SOLE NOID ACT FR LH OUT SOL OFF OFF ON OFF OFF OFF RR RH SOL RR RH IN SOL OFF ON ON OFF OFF OFF RR RH ABS SOLE NOID ACT RR RH OUT SOL OFF OFF ON OFF OFF OFF Revision January 2005 BRC 28 2004 Quest TROUBLE DIAGNOSIS TCS ABS ABS solenoid valve ABS solenoid valve ACT Operation ACTUA ACTUA Bn KEER DOWN TORUP TOR RRLH SOL RR LH IN SOL OFF ON ON OFF OFF OFF RR LH ABS SOLE NOID ACT RR LH OUT SOL OFF OFF ON OFF OFF OFF RR RH IN SOL OFF ON ON OFF OFF OFF RR RH OUT SOL OFF OFF ON OFF OFF OFF REAR SOL RR LH IN SOL OFF ON ON OFF OFF OFF RR LH OUT SOL OFF OFF ON OFF OFF OFF ON for 1 to 2 seconds after the touch and then OFF NOTE e If active test is performed with brake pedal depressed pedal stroke may change This is normal e TEST IS STOPPED is displayed approximately 10 seconds after operation starts e After TEST IS STOPPED is displayed to perform test again repeat Step 6 ABS Motor Touch and OFF on the screen Check that ABS motor relay ACINETEST operates as shown in table below ABS MOTOR MONITOR Operation ON OFF MOTOR RELAY ACTUATOR RLY ABS actuator relay ON ON ABS motor relay ON OFF NOTE e f active test is performed with brake pedal depressed pedal stroke may change This is norma
52. ON MH 7 Engine System Inspection 31 System Diagram vett Hg Pu Igor 7 ABS TCS Control Unit Inspection 32 ABS Function 7 Solenoid Valve System Inspection 32 EBD Function 7 Actuator Motor Motor Relay and Circuit Inspection 33 TOS FUNCOM 7 Stop Lamp Switch System Inspection 34 Wheel Sensors nnns 8 ABS TCS Control Unit Power and Ground Systems Fail Safe Function 4 040 00 0 44 8 Seasons ti 35 ABS EBD SYSTEM 8 CAN Communication System Inspection 36 TOS SYSTEM jit siete 8 Component Inspection eee 36 Hydraulic Circuit Diagram 10t 9 TCS OFF SWITCH 36 CAN COMMUNICATION 10 TROUBLE DIAGNOSES FOR SYMPTOMS 37 System Description aci tnra raa 10 ABS Works Frequently 37 TROUBLE DIAGNOSIS 11 Unexpected Pedal Action 38 How to Perform Trouble Diagnoses for Quick and Long Stopping Distance 39 Accurate 11 ABS Does Not 39 INTRODUCTION 11 Pedal Vibration or ABS Operation Noise
53. ON OFF status is displayed EBD SIGNAL _ _ EBD operation ON OFF status is ON OFF displayed ABS SIGNAL _ _ ABS operation ON OFF status is ON OFF displayed TCS SIGNAL _ TCS operation ON OFF status is ON OFF displayed VDC SIGNAL _ _ VDC operation ON OFF status is ON OFF displayed MAP S C _ e S C is selected for engine torque map TRQ MAP N A N A is selected for engine x Applicable Not applicable ACTIVE TEST CAUTION e Do not perform active test while driving e Make sure to completely bleed air from the brake system e The ABS and brake warning lamps turn on during the active test Operation Procedure 1 Connect the CONSULT II and CONSULT II CONVERTER to the data link connector and start the engine CAUTION If CONSULT II is used with no connection of CONSULT II CONVERTER malfunctions might be detected in self diagnosis depending on control unit which carry out CAN communication 2 Touch START NISSAN BASED VHCL on the display screen Revision January 2005 BRC 75 2004 Quest TROUBLE DIAGNOSIS VDC TCS ABS 3 Touch ABS If ABS is not indicated to GI 37 CONSULT II Data Link Connector DLC Circuit 4 Touch ACTIVE TEST The SELECT TEST ITEM screen is displayed 6 Touch necessary test item SELECT TEST ITEM FR RH SOL FR LH SOL REAR SOL ABS MOTOR 7 With the MAIN SIGNALS display selected touch START
54. RC 56 NG Y Confirm symptom OK WFIAO358E 2004 Quest CLARIFY CONCERN TROUBLE DIAGNOSIS A customer s description of a vehicle concern may vary depend ing on the individual It is important to clarify the customer s con cern Ask the customer about what symptoms are present under what conditions Use this information to reproduce the symptom while driving It is also important to use the diagnosis sheet to understand what type of trouble the customer is having EXAMPLE OF DIAGNOSIS SHEET HOW VDC TCS ABS KEY POINTS Vehicle mode Date Frequencies Road conditions Operating conditions Weather conditions Symptoms SBR339B Customer name Model amp Year Engine Trans Mileage Incident Date Manuf Date In Service Date Symptoms Noise and vibration from engine compartment Noise and vibration from axle ABS warning lamp activates SLIP warning lamp activates Pedal operation Large stroke pedal operation Firm pedal TCS does not work drive wheels slip when accelerating ABS does not work wheels slip when braking Lack of sense of acceleration Engine conditions When starting After starting Road conditions Bumps potholes Low friction road 0 Snow C Gravel C Other Driving conditions Full accelera
55. Removal and Installation The front wheel sensor rotor is built into the front wheel hub For removal and installation procedure refer to RAX 6 Removal and Installation NOTE The rear wheel sensor rotor is built into the rear wheel hub For removal and installation procedure refer to RAX 6 Removal and Installation Revision January 2005 BRC 43 2004 Quest ACTUATOR AND ELECTRIC UNIT ASSEMBLY TCS ABS ACTUATOR AND ELECTRIC UNIT ASSEMBLY PFP 47660 Removal and Installation 21 2 1 15 kg m 16 0 N m kg m ft ib WFIA0279E 1 To left front 2 To rear right 3 To rear left 4 To front right 5 From the master cylinder secondary side 6 From the master cylinder primary side 7 ABS actuator and electric unit control 8 Harness connector unit REMOVAL 1 Disconnect the negative battery terminal Remove the cowl top extension Refer to El 18 Removal and Installation 2 3 Drain the brake fluid Refer to BR 11 Changing Brake Fluid 4 Disconnect the actuator harness from the ABS actuator and electric unit control unit CAUTION e To remove the brake tubes use a flare nut wrench to prevent the flare nuts and brake tubes from being damaged e Be careful not to splash brake fluid on painted areas 5 Disconnect the brake tubes 6 Remove the two bolts and then the ABS actuator and electric unit control unit Re
56. ST ECU PART NUMBER Page Down BACK LIGHT COPY NOTE EXAMPLE SHOWN ACTUAL DISPLAY MAY DIFFER 0031 E SELF DIAGNOSIS Description If an error is detected in the system the ABS warning lamp will turn on In this case perform self diagnosis as follows Operation Procedure 1 2 gt 11 Turn ignition switch OFF Connect CONSULT Il and CONSULT II CONVERTER to the data link connector CAUTION If CONSULT II is used with no connection of CONSULT II CONVERTER malfunctions might be detected in self diagnosis depending on control unit which carry out CAN communication Turn ignition switch ON Start engine and drive at approximately 30 km h 19 MPH or more for approximately 1 minute After stopping the vehicle with the engine running touch START NISSAN BASED VHCL ABS SELF DIAG RESULTS in order on the CONSULT II screen CAUTION If START NISSAN BASED is touched immediately after starting the engine or turning on the ignition switch ABS might not be displayed in the SELECT SYSTEM screen In this case repeat the operation from step 1 The self diagnostic results are displayed If necessary the self diagnostic results can be printed out by touching e When NO DTC IS DETECTED is displayed check the ABS warning lamp SLIP indicator lamp and TCS OFF indicator lamp Conduct the appropriate inspection from the display item list and repa
57. T BATTERY FUSE BLOCK JB REFER PG POWER COMBINATION METER M23 PRECEDING PAGE REFER TO THE FOLLOWING FUSE BLOCK JUNCTION BOX J B WFWAOOSOE Revision January 2005 BRC 19 2004 Quest TROUBLE DIAGNOSIS TCS ABS Basic Inspection 500355 BRAKE FLUID LEVEL FLUID LEAK AND BRAKE PAD INSPECTION 1 Check fluid level in the brake fluid reservoir If fluid level is low add fluid 2 Check the brake piping and around the ABS actuator and electric unit control unit for leaks If there is leaking or seeping fluid check the following items e ABS actuator and electric unit control unit connection is loose tighten the piping to the specified torque and recheck for leaks e f there is damage to the connection flare nut or ABS actuator and electric unit control unit threads replace the damaged part and recheck for leaks e When there is fluid leaking or seeping from a fluid connection use a clean cloth to wipe off the fluid and recheck for leaks If fluid is still seeping out replace the damaged part If the fluid is leaking at the ABS actuator and electric unit control unit replace the ABS actuator and electric unit control unit assem bly CAUTION The ABS actuator and electric unit control unit cannot be disassembled and must be replaced as an assembly 3 Check the brake pads for excessive wear POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION Make sure the bat
58. anuary 2005 Internal malfunction of ABS actuator and electric unit control unit BRC 25 BRC 32 ABS TCS Control Unit Inspection 2004 Quest TROUBLE DIAGNOSIS TCS ABS Self diagnostic item Malfunction detecting condition Check system e CAN communication line is open or shorted e ABS actuator and electric unit control unit internal malfunc BRG 36 CAN Commu UP oe tion nication System Inspec Battery voltage for ECM is suddenly interrupted for approxi tion Note 2 mately 0 5 second or more ENGINE SIGNAL 1 ECM judges the communication between ABS TCS control unit C1130 and ECM is abnormal ENGINE SIGNAL 2 ECM judges the communication between ABS TCS control unit 611311 and is abnormal ENGINE SIGNAL 3 ECM judges the communication between ABS TCS control unit BRC 31 Engine Sys C1132 and is abnormal tem Inspection ENGINE SIGNAL 4 ECM judges the communication between ABS TCS control unit C1133 and is abnormal ENGINE SIGNAL 5 ECM judges the communication between ABS TCS control unit C1134 and is abnormal BRC 33 Actuator ACTE ABS actuator relay or circuit malfunction Motor Motor Relay and C1140 mm av Circuit Inspection Note 1 If wheel sensor 2 for each wheel is indicated check ABS actuator and electric unit control unit power supply voltage in addition to wheel sensor circuit check Note 2 If mu
59. ator and electric unit control unit Refer to BRC 44 Removal and Installation NG gt gt Repair the circuit Actuator Motor Motor Relay and Circuit Inspection EFS00350 INSPECTION PROCEDURE 1 CHECKING SELF DIAGNOSIS RESULTS WFIA0397E Check self diagnosis results Self diagnosis results PUMP MOTOR ACTR RELAY CIRCUIT Is the above displayed in the self diagnosis display items Yes gt gt GO TO 2 No gt gt INSPECTION END 2 CONNECTOR INSPECTION Disconnect the ABS actuator and electric unit control unit connector E125 Check the terminals for deformation disconnection looseness or damage OK or NG OK gt gt GO TO 3 NG gt gt Repair or replace as necessary Revision January 2005 BRC 33 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS TCS ABS 3 CHECKING ABS MOTOR AND MOTOR RELAY POWER SYSTEM A 1 Check voltage between ABS actuator and electric unit control unit connector E125 and body ground ABS actuator and electric Measured ABS actuator and electric unit control unit value unit control unit connector Ped connector E125 9 1 1 12V WFIA0106E 2 Check resistance between ABS actuator and electric unit con trol unit connector E125 and ground A unit control unit ii d value unit control unit connector Ped connector E125 9 30 30 B
60. aximum open terminal voltage of tester in use must be less than 7 0V e Before checking harnesses turn ignition switch OFF and disconnect battery negative cable Revision January 2005 BRC 47 2004 Quest PRECAUTIONS VDC TCS ABS e Area to be repaired must be soldered and wrapped with tape Make sure that fraying of twisted wire is within 110 mm 4 33 in Soldered and wound with tape PKIA0306E e make a bypass connection to repaired area If the circuit is bypassed characteristics of twisted wire will be lost NG Bypass wire connection PKIA0307E Wiring Diagrams and Trouble Diagnosis When you read wiring diagrams refer to the following e Gl 12 How to Read Wiring Diagrams e PG 4 POWER SUPPLY ROUTING CIRCUIT When you perform trouble diagnosis refer to the following e Gl 10 HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES e Gl 25 How to Perform Efficient Diagnosis for an Electrical Incident EFS0035W Revision January 2005 BRC 48 2004 Quest PREPARATION VDC TCS ABS PFP 00002 PREPARATION Special Service Tool The actual shapes of Kent Moore tools may differ from those of special service tools illustrated here Tool number Kent Moore No Tool name J 45741 ABS active wheel sensor tester EFS005U5 Description Checking operation of ABS active wheel sen sors Commercial Service Tools Tool name EFS005U6 Descr
61. ayed MAP S C _ _ S C is selected for engine torque map TRQ MAP N A N A is selected for engine x Applicable Not applicable ACTIVE TEST CAUTION e Do not perform active test while driving e Make sure to completely bleed air from the brake system e The ABS and brake warning lamps turn on during the active test Operation Procedure 1 Connect the CONSULT II and CONSULT II CONVERTER to the data link connector and start the engine CAUTION If CONSULT II is used with no connection of CONSULT II CONVERTER malfunctions might be detected in self diagnosis depending on control unit which carry out CAN communication 2 Touch START NISSAN BASED VHCL on the display screen 3 Touch ABS If ABS is not indicated go to GI 37 CONSULT II Data Link Connector DLC Circuit 4 Touch ACTIVE TEST 5 The SELECT TEST ITEM screen is displayed 6 Touch necessary test item SELECT TEST ITEM FR RH SOL FR LH SOL REAR SOL ABS MOTOR LBR379 7 With the MAIN SIGNALS display selected touch START 8 The Active Test screen will be displayed so conduct the following test Solenoid Valve Operation Chart ABS solenoid valve ABS solenoid valve ACT Operation ACTUA ACTUA uR KEER DOWN UP TOR KEEP FR RH SOL FR RH IN SOL OFF ON ON OFF OFF OFF FR RH ABS SOLE NOID ACT FR RH OUT SOL OFF OFF ON OFF OFF OFF FRLH SOL FR LH IN SOL
62. ctor and the ECM connectors and check the terminals for deformation disconnection looseness or damage OK or NG OK GO TO 6 NG Repair or replace as necessary 6 CAN COMMUNICATION INSPECTION Check the CAN communication system Refer to BRC 36 CAN Communication System Inspection OK or NG OK gt gt INSPECTION END NG gt gt Refer to 6 CAN COMMUNICATION Revision January 2005 BRC 41 2004 Quest WHEEL SENSORS TCS ABS WHEEL SENSORS PFP 47910 Removal and Installation p SEC 476 e 21 2 1 15 Rear wheel sensor Front wheel sensor 0 21 2 1 15 S N m kg m 46 WFIA0146E CAUTION Be careful not to damage sensor edge and sensor rotor teeth When removing the front or rear wheel hub assembly first remove the ABS wheel sensor from the assembly Failure to do so may result in damage to the sensor wires making the sensor inoperative CAUTION Pull out the sensor being careful to turn it as little as possible Do not pull on the sensor harness Installation should be performed while paying attention to the following and then tighten the bolt to the specified torque e Before installing wheel sensor make sure no foreign materials such as iron fragments are adhered to the pick up part of the sensor to the inside of the sensor mounting hole or on the rotor mounting surface Revision January 2005 BRC 42 2004 Quest SENSOR ROTOR TCS ABS SENSOR ROTOR PFP 47970
63. ctuator and electric unit control unit Refer to BRC 97 Removal and Installation gt gt INSPECTION END Steering Angle Sensor System Inspection EFS0036 INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK Check self diagnosis results Self diagnosis results ST ANGLE SEN CIRCUIT ST ANGLE SEN SIGNAL Is the above displayed in the self diagnosis display items Yes gt gt GO TO 3 No gt gt GO TO 2 2 Conduct Data Monitor of the STEERING ANGLE SIGNAL to check if the status is normal Steering condition Data monitor Straight ahead 5deg 5deg Turn wheel 90 to the right Approx 90 Turn wheel 90 to the left Approx 90 OK or NG OK gt gt INSPECTION END NG gt gt GO 3 3 CONNECTOR INSPECTION 1 Disconnect the ABS actuator and electric unit control unit connector E125 and steering angle sensor M47 2 Check the terminals for deformation disconnection looseness or damage OK or NG OK GO TO 4 NG Repair or replace as necessary Revision January 2005 BRC 80 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS VDC TCS ABS 4 CHECKING STEERING ANGLE SENSOR POWER AND GROUND 1 Turn the ignition switch ON 2 Check voltage between steering angle sensor connector M47 and ground T S Steering angle sensor Body Measured value ange sns
64. ctuator and electric unit control unit connector E125 2 Check the terminals for deformation disconnection looseness or damage OK or NG OK gt gt GO 3 NG gt gt Repair or replace as necessary 3 ABS TCS VDC CONTROL UNIT POWER AND GROUND CIRCUIT INSPECTION Measure the voltage and continuity between the ABS actuator and electric unit control unit connector E125 and ground ABS actuator and electric unit Signal name control unit Ground Measured value connector E125 Power supply 45 GR Battery voltage Approx 12V 31 B Ground Continuity should exist 46 B OK or NG OK Check the battery for loose terminals low voltage etc Repair as necessary NG Repair the circuit Revision January 2005 BRC 86 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS VDC TCS ABS Brake Fluid Level Switch System Inspection EFSOOSGP INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK 1 Checkthe brake fluid reservoir fluid level If the level is low add brake fluid 2 Erase the self diagnosis results and check the self diagnosis results Self diagnosis results BR FLUID LEVEL LOW 15 the above displayed in the self diagnosis display items Yes gt gt GO TO 2 No INSPECTION END 2 CONNECTOR INSPECTION 1 Disconnect the ABS actuator and electric unit control unit connector E125 and brake fluid level switch connector E21 BRC 2 Checkthe terminals for def
65. d DISCONNECT connector M47 ground Approx 3 1 Y R 12V 3 G 12V WFIA0109E 3 Check resistance between steering angle sensor connector M47 and ground 54 T S Steering angle sensor Body Measured value connector M47 ground Steering angle sensor DISCONNECI 3 2 00 OK or NG OK Check the CAN communication system Refer to BRC 88 CAN Communication System Inspection If the CAN communication system is OK replace spiral cable steering angle sensor and adjust neutral position of WEIA0110E steering angle sensor Refer to BRC 94 Adjustment of Steering Angle Sensor Neutral Position NG gt gt Repair the circuit Yaw Rate Side Decel G Sensor System Inspection EFS00s6K CAUTION Sudden turns such as spin turns acceleration turns drifting etc when VDC function is OFF may cause the yaw rate side decel G sensor system to indicate a problem This is not a problem if normal operation can be resumed after restarting the engine INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK Check self diagnosis results Self diagnosis results YAW RATE SENSOR LONGITUDINAL G SENSOR LATERAL G SENSOR CAUTION When on a turntable such as at a parking structure entrance or when on a moving object with the engine running the VDC OFF indicator lamp might turn on and the self diagnosis using the CONSULT the yaw rate
66. de decel G sensor 3 Disconnect harness connector and remove the yaw rate side decel G sensor 74 72 5 2 D N m kg m 146 WFIAO151E INSTALLATION To install reverse the removal procedure CAUTION e drop or strike the yaw rate side decel G sensor Revision January 2005 BRC 100 2004 Quest
67. dified the VDC OFF indica tor lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly Components related to suspension shock absorbers struts springs bushings etc tires wheels exclude specified size components related to brake system pads rotors calipers components related to engine muffler ECM etc components related to body reinforcement roll bar tower bar etc e Driving with broken or excessively worn suspension components tires or brake system components may cause the VDC OFF indicator lamp and the SLIP indicator lamp to turn on and the VDC system may not operate properly e When the TCS or VDC is activated by sudden acceleration or sudden turn some noise may occur The noise is a result of the normal operation of the TCS and VDC e When driving on roads which have extreme slopes such as mountainous roads or high banks such as sharp curves on a freeway the VDC may not operate normally or the VDC warning lamp and the SLIP indicator lamp may turn on This is not a problem if normal operation can be resumed after restarting the engine e Sudden turns such as spin turns acceleration turns drifting etc with VDC turned off may cause the yaw rate side G sensor to indicate a problem This is not a problem if normal operation can be resumed after restarting the engine Precautions for CAN System EFs0035V e Do not apply voltage of 7 0V or higher to terminal to be measured e M
68. e cause of problem before replacing 2 CHECK ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT POWER SUPPLY CIRCUITS 1 Disconnect ABS actuator and electric unit control unit connector 2 Check voltage between ABS actuator and electric unit control unit connector terminal 1 B Y and ground and terminal 16 Y and ground 1 ABS actuat d electri Does battery voltage exist unit uni oy Yes gt gt GO TO cs 2 No Repair harness or connectors between fusible link and ABS actuator and electric unit control unit WFIA0116E CHECK ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT GROUND CIRCUIT Check continuity between ABS actuator and electric unit control unit connector terminal 31 B and ground and terminal 46 B and ground T S E ABS actuator and electric Does continuity exist unit control unit connector Yes gt gt Replace ABS actuator and electric unit control unit 51 46 Refer to BRC 97 Removal and Installation No gt gt Repair harness or connectors between ABS actuator and electric unit control unit and ground WFIA0112E ABS Warning Lamp Stays On When Ignition Switch Is Turned On EFSO036Y 1 CARRY OUT SELF DIAGNOSIS Carry out self diagnosis Refer to BRC 70 SELF DIAGNOSIS Are malfunctions detected in self diagnosis Yes gt gt Refer to BRC 73 Display List No Refer to DI 22 WARNING LAMPS
69. ehicle running 100 to 100 d s BRC 81 Yaw Rate Side Decel G Sensor System Inspection BRC 66 Revision January 2005 2004 Quest Monitor item TROUBLE DIAGNOSIS Display content Data monitor Condition Reference value in normal operation VDC TCS ABS Note Error inspection checklist SIDE G SENSOR Transverse G detected by side G sensor Vehicle stopped Approx 0 m s Vehicle running 16 7 to 16 7 m s BRC 81 Yaw Rate Side Decel G Sensor System Inspection Battery voltage sup plied to ABS actuator BRC 86 ABS TCS VDC Control Unit Power and BATTERY YOLI and electric unit con QE TON Ground Systems Inspec trol unit tion Brake pedal depressed ON BRC 85 Stop Lamp STOP LAMP SW Brake pedal operation Switch System Inspec Brake pedal not depressed OFF tion VDC OFF switch ON When VDC OFF indicator ON OFF SW VDC OFF switch lamp is ON BRC 88 VDC OFF ON OFF status VDC OFF switch OFF SWITCH When VDC OFF indicator OFF lamp is OFF ABS warning lamp ON ON BRC 92 ABS Warning ABS warning lamp ON Lamp Does Not Come condition Note 2 ABS warning lamp OFF OFF On When Ignition Switch Is Turned On Ignition switch ON or engine OFF room j running ABS not activated MOTOR RELAY Spes d Motor Relay and Circui
70. ellow and or orange harnesses or harness connectors Precautions for Brake System EFSO0S4M CAUTION e Refer to MA 10 RECOMMENDED FLUIDS AND LUBRICANTS for recommended brake fluid e Never reuse drained brake fluid careful not to splash brake fluid on painted areas it may cause paint damage If brake fluid is splashed on painted areas wash it away with water immediately To clean or wash all parts of master cylinder and disc brake caliper use clean brake fluid Never use mineral oils such as gasoline or kerosene They will ruin rubber parts of the hydraulic system e Use flare nut wrench when removing and installing brake tube e Ifa brake fluid leak is found the part must be disassembled without fail Then it has to be replaced with a new one if a defect exists the ignition switch OFF and remove the connector of the ABS actuator and electric unit control unit or the bat tery terminal before performing the work e Always tighten brake lines to specified torque when install ing e Burnish the brake contact surfaces after refinishing or replacing rotors after replacing pads or if a soft pedal occurs at very low mileage Refer to BR 31 Brake Burnishing front disc brakes or BR 37 Brake Burnishing rear disc brakes WARNING e Clean brake pads and shoes with a waste cloth then wipe with a dust collector Precautions When Using CONSULT II EFSoOsaN When connecting CONSULT II to data link connect
71. epending on control units carrying out CAN communica tion Therefor erase the self diagnosis results 5 Diagnose CAN communication system Refer to LAN 6 CAN COMMUNICATION Precautions for Brake Control EFSODUSU e During ABS operation the brake pedal may vibrate lightly and a mechanical noise may be heard This is normal e Just after starting vehicle the brake pedal may vibrate or a motor operating noise may be heard from engine compartment This is a normal status of operation check e Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough gravel or snow covered fresh deep snow roads e When an error is indicated by ABS or another warning lamp collect all necessary information from cus tomer what symptoms are present under what conditions and check for simple causes before starting diagnosis Besides electrical system inspection check booster operation brake fluid level and fluid leaks e If incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts stopping distance or steering stability may deteriorate elf there is a radio antenna or related wiring near control module ABS function may have a malfunction or error e f aftermarket parts car stereo CD player etc have been installed check for incidents such as harness pinches open circuits or improper wiring e the following components are replaced with non genuine components or mo
72. er ignition switch is turned ON when system is in normal operation and TCS function is not acti vated Note 3 SLIP indicator lamp ON OFF timing ON For approximately 2 seconds after ignition switch is turned ON or when a malfunction is detected and TCS function is activated while driving OFF Approximately 2 seconds after ignition switch is turned ON when system is in normal operation and TCS function is not acti vated Flashing TCS function is active during driving Revision January 2005 BRC 22 2004 Quest TROUBLE DIAGNOSIS TCS ABS CONSULT II Function ABS EFS00358 CONSULT II can display each diagnostic item using the diagnostic test modes shown following ABS diagnostic mode Description Supports inspection and adjustments Commands are transmitted to the ABS actuator and electric WORK SUPPORT unit control unit for setting the status suitable for required operation input output signals are received from the ABS actuator and electric unit control unit and received data is displayed SELF DIAG RESULTS Displays ABS actuator and electric unit control unit self diagnosis results DATA MONITOR Displays ABS actuator and electric unit control unit input output data in real time CAN DIAG SUPPORT MNTR The result of transmit receive diagnosis of CAN communication can be read ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them FUNCTION TEST 27
73. erase the error memory Refer to BRC 23 CONSULT II Function ABS Revision January 2005 BRC 20 2004 Quest TROUBLE DIAGNOSIS TCS ABS Warning Lamp and Indicator Timing EFS00866 Condition ABS ie One SHE Remarks warning lamp indicator lamp indicator lamp When the ignition switch is OFF After the ignition switch is turned i _ ON for approx 1 second After the ignition switch is turned _ _ Lamp goes off approx 2 seconds ON for approx 2 seconds after the engine is started When the TCS OFF switch is _ _ 2 pressed TCS function OFF x x TCS ABS malfunction When the TCS ABS control unit is x x malfunctioning power supply ground malfunction When the TCS is malfunctioning X ON OFF Control Unit Input Output Signal Standard REFERENCE VALUE FROM CONSULT II CAUTION EFS00357 The display shows the control unit calculation data so a normal value might be displayed even in the event the output circuit harness is open or short circuited Monitor item Display content Data monitor Condition Reference value in normal operation Note Error inspection checklist A T shift position N or P posi ON BRC 36 CAN Commu i i tion gt SLCT LVR POSI PNP switch signal ON nication System Inspec OFF condition A T shift position other than iion s OFF N and P pos
74. ernal malfunction of ABS actuator and electric unit control unit BRC 80 ABS TCS VDC Control Unit Inspection CAN COMM CIRCUIT U1000 e CAN communication line is open or shorted e ABS actuator and electric unit control unit internal malfunc tion e Battery voltage for ECM is suddenly interrupted for approxi mately 0 5 second or more BRC 88 CAN Commu nication System Inspec tion Note 2 LATERAL G SENSOR C1146 Revision January 2005 Lateral G sensor is malfunctioning or signal line of lateral G sen Sor is open or shorted BRC 72 BRC 81 Yaw Rate Side Decel G Sensor System Inspection 2004 Quest Self diagnostic item TROUBLE DIAGNOSIS Malfunction detecting condition VDC TCS ABS Check system BR FLUID LEVEL LOW C1155 Brake fluid level drops or circuit between ABS actuator and elec tric unit control unit and brake fluid level switch is shorted BRC 87 Brake Fluid Level Switch System Inspection ENGINE SIGNAL 1 ECM judges the communication between ABS TCS VDC control C1130 unit and ECM is abnormal ENGINE SIGNAL 2 ECM judges the communication between ABS TCS VDC control C1131 unit and ECM is abnormal ENGINE SIGNAL 3 ECM judges the communication between ABS TCS VDC control C1132 unit and ECM is abnormal ENGINE SIGNAL 4 ECM judges the communication between ABS TCS VDC control C1133 unit and ECM is abnormal
75. fusible link f and 40A fusible link for ABS actuator and electric unit control unit For fusible link layout refer to PG 4 POWER SUPPLY ROUTING CIRCUIT OK or NG OK gt gt GO TO 2 NG gt gt If fusible link is blown be sure to eliminate cause of problem before replacing 2 CHECK ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT POWER SUPPLY CIRCUITS 1 Disconnect ABS actuator and electric unit control unit connector 2 Check voltage between ABS actuator and electric unit control unit connector terminal 1 B Y and ground and terminal 15 Y and ground 1 ABS actuat d electri Does battery voltage exist unit Yes gt gt GO TO s 2 No Repair harness or connectors between fusible link and ABS actuator and electric unit control unit WFIA0115E CHECK ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT GROUND CIRCUIT Check continuity between ABS actuator and electric unit control unit connector terminal 16 B and ground and terminal 30 B and ground Does continuity exist CECI Yes gt gt Replace ABS actuator and electric unit control unit 716 30 Refer to BRC 44 Removal and Installation No gt gt Repair harness or connectors between ABS actuator and electric unit control unit and ground WFIA0098E ABS Warning Lamp Stays On When Ignition Switch Is Turned On 5 1 CARRY OUT SELF DIAGNOSIS
76. go to CAUTION GI 37 CONSULT II Data Link Connector DLC Circuit When START NISSAN BASED VHCL is touched immediately after starting the engine or turning on the ignition switch ABS might not be displayed in the SELECT SYSTEM screen In this case repeat the operation from step 2 3 Return to the SELECT MONITOR ITEM screen and touch ECU INPUT SIGNALS MAIN SIGNALS or SELECTION FROM MENU Refer to the following information 4 When START is touched the data monitor screen is displayed Display Item List 1 Data monitor item selection em Unit ECU INPUT MAIN SELECTION Remarks SIGNALS SIGNALS FROM MENU Gear position judged by PNP GEAR switch signal is displayed Wheel speed calculated by front i RH wheel sensor signal is dis played Revision January 2005 BRC 73 2004 Quest TROUBLE DIAGNOSIS VDC TCS ABS Data monitor item selection tem Unit ECU INPUT MAIN SELECTION Remarks SIGNALS SIGNALS FROM MENU FR LH SENSOR Wheel speed calculated by front LH km h MPH wheel sensor signal is displayed RR RH SENSOR Wheel speed calculated by rear RH km h MPH wheel sensor signal is displayed RR LH SENSOR M Wheel speed calculated by rear LH km h MPH wheel sensor signal is displayed Voltage supplied to ABS actuator VORI x x x and electric unit
77. he Fail Safe function is activated the EBD and ABS become inoper ative and the ABS warning lamp and BRAKE warning lamp are turned on The electrical system can be diagnosed using CONSULT II During EBD operation the brake pedal may vibrate lightly and a mechanical noise may be heard This is normal e Just after starting the vehicle the brake pedal may vibrate or a motor operating noise may be heard from engine compartment This is a normal status of operation check TCS Function EFSODS4W e Spinning of the drive wheels is detected by the ABS TCS control unit using inputs from the wheel speed sensors If wheel spin occurs engine fuel cut is conducted while the throttle value is restricted to reduce the engine torque and decrease the amount of wheel spin In addition the throttle opening is controlled to achieve the optimum engine torque e Depending on road condition the vehicle may have a sluggish feel This is normal because optimum trac tion has the highest priority during TCS operation Revision January 2005 BRC 7 2004 Quest SYSTEM DESCRIPTION TCS ABS TCS may be activated during sudden vehicle acceleration wide open throttle acceleration sudden trans mission shifts or when the vehicle is driven on a road with a varying surface friction coefficient e The SLIP indicator lamp flashes to inform the driver of TCS operation Wheel Sensors Each wheel sensor unit consists of a wheel hub with a series of inter nal
78. ifficult to diagnose a problem that occurs intermit tently rather than continuously Most intermittent problems are caused by poor electrical connections or faulty wiring In this case careful checking of suspicious circuits may help prevent the replace ment of good parts A visual check only may not find the cause of the problem so a road test should be performed Before undertaking actual checks take just a few minutes to talk with a customer who approaches with an ABS TCS complaint The cus tomer is a very good source of information on such problems espe cially intermittent ones Through the talks with the customer find out what symptoms are present and under what conditions they occur Start your diagnosis by looking for conventional problems first This is one of the best ways to troubleshoot brake problems on an ABS TCS equipped vehicle Also check related Service Bulletins for infor mation SEF234G Revision January 2005 BRC 11 2004 Quest WORK FLOW YES TROUBLE DIAGNOSIS Inspection start Locate trouble area using diagnostic worksheet Review INTRODUCTION in How to Perform Trouble Diagnosis for Quick and Accurate Repair Perform Basic Inspection Do ABS warning lamp SLIP indicator lamp and TCS OFF indicator lamp light TCS ABS Refer to CAN COMMUNICATION Does ABS appear on CONSULT II sme e in LAN section Y YES
79. imary side ABS actuator and electric unit control unit SYSTEM DESCRIPTION p Master cylinder Secondary side TCS ABS EFS0034Z Inlet solenoid valve o D lt Return check valve X Damper Pump Inlet valve Reservoir lt Outlet valve lt gt Damper Return check valve EN Inlet solenoid valve gt Reservoir Front LH Rear RH caliper caliper Revision January 2005 Outlet solenoid valve Front RH caliper BRC 9 Rear LH caliper 3 Outlet solenoid valve WFIA0280E 2004 Quest CAN COMMUNICATION TCS ABS CAN COMMUNICATION PFP 23710 System Description 0080 Refer to LAN 6 CAN COMMUNICATION Revision January 2005 BRC 10 2004 Quest TROUBLE DIAGNOSIS TCS ABS TROUBLE DIAGNOSIS PFP 00000 How to Perform Trouble Diagnoses for Quick and Accurate Repair INTRODUCTION The ABS TCS system has an electronic control unit to control major functions The control unit accepts input signals from sensors and controls actuator operation It is also important to check for conven tional problems such as air leaks in the booster or lines lack of brake fluid or other problems with the brake system It is much more d
80. inuity Connector terminal Wire color Connector terminal Wire color Front LH E125 14 G E18 1 G E125 13 R E18 2 R Front RH E125 26 B E117 1 B E125 27 117 2 Yes Rear LH E125 29 P 8123 1 E125 28 L 123 2 L Rear RH E125 11 V 8122 1 V E125 12 LG B122 2 LG Continuity should exist OK or NG OK Replace the ABS actuator and electric unit control unit Refer to BRC 97 Removal and Installa tion NG Repair the circuit Engine System Inspection EFSQO30H INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK Check self diagnosis results Self diagnosis results ENGINE SIGNAL 1 ENGINE SIGNAL 2 ENGINE SIGNAL 3 ENGINE SIGNAL 4 ENGINE SIGNAL 5 ENGINE SIGNAL 6 15 the above displayed in the self diagnosis display items Yes gt gt GO TO 2 No INSPECTION END 2 ENGINE SYSTEM INSPECTION 1 Perform ECM self diagnosis and repair as necessary 2 Perform ABS actuator and electric unit control unit self diagnosis again OK or NG OK INSPECTION END NG Repair or replace as necessary Revision January 2005 BRC 79 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS VDC TCS ABS ABS TCS VDC Control Unit Inspection INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK Check self diagnosis results Self diagnosis results CONTROLLER FAILURE 15 the above displayed in the self diagnosis display items Yes gt gt Replace ABS a
81. ion Erin NOTE The front wheel sensor rotor is built into the front wheel hub For removal and installation procedure refer to RAX 6 Removal and Installation NOTE The rear wheel sensor rotor is built into the rear wheel hub For removal and installation procedure refer to RAX 6 Removal and Installation Revision January 2005 BRC 96 2004 Quest ACTUATOR AND ELECTRIC UNIT ASSEMBLY VDC TCS ABS ACTUATOR AND ELECTRIC UNIT ASSEMBLY PFP 47660 Removal and Installation 21 2 1 15 kg m in Ib 0 N m kg m ft Ib WFIA0279E 1 To left front 2 To rear right 3 To rear left 4 To front right 5 From the master cylinder secondary side 6 From the master cylinder primary side 7 ABS actuator and electric unit control 8 Harness connector unit REMOVAL 1 Disconnect the negative battery terminal 2 Remove the cowl top extension Refer to El 18 Removal and Installation 3 Drain the brake fluid Refer to BR 11 Changing Brake Fluid 4 Disconnect the actuator harness from the ABS actuator and electric unit control unit CAUTION e To remove the brake tubes use a flare nut wrench to prevent the flare nuts and brake tubes from being damaged e Be careful not to splash brake fluid on painted areas 5 Disconnect the brake tubes 6 Remove the two bolts and then the ABS actuator and electric unit control unit Revision January 2005 BRC 97 200
82. iption 1 Flare nut crowfoot Removing and installing brake piping 2 Torque wrench a 10mm 0 39 in 12mm 0 47 in S NT360 Revision January 2005 BRC 49 2004 Quest SYSTEM DESCRIPTION VDC TCS ABS SYSTEM DESCRIPTION PFP 00000 System Components 500352 Primary side VDC switch over valve 1 SV 1 Primary side VDC switch over valve 1 CV 1 YAW RATE SIDE DECEL SENSOR Secondary side VDC switch over valve 2 SV 2 STEERING ANGLE SENSOR Secondary side VDC switch over valve 2 CV 2 Front RH wheel inlet solenoid valve Data link connector for CONSULT II Trouble diagnosis Front RH wheel outlet solenoid valve circuit Front LH wheel inlet solenoid valve POUL ALINE CHC neon Front LH wheel outlet solenoid valve Rear RH wheel inlet solenoid valve Front LH wheel sensor Control circuit I Rear RH wheel outlet solenoid valve Fail safe circuit Rear RH wheel sensor Rear LH wheel inlet solenoid valve Rear LH wheel outlet solenoid valve Rear LH wheel sensor Motor CAN communication circuit Motor relay Actuator relay ABS actuator and electric unit control unit WFIAO161E ABS Function EFSO0360 e The Anti Lock Brake System detects wheel revolution whi
83. ir or replace the terminal 2 Reconnect connector to perform self diagnosis 15 COMM CIRCUIT displayed in the self diagnosis display items Yes gt gt Print out the self diagnosis results and refer to 6 COMMUNICATION No Connector terminal connection is loose damaged open or shorted Component Inspection EFS0036R VDC OFF SWITCH e Check the continuity between terminals 1 and 2 Ead 1 2 Continuity should exist when pushing the 15 VDE switch connector switch 4131211 Continuity should not exist when releasing the switch PFIA0307E Revision January 2005 BRC 88 2004 Quest TROUBLE DIAGNOSES FOR SYMPTOMS VDC TCS ABS TROUBLE DIAGNOSES FOR SYMPTOMS 99999 ABS Works Frequently 500365 1 CHECK WARNING LAMP ACTIVATION Make sure warning lamp remains off while driving OK or NG OK gt gt GO 2 NG Carry out self diagnosis Refer to BRC 70 SELF DIAGNOSIS 2 CHECK WHEEL SENSORS Check the following e Wheel sensor mounting for looseness e Wheel sensors for physical damage e Wheel sensor connectors for terminal damage or loose connections OK or NG OK gt gt GO 3 gt gt Repair or replace as necessary CHECK FRONT AXLE Check front and rear axles for excessive looseness Refer to FAX 5 FRONT WHEEL BEARING or RAX 5 REAR WHEEL BEARING OK or NG OK GO
84. ir or replace the malfunctioning component Start engine and drive at approximately 30 km h 19 MPH or more for approximately 1 minute CAUTION e When a wheel sensor short circuit is detected if the vehicle is not driven at 30 km h 19 MPH or more for at least 1 minute the ABS warning lamp will not turn off even if the malfunction is repaired Turn ignition switch OFF to prepare for erasing the memory Start the engine and touch START NISSAN BASED VHCL ABS SELF DIAG RESULTS ERASE in order on the CONSULT II screen to erase the error memory If ABS is not indicated go to GI 37 CONSULT II Data Link Connector DLC Circuit CAUTION If the error memory is not erased re conduct the operation from step 4 For the final inspection drive at approximately 30 km h 19 MPH or more for approximately 1 minute and confirm that the ABS warning lamp and SLIP indicator lamp turn off Revision January 2005 BRC 24 2004 Quest Display Item List Self diagnostic item TROUBLE DIAGNOSIS Malfunction detecting condition TCS ABS Check system FR LH SENSOR 1 C1104 Circuit of front LH wheel sensor is open RR RH SENSOR 1 C1101 Circuit of rear RH wheel sensor is open FR RH SENSOR 1 C1103 Circuit of front RH wheel sensor is open RR LH SENSOR 1 C1102 Circuit of rear LH wheel sensor is open FR LH SENSOR 2 C1108 Circuit of front LH wheel sensor is shorted or se
85. is acti vated while driving OFF Approximately 2 seconds after ignition switch is turned ON when system is in normal operation and TCS VDC function is not activated Flashing TCS VDC function is active during driving Revision January 2005 BRC 68 2004 Quest TROUBLE DIAGNOSIS VDC TCS ABS CONSULT II Function ABS zm CONSULT II can display each diagnostic item using the diagnostic test modes shown following ABS diagnostic mode Description Supports inspection and adjustments Commands are transmitted to the ABS actuator and electric WORK SUPPORT unit control unit for setting the status suitable for required operation input output signals are received from the ABS actuator and electric unit control unit and received data is displayed SELF DIAG RESULTS Displays ABS actuator and electric unit control unit self diagnosis results DATA MONITOR Displays ABS actuator and electric unit control unit input output data in real time CAN DIAG SUPPORT MNTR The result of transmit receive diagnosis of CAN communication can be read ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them FUNCTION TEST 27 by CONSULT II instead of a technician to determine whether each system is OK ECU PART NUMBER ABS actuator and electric unit control unit part number can be read CONSULT II BASIC OPERATION PROCEDURE 1 Turn ignition switch OFF 2 Connect CONSULT II CONSULT
86. itions 1st gear 1 2nd gear 2 BRC 36 CAN Commu GEAR A T gear position nication System Inspec 3rd gear 3 tion 4th gear 4 Vehicle stopped 0 km h MPH FR RH SENSOR FR LH SENSOR Almost accor BRC 30 Wheel Sensor Wheel speed dance with speed RR RH SENSOR RR LH SENSOR Vehicle running Note 1 ometer display within 10 System Inspection Accelerator pedal not Open close condition depressed ignition switch is 0 BRC 36 CAN Commu ACCEL POS SIG of throttle valve linked ON nication System Inspec with accelerator pedal Depress accelerator pedal tion 010 100 ignition switch is ON With engine stopped 0 rpm ENGINE SPEED With engine running Engine running Almost in accor dance with tachometer display BRC 31 Engine System Inspection BATTERY VOLT Battery voltage sup plied to ABS actuator and electric unit con trol unit Revision January 2005 Ignition switch ON BRC 21 10 to 16V BRC 35 ABS TCS Con trol Unit Power and Ground Systems Inspec tion 2004 Quest Monitor item TROUBLE DIAGNOSIS Display content Data monitor Condition Reference value in normal operation TCS ABS Note Error inspection checklist STOP LAMP SW Brake pedal operation Brake pedal depressed ON BROC 34 Stop Lamp Switch System Inspec
87. l e TEST IS STOPPED is displayed approximately 10 seconds MODE BACK iG 5 after operation starts Revision January 2005 BRC 29 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS TCS ABS TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS PFP 00000 Wheel Sensor System Inspection INSPECTION PROCEDURE 1 CONNECTOR INSPECTION Disconnect the ABS actuator and electric unit connector E125 and wheel sensor of malfunctioning code Check the terminals for deformation disconnection looseness or damage OK or NG OK gt gt 2 gt gt Repair or replace as necessary 2 CHECK WHEEL SENSOR OUTPUT SIGNAL 1 Connect ABS active wheel sensor tester J 45741 to wheel sensor using appropriate adapter 2 on the ABS active wheel sensor tester power switch NOTE The green POWER indicator should illuminate If the POWER indicator does not illuminate replace the battery in the ABS active wheel sensor tester before proceeding 3 Spin the wheel of the vehicle by hand and observe the red SENSOR indicator on the ABS active wheel sensor tester The red SENSOR indicator should flash on and off to indicate an output signal NOTE If the red SENSOR indicator illuminates but does not flash reverse the polarity of the tester leads and retest Does the ABS active wheel sensor tester detect a signal Yes gt gt GOTO3 No gt gt Replace wheel sensor Refer to BRC 42 Removal and Installation
88. l outlet solenoid valve 4 Front LH wheel sensor Rear RH wheel sensor Fail safe circuit Rear LH wheel inlet solenoid valve Rear LH wheel sensor M D DE Rear LH wheel outlet solenoid valve 3 Actuator relay ABS actuator and control unit WFIA0118E ABS Function Anti Lock Brake System detects wheel revolution while braking and improves handling stability during sudden braking by electrically preventing wheel lockup Maneuverability is also improved for avoiding obstacles e electrical system malfunctions the Fail Safe function is activated the ABS becomes inoperative and the ABS warning lamp turns on The electrical system can be diagnosed using CONSULT II During ABS operation the brake pedal may vibrate lightly and a mechanical noise may be heard This is normal e Just after starting the vehicle the brake pedal may vibrate or a motor operating noise may be heard from engine compartment This is a normal status of operation check e Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough gravel or snow covered fresh deep snow roads EBD Function EFSQ0S4V e Electronic Brake Distribution is a function that detects subtle slippages between the front and rear wheels during braking and it improves handling stability by electronically controlling the brake fluid pressure which results in reduced rear wheel slippage e If the electrical system malfunctions t
89. le braking and improves handling stability during sudden braking by electrically preventing wheel lockup Maneuverability is also improved for avoiding obstacles e Ifthe electrical system malfunctions the Fail Safe function is activated the ABS becomes inoperative and the ABS warning lamp turns on The electrical system can be diagnosed using CONSULT II During ABS operation the brake pedal may vibrate lightly and a mechanical noise may be heard This is normal e Just after starting the vehicle the brake pedal may vibrate or a motor operating noise may be heard from engine compartment This is a normal status of operation check e Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough gravel or snow covered fresh deep snow roads EBD Function EFSp0361 e Electronic Brake Distribution is a function that detects subtle slippages between the front and rear wheels during braking and it improves handling stability by electronically controlling the brake fluid pressure which results in reduced rear wheel slippage e If the electrical system malfunctions the Fail Safe function is activated the EBD and ABS become inoper ative and the ABS warning lamp and BRAKE warning lamp are turned on The electrical system can be diagnosed using CONSULT II During EBD operation the brake pedal may vibrate lightly and a mechanical noise may be heard This is normal e Just after starting the vehicle the brake pedal
90. ll turn on In case of an electrical malfunction with the EBD system the BRAKE warning lamp ABS warning lamp VDC OFF indicator lamp and SLIP indicator lamp will turn on The system will revert to one of the following conditions of the Fail Safe function 1 For ABS malfunction only the EBD is operative and the condition of the vehicle is the same condition of vehicles without ABS TCS VDC system 2 For EBD malfunction the EBD and ABS become inoperative and the condition of the vehicle is the same as the condition of vehicles without ABS TCS VDC or EBD system VDC TCS SYSTEM In case of TCS VDC system malfunction the VDC OFF indicator lamp and SLIP indicator lamp are turned on and the condition of the vehicle is the same as the condition of vehicles without TCS VDC system In case of an electrical malfunction with the TCS VDC system the ABS control continues to operate normally without TCS VDC control Revision January 2005 BRC 52 2004 Quest SYSTEM DESCRIPTION VDC TCS ABS Hydraulic Circuit Diagram EFS00366 Co Master cylinder Primary side Secondary side Primary side VDC switch over valve 1 CV1 ABS actuator and electric unit control unit Primary side VDC switch over Secondary side VDC switch over valve 1 SV1 Bs cneok Pre valve 2 SV2 valve L X Inlet solenoid Outlet valve Damper 0 0 Damper Secondary side VDC switch over valve 2 CV2 Inlet solenoid valve
91. ltiple malfunctions are detected including CAN communication line U1000 perform diagnosis for CAN communication line first Note 3 ACTUATOR RLY on the CONSULT II self diagnosis results indicates the malfunction of the actuator motor relay or circuit DATA MONITOR Operation Procedure 1 3 4 After turning OFF the ignition switch connect CONSULT II and the CONSULT II CONVERTER to the data link connector CAUTION If CONSULT II is used with no connection of CONSULT II CONVERTER malfunctions might be detected in self diagnosis depending on control unit which carry out CAN communication Touch START NISSAN BASED VHCL ABS DATA MONITOR in order on the CONSULT II screen If ABS is not indicated go to GI 37 CONSULT II Data Link Connector DLC Circuit CAUTION When START NISSAN BASED is touched immediately after starting the engine or turning on the ignition switch ABS might not be displayed in the SELECT SYSTEM screen In this case repeat the operation from step 2 Return to the SELECT MONITOR ITEM screen and touch ECU INPUT SIGNALS MAIN SIGNALS SELECTION FROM MENU Refer to the following information When START is touched the data monitor screen is displayed Display Item List Data monitor item selection Item k Unit ECU INPUT MAIN SELECTION Remarks SIGNALS SIGNALS FROM MENU GEAR Y Gear position judged by PNP switch signal is
92. n switch OFF and remove the connector of the ABS actuator and electric unit control unit or the bat tery terminal before performing the work e Always tighten brake lines to specified torque when install ing e Burnish the brake contact surfaces after refinishing or replacing rotors after replacing pads or if a soft pedal occurs at very low mileage Refer to BR 31 Brake Burnishing front disc brake BR 37 Brake Burnishing rear disc brake WARNING e Clean brake pads and shoes with a waste cloth then wipe with a dust collector Precautions When Using CONSULT II EFS00s6T When connecting CONSULT II to data link connector connect them through CONSULT II CONVERTER CAUTION If CONSULT II is used with no connection of CONSULT II CONVERTER malfunctions might be detected in self diagnosis depending on control unit which carry out CAN communication CHECK POINTS FOR USING CONSULT II 1 Has CONSULT II been used without connecting CONSULT II CONVERTER on this vehicle e If YES GO TO 2 Revision January 2005 BRC 46 2004 Quest Commercial service tool SBR686C PRECAUTIONS VDC TCS ABS e If NO GO TO 5 2 Is there any indication other than indications relating to CAN communication system in the self diagnosis results e If YES GO TO e If NO GO TO 4 3 Based on self diagnosis results unrelated to CAN communication carry out the inspection 4 Malfunctions may be detected in self diagnosis d
93. nsor power volt age is unusual ABS actuator and electric unit control unit can not identify sensor pulses because of large gap between wheel sensor and sensor rotor FR RH SENSOR 2 C1107 Circuit of front RH wheel sensor is shorted or sensor power volt age is unusual ABS actuator and electric unit control unit can not identify sensor pulses because of large gap between wheel sensor and sensor rotor RR LH SENSOR 2 C1106 Circuit of rear LH wheel sensor is shorted or sensor power volt age is unusual ABS actuator and electric unit control unit can not identify sensor pulses because of large gap between wheel sensor and sensor rotor BRC 78 Wheel Sensor System Inspection Note 1 STOP LAMP SW 1 C1116 Stop lamp switch or circuit malfunction BRC 85 Stop Lamp Switch System Inspec tion ST ANGLE SEN CIRCUIT C1143 C1163 Neutral position of steering angle sensor is dislocated or steer ing angle sensor is malfunctioning BRC 80 Steering Angle Sensor System Inspec tion YAW RATE SENSOR C1145 Revision January 2005 Yaw rate sensor has generated an error or yaw rate sensor sig nal line is open or shorted BRC 71 BRC 81 Yaw Rate Side Decel G Sensor System Inspection 2004 Quest Self diagnostic item TROUBLE DIAGNOSIS Malfunction detecting condition VDC TCS ABS Check system FR LH IN ABS SOL C1120 Circ
94. nsor power volt age is unusual ABS actuator and electric unit control unit can not identify sensor pulses because of large gap between wheel sensor and sensor rotor RR RH SENSOR 2 C1105 Circuit of rear RH wheel sensor is shorted or sensor power volt age is unusual ABS actuator and electric unit control unit can not identify sensor pulses because of large gap between wheel sensor and sensor rotor FR RH SENSOR 2 C1107 Circuit of front RH wheel sensor is shorted or sensor power volt age is unusual ABS actuator and electric unit control unit can not identify sensor pulses because of large gap between wheel sensor and sensor rotor RR LH SENSOR 2 C1106 Circuit of rear LH wheel sensor is shorted or sensor power volt age is unusual ABS actuator and electric unit control unit can not identify sensor pulses because of large gap between wheel sensor and sensor rotor BRC 30 Wheel Sensor System Inspection Note 1 FR LH IN ABS SOL C1120 Circuit of front LH IN ABS solenoid is open or shorted or control line is open or shorted to power supply or ground FR LH OUT ABS SOL C1121 Circuit of front LH OUT ABS solenoid is open or shorted or con trol line is open or shorted to power supply or ground RR RH IN ABS SOL C1126 Circuit of rear RH IN ABS solenoid is open or shorted or control line is open or shorted to power supply or ground RR RH OUT ABS SOL C1
95. omer is a very good source of information on such problems especially intermittent ones Through the talks with the customer find out what symptoms are present and under what conditions they occur Start your diagnosis by looking for conventional problems first This is one of the best ways to troubleshoot brake problems on an ABS TCS VDC equipped vehicle Also check related Service Bulletins for information SEF234G Revision January 2005 BRC 55 2004 Quest WORK FLOW YES TROUBLE DIAGNOSIS Inspection start Locate trouble area using diagnostic worksheet Review INTRODUCTION in How to Perform Trouble Diagnosis for Quick and Accurate Repair Perform Basic Inspection Do ABS warning lamp SLIP indicator lamp and VDC OFF indicator lamp light 5 5 Refer to CAN COMMUNICATION Does ABS appear on CONSULT II sme e in LAN section Y YES Perform self diagnostic procedures 3 NO M Y Perform diagnostic procedure for symptom Check or repair malfunctioning part gt Y NG aU NEC GL 407 Perform self diagnostic procedures san J OK Revision January 2005 Erase self diagnostic results then drive vehicle more than minute at 30 km h 19 MPH or more Perform self diagnostic procedures again Inspection end B
96. on and off to indicate an output signal NOTE If the red SENSOR indicator illuminates but does not flash reverse the polarity of the tester leads and retest Does the ABS active wheel sensor tester detect a signal Yes gt gt GO 3 No gt gt Replace the wheel sensor Refer to BRC 95 Removal and Installation 3 CHECK TIRES Check for inflation pressure wear and size of each tire Are tire pressure and size correct and is tire wear within specifications Yes GO TO 4 No Adjust tire pressure or replace tire s 4 CHECK WHEEL BEARINGS Check wheel bearing axial end play Refer to FAX 5 FRONT WHEEL BEARING or RAX 5 HEAR WHEEL BEARING OK or NG OK gt gt TO 5 NG gt gt Repair or replace as necessary Refer to FAX 5 FRONT WHEEL BEARING or RAX 5 REAR WHEEL BEARING 5 CHECK WIRING HARNESS FOR SHORT CIRCUIT Check resistance between wheel sensor harness connector terminals and ground Continuity should not exist OK or NG OK gt gt GO TO 6 NG Repair the circuit Revision January 2005 BRC 78 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS VDC TCS ABS 6 CHECK WIRING HARNESS FOR OPEN CIRCUIT 1 Check continuity between ABS actuator and electric unit control unit harness connector and wheel sen sor harness connector ABS actuator and 27 Wheel sensor electric unit control unit Wheel sensor Cont
97. or connect them through CONSULT II CONVERTER CAUTION If CONSULT II is used with no connection of CONSULT II CONVERTER malfunctions might be detected in self diagnosis depending on control unit which carry out CAN communication CHECK POINTS FOR USING CONSULT II 1 Has CONSULT II been used without connecting CONSULT II CONVERTER on this vehicle e YES GO TO 2 Revision January 2005 BRC 3 2004 Quest Commercial service tool SBR686C PRECAUTIONS TCS ABS e If GO TO 5 2 15 there any indication other than indications relating to CAN communication system in the self diagnosis results e If YES GO TO 3 e If NO GO TO 4 3 Based on self diagnosis results unrelated to CAN communication carry out the inspection 4 Malfunctions may be detected in self diagnosis depending on control units carrying out CAN communica tion Therefor erase the self diagnosis results 5 Diagnose CAN communication system Refer to LAN 6 CAN COMMUNICATION Precautions for Brake Control EFS00840 e During ABS operation the brake pedal may vibrate lightly and a mechanical noise may be heard This is normal e Just after starting vehicle the brake pedal may vibrate or a motor operating noise may be heard from engine compartment This is a normal status of operation check e Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough gravel or snow covered fresh deep snow roads
98. ormation disconnection looseness or damage OK or NG OK gt gt GO 3 gt gt Repair or replace as necessary 3 CHECK THE HARNESS BETWEEN THE BRAKE FLUID LEVEL SWITCH AND THE ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT Check the continuity between the brake fluid level switch connector E21 and the ABS actuator and electric unit control unit connector E125 ABS actuator and Brake fluid level electric unit control switch connector Continuity unit connector E125 E21 38 SB SB Continuity should exist 38 SB Ground Continuity should not exist Ground B Continuity should exist OK or NG OK gt gt GO TO 4 NG gt gt Repair the circuit 4 CHECK BRAKE FLUID LEVEL SWITCH Check continuity between brake fluid level switch terminals and Continuity should not exist OK or NG OK gt gt Perform self diagnosis again If the same results appear replace ABS actuator and electric unit control unit Refer to BRC 97 Removal and Installation NG Replace brake fluid level switch Revision January 2005 BRC 87 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS VDC TCS ABS CAN Communication System Inspection FS00360 INSPECTION PROCEDURE 1 CHECK CONNECTOR 1 Turn ignition switch OFF disconnect the ABS actuator and electric unit control unit connector and check the terminal for deformation disconnection looseness and so on If there is a malfunction repa
99. ower supply or ground SV1 Front side VDC switch over solenoid valve suction valve is C1166 open or shorted or control line is open or shorted to power sup ply or ground Rear side VDC switch over solenoid valve suction valve is open C1167 or shorted or control line is open or shorted to power supply or ground BRC 83 Solenoid and VDC Change Over Valve PUMP MOTOR Note 3 C1111 During actuator motor operation with ON when actuator motor turns OFF or when control line for actuator motor relay is open During actuator motor operation with OFF when actuator motor turns ON or when control line for relay is shorted to ground BRC 84 Actuator Motor Motor Relay and Circuit Inspection BATTERY VOLTAGE ABNORMAL C1109 ABS actuator and electric unit control unit power voltage is too low BRC 86 ABS TCS VDC Control Unit Power and Ground Systems Inspection ST ANGLE SEN SIGNAL C1144 Neutral position correction of steering angle sensor is not fin ished ST ANG SEN COM CIR C1156 CAN communication line or steering angle sensor has generated an error BRC 80 Steering Angle Sensor System Inspec tion LONGITUDINAL G SENSOR C1113 Longitudinal G sensor is malfunctioning or signal line of longitu dinal G sensor is open or shorted BRC 81 Yaw Rate Side Decel G Sensor System Inspection CONTROLLER FAILURE C1110 Int
100. position then stop 8 Select DATA MONITOR SELECTION FROM MENU and STR ANGLE SIG CONSULT II screen Then check that STR ANGLE SIG is within 0 2 5 deg If value is more than specification repeat steps 1 to 5 9 Erase memory of ABS actuator and electric unit control unit and ECM 10 Turn ignition switch to OFF SFIA0371E Revision January 2005 BRC 94 2004 Quest WHEEL SENSORS VDC TCS ABS WHEEL SENSORS PFP 47910 Removal and Installation SEC 476 e 21 2 1 15 Rear wheel sensor Front wheel sensor 0 21 21 15 S N m kg m 46 WFIA0146E CAUTION Be careful not to damage sensor edge and sensor rotor teeth When removing the front or rear wheel hub assembly first remove the ABS wheel sensor from the assembly Failure to do so may result in damage to the sensor wires making the sensor inoperative CAUTION Pull out the sensor being careful to turn it as little as possible Do not pull on the sensor harness Installation should be performed while paying attention to the following and then tighten the bolt to the specified torque e Before installing wheel sensor make sure no foreign materials such as iron fragments are adhered to the pick up part of the sensor to the inside of the sensor mounting hole or on the rotor mounting surface Revision January 2005 BRC 95 2004 Quest SENSOR ROTOR VDC TCS ABS SENSOR ROTOR PFP 47970 Removal and Installat
101. r lamp and VDC OFF indicator lamp turn off approximately 2 seconds after the engine is started If ABS warning lamp SLIP indicator lamp or VDC OFF indicator lamp have not turned off 10 seconds after the engine has been started conduct self diagnosis of the ABS actu ator and electric unit control unit After conducting the self diagnosis be sure to erase the error memory Refer to BRC 69 CONSULT II Function ABS Revision January 2005 BRC 65 2004 Quest TROUBLE DIAGNOSIS X ON OFF Control Unit Input Output Signal Standard REFERENCE VALUE FROM CONSULT II CAUTION VDC TCS ABS Warning Lamp and Indicator Timing EFSOO36D Condition ADS SHE Remarks warning lamp indicator lamp indicator lamp When the ignition switch is OFF E After the ignition switch is turned gt ON for approx 1 second After the ignition switch is turned _ _ Lamp goes off approx 2 seconds ON for approx 2 seconds after the engine is started When the VDC OFF switch is _ gt _ E pressed VDC function OFF x x x md ABS TCS VDC malfunction When the ABS TCS VDC control x x unit is malfunctioning power ply or ground malfunction When the VDC is malfunctioning 50036 The display shows the control unit calculation data so normal value might be displayed even in event the output circuit harness is open or short circuited Monitor item
102. ral Posi WORK FLOW 56 eom t ei e n ree RE Seabee 94 CLARIFY CONCERN eee 57 WHEEL SENSORS cessere 95 EXAMPLE OF DIAGNOSIS SHEET 57 Removal and Installation 95 ComponentParts and Harness ConnectorLocation 58 SENSOR ROTOR 96 59 Removal and Installation 96 Wiring Diagram 60 ACTUATOR AND ELECTRIC UNIT ASSEMBLY 97 Basic Inspection eene 65 Removal and Installation 97 BRAKE FLUID LEVEL FLUID LEAK AND REMOVA tte tente siete 97 BRAKE PAD INSPECTION 65 INSTALLATION 98 POWER SYSTEM TERMINAL LOOSENESS STEERING ANGLE SENSOR 99 AND BATTERY INSPECTION 65 Removal and Installation 99 ABS WARNING LAMP SLIP INDICATOR LAMP SENSOR 100 AND VDCOFFINDICATORLAMP INSPECTION 65 Removal and Installation 100 Warning Lamp and Indicator Timing 66 REMOVAL ens 100 Control Unit Input Output Signal Standard 66 INSTALLATION 100 Revision January 2005
103. s as follows Operation Procedure 1 2 gt 11 Turn ignition switch OFF Connect CONSULT Il and CONSULT II CONVERTER to the data link connector CAUTION If CONSULT II is used with no connection of CONSULT II CONVERTER malfunctions might be detected in self diagnosis depending on control unit which carry out CAN communication Turn ignition switch ON Start engine and drive at approximately 30 km h 19 MPH or more for approximately 1 minute After stopping the vehicle with the engine running touch START NISSAN BASED VHCL ABS SELF DIAG RESULTS in order on the CONSULT II screen CAUTION If START NISSAN BASED is touched immediately after starting the engine or turning on the ignition switch ABS might not be displayed in the SELECT SYSTEM screen In this case repeat the operation from step 1 The self diagnostic results are displayed If necessary the self diagnostic results can be printed out by touching e When NO DTC IS DETECTED is displayed check the ABS warning lamp SLIP indicator lamp and VDC OFF indicator lamp Conduct the appropriate inspection from the display item list and repair or replace the malfunctioning component Start engine and drive at approximately 30 km h 19 MPH or more for approximately 1 minute CAUTION e When a wheel sensor short circuit is detected if the vehicle is not driven at 30 km h 19 MPH or more for at least 1 minute
104. same results appear replace ABS actuator and electric unit control unit Refer to BRC 44 Removal and Installation NG Repair the circuit ABS TCS Control Unit Power and Ground Systems Inspection EFS0035E INSPECTION PROCEDURE BRC 1 SELF DIAGNOSIS RESULT CHECK WFIA0108E Check self diagnosis results Self diagnosis results BATTERY VOLTAGE Is the above displayed in the self diagnosis display items Yes gt gt GO TO 2 No gt gt INSPECTION END 2 CONNECTOR INSPECTION 1 Disconnect the ABS actuator and electric unit control unit connector E125 2 Check the terminals for deformation disconnection looseness or damage OK or NG OK gt gt GO 3 gt gt Repair or replace as necessary 9 ABS TCS CONTROL UNIT POWER AND GROUND CIRCUIT INSPECTION Measure the voltage and continuity between the ABS actuator and electric unit control unit connector E125 and ground ABS actuator and electric unit Signal name control unit Ground Measured value connector E125 Power supply 29 GR Battery voltage Approx 12V 16 B Continuity should exist 30 B OK or NG OK Check the battery for loose terminals low voltage etc Repair as necessary NG Repair the circuit Revision January 2005 BRC 35 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS TCS ABS CAN Communication System Inspection EFS0035F
105. t motor and motor relay Ignition switch ON or engine ON Inspection running ABS activated Vehicle stopped Ignition Actuator tal ra Switch OFF BRC 84 Actuator Motor ACTUATOR RLY ee Motor Relay and Circuit tion status stopped Engine run Inspection ning When VDC OFF indicator ON eens m indi lamp is ON 88 ommu OFF LAMP VDC nication System Inspec lamp status Note3 When VDC OFF indicator tion lamp is OFF When SLIP indicator lamp is ON ON BRC 88 CAN Commu SLIP LAMP nication System Inspec status Note 4 When SLIP indicator lamp is oec tion OFF VR FR LH IN SOL Actuator solenoid is active FR LH OUT SOL ACTIVE TEST with CON ON FR RH IN SOL SULT II or actuator relay is FR RH OUT SOL Solenoid valve opera inactive in fail safe mode RR RH IN SOL tion RR RH OUT SOL When actuator solenoid is RR LH IN SOL not active and actuator relay is OFF active ignition switch ON di BRC 83 Solenoid and When actuator switch over VDC Change Over Valve valve is active System Inspection TEST with CONSULT II or ON cvi actuator relay is inactive when CV2 VDC switch over valve in fail safe mode SV1 status When actuator switch over valve is not active and actua OFF Revision January 2005 tor relay is active ignition switch ON BRC 67 2004 Quest TROUBLE DIAGNOSIS
106. te for approximately 1 second after turning the ignition switch ON OK or NG OK Carry out self diagnosis Refer to BRC 70 SELF DIAGNOSIS NG gt gt Go to BRC 92 ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned Pedal Vibration or ABS Operation Noise EFSQ036W NOTE During ABS activation pedal vibration may be felt and a noise may be heard This is normal and does not indi cate a malfunction 1 CHECK SYMPTOM 1 Apply brake 2 Start engine Does the symptom occur only when engine is started Yes Carry out self diagnosis Refer to BRC 70 SELF DIAGNOSIS No gt gt GO TO 2 2 RECHECK SYMPTOM Does the symptom occur only when electrical equipment switches such as headlamps are turned on Yes Check for radio antenna or related wiring that is routed too close to the ABS actuator and electric unit control unit and reroute as necessary No Go to BRC 89 ABS Works Frequently Revision January 2005 BRC 91 2004 Quest TROUBLE DIAGNOSES FOR SYMPTOMS VDC TCS ABS ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned gt 1 CHECK ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT FUSES Check 40 fusible link f and 40A fusible link for ABS actuator and electric unit control unit For fusible link layout refer to PG 4 POWER SUPPLY ROUTING CIRCUIT OK or NG OK gt gt GO TO 2 NG gt gt If fusible link is blown be sure to eliminat
107. tery positive cable negative cable and ground connection are not loose In addition make sure the battery is sufficiently charged ABS WARNING LAMP SLIP INDICATOR LAMP AND TCS OFF INDICATOR LAMP INSPECTION 1 Make sure ABS warning lamp SLIP indicator lamp and TCS OFF indicator lamp when TCS OFF switch is off turn on for approximately 2 seconds when the ignition switch is turned ON If they do not check the TCS OFF indicator lamp and the TCS OFF switch Refer to BRC 36 TCS OFF SWITCH Check CAN communications If there are no errors with the TCS OFF switch or the CAN communication system check combination meter Refer to DI 5 COMBINATION METERS Make sure the lamps turn off approximately 2 seconds after the ignition switch is turned ON If the lamp does not turn off conduct self diagnosis With the engine running make sure the TCS OFF indicator lamp turns on and off when the TCS OFF switch is turned on and off If the indicator lamp status does not correspond to switch operation check the TCS OFF switch Refer to BRC 36 TCS OFF SWITCH Make sure ABS warning lamp SLIP indicator lamp and TCS OFF indicator lamp turn off approximately 2 seconds after the engine is started If ABS warning lamp SLIP indicator lamp or TCS OFF indicator lamp have not turned off 10 seconds after the engine has been started conduct self diagnosis of the ABS actu ator and electric unit control unit After conducting the self diagnosis be sure to
108. the ABS warning lamp will not turn off even if the malfunction is repaired Turn ignition switch OFF to prepare for erasing the memory Start the engine and touch START NISSAN BASED VHCL ABS SELF DIAG RESULTS ERASE in order on the CONSULT II screen to erase the error memory If ABS is not indicated go to GI 37 CONSULT II Data Link Connector DLC Circuit CAUTION If the error memory is not erased re conduct the operation from step 4 For the final inspection drive at approximately 30 km h 19 MPH or more for approximately 1 minute and confirm that the ABS warning lamp SLIP indicator lamp and VDC OFF indicator lamp turn off Revision January 2005 BRC 70 2004 Quest Display Item List Self diagnostic item TROUBLE DIAGNOSIS Malfunction detecting condition VDC TCS ABS Check system FR LH SENSOR 1 C1104 Circuit of front LH wheel sensor is open RR RH SENSOR 1 C1101 Circuit of rear RH wheel sensor is open FR RH SENSOR 1 C1103 Circuit of front RH wheel sensor is open RR LH SENSOR 1 C1102 Circuit of rear LH wheel sensor is open FR LH SENSOR 2 C1108 Circuit of front LH wheel sensor is shorted or sensor power volt age is unusual ABS actuator and electric unit control unit can not identify sensor pulses because of large gap between wheel sensor and sensor rotor RR RH SENSOR 2 C1105 Circuit of rear RH wheel sensor is shorted or se
109. tion High speed cornering Vehicle speed Greater than 10 km h 6 MPH L Vehicle speed 10 km h 6 MPH or less Vehicle is stopped Applying brake conditions Suddenly Gradually Other conditions Operation of electrical equipment Shift change Other descriptions Revision January 2005 BRC 57 WFIA0097E 2004 Quest TROUBLE DIAGNOSIS VDC TCS ABS Component Parts and Harness Connector Location EFS00369 Rear wheel sensor RH IB ABS actuator and electric unit control unit Front wheel sensor RH 5 Rear wheel sensor LH a Yaw rate side decel G sensor Combination meter warning and indicator lamps Steering angle sensor integral to spiral cable Front wheel sensor LH Engine removed for clarity Rear wheel sensor RH Qu SO DA ABS actuator and electric Front wheel i sensor RH SLIP K Spiral cable includes steering Front wheel angle sensor sensor LH WFIA0150E Revision January 2005 BRC 58 2004 Quest TROUBLE DIAGNOSIS VDC TCS ABS EFS0036A Hu HI HOSN3S HOSN3S HOSN3S T33HM uvau
110. to improve vehicle stability by controlling the braking and engine torque application to the wheels e The SLIP indicator lamp flashes to inform the driver of VDC operation e During VDC operation the vehicle body and brake pedal may vibrate lightly and a mechanical noise may be heard This is normal e The ABS warning lamp VDC OFF indicator lamp and SLIP indicator lamp may turn on when the vehicle is subject to strong shaking or large vibration such as when the vehicle is on a turn table or a ship while the engine is running or on a steep slope In this case restart the engine on a normal road and if the ABS warning lamp VDC OFF indicator lamp and SLIP indicator lamp turn off there is no problem Revision January 2005 BRC 51 2004 Quest SYSTEM DESCRIPTION VDC TCS ABS Wheel Sensors EE Each wheel sensor unit consists of a wheel hub with a series of inter nal magnets and a sensor element The wheel sensors are installed on the inner side of the wheel knuckles As the wheel rotates the sensor generates a square wave signal The frequency increases as the wheel speed increases Control unit Magnetic flux WFIA0033E Fail Safe Function EFS00365 CAUTION If the Fail Safe function is activated perform the Self Diagnosis for ABS TCS VDC system ABS EBD SYSTEM In case of an electrical malfunction with the ABS the ABS warning lamp VDC OFF indicator lamp and SLIP indicator lamp wi
111. uator and electric unit control unit connector E125 2 Check the terminals for deformation disconnection looseness or damage OK or NG OK gt gt GO 3 gt gt Repair or replace as necessary Revision January 2005 BRC 84 2004 Quest TROUBLE DIAGNOSIS FOR SELF DIAGNOSTIC ITEMS VDC TCS ABS 3 CHECKING ABS MOTOR AND MOTOR RELAY POWER SYSTEM 1 Check voltage between ABS actuator and electric unit control unit connector E125 and ground A ABS actuator and electric Bod Measured ABS actuator and electric unit control unit value unit control unit connector connector E125 9 Approx 1 12V WFIA0106E 2 Check resistance between ABS actuator and electric unit con trol unit connector E125 and ground A unit control unit value unit control unit connector Ped connector E125 9 46 GA 46 B 00 ABS actuator and electric Measured ABS actuator and electric OK or NG OK gt gt Perform self diagnosis again If the same results appear replace ABS actuator and electric unit control unit Refer to BRC 97 Removal and Installation NG Repair the circuit Stop Lamp Switch System Inspection EFS00s6N INSPECTION PROCEDURE 1 SELF DIAGNOSIS RESULT CHECK WFIA0113E Check self diagnosis results Self diagnosis results STOP LAMP SW 1 Is the above displayed in
112. uit of front LH IN ABS solenoid is open or shorted or control line is open or shorted to power supply or ground FR LH OUT ABS SOL C1121 Circuit of front LH OUT ABS solenoid is open or shorted or con trol line is open or shorted to power supply or ground RR RH IN ABS SOL C1126 Circuit of rear RH IN ABS solenoid is open or shorted or control line is open or shorted to power supply or ground RR RH OUT ABS SOL C1127 Circuit of rear RH OUT ABS solenoid is open or shorted or con trol line is open or shorted to power supply or ground FR RH IN ABS SOL C1122 Circuit of front RH IN ABS solenoid is open or shorted or control line is open or shorted to power supply or ground FR RH OUT ABS SOL C1123 Circuit of front RH OUT ABS solenoid is open or shorted or con trol line is open or shorted to power supply or ground RR LH IN ABS SOL C1124 Circuit of rear LH IN ABS solenoid is open or shorted or control line is open or shorted to power supply or ground RR LH OUT ABS SOL C1125 Circuit of rear LH OUT ABS solenoid is open or shorted or con trol line is open or shorted to power supply or ground Front side VDC switch over solenoid valve cut valve is open or shorted or control line is open or shorted to power supply ground Rear side VDC switch over solenoid valve cut valve is open or C1165 shorted or control line is open or shorted to p
113. vision January 2005 BRC 44 2004 Quest ACTUATOR AND ELECTRIC UNIT ASSEMBLY TCS ABS INSTALLATION Installation is in the reverse order of removal e Refer to BR 12 BRAKE PIPING AND HOSE when connecting the brake tubes CAUTION To install use a flare nut wrench commercial service tool e Always tighten the brake tubes to the specified torque when installing e Never reuse drained brake fluid e After installation of the ABS actuator and electric unit control unit refill the brake system with new brake fluid Then bleed the air from the system Refer to BR 11 Bleeding Brake System Revision January 2005 BRC 45 2004 Quest PRECAUTIONS VDC TCS ABS PRECAUTIONS PFP 00001 Precautions for Supplemental Restraint System SRS AIR BAG and SEAT BELT PRE TENSIONER EFS0057Z The Supplemental Restraint System such as AIR BAG and SEAT BELT PRE TENSIONER used along with a front seat belt helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision This system includes seat belt switch inputs and dual stage front air bag modules The SRS system uses the seat belt switches to determine the front air bag deployment and may only deploy one front air bag depending on the severity of a collision and whether the front occupants are belted or unbelted Information necessary to service the system safely is included in the SRS and SB section of this Service Man ual W

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