Home

BENDIX BW2726 User's Manual

1. Semi Trailer Tandem Axle Trailer SE i Left Road Side ear oT Bendix WS 24 Wheel Speed Sensors FIGURE 28 4S 2M SIDE CONTROL 0 DEGREE WITH FRONT LIFT AXLE ABS ELECTRICAL amp AIR SYSTEM 4S 2M SIDE CONTROL Rear Lift Axle 0 Degree Mounting Orientation Bendix WS 24 Wheel Speed Sensors Right Curb Side S D S F Dashed Ground m l line box A Brake Lamp Power Air Bellow C Shows iion Ignition over A Loa sensor Me Uti Power C NC S where used TS rS D Indicator Lamp E Ground s Brake Lamp Power 5 Pin ABS I Pi D kr Trailer Chassis Harness Trailer ABS Pigtail Harness Control Line Bendix pam TABS 6 Supply Line mm Advanced Bendix Multi SR 5 Trailer Channel Spring Brake Valve ABS Indicator Lamp Semi Trailer Tandem Axle Trailer 5 M emm SE Lift Axle LL Left Road Side Bendix WS 24 Wheel Speed Sensors FIGURE 29 4S 2M SIDE CONTROL 0 DEGREE WITH REAR LIFT AXLE ABS ELECTRICAL amp AIR SYSTEM 30 Troubleshooting System Schematics Power 4S 2M SIDE CONTROL Front Lift Axle Right Curb Side 180 Degree Mounting Orientation Dashed line box Shows Lift Axle Bendix WS 24 Wheel Speed Sensors Ground EL E A Brake Lamp Power B Ignition Power 4 A Ignition C NC odande
2. la SENSOR S D J SENSOR S D gt E 5 PIN PACKARD O CONNECTOR s 5 NOT USED lt norus lt D O E E IGNITION VOLTAGE p D BRAKE LAMP VOLTAGE _ NOT USED A C USED nc ABS INDICATOR LAMP AUX I O 7 D 3 lt TRAILER MOUNTED Rear Dump Control 1 d 2 ABS INDICATOR Relay and ATC Valve 1 2 a Q LAMP HH Optional 2 NoTUED x Lift Bag i LY Nor usen ylNoTUSED NOTUSED gt T NOT USED NOT USED I Optional je Te AUX IO 1 _ 5 5 1 AUX I O 2 am s AUXILIARY 1032 Q A SENSOR SUPPLY LLI be E SENSOR INPUT E O Sep m SENSOR GROUND 2 2 gt 2 6 lt 3 lt Optional 2 4 NOT USED 72 amp gt 4 PIN CONNECTORS NOTUSED 9 Q Bendix Trailer 1939 lt Information Module 4 4 SAE J1939 D G2 OPTIONAL T 6 2 gt P e AUX TO RETURN 1 amp 2 lt i 5 5 2 gt gt 2 1 lt NOT USED 4 NOT USED NC E BUXUORETURNS a z t NOT USED 3 3 NOT USED lt 2 2 1 lu 1 lt lt 1 USED NOTUSED 1 7 PIN SENSOR S C CONNECTOR 5 C SENSOR S C O SENSOR S C I 4 FIGURE 20 BENDIX TABS 6 ADV MC MODULE ELECTRICAL SCHEMATIC 2S 2M SENSOR S D 7 WAY SAE 4 1 la SENSOR S D z SENSOR S D 1 210 5 PIN PACKARD gt scr E SENSOR S F
3. Bendix TABS 6 Advanced Multi Channel Trailer ABS Module Sealed 12 Pin Connector Mounting Studs Part Number ECU Cover ECU Connector Covers on Both Sides Removable T Pin Connector Mounting Studs Cover Lock ne Speed Etched Here with Slide Lock Mes Speed ensor For Port Tab ensor Descriptions For Part Label Information Connectors See Page 3 See Page 40 FIGURE 1 BENDIX TABS 6 ADVANCED MULTI CHANNEL MODULE BENDIX TABS 6 ADV MC 1 INTRODUCTION The Bendix TABS 6 Adv MC module is an integrated multi Section TABLE OF CONTENTS REN EUER PAGE channel 4S 2M trailer service brake module controller for air braked heavy duty semi trailers that features Bendix EE Poen 12 Antilock Brake System ABS Bendix Trailer Roll Stability Sale Maintenance Practices cs ces eae Program TRSP 3 Antilock Brake System ABS Operation 3 g 4 Trailer Roll Stability Program TRSP Operation 4 Installed on semi trailers the module acts as a relay valve 5 Components 5 6 during normal braking but during ABS events it will intervene 6 7 to help maintain vehicle stability and minimize stopping 7 Pigtail Wiring Harnesses 7 distance by preventing wheel lock up The Bendix TRSP 8 ABS 8 monitors the trailer s motion and reduces the
4. the Does If the dash mounted trailer ABS NO trailer the trailer indicator lamp remains ON with le mounted ABS mounted ABS no trailer connected troubleshoot indicator lamp stay indicator lamp stay ON the dash mounted trailer lamp ON for 6 5 for 2 5 seconds circuit on the tractor seconds and and then turn then turn OFF If the trailer ABS lamp remains OFF ON with a trailer connected rerun the power up sequence for the trailer mounted ABS indicator lamp Go to Section A Me End of Line test The module is functioning normally No service to the ABS unit is needed 35 36 SECTION C TROUBLESHOOTING THE TRAILER MOUNTED ABS INDICATOR LAMP CIRCUITRY Thetrailer mounted ABS indicator lamp did not illuminate during the power up sequence Troubleshoot the power supply to the ABS module Go to Section D Continue if the power and ground wiring are OK dum off the power to the module UN Inspect the condition of the ABS indicatorlamp connector and ground Using a volt ohm meter verify continuity from the trailer chassis ground pin 4 to the ground pin of the indicator lamp If repairs are made rerun the power up sequence Go to Section A Continue if the indicator lamp and wire check out OK J with power off to the ABS N module disconnect the 7 pin ECU connector Verify con
5. 11 Auxiliary Error AUX I O 2 Auxiliary I O Error AUX I O 3 Check for corroded damaged wiring or connectors between the ECU and the auxiliary device Check Pins X2 2 amp X2 11 of the ECU In Out connector for the following Pins not pushed back Correctly wired to the auxiliary device Pin X2 2 supply Pin X2 11 ground Shorted to ground Vpat or other ECU pins Verify the auxiliary device is properly functioning and rated for maximum load of lt 2 amps After repairs or if no issues are found clear the diagnostic code If the diagnostic code persists contact your local Bendix representative before replacing the TABS 6 Adv MC module Check for corroded damaged wiring or connectors between the ECU and the auxiliary device Check Pins X2 3 amp X2 12 of the ECU In Out connector for the following Pins not pushed back Correctly wired to the auxiliary device Pin X2 3 supply pin X2 12 ground Shorted to ground Vpat or other ECU pins Verify the auxiliary device is properly functioning and rated for maximum load of x 1 5 amps After repairs or if no issues are found clear the diagnostic code If the diagnostic code persists contact your local Bendix representative before replacing the TABS 6 Adv MC module 152 12 152 12 612 12 612 12 18 Diagnostic Trouble Codes DTCs conti
6. and between the Brake Lamp Power pin and the Ground pin of the ECU connector The operating range of the module is 8 0 32 0 VDC Can you verify that measurements found are equal to the vehicle voltage within 1 VDC at both the ignition and brake power inputs With a volt ohm meter check the power and ground wiring Look for corroded or damaged wire or connectors If repairs are made rerun the power up sequence Go to Section A Measure the loaded voltage across a type 1157 brake light bulb Looking into TABS 6 Advanced MC Module 7 pin Connector Pigtail Harness Measure Ignition Power pin 1 to Ground pin 4 and Brake Lamp Power pin 2 to Ground pin 4 37 SECTION E TROUBLESHOOTING THE BENDIX WS 24 WHEEL SPEED SENSORS WSS Turn off the power to the module disconnect the wheel speed sensor connector Dynamic WSS DTCs are present UN Rotate the affected wheel and verify a minimum of 0 25 sensor output 0 5 RPS across the wheel speed sensor pins A properly positioned sensor can output more than 2 0 VAC 1 RPS Verify inspect the following Speed sensors properly contact the tone ring condition and retention force of the sensor sleeve Proper sensor lead condition routing and clamping sleeve Condition of tone ring mounting and teeth Proper number of tone ring teeth per sensed wheel e Proper adjustment of wheel bearings e Co
7. r gt gt S F 2 2 0 e E gt gt E IGNITION VOLTAGE gt gt D BRAKE LAMP VOLTAGE _ e gt C NOTUSED NOT USED c Lu ABS INDICATOR LAMP AUX I O 7 13 lt E l TRAILER Rear Dump Control GROUND 77S D ABS INDICATOR Relay and ATC Valve s xl LAMP Optional Fy 2 2 6 4 norus SINOTUSED NOTUSED gt Switch T O NOT USED NOT USED O Optional e se AUX IIO 1 i AUX 1 0 2 eng gt AUXILIARY 3 z Q e E E SENSOR SUPPLY a EE SENSOR Ea SENSORGROUND 3 Z Optional NOT USED z lt 4 E 4 7 iz gt 4 PIN CONNECTORS NOTUSED 2180 Q Bendix Trailer SAE J1939 H lt Information Module 4 lt 1 gt SAE J1939 L lt G2 OPTIONAL E AUX VO RETURN 1 amp 22 d NOT USED 42 s NOT USED m c AUX RETURN t lt lt 2 NOTUSED lt 2 lt 2 SENSOR S E SENSOR S E SENSOR S E NOT USED 1 4 1 USED 2 lo 7 PIN SENSOR S C z SENSOR 5 C SENSOR 5 lo FIGURE 21 BENDIX TABS 6 ADV MC MODULE ELECTRICAL SCHEMATIC 4S 2M 26 Troubleshooting System Schematics 2S 2M SIDE CONTROL Fixed Axles i 0 Degree Mounting Orientation Rights cubsie ee Ground Air Bellow Brake Lamp Power wh
8. High Side Driver Output AuxlO1 Digital Input Input Aux I O 2 High Side Driver Output AuxlO2 Digital Input Input Aux High Side Driver Output AuxlO3 Digital Input Input AuxRet 12 11 Low Side Driver Output AuxRet 3 12 Low Side Driver Output Sens_Sup 4 5V Sensor Supply Output Sens_In 5 Analog Input Input Sens_Gnd 6 Low Side Driver Input CHART 3 AUXILIARY 1 05 Bendix ACom diagnostic software version 6 1 and higher supports the configuration of the TABS 6 Adv MC module auxiliary I Os 13 BENDIX ABS FLEX PROGRAM The Bendix ABS Flex program uses Auxiliary Design Language ADL to allow customized auxiliary functions to be carried out by the Bendix TABS 6 Adv MC module Programs developed in the ABS Flex program may be downloaded at the production line or in the field to control non braking functions of the trailer For example the ABS Flex program can potentially com municate the status of tire inflation and or temperature reefer temperature load presence slider pin position lift axle position proximity reverse alarm and vehicle weight ABS Flex programs monitor the auxiliary I Os and or the SAE J1939 CAN and SAE J2497 PLC data links Contact your Bendix Account Manager to discuss an ABS Flex program for your vehicle s 14 CUSTOMER SCRATCH PAD The TABS 6 Adv MC module has a Customer Scratch Pad feature which allows the customer or end user to store up to 1 008 bytes
9. Speed Sensor Left Road Side FIGURE 23 BENDIX TABS 6 ADV MC MODULE 2S 2M SIDE CONTROL 180 DEGREE ABS ELECTRICAL amp AIR SYSTEM 27 Troubleshooting System Schematics 45 2 SIDE CONTROL Fixed Axles Bendix WS 24 Wheel Speed Sensors 0 Degree Mounting Orientation amp 9 Right Curb Side S F S D roun Air Bellow A Brake Lamp Powe B Ignition Power Ed ree Gum ar C NC gt Load Sensor C Qa D Indicator Lamp where used E Ground Brake Lamp Power 5 Pin ABS alo Connector i 7 Pin SAE J560 Trailer Chassis Harness Trailer ABS Pigtail Harness Connector Bi ControlLine Co l pendi P i Advanced Supply Line SR 5 Trailer en Spring Brake Valve P22 ABS Indicator Lamp Semi Trailer Tandem Axle Trailer 1 O ee C d S E S C Left Road Side Bendix WS 24 Wheel Speed Sensors FIGURE 24 BENDIX TABS 6 ADV MC MODULE 4S 2M SIDE CONTROL 0 DEGREE ABS ELECTRICAL amp AIR SYSTEM 4S 2M SIDE CONTROL Fixed Axles 180 Degree Mounting Orientation Ground Right Curb Side Bendix WS 24 Wheel Speed Sensors A Brake Lamp Power an m B Ignition Power 4 a Ignition C NC Air Bellow D Indicator Lamp where used E Ground TR 7 Ruin Brake Lam
10. amm C Power D Indicator Lamp am eee pU 5 E Ground Brake Lamp 5 Pin ABS Connector T Pin SAE J560 Trailer Chassis Harness Trailer ABS Pigtail Harness Connector Control WE l 7 Bendix Suppl TABS 6 d Advanced Multi SR 5 Trailer Spring Brake Channel Valve ABS Indicator Lamp J Semi Trailer Tandem Axle Trailer 4 7 El ol I eL Lift Axle Left Road Side Bendix WS 24 Wheel Speed Sensors FIGURE 30 4S 2M SIDE CONTROL 180 DEGREE WITH FRONT LIFT AXLE ABS ELECTRICAL amp AIR SYSTEM 4S 2M SIDE CONTROL Rear Lift Axle Right Curb Side 180 Degree Mounting Orientation Ground Bendix WS 24 Wheel Speed Sensors an A Brake Lamp Power Dashed Ignition Power 2 r a line box C NC Air Bellow Shows Ignition D Indicator Lamp where used JIC Lift Axle Power E Ground lt pu sg Brake Lam SE Bouer T 5 Pin ABS D Connector 7 Pin SAE J560 Trailer Chassis Harness Trailer ABS Pigtail Harness Connector Control Bendix Suppl TABS 6 P d Advanced mI E Multi SR 5 Trailer Spring Brake Channel Valve ABS Indicator Lamp Aj SE Semi Trailer Tandem Axle Trailer laa 5 S F Lift Axle C L ad Left Road Side Bendix WS 24 Wheel Speed
11. of information This information can then be read using the Bendix ACom diagnostic software version 6 1 and higher 15 POWER UP SEQUENCE At power up the TABS 6 Adv MC module performs a series of self checks that can assist a technician to determine the ABS system status and configuration Trailer ABS Indicator Lamp At power up with no detected Diagnostic Trouble Codes DTCs the trailer ABS indicator lamp will illuminate for approximately two 2 to six 6 seconds as a bulb check and then turn off See Figure 9 If any active ABS or TRSP related diagnostic codes are present the trailer ABS indicator lamp will remain illuminated For non ABS or TRSP related DTCs such as auxiliary functions at power up the trailer ABS indicator lamp will turn on for approximately six and a half 6 5 seconds as an extended bulb check and then turn off Ifa PLC ready towing vehicle and trailer are powered at the same time the TABS 6 Adv MC module will also trigger a bulb check on the dash mounted trailer ABS indicator lamp Modulator Chuff Test at Power Up At power up the TABS 6 Adv MC module activates a modulator chuff test This electrical and pneumatic ABS modulator test can help the technician identify problems with modulator installations and or wiring With brake pressure applied a properly installed modulator will cause two rapid audible chuffs of air pressure The TABS 6 Adv MC module will not perform a modulator chuff t
12. part of the wheel assembly The default setting expects a 100 tooth tone ring to be used See Section 17 for more information As the wheel turns the teeth of the exciter ring pass the wheel speed sensor generating an AC signal which is delivered to the TABS 6 Adv MC module ECU The signal varies in voltage and frequency as the wheel speed changes Vehicle axle and ABS control configurations determine if two or four wheel speed sensors are required See Figures 20 and 21 for an electrical system schematic showing wheel speed sensor connector pin locations CAUTION Correct wheel speed sensor installation is necessary for optimal ABS operation NOTE If the trailer is equipped with a lift axle that will use wheel speed sensors it is important that secondary sensors SE and SF be used forthis axle See the system diagrams included in this document In all cases the primary wheel speed sensors must be located on the fixed axle For 2S 2M systems the fixed axle sensors are SC SD 1 Forincreased corrosion protection Bendix recommends that a high temperature rated silicon or lithium based grease be applied to the interior of the mounting block the sensor and to a new clamping sleeve 2 Install the new clamping sleeve fully into the block with the retaining tabs toward the inside of the vehicle Please note that Bendix WS 24 wheel speed sensors must use the correct clamping sleeve to avoid problems associated with reduced r
13. system is completely disabled the standard pneumatic brake function of the vehicle will still be available but without the benefits of ABS The TRSP feature is also disabled with an active ABS system diagnostic code If the indicator lamp is illuminated always have the ABS system serviced at the earliest opportunity 4 BENDIX TRAILER ROLL STABILITY PROGRAM TRSP OPERATION A WARNING During a Bendix TRSP system intervention the vehicle automatically decelerates The TABS 6 Adv MC module can slow the vehicle with or without the driver applying the brake pedal and even when the driver applies the throttle A WARNING Even with TRSP system equipped vehicles the driver remains responsible for ensuring vehicle stability during operation The TRSP system only functions within the limits of physics The system can help mitigate potential vehicle stability incidents but cannot prevent them in all cases Other factors such as driving too fast for the road traffic or weather conditions over steering an excessively high vehicle Center of Gravity CG poor road conditions or insufficient vehicle maintenance can cause vehicle instability that is beyond the capability of any stability system to mitigate A WARNING The TRSP system should only be used on specific vehicle platforms that have been validated and approved by BCVS engineering A WARNING The TRSP system is not approved for use on combination vehicles commonly
14. the valve All air hoses and fittings should be checked for leaks prior to returning the vehicle to service 3 Reconnect the ECU power auxiliary if present and wheel speed sensor electrical connectors to the ECU Apply a moderate amount of non conductive electrical grease to each connector pin before reconnecting Note The wheel speed sensors mustfollow the orienta tion of the module as shown in Figure 19 for fixed axle trailers Where a lift axle is present and sensors are to be installed on that axle secondary sensors SE and SF must be used for the lift axle e It is necessary to fix the wheel speed sensors to the orientation of the lateral acceleration sensor for plausibility checks between the sensors f the wheel sensor location does not match the orientation of the Bendix TABS 6 Adv MC module shown in Figure 19 a Diagnostic Trouble Code DTC will be generated and the ABS indicator lamp will be illuminated Refer to the raised lettering on the top cover for wheel speed designation 5 S D S E and S P 4 Leakage and Operational Tests must be performed before returning the vehicle to service LEAKAGE AND OPERATIONAL TESTS 1 Before performing the leakage tests block the wheels 2 Fully charge the air brake system and verify proper brake adjustment 3 Make several trailer brake applications and check for prompt application and release at each wheel 23 0 Mounti
15. to a trailer cross member The TABS 6 Adv MC module uses three Class 8 steel M10x1 5 nuts with lock washers torqued to 354 44 4 in Ibs 40 5 Nm A bracket may be used if direct mounting to a cross member is not possible 7 PIGTAIL WIRING HARNESSES Several pigtail wire harnesses are available to connect the TABS 6 Adv MC module with other trailer system components See Figure 6 Pigtail harnesses are weather sealed at the connector interface and are clearly labeled for proper installation Because of the over molded design of the wiring harnesses Bendix recommends that if damage or corrosion occurs the complete harness be replaced Wheel Speed Connectors The TABS 6 Adv MC module includes two primary and two secondary wheel speed sensor connections separate from the main vehicle pigtail harnesses and each requires a separate harness ECU Connectors The TABS 6 Adv MC module ECU has two connectors in addition to the wheel speed sensor connectors mentioned above The primary connector is a 7 pin custom series screw on type connector used to connect to the vehicle s power pigtail harness The other connector is a 12 pin Deutsch DT series style connector used for auxiliary inputs and outputs I Os POWER AND GROUND Trailer electrical power is supplied to the TABS 6 Adv MC module from the ignition and brake light circuits See Charts 1 and 2 for output values and pin locations Value 8 0 to 32 0 VDC Function Mode O
16. trailer service brake pressure that is being delivered to the wheel ends through or by the TABS 6 Adv MC module system and sends electrical signals directly proportional to the delivered trailer service brake pressure to the ECU Modulator Relay Valve MRV MRVs are integrated into the module and are controlled electrically by the ECU to decrease hold or allow the full applied brake pressure into the brake chamber to control the braking torque at the wheels External Wheel Speed Sensors WSS Located at selected hubs wheel speed sensors detect the rotation of indi vidual wheels and send an electrical signal to the ECU proportional to the rotational velocity See Figure 3 External Load Sensor For spring suspension systems an external electrical spring deflection sensor is installed typically as close to the center 5 inches as possible of an axle with linkage attached to the center of the axle but MUST NOT be installed on a lift axle See Figure 4 Vehicles with a mechanical load sensor have the port P42 used for sensing the air suspension system plugged Sensor Clamping Sleeve Acceptable Logo Stamped Sleeves 90 Speed Sensors Note Do Not Use Previous WSS Clamping Sleeves That Have BW in a Diamond Straight Speed Sensors FIGURE 3 BENDIX WS 24 WHEEL SPEED SENSORS i Rubber FIGURE 4 D Link and TYPICAL Rod EXTERNAL LOAD SENSOR INSTALLATION Load S
17. values 39 ECU Part Number Label The external part number label is located above the control port of the module If this label is not readable for any reason the Bendix part number is etched into the module casting above the control port See Figure 1 A Bendix manufacturing date code is to the right of the part number inscription There is an additional label under one of the covers that shows a pin out diagram for the 12 pin auxiliary connector Bendix Part Number Bendix 123456 Data inf K987654Vxx YYWWDAAAAYYWNWI XXX DLL X Knorr Bremse 03 M Component ID mc Final 8 Digits Show Initial Software Loaded FIGURE 36 LABEL INFORMATION Software Revision Level The number of the initial software loaded on the ECU is also indicated The current software revision number can be read using a diagnostic tool Document Revision Level Please visit Bendix com to ensure you have the latest version of this document Log on and Learn from the Best On line training that s available when you are 24 7 365 Visit www brake school com BW2726 2013 Bendix Commercial Vehicle Systems LLC a member of the Knorr Bremse Group All Rights Reserved 6 13 40
18. 2497 PLC SAE J1939 CAN Diagnostics the Bendix Trailer Remote Diagnostic Unit TRDU and the Bendix Trailer Information Module Support for SAE J2497 Power Line Carrier PLC communication to the towing vehicle amp diagnostics Support for SAE J1939 CAN communication for diagnostics and external devices A pressure equalizing valve in the sealed ECU housing to give improved protection from water etc Aserviceable nylon filter to help prevent foreign material from entering the control port Locking dust covers to provide electrical connector and cable protection 3 8 Load Port 42 For Air Suspension Plugged for Non Air Suspension or Spring Suspension Sensor Vehicles if 7 Two 3 8 NPT Delivery Ports 21 To Brake Chambers 3 8 NPT Delivery Port 21 to Brake Chambers 1 2 NPT Supply Port 1 3 8 NPT Control Port with Integral Filter
19. 8 791 08 i Go to Section E on Page 38 AE eee i 003 01 791 01 7 003 02 791 02 1 004 08 792 08 5 3 004 01 792 01 004 02 792 02 Tire Diameter Out of 2 4 Range 001 13 789 13 Sensor 5 Tire Diameter Out of Verify the correct tire size as desired 3 4 Verify the proper tire inflation rd i Sensor S D y Tire Diameter Verify the correct number of exciter tone ring teeth 4 4 Range Verify that the TABS 6 Adv MC module ECU has been programmed 003 13 791 13 Sensor S E with the correct tire size and tone ring settings Tire Diameter Out of 5 4 Range 004 13 792 13 Sensor S F 13 Diagnostic Trouble Codes DTCs continued J1587 1939 ae Eh ibi Perle Possible Causes Repair Information SID SPN igi igi escription FMI FMI Trailer Power 1 Power Supply DTC trailer power above 32 volts 6 1 Over voltage Go to Section D on Page 37 251 03 3597 03 Power Supply DTC trailer power below 8 volts 6 2 Low voltage Go to Section D on Page 37 251 04 3597 04 6 3 Excessive power Power Supply DTC possible corroded or shorted trailer power circuit 251 13 3597 13 line resistance Go to Section D on Page 37 Pressure Sensors Internal P4 P42 amp P21 P22 amp P1 Verify the trailer s control service pressure is 130 psi In
20. Active DTCs 5 Odometer Mileage Display 7 CHART 5 BLINK CODE INFORMATION Depending on the blink code mode activated the TABS 6 Adv MC module will blink the trailer mounted ABS indicator lamp to display active DTC codes inactive DTCs and odometer mileage Blink code diagnostics can also be used to clear active DTCs 11 Wait until after the modulator chuff test before activating the brake light power Alternatively wait five 5 seconds Note If certain Diagnostic Trouble Codes DTCs are set typically where modulator DTCs have occurred the chuff test may not run Following a single display of all available messages the ABS indicator lamp will remain on for five seconds and then return to normal operating mode Blink code diagnostics can only be activated following a power up where wheel speeds have not been detected If the vehicle moves during the blink code diagnostics mode the Bendix TABS 6 Adv MC module will cancel the blink code diagnostics and return to normal operating mode Blink code diagnostics must be activated within the first 15 seconds of ignition power being applied If brake light power is continuously applied for greater than five seconds blink code diagnostics will be disabled until the next time the ignition power is cycled Display Active Diagnostic Trouble Codes DTCs To display active codes apply ignition power and depress and release the brake pedal three 3 times within 15 seco
21. FF YES Perform End of Line test Themoduleisfunctioning normally 34 No service to the ABS unitis needed SECTION B POWER UP SEQUENCE DASH MOUNTED ABS INDICATOR LAMP Verify thata PLC traileris connected to the tractor via the 7 pin connector Turn the ignition ON and observe the dash mounted trailer ABS indicator lamp Observe the dash mounted Trailer ABS Indicator Lamp at Power Up Trailer ABS indicator lamp does E not illuminate Note Only towing vehicles built after March 1 2001 are required to have a trailer ABS indicator lamp The trailer ABS indicator lamp located on the vehicle dash is only activated by a PLC signal from a trailer or diagnostic tool The towing trailer must be equipped with an ABS unit with PLC Verify that a PLC signal is present on the trailer ignition power lines Refer to the PLC Communications section of this document Does the dash mounted ABS indicator lamp illuminate within 2 seconds of ignition power being applied to the vehicle If a PLC signal is present and the trailer ABS lamp does not illuminate at ignition troubleshoot the dash mounted trailer lamp circuit on the tractor Ne E dash mounted trailer ABS 2 indicator lamp stays ON This is an indication that the trailer ABS unit has a Diagnostic Trouble Does Code DTC
22. LLOW THESE INSTRUCTIONS TO AVOID PERSONAL INJURY OR DEATH When working on or around a vehicle the following general precautions should be observed at all times 1 Park the vehicle on a level surface apply the parking brakes and always block the wheels Always wear safety glasses 2 Stop the engine and remove ignition key when working under or around the vehicle When working in the engine compartment the engine should be shut off and the ignition key should be removed Where circumstances require that the engine be in operation EXTREME CAUTION should be used to prevent personal injury resulting from contact with moving rotating leaking heated or electrically charged components 3 Do not attempt to install remove disassemble or assemble a component until you have read and thoroughly understand the recommended procedures Use only the proper tools and observe all precautions pertaining to use of those tools 4 If the work is being performed on the vehicle s air brake system or any auxiliary pressurized air systems make certain to drain the air pressure from all reservoirs before beginning ANY work on the vehicle If the vehicle is equipped with a Bendix AD IS air dryer system or a dryer reservoir module be sure to drain the purge reservoir 5 Following the vehicle manufacturer s recommend ed procedures deactivate the electrical system in a manner that safely removes all electrical power from the vehicle 6
23. Lap Top Computer J2497 PLC or J1939 Noregon Adapter FIGURE 10 LAP TOP COMPUTER WITH BENDIX ACOM DIAGNOSTIC SOFTWARE For more information on the ACom diagnostic software or RP 1210 compliant tools contact Bendix or refer to your local authorized Bendix parts outlet 20 Bendix Trailer Remote Diagnostic Unit TRDU Tool 802162 LED lights illuminate Diagnostic Trouble Codes 10 LEDs FIGURE 11 THE BENDIX TRDU The Bendix TRDU tool provides the technician with a visual indication of Antilock Braking System ABS component DTC information The TRDU tool is specifically designed for use with Bendix Trailer ABS systems and Bendix makes no claims for its operation and or usability with other brands of trailer ABS Features of the Bendix TRDU Tool The TRDU tool attaches to a 7 pin to 7 pin adapter See Figure 12 and then into the J560 connector of the towing vehicle To Towing Vehicle J560 Connector To Trailer Connector SS Adapter 802165 FIGURE 12 TRDU TOOL AND ADAPTER The TRDU tool communicates across PLC The TRDU tool allows the technician to Troubleshoot ABS system component problems using DTC reporting via LEDs e Reset DTCs on Bendix ABS ECUs by holding a magnet over the reset of the TRDU tool for less than 6 seconds How the Bendix TRDU Tool Operates When the TRDU tool is plugged into the adapter and the adapter TRDU tool is installed between the
24. Never exceed manufacturer s recommended pressures 7 Never connect or disconnect a hose or line containing pressure it may whip Never remove a component or plug unless you are certain all system pressure has been depleted 8 Useonly genuine Bendix brand replacement parts components and kits Replacement hardware tubing hose fittings etc must be of equivalent size type and strength as original equipment and be designed specifically for such applications and systems 9 Components with stripped threads or damaged parts should be replaced rather than repaired Do not attempt repairs requiring machining or welding unless specifically stated and approved by the vehicle and component manufacturer 10 Prior to returning the vehicle to service make certain all components and systems are restored to their proper operating condition 11 For vehicles with Automatic Traction Control ATC the ATC function must be disabled ATC indicator lamp should be ON prior to performing any vehicle maintenance where one or more wheels on a drive axle are lifted off the ground and moving A wide variety of electrical inputs outputs I Os allow the customer to program auxiliary functions such as automatic Lift Axle Control LAC Integrated Speed Switch ISS external load sensors and Auxiliary Design Language ADL for customized auxiliary functions A wide range of diagnostic tools for flexible troubleshooting Blink Codes SAE J
25. PLC DIAGNOSTIC LINK All newer towed vehicles transmit a signal over the power line to the towing vehicle ABS ECU The signal using a heavy vehicle industry standard known as Power Line Carrier PLC J2497 is broadcast by the trailer ABS ECU over the blue wire ignition power line of the SAE J560 connector and controls an in cab trailer ABS indicator lamp See Figures 7 and 8 12 VDC 10 VDC duree 8VDC lt 6 VDC 4VDC 2VDC lt FIGURE 7 POWER LINE WITHOUT PLC SIGNAL 3 10 VDC 8VDC lt 6 VDC lt 4VDC 2VDC lt 0VDC FIGURE 8 POWER LINE WITH PLC SIGNAL The Bendix TABS 6 Adv MC module provides a data link for PLC communication following the SAE J2497 standard Bendix ACom diagnostics software version 6 1 and higher and the Bendix Trailer Remote Diagnostic Unit TRDU both support PLC communication with the TABS 6 Adv MC module PLC communication is applicable for 12 volt vehicle applications only The PLC communication is disabled for voltages greater than 18 volts Identifying and Measuring the PLC Signal A TABS 6 Adv MC module will continuously broadcast PLC messages that indicate trailer ABS status At power up or during a trailer ABS diagnostic Trouble Code DTC condition the TABS 6 Adv MC module will signal the
26. Sensors FIGURE 31 4S 2M SIDE CONTROL 180 DEGREE WITH REAR LIFT AXLE ABS ELECTRICAL amp AIR SYSTEM 31 Troubleshooting System Schematics 4S 2M AXLE CONTROL Front Lift Axle Right Curb Side i Dashed line b 180 Degree Mounting Orientation amm UU Air Below CD 2 CD A Brake Lamp P Wheel Speed B Ignition Power A S whorcused CE Ignition C NC Po S E TT S C Power D Indicator Lamp E Ground d Brake Lamp Power 5 Pin ABS Connector T Pin SAE J560 D Connector Trailer Chassis Harness Trailer ABS Pigtail Harness Control Line Bendix i TABS 6 Supply Line TE Advanced SR 5 Trailer Multi Spring Brake Channel Valve ABS Indicator Lamp f Semi Trailer Spread Axle Trailer Load Sensor 5 where used Bendix WS 24 CD 17 Speed e Left Road Side FIGURE 32 4S 2M AXLE CONTROL 180 DEGREE WITH FRONT LIFT AXLE ABS ELECTRICAL amp AIR SYSTEM H 11 H 5 4SI2M AXLE CONTROL Rear Lift Axle CR 180 Degree Mounting Orientation Shows Lift Axle m d Ground Air Bellow Bendix Co A Brake L WS 24 B ignition Power f where used wheel Speed Ignition C NC S 2 EE Sensors 13225 s E Power D Indicator Lamp E Ground M Brake Lamp Power 5 Pin ABS Connector T Pin SAE J560 Connector Trailer Chassis Harness Contro
27. Two 3 8 NPT Delivery Ports 22 To Brake Chambers 3 8 NPT Delivery Port 22 to Brake Chambers FIGURE 2 PORTS USED 3 ANTILOCK BRAKE SYSTEM ABS OPERATION The Bendix TABS 6 Adv MC module uses wheel speed sensors modulator relay valves MRVs and an ECU to optimize the contact between the tires and the road surface during a braking event where excessive wheel slip or wheel lock up is detected When a situation is detected where the system needs to intervene the ECU will activate the MRVs to apply controlled brake pressure at the wheel ends Depending on the configuration of the ABS system interventions may be made on individual wheels or pairs of wheels In the case of pairs of wheels the wheels controlled by a modulator may be either on the same side of the vehicle or at both ends of an axle The TABS 6 Adv MC module ECU is able to modulate the brake pressure with greater speed and accuracy than a driver Normal Braking During normal braking the TABS 6 Adv MC module functions as a standard relay valve If the ECU does not detect excessive wheel slip it will not activate the ABS system and the vehicle will stop with normal braking Side Control Independent Control Side control uses a single modulator relay valve to sepa rately control the braking on one or more wheels on each side of the vehicle In the case of braking surfaces with poor overall traction the side control ABS interventio
28. allation Test using the Bendix ACom diagnostic 153 00 612 00 software version 6 1 or higher or Bendix Trailer Information Module If trailer is equipped with a raise lower valve verify it is in the drive position Verify that the ECU parameters for the empty and fully loaded trailer 12 2 ed Load conditions are correct using the Bendix ACom diagnostic software 069 13 1059 13 9 version 6 1 or higher or Bendix Trailer Information Module If necessary contact your local Bendix representative to troubleshoot the trailer s loading condition Manually check the condition of the pads on each brake to determine if any require replacement 12 3 Brake Pads Worn 070 01 1060 01 If no pads require replacement check the wear sensors and cables for damage or defects Check if the trailer s service reservoir pressure is 65 psi 4 5 bar If the trailer s service reservoir pressure is gt 65 psi 4 5 bar 12 4 LOW System J i 254 11 1086 11 Pressure P1 Cycle Ignition power OFF and If the diagnostic code persists contact your local Bendix representative before replacing the TABS 6 Adv MC module 12 8 Frain Information Trailer Information Module and or harness damaged or not present 254 11 0 11 Module Missing Mechanical Load Sensor Spring Suspension Systems Inspect the linkage Check that the linkage is attached to the axle inspect for damage to the linkage 13 4 Load Sensor Error com
29. as per the Installation Guidelines TABS 6 Adv MC module mounted either in 0 or 180 orientation If the ECU has been configured for an external lateral acceleration sensor Check for corroded damaged wiring or connectors between the ECU and the external lateral acceleration sensor Verify correct wiring between the ECU and the external lateral acceleration sensor 099 14 1809 14 External Lateral Acceleration Sensor Signal Not Available Check for corroded damaged wiring or connectors between the ECU and the external lateral acceleration sensor Verify correct wiring between the ECU and the external lateral acceleration sensor After repairs or if no issues are found clear the diagnostic code If the diagnostic code persists contact your local Bendix representative before replacing the Bendix TABS 6 Adv MC module 099 14 1809 14 15 Diagnostic Trouble Codes DTCs continued z J1587 J1939 ten i vip Eagle Possible Causes Repair Information SID SPN igi igi escription FMI FMI Trailer System Braking Verify that there is no residual pressure in the trailer s control Valve Plausibility Service line 9 1 Error Extended After repairs or if no issues are found clear the diagnostic code 057 07 1047 07 Brake Application If the diagnostic code persists contact your local Bendix representative bef
30. at the sensor is registering and verify that the actual trailer load is consistent with the value found 5 Where the value does not appear to be correct using Bendix ACom Diagnostics open the Pressures screen and select Start Read the pressure shown for the airbag port P42 If the load value or pressure value are not as expected open the Configuration screen then the Load and Sensor Configuration tab and select the Load Sensing panel Verify that the current Sensing Type is shown as Internal If not change the selection to Internal Note the values shown on the screen for the shown on the screen for the empty and laden weight and voltage are correct Where the value does not appear to be correct enter the correct value s on the configuration screen If your version of Bendix ACom Diagnostics does not permit you to make these changes update your copy of the program available as a free download from the support pages at www bendix com Note Use a scale to obtain the actual empty trailer weight and use a pressure gauge to obtain actual empty trailer suspension air bag pressure Where possible obtain the load pressure curve from the suspension manufacturer for the specific suspension air bag combination to find the expected values for this vehicle Then rerun the power up sequence Go to Section A M For air suspension system trailers UN current load and pressure Verify that the
31. ay Odometer Mileage To display the trailer odometer mileage apply ignition power and depress release the brake pedal seven 7 times within 15 seconds Following activation there will be a five 5 second delay followed by a blink code display of the odometer information x1000 Example 152 431 miles will be displayed as 152 x1000 or 1 blink pause 5 blinks pause 2 blinks Zeros will be displayed by the ABS indicator lamp strobing twice Odometer mileage cannot be altered with blink code diagnostics Complete odometer information can be retrieved using a diagnostic tool 21 AUXILIARY FEATURES Rear Axle Suspension Dump Some spread axle trailers are equipped with a rear axle suspension air bag dump feature to assist with cornering at low speeds The TABS 6 Adv MC module may be configured to use this feature When this feature is used below a pre determined threshold vehicle speed the ECU will partially exhaust the rear axle air suspension bags and then re inflate them when the vehicle speed rises above the threshold For more information about this feature contact your local Bendix Account Manager by calling 1 800 AIR BRAKE 1 800 247 2725 Lift Axle Control Automatic The TABS 6 Adv MC module can be configured to automatically raise a lift axle when the load on the trailer drops below a configured level Changes to the trailer to allow for this feature include the use of one of the auxiliary outputs to operat
32. ble Code DTC or during the bulb test at start up the module illuminates the ABS indicator lamp by providing a 12 0 VDC signal The other side of the lamp is grounded The ABS indicator lamp output uses pin 5 of the 7 pin connector on the module Dash mounted Lamp PLC Controlled TABS 6 Adv MC modules use SAE J2497 standards to support Power Line Carrier PLC communication The status of the trailer ABS is transmitted over the ignition power wire the blue wire of the J560 connector pin 1 of the 7 pin module connector If there is an active DTC during the bulb check at start up the TABS 6 Adv MC module will transmit a signal over the power line to the towing vehicle s ECU The towing vehicle s ABS controller will then illuminate the trailer ABS indicator lamp mounted on the dash 9 BENDIX WS 24 WHEEL SPEED SENSORS See Figure 4 Wheel speed data is provided to the TABS 6 Adv MC module by the Bendix WS 24 wheel speed sensors Typically the WS 24 wheel speed sensor is installed in a mounting block that is welded to the axle housing The WS 24 wheel speed sensors are protected by a stainless steel sheath They are designed to be used with beryllium copper clamping sleeves sometimes referred to as a retainer bushing friction sleeve or clip See Figure 4 The clamping sleeve provides a friction fit between the mounting block bore and the WS 24 sensor Vehicles have an exciter ring or tone ring as
33. connections in the affected circuit towards the modulator wheel speed sensor etc No voltage or resistance measurements are to be made TABS 6 Adv MC module s power up sequence If it is on the bulkhead connector pins of the module Section A Power Up Sequence Trailer Mounted ABS Indicator Lamp Page 34 Section B Power Up Sequence Dash Mounted ABS Indicator Lamp Page 35 Section C Troubleshooting the Trailer Mounted ABS Indicator Lamp Circuitry Page 36 Section D Troubleshooting the Power Supply Page 37 Section E Troubleshooting the WS 24 Wheel Speed Page 38 Section F Troubleshooting the Load Sensor Out of Range Condition Page 39 SECTION A POWER UP SEQUENCE TRAILER MOUNTED ABS INDICATOR LAMP Observe the ABS Indicator Lamp at Power Up Troubleshoot the trailer mounted ABS indicator lamp circuitry Go to Section C Does the trailer mounted ABS Troubleshoot the trailer mounted ABS indicator lamp circuitry Go to Section C turn OFF indicator lamp stay ON for 6 5 seconds and then Any ignition or brake light power 3 the trailer mounted ABS indicator lamp immediately illuminate when power is applied to the trailer YES Does the trailer mounted ABS indicator lamp stay ON for 2 5 seconds and then turn O
34. disabled the vehicle reverts to normal braking without ABS or TRSP interventions Always repair ABS DTCs at the earliest opportunity ECU Diagnostic Trouble Codes All ABS functions are completely disabled The system reverts to normal braking Voltage Diagnostic Trouble Code The operating voltage range is 8 0 to 32 0 VDC If the voltage is detected as being out of range the ABS and TRSP system braking features will be disabled and the system reverts to normal braking When the correct voltage level is restored full ABS and TRSP is typically available again 20 BLINK CODE DIAGNOSTICS The TABS 6 Adv MC module provides diagnostic functions through blink code diagnostics This means that the technician even without diagnostic tools can read a series of ABS indicator lamp blinks to diagnose the DTCs being generated With no towing vehicle attached enter the blink code diagnostics mode by providing constant power to the ignition circuit and then toggling the brake light power input the specific number of times shown in Chart 5 for the desired mode With a parked towing vehicle attached apply ignition power and after the power up sequence is complete enter the diagnostics mode by depressing and releasing the brake pedal the specific number of times shown in Chart 5 for the desired mode Cycles to Enter Desired Mode Mode Cycles Active DTC Retrieval 3 Inactive DTC Retrieval DTC History 4 Clear
35. e Ground Bendix WS 24 _ Air Below Wheel Speed qu A Brake Lamp Power where used Comm Sensors Ignition B Ignition Power 0 uS p ag p Power C NC IE 9 D Indicator Lamp E Ground Brake Lamp Power 5 Pin ABS Connector T Pin SAE J560 Trailer Chassis Harness Trailer ABS Control Line Bendix TABS 6 Supply Line Advanced SR 5 Trailer Multi Channel Spring Brake Valve ABS Indicator Lamp Semi Trailer Tandem Axle Trailer Load Sensor S C 5 m PO Bendix WS 24 Wheel Speed END Sensors Left Road Side FIGURE 35 BENDIX TABS 6 ADV MC MODULE 4S 2M AXLE CONTROL SYSTEM WITH REAR LIFT AXLE 33 Troubleshooting Flowcharts Diagnostic trouble code information can be retrieved from the Bendix TABS 6 Adv MC module by using blink code diagnostics or a diagnostic tool The following troubleshooting flowcharts will help the technician isolate the cause and confirm whether the problem resides in the component wiring or connectors Troubleshooting should always begin by observing the dash or trailer mounted ABS indicator lamp during the necessary to take electrical measurements always begin by taking voltage and resistance measurements at the 7 pin ECU pigtail harness connector Once the source of the problem is found isolate the area needing repair by repeating the measurements at all
36. e vehicle as it moves The TABS 6 Adv MC module must be mounted either facing forward 0 degrees or facing the rear 180 degrees of the trailer to function correctly See Troubleshooting section for full details of acceptable installation locations Note Do not attempt to change the location of the module without contacting Bendix for engineering approval Vehicle Speed The TRSP system obtains information about the vehicle speed and rate of acceleration from the wheel speed sensors Axle Bogie Load The trailer s axle load information is obtained either by the use of a An integrated pressure sensor port P42 of the TABS 6 Adv MC module where a direct reading of the suspension air spring pressure is taken or b If configured for a mechanical spring deflection sensor a voltage reading that is proportional to the spring deflection TRSP Intervention with Driver Actions Itis quite possible that the driver will also apply the brakes before or during a TRSP intervention by the TABS 6 Adv MC module In all cases the Electronic Control Unit ECU monitors the driver s brake application and compares that to the amount of braking the TRSP program has calculated needs to be applied The pressure delivered to the brakes will always be the higher of the two values 5 COMPONENTS Installations of the TABS 6 Adv MC module use the following components Internal Electronic Control Unit ECU The ECU monitors the speed sen
37. e a lift axle control valve 22 DIAGNOSTIC TROUBLE CODES DTCS 3 J1587 J1939 BER e i pee de Possible Causes Repair Information SID SPN igi igi escription FMI FMI D pe _ 1 1 No diagnostic codes The Bendix TABS 6 Adv MC module system is fully operational 000 00 000 00 no diagnostic codes are detected Wheel Speed Sensors WSS 5 S D S E S F Large Air Gap 2 1 Sensor 5 001 00 789 00 3 j Large Air Gap Dynamic Wheel Speed S DTC Bet 002 00 790 00 Sensor S D ynamic Wheel Speed Sensor large air gap between sensor and tone ring 4 4 Large Air Gap Go to Section E on Page 38 003 00 791 00 Sensor S E 5 pou a 004 00 792 00 Sensor S F TEU 001 03 789 03 Sensor 5 001 04 789 04 002 03 790 03 002 04 790 04 Sensor S D Static Wheel Speed Sensor DTC shorted or open sensor wire Go to Section E on Page 38 EE 003 03 791 03 Sensor S E 003 04 791 04 004 03 792 03 Sensor S F 004 04 792 04 Dynamic issu 001 08 789 08 2 3 ee i 001 01 789 01 7 001 02 789 02 002 08 790 08 3 3 mA e D 002 01 790 01 Dynamic Wheel Speed Sensor DTC incorrect wheel speed signal 002 02 790 02 detected while vehicle is in motion 003 0
38. ensor Vertical Linkage Rod Adjustable Linkage with Rubber Link Axle Attachment Bracket Axle Strap Style Fastener Clamp Trailer ABS Indicator Lamp Controlled by the ECU to show the ABS status the trailer ABS indicator lamp illuminates when a Diagnostic Trouble Code DTC is active See Figure 5 If there are no ABS diagnostic trouble codes present when ignition power is applied to the ECU the lamp will illuminate as a bulb check lasting typically two 2 up to six 6 seconds at most FIGURE 5 TRAILER MOUNTED ABS INDICATOR LAMP 12 Sim 4 Pin SAE J1939 CAN Diagnostic Harness K025593 Connector 12 Pin Os0 0 40 Pigtail Harness Harness K027758 ECU Connector 12 Pin ECU 6 pin Auxiliary Harness K048989 4 Pin Sensor Harness 4 Pin SAE J1939 CAN Diagnostic Harness K048988 Harness 4 Pin SAE J1939 CAN 4 Diagnostic Connector 12 Pin ECU Connector Harness K025594 Pigtail Harness 6 pin Auxiliary 5 Pin Power and Indicator Lamp POWER N89 12 Pin Connector T Pin ECU Connector Indicator Lamp X1 Power Harness K022146 ECU Wheel Speed Sensor Extension Harne
39. ensor The program provides the reading of the Sensor Customer Scratch Pad The tester is requested to input data into the fields displayed on the screen This data will be stored in the ECU and also can be stored to a file on the computer or printed out for reference 8 Where a safe location e g restricted access area or test track is available it is possible to road test the ABS function by making an abrupt stop from a vehicle speed of about 20 MPH to check for proper function The wheels should not enter a prolonged lock condition and ABS function should be audible It is the responsibility of the technician to perform this test in a safe location ABS WIRING All connector leads of the Bendix TABS 6 Adv MC module pigtail harness are weather sealed at the connector interface and are clearly labeled for proper installation Bendix provides over molded versions of the TABS 6 wiring harness and Bendix recommends that the complete harness be replaced if corrosion or damage occurs When troubleshooting ABS wiring some general rules should be followed where applicable 1 Check all wiring and connectors to ensure they are secure and free from visible damage e g cuts abrasions etc Check for evidence of wire chafing due to poor routing or poor securing of wires Check connectors for proper insertion and locking Verify that the connector pins are properly greased with a non conductive electrical grease compo
40. ereused Ignition Power pu gt Ignition NC Load Sensor t Power Indicator Lamp where used Ground d Brake Lamp Power 5 Pin ABS TU Connector T Pin SAE J560 Connector Trailer Chassis Harness Trailer ABS Pigtail Harness 4 Control Line Bendix Supply Line TABS 6 Bed Advanced SR 5 Trailer Multi Channel Spring Brake Valve P22 ABS Indicator Lamp Semi Trailer Tandem Axle Trailer j 6 Left Road Side Bendix WS 24 Wheel Speed Sensor FIGURE 22 BENDIX TABS 6 ADV MC MODULE 2S 2M SIDE CONTROL 0 DEGREE ABS ELECTRICAL amp AIR SYSTEM 2S 2M SIDE CONTROL Fixed Axles 180 Degree Mounting Orientation Right Curb Side Ground A Brakel Bendix WS 24 Wheel Speed Sensor rake Lamp Power iti Air Bellow D ignition n d Power where use d Power D Indicator Lamp o AD i 5 E Ground v Brake Lamp Power 5 Pin ABS Connector T Pin SAE J560 mii Connector Trailer Chassis Harness Trailer ABS Pigtail Harness Control Line Supply Line Bendix W SR 5 Trailer 1x8 Spring Brake D Valve Advanced EE Multi Channel Load Sensor S D where used D B ABS Indicator Lamp Semi Trailer Tandem Axle Trailer Bendix WS 24 Wheel
41. est with an active ABS DTC 10 Power Application ABS System Status Indicators Trailer mounted ABS ON Indicator Lamp ofr Dash mounted Trailer ow ABS Indicator Lamp PLC Detectedy OFF Dash mounted Trailer ABS Indicator Lamp PLC Not Detected OFF ON Some vehicle manufacturers may illuminate the trailer ABS indicator lamp at power up regardless of whether a PLC signal is detected from the trailer or not Consult the vehicle manufacturer s documentation for more details FIGURE 9 TRAILER ABS LAMP POWER UP SEQUENCE 16 ODOMETER FUNCTION Odometer The TABS 6 Adv MC module includes an odometer function to provide a means of storing the accumulated mileage of the vehicle The mileage is computed by using information received from the vehicle wheel speeds sensors This feature is accurate to within 0 62 miles per power up and will typically store mileage up to 1 000 000 miles The mileage can be displayed using PC diagnostics a Bendix Trailer Information Module Bendix Trailer Remote Diagnostic Unit TRDU or through blink codes Whenever the TABS 6 Adv MC module is towed using a pre 1997 tractor with no constant power supplied to the trailer no information about mileage will be stored during that time and the mileage can be considered out of calibration Trip Counter The TABS 6 Adv MC module provides a counter to record the trip mileage The feature can be accessed using PC Diagnostics
42. etention force such as sensor movement and resulting ABS trouble codes See Figure 4 3 Gently push DO NOT STRIKE the sensor into the mounting block hole until it bottoms out on the face of the tone ring Secure the cable lead wire to the knuckle axle housing 3 6 inches from the sensor 4 Apply a moderate amount of dielectric non conductive grease to both the sensor and harness connectors 5 Engage the connectors and push them together until the lock tab snaps into place Itis permissible to use an extra wire retainer part number 300122 or equivalent if available to hold the connectors together The friction fit allows the WS 24 sensor to slide back and forth under force but to retain its position when the force is removed When the WS 24 sensor is inserted all the way into the mounting block and the wheel is installed on the axle the hub exciter contacts the sensor which pushes the sensor back Also normal bearing play will bump the sensor away from the exciter The combination of these two actions will establish a running clearance or air gap between the sensor and exciter CAUTION Wheel bearing maintenance is an important part of keeping the wheel speed sensors in the correct position Excessive wheel end play can result in DTCs in cases where the sensor is pushed too far away from the tone ring for a good signal to be produced Maintain wheel bearings per the manufacturer s recommendations 10 SAE J2497
43. ide Bendix WS 24 Wheel Speed Sensors Ground A Brake Larp Power Air Bellow E e B Ignition Power 3 where use CD eS Ignition C NC oO 5 5 SE Power D Indicator Lamp s n E Ground 7 Brake Lamp Power 5 Pin ABS Connector 7 Pin SAE J560 Connector Trailer Chassis Harness Control Line Q Bendix TABS 6 Supply Line Bendix Advanced SR 5 Trailer Multi Channel Spring Brake Valve ABS Indicator Lamp Semi Trailer Tandem Axle Trailer LoadSensor S D 5 where used QE Bendix WS 24 Wheel Speed Sensors Left Road Side FIGURE 27 BENDIX TABS 6 ADV MC MODULE 4S 2M AXLE CONTROL 180 DEGREE ABS ELECTRICAL amp AIR SYSTEM 29 Troubleshooting System Schematics 45 2 SIDE CONTROL Front Lift Axle DashedHline bax 0 Degree Mounting Orientation Bendix WS 24 Wheel Speed Sensors Right Curb Side S F S D Ground m eR o Air Bellow Ignition B D Load Sensor where used D Spiker C NC 2 D Indicator Lamp E Ground Brake Lamp Power T Pin SAE J560 Connector Control Line Bendix Ez TABS 6 Supply Line e Advanced Bendix mU C EE Multi SR 5 Trailer Channel Spring Brake Valve P22 ABS Indicator Lamp ul Tomo
44. idelines Perform a Lateral Acceleration Sensor installation angle Component Test using the Bendix ACom diagnostic software version 6 1 or higher and verify that the roll angle of the TABS 6 Adv MC module is within x5 as measured from a flat horizontal plane After repairs or if no issues are found clear the diagnostic code If the diagnostic code persists contact your local Bendix representative before replacing the TABS 6 Adv MC module J1587 SID FMI 099 14 J1939 5 1809 14 Internal Lateral Acceleration Sensor Offset Error Before troubleshooting verify that the trailer has been parked on level ground Verify that the TABS 6 Adv MC module has been mounted as per the Installation Guidelines Perform a Lateral Acceleration Sensor installation angle Component Test using the Bendix ACom diagnostic software version 6 1 or higher Verify the roll angle of the TABS 6 Adv MC module is within 5 as measured from a flat horizontal plane If the roll angle is out of tolerance clear the diagnostic code and test drive the vehicle After repairs or if no issues are found clear the diagnostic code If the diagnostic code persists contact your local Bendix representative before replacing the TABS 6 Adv MC module 099 02 1809 02 Lateral Acceleration Sensor Sensor Signal Not Found Verify that the TABS 6 Adv MC module has been mounted
45. iliary Design Language ADL amp Auxiliary I Os J1587 SID FMI J1939 5 11 Auxiliary I O Error AUX WL 7 Check for corroded damaged wiring or connectors between the ECU and ABS Indicator Lamp Check pin X1 5 of the ECU Power connector for the following Pin not pushed back Correctly wired to the ABS Indicator Lamp Pin X1 5 supply Shorted to ground Vpat or other ECU pins Verify the ABS Indicator Lamp is properly grounded and not burnt out After repairs or if no issues are found clear the diagnostic code If the diagnostic code persists contact your local Bendix representative before replacing the TABS 6 Adv MC module 152 12 612 12 11 Auxiliary I O Error AUX I O 1 Check for corroded damaged wiring or connectors between the ECU and the auxiliary device e Check Pins X2 1 amp X2 11 of the ECU In Out I O connector for the following Pins not pushed back Correctly wired to the auxiliary device Pin X2 1 supply pin X2 11 ground Shorted to ground Vpat or other ECU pins Verify the auxiliary device is properly functioning and rated for maximum load of lt 2 amps After repairs or if no issues are found clear the diagnostic code If the diagnostic code persists contact your local Bendix representative before replacing the Bendix TABS 6 Adv MC module 152 12 612 12 11
46. l Line Bendix TABS 6 Supply Line eae SR 5 Trailer Multi Spring Brake Valve ABS Indicator Lamp 44 Semi Trailer Spread Axle Trailer m Load Sensor Bum Sp 0 ug p where used EE Bendix WS 24 C O e Lift Axle Left Road Side FIGURE 33 4S 2M AXLE CONTROL 180 DEGREE WITH REAR LIFT AXLE ABS ELECTRICAL amp AIR SYSTEM 32 Troubleshooting System Schematics 45 2 AXLE CONTROL Front Lift Axle Dashed line box Right Curb Side 0 Degree Mounting Orientation aa coq po denas A Brake Lamp Power oer tea euam a Ignition Power TEN om Sensors Ignition C NC amp 4 e Power D Indicator Lamp Yp S F E Ground Brake Lamp Power 5 Pin ABS Connector 7 Pin SAE J560 Connector Trailer Chassis Harness Trailer ABS Pigtail Harness Control Line Bendix TABS 6 Advanced Supply Line PRY Bendix SR 5 Trailer Spring Brake Valve ABS Indicator Lamp Os 20 Load Sensor where used Semi Trailer Spread Axle Trailer Lift Axle Bendix WS 24 Wheel Speed C D Sensors SS Left Road Side FIGURE 34 BENDIX TABS 6 ADV MC MODULE TYPICAL 4S 2M SYSTEM WITH FRONT LIFT AXLE Dashed line box Pigtail 0 Degree Mounting Orientation Shows Lift Axl
47. n 23 Then check for Dynamic WSS DTCs see left column Then rerun the power up sequence Go to Section A Note Both Static and Dynamic WSS DTCs may be present 000000 000000 See Figure 19 for Usage oe S F S D and S F Sensor See Figure 19 for Usage 9 S C and S E Sensor 6 38 SECTION F TROUBLESHOOTING THE LOAD SENSOR OUT OF RANGE CONDITION Note The indicator lamp for this condition is illuminated only after the vehicle moves C Turn off the power to the module um spring suspension system trailers Verify inspect the following 1 Inspect the load sensor linkage e Check that the linkage is attached to the axle clamp nspect for damage to the linkage components loose connectors and mis installation Check that the load sensor lever rod is a horizontal position with the trailer empty e Verify that the sensor linkage has not flipped over so that it faces the opposite direction 2 Switch on power to the module Using Bendix ACom Diagnostics open the TRSP Sensors screen and press Start Find the load in Ibs that the sensor is registering and verify that the actual trailer load is consistent with the value found Where the value does not appear to be correct perform the load sensor resistance check Unplug the 12 pin connector from the module With the load sensor lever in the horizontal posi
48. n the end covers by sliding the locking tabs to the left Ifthe module is to be reinstalled retain the covers 2 Disconnect the 7 pin ECU connector the 12 pin auxiliary diagnostic harness if present and the two to four 2 pin wheel speed sensor connectors depending on the configuration 3 Mark for reinstallation and then remove all air hoses connected to the TABS 6 Adv MC module 4 Remove the TABS 6 Adv MC module from the vehicle by removing the mounting fasteners SERVICING THE CONTROL PORT FILTER A CAUTION The TABS 6 Advanced MC module has an in line filter in the control port See Figure 2 This filter should be inspected and cleaned if any contamination is found every four months 34 000 miles or 1 200 operating hours For severe applications this inspection interval may be reduced If the filter is found to be damaged install a replacement The filter should also be inspected as part of any troubleshooting where the service brakes are slow to apply and other possible causes have been ruled out REINSTALLATION OF THE BENDIX TABS 6 ADV MC MODULE A CAUTION All service replacement parts for the Bendix TABS 6 Adv MC module are configured specifically by part number As mentioned during the Servicing the Bendix TABS 6 ADV MC Module step ideally before removing the module use Bendix ACom diagnostic software to save the configuration to the desktop The technician can use ACom diagnostics to restore the previo
49. ndition of foundation brakes e Check for corroded damaged wiring or connectors between the ECU and the WSS Make repairs as needed replace wiring and or ABS components Reset active DTC s by using any of the following methods Blink Code Diagnostics Section 20 PC diagnostics Section 23 e Bendix Remote Trailer Diagnostic Unit TRDU and magnet Section 23 Bendix Trailer Information Module Section 23 If you do not reset manually typically these will reset automatically when the vehicle has been driven for a period of time Then rerun the power up sequence Go to Section A M 7 E If Static WSS DTCs are present E Using a volt ohm meter to measure the connector pins of the sensor with a DTC verify 950 1950 OHMS across the sensor connector pins Verify inspect the following e No continuity from sensor connector pins to ground Vbat not measured at either sensor connector pins e Verify there is no continuity between the sensor leads and other sensors Sensor ECU wiring and connectors are not damaged or corroded Proper sensor wire routing and clamping Make repairs as needed replace wiring and or ABS components Reset active DTC s by using any of the following methods Blink Code Diagnostics Section 20 PC diagnostics Section 23 Bendix Remote Trailer Diagnostic Unit TRDU and magnet Section 23 Bendix Trailer Information Module Sectio
50. nds allowing one second between each application Following this activation there will be a five 5 second delay followed by a blink code display sequence of all active DTCs See pages 13 19 for more information about DTCs Display Inactive Diagnostic Trouble Codes DTCs To display inactive DTCs those that are not currently set but have occurred and are stored in the ECUs memory apply ignition power and depress and release the brake pedal four 4 times within 15 seconds Following this activation there will be a five 5 second delay followed by a blink code display sequence of all inactive DTCs stored See pages 13 19 for more information Reset Active Diagnostic Trouble Codes To reset active codes apply ignition power and depress and release the brake pedal five 5 times within 15 seconds Following activation there will be a five 5 second delay followed by a If no DTCs remain a blink code message of 1 1 System Fully Operational No DTCs Detected and the ABS indicator lamp will cease to be illuminated or b If there are remaining active DTCs a sequence of blink codes will display all of the remaining active DTCs and the ABS indicator lamp will stay on Resetting active DTCs with blink code diagnostics does not clear information from trouble code history Both blink code diagnostics or diagnostic tools can retrieve inactive DTCs but only diagnostic tools can clear this information 12 Displ
51. ng Orientation Right Curb Side 180 Mounting Orientation Sensor S D Vehicle Driving Direction 4 D Sensor Sensor EEG 7 22 21 Sensor Sensor S E SD goood Sensor 7 P sF Left Road Side FIGURE 19 WHEEL SPEED SENSOR INSTALLATION 4 5 24 Check the TABS 6 Adv MC module modulator valve s and all air hose fittings for leakage using a soap solution Check the ABS solenoid body with the trailer service brakes fully applied If leakage is excessive more than a single 1 bubble within 1 minute replace the TABS 6 Adv MC module Check the relay exhaust port with the trailer service brakes released to be sure that leakage is less than a single 1 bubble within 3 seconds If excessive leakage is detected at the relay exhaust port perform the following test before replacing the TABS 6 Adv MC module Apply the trailer spring brakes Recheck for leakage around the relay exhaust port If the exhaust port stops leaking this indicates a leak between the emergency and service sides of the spring brake chamber However if the relay exhaust port continues to leak excessively replace the TABS 6 Adv MC module Apply power and monitor the power up sequence
52. ns will maintain the wheels on each side of the vehicle independently at just under the speed where they would lock up Axle Control Axle control uses a single modulator relay valve to control the wheels at both ends of a given axle or multiple axles in cases where a single MRV is controlling several axles In the case of braking surfaces with poor overall traction e g roads that are worn slippery or are made of loose gravel or braking surfaces with areas of poor traction e g asphalt roads with patches of ice axle control ABS interventions will maintain the wheel that is not slipping at just under the speed that will lock the wheel The system permits the other wheel that is experiencing slippage temporary periods of wheel lock during the intervention Axle control should not be used on 5th wheel dollies or steerable axles When intervening on regular traction road surfaces a system configured for axle control performs similar to a side control two modulator system ABS Fail Safe The Bendix TABS 6 Adv MC module is designed to react in a fail safe manner in the event of a system Diagnostic Trouble Code DTC For example if the ECU detects that a sensor is not responding an ABS system DTC will be set and the TABS 6 Adv MC module will illuminate the trailer ABS indicator lamp and revert to a fail safe mode where some or all Advanced ABS functions including TRSP may not function Even in cases where the ABS
53. nued J1587 1939 BER E i peed Coge Possible Causes Repair Information SID SPN igi igi escription FMI FMI Aipdliary Electrical Clear diagnostic codes uxilia ectrica 11 8 Error PH If the diagnostic code persists contact your local Bendix 152 12 612 12 representative before replacing the TABS 6 Adv MC module JusdiancPmaran Verify that the Auxiliary ECU pin outs match the ADL parameters Y 9 using the Bendix ACom diagnostic software version 6 1 higher 11 g Error ADL 152 12 612 12 f necessary contact your local Bendix representative to troubleshoot the ADL program Check if the trailer s service reservoir pressure is 75 psi 5 2 bar If the trailer s service reservoir pressure is gt 75 psi 5 2 bar Low Supply 11 10 Cycle Ignition power OFF and 152 01 612 01 If the diagnostic code persists contact your local Bendix representative before replacing the Bendix TABS 6 Adv MC module Verify that the ADL parameters are correct using the Bendix ACom i diagnostic software version 6 1 or higher 44 14 Ne indicator Lamp g 152 14 612 14 Information ADL If necessary contact your local Bendix representative to troubleshoot the ADL program Miscellaneous Perform scheduled trailer maintenance and or reset the Service C Distance or Date ervice Distance or 12 T Date Exceeded Perform the Inst
54. o ensure that the Bendix TABS 6 Adv MC module has been properly installed on the trailer These include Location and orientation of the module Correct plumbing of the module Correct deflection sensor installation where used Correct location of the wheel speed sensors Configuration of the ECU for ABS amp Bendix TRSP system parameters Installation Test to verify proper installation of the ABS TRSP system Incorrect installation of the TABS 6 Adv MC module system can result in impaired ABS amp TRSP system functions It is the responsibility of the end user to ensure that the TABS 6 Adv MC module system has been installed correctly and tested as per the Bendix recommended installation guidelines and system drawings Prior to performing service to the TABS 6 Adv MC module always perform the following steps 1 Follow all industry safe maintenance practices including those on page 2 of this document 2 Ideally before removing the module use Bendix ACom diagnostic software to save the configuration to the desktop After the module has been replaced the technician can restore the previous configuration settings 3 Turn the power off Drain the air pressure from all reservoirs 5 Remove as much contamination as possible prior to disconnecting electrical connections and air hoses 6 Note the TABS 6 Adv MC module s mounting position on the vehicle 22 REMOVING THE TABS 6 ADV MC MODULE 1 Ope
55. oint between the axles 2 76 cm from center of trailer The TABS 6 Adv MC me must be located no more than 40 inches from the mid point between the axles and within two inches from the center line of the trailer unless configured for an offset FIGURE 18 INSTALLATION ON TRAILER CENTER LINE e With exhaust port facing downward and unobstructed with significant free space below gt 1 inch Within 40 of the center of the axle s for proper balanced brake applications Within x 2 from the center line of the trailer default Note a left right offset greater than 2 may have been programmed in the ECU and can be verified using Bendix ACom diagnostic software version 6 1 or higher Yaw angle shall be 10 as measured from the center line of the trailer Pitch angle shall be 10 as measured from a flat horizontal plane Roll angle shall be within 5 as measured from a flat horizontal plane Frame mount module The TABS 6 Adv MC module uses three Class 8 steel M10x1 5 nuts with lock washers torqued to 354 44 4 in Ibs 40 5 Nm 2 Reconnect all air hoses and plugs to the module Depending on the installation additional plugs may be necessary Thread sealant products that contain Teflon may be used however thread sealant tape is not recommended as there is a potential for tape material entering the valve and affecting the valve s operation Make certain that no thread sealant enters
56. or the Bendix Trailer Information Module Service Interval The TABS 6 Adv MC module provides a feature that can be used to indicate a service interval for the trailer The Service interval can be accessed using PC diagnostics or the Trailer Information Module If configured the TABS 6 Adv MC module can flash the indicator lamp when the vehicle is at standstill to indicate when the service interval has been exceeded 17 NON STANDARD TIRE SIZE The Bendix TABS 6 Adv MC module allows for tire rolling radius and tone ring tooth count parameters to be set for the axle being sensed using the Bendix ACom diagnostic software These adjustments may be necessary for the module to accurately calculate the vehicle velocity and odometer mileage Wheels of the same axle must have and be set to the same rolling radius and tone ring tooth count Refer to the manufacturer s tire specification for correct values The tone ring size is defaulted to 100 teeth and the tire rolling radius is defaulted to 511 revolutions per mile These parameters can be adjusted as shown in Chart 4 Tone Ring Tire Rolling Radius Size Allowable Range 60 teeth 712 to 1005 rpms 80 teeth 512 to 801 rpms 90 teeth 456 to 711 rpms 100 teeth 410 to 640 rpms 120 teeth 356 to 502 rpms CHART 4 TONE RING SIZE TO TIRE ROLLING RADIUS 18 DIAGNOSTIC TROUBLE CODE DETECTION The TABS 6 Adv MC module contains self testing diagnostic circuitr
57. ore replacing the TABS 6 Adv MC module Check for corroded damaged wiring or connectors between the ECU and the WSS Check the air gap between the sensor and tone ring pushing in sensor s if needed Rotate the wheel and verify a min of 0 25 VAC sensor output 0 5 RPS ABS Plausibility Verify the condition of the sensor head 9 2 Error Excessive Verify the condition and retention power of the clamping sleeve 057 07 1047 07 ABS Activity Verify the proper mounting of the exciter ring and condition of the teeth Check the wheel bearings for correct adjustment Verify the sensor wire routing and clamping After repairs or if no issues are found clear the diagnostic code If the diagnostic code persists contact your local Bendix representative before replacing the TABS 6 Adv MC module TRSP Plausibility Clear the diagnostic codes 9 3 Error Excessive f the diagnostic code persists contact your local Bendix 057 07 1047 07 TRSP Activity representative before replacing the TABS 6 Adv MC module 16 Diagnostic Trouble Codes DTCs continued 1587 1939 Sh Possible Causes Repair Information SID igi igi escription FMI FMI TABS 6 Adv MC module Check for damaged or corroded connectors Check for damaged wiring 10 TABS 6 Adv After repairs or if no issues are found clear the diagnostic code 254 42 629 12 Internal Er
58. p Power 5 Pin ABS Connector T Pin SAE J560 Connector Trailer Chassis Harness Trailer ABS Pigtail Harness Control Line i Bendix Supply Line 4 TABS 6 5 Trailer Advanced SA ted Multi Channel Valve ABS Indicator Lamp H Load Sensor S D where used Semi Trailer Tandem Axle Trailer F Bendix WS 24 Wheel Speed Sensors Left Road Side FIGURE 25 BENDIX TABS 6 ADV MC MODULE 4S 2M SIDE CONTROL 180 DEGREE ABS ELECTRICAL amp AIR SYSTEM 28 Troubleshooting System Schematics 4SI2M AXLE CONTROL Fixed Axles _ m 0 Degree Mounting Orientation Right Curb Side Bendix WS 24 Wheel Speed Sensors S F 5 0 Ground Air Below A Brake Lamp Power where used B Ignition Power TA Gum Ignition C NC Bd Power D Indicator Lamp V E Ground a Brake Lamp Power 5 Pin ABS Connector Trailer Chassis Harness T Pin SAE J560 Connector Trailer ABS Pigtail Harness Control Line Supply Line SR 5 Trailer Spring Brake Valve ABS Indicator Lamp Semi Trailer Spread Axle Trailer Load Sensor where used Bendix WS 24 Wheel Speed Sensors Left Road Side FIGURE 26 BENDIX TABS 6 ADV MC MODULE TYPICAL 4S 2M AXLE CONTROL ABS ELECTRICAL amp AIR SYSTEM 45 2 AXLE CONTROL Fixed Axles 180 Degree Mounting Orientation Right Curb S
59. perating Range ECU Active 150 mA 12 VDC ABS Active 2 0 A 12 VDC CHART 1 VALUES FOR OUTPUTS 7 Pin 5 Pin 7 Pin Circuit Trailer ABS ECU Conn Conn Conn Ignition Power PLC Blue Wire 7 e Brake Light Power Red Wire B 2 Ground White Wire 1 E 4 Indicator Lamp White Green Wire UR E 3 CHART 2 POWER AND GROUND Power ABS Indicator Lamp Connector The TABS 6 Adv MC module pigtail uses a TTMA RP 97 99 5 pin Packard Weather Pack connector for brake light power constant power ground and the trailer mounted ABS indicator lamp SAE J1939 CAN Connector See Figure 6 TABS 6 Adv MC module 12 pin auxiliary harnesses typically include a 4 pin connector used for various ECU communications Typical uses include J1939 diagnostics and connection to the Bendix Trailer Information Module Auxiliary I O Connector The TABS 6 Adv MC module 12 pin auxiliary harness provides an option for up to three auxiliary I Os Examples of uses of the auxiliary connector are Lift axle sensing Rear axle suspension air bag dump SAE J1939 Diagnostics Automatic lift axle control External spring deflection sensor for mechanical spring suspensions 8 ABS INDICATOR LAMP Trailer mounted Lamp The Bendix TABS 6 Adv MC module controls an ABS indicator lamp to show the trailer ABS status With power supplied by the towing vehicle if there is an active Diagnostic Trou
60. ponents loose connectors and mis installation 69 13 0 13 If the diagnostic code persists contact your local Bendix representative before replacing the TABS 6 Adv MC module 19 Troubleshooting USING HAND HELD OR PC BASED DIAGNOSTICS Troubleshooting and Diagnostic Trouble Code DTC clearing as well as beginning a reconfiguration may also be carried out using hand held or PC based diagnostic tools such as the Bendix Trailer Remote Diagnostic Unit TRDU Bendix ACom diagnostics software or the Bendix Trailer Information Module 23 BENDIX ABS DIAGNOSTIC TOOLS ACom Diagnostic Software ACom diagnostic software version 6 1 or higher is an RP 1210 compliant PC based diagnostic software program that provides the highest level of diagnostic support for the Bendix TABS 6 Adv MC module With Bendix ACom diagnostic software maintenance personnel can Obtain DTC information both active and inactive DTCs Retrieve event history Clear inactive DTCs and event history Verify ECU configuration Perform system and component tests e Read write customer information in the scratch pad Save and print information Receive troubleshooting assistance When diagnosing the Bendix TABS 6 Adv MC module using a PC and ACom diagnostic software the computer s serial or parallel port can be connected to the vehicle s diagnostic connector through an RP 1210 compliant communications device
61. power lines resulting in a high voltage drop across the lines Measure the voltage under load by placing a load such as a type 1157 brake light bulb between the Ignition Power pin and Ground pin of the ECU connector while the lamp is in place With ignition power to the trailer measure the voltage between the Ignition Power pin 1 and Ground pin 4 of the ECU connector Repeat the voltage measurement with brake lamp power to the trailer between the Brake Lamp Power pin 2 and the Ground pin 4 of the ECU connector The operating range of the module is 8 0 32 0 VDC Verify that the voltage drop measurements are no less than 1 0 VDC from the vehicle voltage at both the ignition and co power inputs with a volt ohm meter check UN the power and ground wiring Look for corroded or damaged wires or connectors z If repairs are made rerun the power up sequence Go to Section A If proper loaded and unloaded voltage is measured at the ECU connector and no corrosion or damage is found on the wiring connectors or ECU replace the dule d sf POWER SUPPLY Turn off the power to the module disconnect the 7 pin ECU connector With ignition power to the trailer engine running measure the voltage between the ignition Power pin and the Ground pin of the ECU connector Repeat the voltage measurement with brake lamp power to the trailer
62. r or under voltage condition To pinpoint the root cause and to ensure the system DTC is properly corrected the first time additional troubleshooting may be necessary Note When a TRDU tool is connected to a system with a Bendix TABS 6 Adv MC module and has established communications the ECU will use the ABS indicator lamp to blink codes for all active DTCs Bendix TRDU Tool Reset Function The magnetic reset switch is located by the letter B in the Bendix logo on the top of the TRDU tool When a magnet with minimum of 30 gauss is held over the switch for less than 6 seconds the clear DTCs command is sent If a magnet is not available you may use a spare wheel Speed sensor since its internal magnet will be sufficient Additionally it is recommended at the end of any inspection that the technician switches off and restores the power to the ABS ECU and then re checks the ABS indicator lamp and TRDU tool to see if they indicate any remaining DTCs Bendix Trailer Information Module The Bendix Trailer Information Module is a display device that combines the functionality of system diagnostics with the ability to display and store other trailer related information of value to an operator driver or workshop Maximum benefit is obtained from the Trailer Information Module functionality when it is mounted on the trailer so that it is able to record events that occur during driving Alternatively it may also be used as a work
63. r pressure is 123 psi Internal Pressure 8 5 bar 7 5 Sensor Range After repairs or if no issues are found clear the diagnostic code 151 12 1086 12 Supply Port P1 If the diagnostic code persists contact your local Bendix representative before replacing the TABS 6 Adv MC module Lateral Acceleration Sensor Before troubleshooting verify that the trailer has been parked on level ground Verify that the TABS 6 Advanced MC ECU has been programmed with the proper ECU orientation tire size and tone ring settings Verify that the TABS 6 Advanced MC module has been mounted as T per the Installation Guidelines i 8 1 Sensor Signal The configured ECU orientation matches the actual ECU 099 14 1809 14 orientation Mounting Error Verify that all wheel speed sensors are installed correctly correct axle left right See Figure 19 After repairs or if no issues are found then clear the diagnostic codes If diagnostic code persists contact the BCVS local representative before replacing the TABS 6 Advanced MC module 14 Diagnostic Trouble Codes DTCs continued ist 2nd Digit Digit Diagnostic Code Description Lateral Acceleration Sensor Signal Out Of Range Possible Causes Repair Information Before troubleshooting verify that the trailer has been parked on level ground Verify that the TABS 6 Adv MC module has been mounted as per the Installation Gu
64. referred to as doubles or triples The TABS 6 Adv MC module shall not be installed on towing trailers that can be used for double or triple trailer applications including B trains A WARNING For vehicles installed with spring suspension systems care must be taken to prevent damage to the load sensor when lifting the trailer The linkage rod must be disconnected from the sensor s rubber boot whenever the frame of the trailer is lifted dropping the axle s This includes situations where a jack is used on the rear bumper or when a crane is used to lift the trailer A WARNING Operating the vehicle with a damaged disconnected load sensor could lead to a serious accident The Bendix Advanced Trailer ABS used on this vehicle uses sensors including the load sensor to assist the Trailer Roll Stability function The TRSP system reduces the risk of roll overs during driving by automatic application of the service brakes when the system detects potential rollover conditions This is accomplished with monitoring sensors both at the trailer wheel ends and within the Bendix TABS 6 Adv MC module The Bendix TRSP system reacts by applying the trailer service brakes and slowing the vehicle combination The Bendix TRSP system uses the following sensors Lateral Acceleration A lateral accelerometer is located within the Bendix TABS 6 Adv MC module This sensor detects the lateral motion or roll of th
65. risk of roll overs 9 Bendix WS 24 Wheel Speed Sensors 8 by automatically applying the brakes when a risk of roll over 10 SAE J2497 PLC Diagnostic Link 9 is detected 11 SAE J1939 CAN Diagnostic Link 9 12 Auxiliary llle 9 morue 13 Bendix ABS Flex 10 e Amodular design with an integrated Electronic Control Unit 14 Customer Scratch 10 ECU pressure sensors a lateral acceleration sensor and 15 Power Up 10 Modulator Relay Valves MRVs eliminating external 16 Odometer Function 10 pigtail harnesses for these components 17 Non Standard Tire 11 e An operating voltage range of 8 32 volts 18 Diagnostic Trouble Code Detection 11 X 19 Partial ABS Shutdown 11 e odometer with trip counters amp service interval 20 Blink Code Diagnostics FET i 21 Auxiliary 12 e A scratch pad feature with up to 1 008 bytes of freely 22 Diagnostic Trouble Codes DTCs 13 19 definable read write text space available for customer use Troubleshooting 20 40 e extended data logging feature including a resettable drive recorder 2 SAFE MAINTENANCE PRACTICES A WARNING PLEASE READ AND FO
66. ror If the diagnostic code persists contact your local Bendix representative before replacing the Bendix TABS 6 Adv MC module Verify the ECU parameters and actual system installation are compatible using the Bendix ACom diagnostic software version 6 1 or higher 10 254 13 629 13 Configuration Error Re program the as necessary If necessary contact your local Bendix representative to obtain the correct configuration data Verify the ECU parameters and actual system installation are compatible using the Bendix ACom diagnostic software version 6 1 TABS 6 Adv MC or higher 18 EEPROM Error Re program the ECU as necessary 294113 629 13 If necessary contact your local Bendix representative to obtain the correct configuration data Re program the ECU to be compatible to the actual system TABS 6 Adv MC Not configuration using the Bendix ACom diagnostic software version 10 Configured 6 1 or higher 254 13 629 13 If necessary contact your local Bendix representative to obtain the correct configuration data TABS 6 Adv MC Perform the Installation Test using the Bendix ACom diagnostic 10 EOL Test Not software version 6 1 or higher or Bendix Trailer Information 254 14 629 14 Completed Module 17 Diagnostic Trouble Codes DTCs continued 1st 2nd Diagnostic Code Digit Digit Description Possible Causes Repair Information Aux
67. shop tool to access diagnostic information or to check the configuration or run an installation test In both cases the Trailer Information Module is connected to the J1939 EC5V CAN connection of the auxiliary connector which supplies the necessary information FIGURE 15 TRAILER INFORMATION MODULE ADDITIONAL SUPPORT AT www bendix com For the latest information and for free downloads of literature and the Bendix ACom diagnostics software and its User Guide visit the Bendix website at www bendix com Bendix Technical Assistance Team For direct personal technical support call the Bendix technical assistance team at 1 800 AIR BRAKE 1 800 247 2725 Monday through Friday 8 00 a m to 6 00 p m EST Alternatively you may e mail the Bendix Tech Team at techteam bendix com 21 To better serve you please record the following information before you call the Bendix Tech Team or include this information in your e mail Bendix product model number part number and configuration e Vehicle make and model Vehicle configuration Number of axles tire size etc System performance symptoms When do they occur What DTCs have been identified using LEDs blink codes or diagnostic tools What troubleshooting measurements have been performed e What Bendix service data literature do you have or need SERVICING THE BENDIX TABS 6 ADV MC MODULE CAUTION Special considerations need to be taken t
68. sor signals lateral accelerometer sensor signal and various pressure sensors and if configured external spring deflection sensor to determine when ABS and or TRSP intervention is required When needed the ECU actuates the appropriate pressure modulator valves to optimize the brake pressure The ECU monitors the system to detect and warn the driver of any malfunctions Diagnostic Trouble Codes DTCs are stored in the ECU and can be reviewed to diagnose the TABS 6 Adv MC module system Lateral Accelerometer Sensor The lateral accel erometer sensor senses the lateral movement of the trailer and sends an electrical signal directly propor tional to the trailer s lateral acceleration to the ECU Supply Pressure Sensor non serviceable and located within the module Internal Load Sensor For air suspension systems the load sensor port P42 must be plumbed to a fixed axle air ride bellows Note the sensor must not be plumbed to a lift axle bellows since they are not charged when the axle is not being used The function of this sensor is to monitor the pressure and send an electrical signal directly proportional to the trailer s axle load to the ECU Brake Demand Pressure Sensor This sensor monitors the trailer service brake pressure being applied by the driver and sends an electrical signal directly proportional to the driver s brake demand to the ECU Brake Delivery Pressure Sensors These sensors P21 P22 monitor the
69. ss 6000365 To WS 24 Wheel Speed Sensor FIGURE 6 EXAMPLES OF PIGTAIL WIRE HARNESSES Pigtail Wiring Harness A power pigtail harness is required Auxiliary harnesses are available as needed See Figure 6 LiftAxle Sensing Ifa trailer is equipped with a lift axle then lift axle sensing must be used unless configured for automatic lift axle control see below pressure threshold switch must be installed in the lift bag for the lift axle and connected to the ECU The ECU can then monitor the position of the lift axle and will compensate correctly for the load transfer to the other axle s when the lift axle is raised Lift Axle Control The Bendix TABS 6 Adv MC can be configured to automatically raise and lower lift axle s when a pre configured load is sensed Load Sensor lf a trailer is equipped with an external electrical spring deflection sensor See Figure 3 a linkage is attached to an axle but must not be installed on a lift axle within 5 five inches of the center of the axle connects to a load sensor attached to the chassis of the vehicle The output from the sensor is an electrical signal that is proportional to the spring deflection The connection to the Electronic Control Unit ECU is via the auxiliary 12 pin connector See Figure 6 6 MOUNTING Frame Chassis Mount The Bendix TABS 6 Adv MC module provides three M10 1 18 in 30 mm studs for frame mounting directly
70. ternal Pressure After repairs or if no issues are found clear the diagnostic code T T Sensor Range If the diagnostic code persists contact your local Bendix 077 12 1067 12 Control Port P4 representative before replacing the Bendix TABS 6 Adv MC module See the suspension manufacturer s specifications for load versus pressure Verify that the trailer s air suspension pressure is 130 psi and is within the allowable range for the specific suspension airbag Internal Pressure combination below 5096 of airbag pressure at the unladen weight or 7 2 Sensor Range above 50 of airbag pressure at GVWR for axles 069 12 1059 12 Load Port P42 After repairs or if no issues are found clear the diagnostic code If the diagnostic code persists contact BCVS local representative before replacing the TABS 6 Adv MC module Internal Pressure Perform a Pressure Component Test using the Bendix ACom 7 3 Sensor Range diagnostic software version 6 1 or higher 059 12 1049 12 Delivery Port P21 Verify the trailer s control service and brake delivery pressures are comparable and lt 130 psi Internal Pressure 7 4 Sensor Range After repairs or if no issues are found clear the diagnostic code 062 12 1052 12 Delivery Port P22 If the diagnostic code persists contact your local Bendix representative before replacing the TABS 6 Adv MC module Verify the trailer s service reservoi
71. tinuity from the ABS indicator lamp pin pin 5 of the ECU connector to the ABS indicator lamp connector If repairs are made rerun the power up sequence Go to Section A If the condition persists replace the ABS module Thetrailer mounted ABS indicator lamp remains ON during the power up sequence Determine if a module Diagnostic Trouble Code DTC exists using any of the following methods Blink code diagnostics Section 20 PC diagnostics Section 23 Trailer Remote Diagnostic Unit Section 23 or Bendix Trailer Information Module also Section 23 If DTC s exist and repairs are made rerun the power up sequence Go to Section A Continue if no DTCs are found and the ABS module appears to be functioning normally with power off to the ABS T module disconnect the 7 pin ECU connector Using a volt meter verify that there is not a short to the Vbat between the ABS WL pin of the ECU connector and the ABS indicator lamp connector If repairs are made rerun the power up sequence Go to Section A If the condition persists replace the module Looking into the Bendix TABS 6 Adv MC Module 7 pin Connector Pigtail Harness Pin 4 is the ground pin Pin 5 is the ABS indicator lamp pin SECTION D TROUBLESHOOTING THE Check for high resistance corrosion wire connector damage or improper termination of the
72. tion verify that approximately 2 5K Ohms is measured between pins four 4 and five 5 and between pins five 5 and six 6 Using Bendix ACom Diagnostics open the configuration screen then the Load and Sensor Configuration tab and select the Load Sensing panel Verify that the current Sensing Type is shown as External If not change the selection to External Where the value does not appear to be correct enter the correct value s on the configuration screen If your version of Bendix ACom Diagnostics does not permit you to make these changes update your copy of the program available as a free download from the support pages at www bendix com Note Use a scale to obtain the actual empty trailer weight and use a pressure gauge to obtain actual empty trailer suspension air bag pressure Where possible obtain the load pressure curve from the suspension manufacturer for the specific suspension air bag combination to find the expected values for this vehicle x Then rerunthe powerup sequence Goto SOROR Verify inspect the following 1 Check that port P42 is connected by an unkinked air hose to the primary suspension air bags 2 Check that the suspension height control valve is functioning correctly 3 Check for air leakage the suspension system 4 Switch on power to the module Using Bendix ACom Diagnostics open the TRSP Sensors screen and select Start Find the load in Ibs th
73. to verify proper system operation See Section 15 Calibrate and set odometer parameters if necessary using a diagnostic tool See Section 16 Perform an installation test using a diagnostic tool Minimum tests that are required to verify the proper installation of the ABS TRSP system are ECU Information This test provides the user with specific ECU information It is required that no DTC s other than end of line test not completed are present and that the ECU has been configured Wheel End Sequence Test During this test checks are carried out that verify the correlation of the wheel installed with a Wheel Speed Sensor and the Pressure Modulator that controls the pressure to the associated brake Lateral Acceleration Test The installation angle information is retrieved from the ECU and compared to the predefined limits 5 degrees This test verifies that the unit is installed as close to horizontal as possible Pressure Sensor Test During this test checks are carried out that verify that the proper response is received from the pressure sensors during a brake application Axle Load Sensing Test Air Ride The test has the user verify the expected measurement of the load pressure sensor Port 42 for air ride suspensions The program provides the reading of the sensor Mechanical Load Sensor Test Mechanical Spring Ride The test has the user verify the expected measurement of the spring deflection s
74. tractor ABS unit to illuminate the dash mounted trailer ABS indicator lamp Diagnostic tools are available that detect the presence of a PLC signal and perform further system diagnostics directly using the power line For more information on these diagnostic tools contact Bendix or refer to your local authorized Bendix dealer or distributor An oscilloscope can also be used to verify the presence and strength of a PLC signal on the power line The PLC signal is an amplitude and frequency modulated signal Depending on the load on the power line the amplitude of the PLC signal can range from 2 5 mV p p to 7 0 V p p Suggested oscilloscope settings are AC coupling 1 volt div 100 usec div The signal should be measured on pin 7 of the J560 connector at the nose of the trailer 11 SAE J1939 CAN DIAGNOSTIC LINK The TABS 6 Adv MC module provides a data link for transmitting CAN information following the SAE J1939 standard Bendix ACom diagnostics software version 6 1 and higher and the Bendix Trailer Information Module both support CAN communication with the TABS 6 Adv MC module Ignition power must be provided to the TABS 6 Adv MC module for the diagnostic link to be active 12 AUXILIARY I O The TABS 6 Adv MC module provides for up to six auxiliary input output I O functions See Chart 3 12 Pin N Auxiliary Functi Auxiliary ame Conn uxiliary Functions Type X2 Aux 1 0 1
75. trailer connector and the J560 connector of the towing vehicle that has the ignition on all the LEDs will illuminate and the green LED will flash 4 times to indicate communications have been established If the ABS ECU has no active Diagnostic Trouble Codes DTCs only the green LED will remain illuminated If the ABS ECU has at least one active DTC the TRDU tool displays the first DTC by illuminating the red LEDs indicating the malfunctioning ABS component and its location on the vehicle See Figure 13 FIGURE 13 THE BENDIX TRDU TOOL DISPLAY LED Diagnostic Trouble Codes VLT Power MOD3 Modulator 3 ECU ABS Controller LFT Left SEN Wheel Speed RHT Right Sensor ADD Additional MOD1 Modulator 1 ODO Odometer MOD2 Modulator 2 LEDs Green VLT Blue ODO All others are Red Example If the DTC is Right Additional Sensor the TRDU tool will display one green and three red LEDs FIGURE 14 DIAGNOSTIC TROUBLE CODES USING THE BENDIX TRDU TOOL If there are multiple DTCs on the ABS system the TRDU tool will display one DTC first then once that DTC has been repaired and cleared the next code will be displayed The TRDU tool repeatedly blinks out the mileage stored once communications have been established By counting the sequence of blinks and or strobes on the blue LED the odometer reading is given See Section 10 for more details VLT Flashing indicates either ove
76. und Connector terminals must not show signs of corrosion or exposure to the environment Never pierce wire insulation when checking for continuity Do not deform individual pins or sockets during probing with a volt ohm meter It is strongly recommended that all wiring harnesses and sensor leads are properly secured at least every 18 inches Apply a moderate amount of non conductive electrical grease to each connector pin before reconnecting 25 Troubleshooting Electrical Schematics SENSOR S D 7 WAY SAE J560 CONNECTOR
77. us configuration settings Always verify that the correct service replacement ECU is being installed by verifying that the part number is the same as the original TABS 6 Adv MC module To verify proper installation perform the Installation Test using the Bendix ACom diagnostic software version 6 1 or higher or use the Bendix Trailer Information Module Inspect the original mounting hardware If it is in good condition it can be reused for installation If replacement hardware is needed use Class 8 steel M10 x 1 5 nuts and lock washers for frame mounting Inspect the location selected for installation and clean as necessary NOTE Inspect all components including the replace ment TABS 6 Adv MC module for any external damage such as cracked valve ports electronic housings etc Any components found to be damaged should not be installed on the vehicle and must be replaced 1 The TABS 6 Adv MC module shall be installed with the following considerations see Figures 16 through 18 considerations see Figures 16 through 18 VERTICAL ORIENTATION ROLL ANGLE MUST BE WITHIN FIVE DEGREES OF VERTICAL i FIGURE 16 INSTALLATION ON TRAILER VERTICAL __ 16 INSTALLATION ON TRAILER VERTICAL 10 10 Driving m _ Longitudinal Orientation Pitch Angle Must be within Ten Degrees of Vertical l FIGURE 17 INSTALLATION ON TRAILER LONGITUDINAL 40 1 m from mid p
78. y that monitors the ABS components and wiring When the TABS 6 Adv MC module senses an erroneous system condition it activates the external trailer mounted ABS indicator lamp disables all or part of the affected ABS and or TRSP functions and it stores the Diagnostic Trouble Code DTC in memory so that the information is retained even when the power is removed The TABS 6 Adv MC module also uses PLC communications to send the system status to the towing vehicle For some trouble codes the TABS 6 Adv MC module will automatically reset self heal the active DTC when the error is corrected e g when a wheel speed sensor is re aligned However repeated occurrences of a given DTC can cause the code to latch that is be retained as active even if the condition is only intermittent Once the code is latched a manual reset will be necessary Technicians can use these latched codes to assist them in troubleshooting intermittent errors After the problem is repaired the DTC can be reset using blink code diagnostics or with a diagnostic tool When a DTC self heals or is manually reset the code remains stored as an inactive DTC in the ECU memory This inactive DTC can be retrieved using blink code diagnostics or with a diagnostic tool 19 PARTIAL ABS SHUTDOWN Depending on the DTC detected the ABS ECU will partially or completely disable the ABS and or Bendix TRSP functionality In cases where the ABS is completely

BENDIX BW2726 User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents