Home

BENDIX SD-13-4983 User's Manual

1. TT JL 9 8 Z vLE L 9 ez 8 G L 67 548 E 3y DUU Do ez gt DTV pug uud7 yyy KE a 5 GE zz EE gt SS E 555 7h 5 5 E 55 SS S SS SSS ZSS SSS D se Q o pdp es 56 OO E 22g cag KEE ce ig oH BH lt lt lt Fee ag Lc OLN sg E 6644 es 393 lt lt S s p b s l a d z lolo el ouo one ou 99y 2229 2 S om Z ee Ge SE Fre aaa 2 EE a ee SS rrr EK Fee pana Fae dg g 66 2 ke Gg gt gt S poz oT a 2 DOT DROZ zor boi Qn gt D DO o 2 meg mer v 9 DS m E meer meer 65 Do 5 5 PS0 DS Z d FSo0 M55 rgo F565 9 2 a x fo oon Im 7 on FIGURE 17 BENDIX EC 80 ABS WIRING SCHEMATIC 6S 6M 36 Troubleshooting Bendix EC 80 ATC Wiring Schematic 6S 5M Be x lt Ka aasn LON aasn LON dasn LON Tae vv ANd NWO WV ANd OTI WV ANd 1V SSM 1V SSM AXLE WSS ADD RIGHT LEFT ADDITIONAL AXLE Packard Pin B Pin C Pin A YY SSM UV SSM x NWO 220 E P 8 3 3310 e EE LNdLNO LAANI di kd AXLE WSS ADD Pin 1 Z LNAdLNO LNANI Wei eg Twist Lock Pin 2 Pin 3 OFF ROAD SWITCH ORS ae ABS SYO SAV bid eaa IS SSM 1S SSM WSS AXLE Pressure Modulator Valves Common CMN Hold HLD Release REL Connector us SSM YS SSM STEER STEER AXLE WSS RIGHT LEFT 134 1S AWd NWO 1S ANd OIH 1S AWd LEFT PMV OU
2. G ats General ist and Diagnostic Trouble Code Description Digit Digit 934 3 Pressure Modulator Valve 9 5 DA Left PMV HLD Solenoid Shorted to Voltage 934 4 Pressure Modulator Valve 9 4 DA Left PMV HLD Solenoid Shorted to Ground 934 5 Pressure Modulator Valve 9 6 DA Left PMV HLD Solenoid Open Circuit 935 3 Pressure Modulator Valve 10 5 DA Right PMV HLD Solenoid Shorted to Voltage 935 4 Pressure Modulator Valve 10 4 DA Right PMV HLD Solenoid Shorted to Ground 935 5 Pressure Modulator Valve 10 6 DA Right PMV HLD Solenoid Open Circuit 936 3 Pressure Modulator Valve 16 5 AA Left PMV HLD Solenoid Shorted to Voltage 936 4 Pressure Modulator Valve 16 4 AA Left PMV HLD Solenoid Shorted to Ground 936 5 Pressure Modulator Valve 16 6 AA Left PMV HLD Solenoid Open Circuit 937 3 Pressure Modulator Valve 17 5 AA Right PMV HLD Solenoid Shorted to Voltage 937 4 Pressure Modulator Valve 17 4 AA Right PMV HLD Solenoid Shorted to Ground 937 5 Pressure Modulator Valve 17 6 AA Right PMV HLD Solenoid Open Circuit 938 3 Pressure Modulator Valve 7 2 SA Left PMV REL Solenoid Shorted to Voltage 938 4 Pressure Modulator Valve 7 1 SA Left PMV REL Solenoid Shorted to Ground 938 5 Pressure Modulator Valve 7 3 SA Left PMV REL Solenoid Open Circuit 939 3 Pressure Modulator Valve 8 2 SA Right PMV REL Solenoid Shorted to Voltage 939 4 Pressure Modulator Valve 8 1 SA Right PMV REL Solenoid Shorted to Ground 939 5 Pressure Modulator Valve 8 3 SA Right PMV REL Solenoid
3. For vehicles with dual drive axles 6x4 using a 4S 4M configuration one ABS modulator controls both right side rear wheels and the other modulator controls both left side rear wheels Both wheels on each side receive equal brake pressure during an ABS stop The rear wheel speed sensors must be installed on the axle with the lightest load Dual Rear Axle Control 6S 6M Configuration For vehicles with dual rear axles 6x4 6x2 using a 6S 6M configuration the rear wheels are controlled independently Therefore brake application pressure at each wheel is adjusted according to the individual wheel behavior on the road surface 6x2 Vehicles with 6S 5M Configuration 6x2 vehicles can utilize a 6S 5M configuration with the additional axle a non driven rear axle having two sensors but only one pressure modulator valve In this case the PMV controls both wheels on the additional axle The additional axle wheels would receive equal brake pressure based on the wheel that is currently experiencing the most wheel slip Normal Braking During normal braking brake pressure is delivered through the ABS PMV and into the brake chamber If the ECU does not detect excessive wheel slip it will not activate ABS control and the vehicle stops with normal braking Retarder Brake System Control On surfaces with low traction application of the retarder can lead to high levels of wheel slip at the drive axle wheels which can adversely affe
4. Bendix EC 80 ABS ATC Controllers Bendix EC 80 ABS Controller Two Connectors Are Used Three Connectors Are Used See SD 13 21021 for the Bendix eTrac Automated Air Suspension Transfer System Bendix EC 80 ESP Controllers will be featured in SD 13 4986 INTRODUCTION Bendix EC 80 ABS and ATC controllers are members of a family of electronic Antilock Braking System ABS devices designed to help improve the braking characteristics of air braked vehicles including heavy and medium duty buses trucks and tractors ABS controllers are also known as Electronic Control Units ECUs Bendix ABS uses wheel speed sensors ABS modulator valves and an ECU to control either four or six wheels of a vehicle By monitoring individual wheel turning motion during braking and adjusting or pulsing the brake pressure at each wheel the Bendix EC 80 controller is able to optimize slip between the tire and the road surface When excessive wheel slip or wheel lock up is detected the Bendix EC 80 controller will activate the Pressure Modulator Valves to simulate a driver pumping the brakes However the Bendix EC 80 controller is able to pump the brakes on individual wheels or pairs of wheels independently and with greater speed and accuracy than a driver In addition to the ABS function the ATC version of the Bendix EC 80 controller provides an Automatic Traction Control ATC feature Bendix
5. Wheel Speed Sensors Wheel speed data is provided to the Bendix EC 80 controller from the Bendix WS 24 wheel speed sensor see Figure 2 Vehicles have an exciter ring or tone ring as part of the wheel assembly and as the wheel turns the teeth of the exciter ring pass the wheel speed sensor generating an AC signal The Bendix EC 80 controller receives the AC signal which varies in voltage and frequency as the wheel speed changes Vehicle axle configurations and ATC features determine the number of Bendix WS 24 wheel speed sensors that must be used A vehicle with a single rear axle requires four wheel speed sensors Vehicles with two rear axles can utilize six wheel speed sensors for optimal ABS and ATC performance Diagnostic Blink Code Switch A momentary switch that grounds the ABS indicator lamp output is used to place the ECU into the diagnostic blink code mode and is typically located on the vehicle s dash panel ABS OFF ROAD SWITCH AND INDICATOR LAMP OPERATION A WARNING The ABS off road mode should not be used on normal paved road surfaces because vehicle stability and steerability may be affected When the ECU is placed in the ABS off road mode the ABS indicator lamp will flash constantly to notify the vehicle operator that the off road mode is active Bendix EC 80 ATC controllers use a dash mounted switch to place the ECU into the ABS off road mode In some cases ECUs may also be put i
6. 10 629 12 ECU 13 14 ECU C6 629 12 ECU 13 15 ECU CF 629 12 ECU 13 16 ECU CO 629 14 Miscellaneous 12 28 Air System Mechanical Component 629 14 ECU 13 d ECU 5F3 630 12 ECU 13 6 ECU 6CD 630 12 ECU 13 19 ECU 63 630 12 ECU 13 20 ECU 6E 630 12 ECU 13 10 ECU 5FC 630 13 ECU 13 13 Configuration Mismatch 630 13 ECU 13 2 ECU 5CD 630 13 ECU 13 8 ECU 56 630 13 ECU 13 9 ECU CA3C 630 13 ECU 13 18 ECU CC 630 13 ECU 13 21 ECU 6C 630 13 ECU 13 22 ECU 63C 630 13 ECU 13 25 VIN Mismatch 630 13 ECU 13 26 Valve Configuration Mismatch 639 2 J1939 11 3 J1939 Engine EEC1 Electronic Engine Controller Loss of Communication or Time Out 639 2 J1939 11 2 J1939 Electronic Retarder Timeout or Invalid Signal ERC 639 2 J1939 11 4 J1939 Electronic Engine Controller 2 Timeout or Invalid Message EEC2 639 2 J1939 11 7 Timeout or Invalid Data on ETC7 or VP15 Transmission Message for HSA 639 2 J1939 11 8 Timeout or Invalid Data on XBR Message APPENDIX J1939 SPN and FMI Codes and their Bendix Blink Code Equivalents SPN FMI Bendix Blink Code Equivalent s J1939 J1939 General ue and Diagnostic Trouble Code Description Digit Digit 639 2 J1939 11 10 Seen ee ETC1 Electronic Transmission Controller loss of communication 639 2 J1939 11 11 AUXIO CAN Message Timeout 639 2 J1939 11 12 J1939 Hill
7. Blink Code Equivalents www bendix com For the latest information and for free downloads of the Bendix ACom Diagnostics software and its User Guide visit the Bendix website at www bendix com Bendix Technical Assistance Team For direct telephone technical support call the Bendix technical assistance team at 1 800 AIR BRAKE 1 800 247 2725 option 2 then 1 Monday through Friday 8 00 A M to 6 00 P M ET and follow the instructions in the recorded message Or you may e mail the Bendix technical assistance team at techteam bendix com Troubleshooting Diagnostic Trouble Codes Wheel Speed Sensors 1st Blink Code Location Left Steer Axle Sensor Right Steer Axle Sensor Left Drive Axle Sensor Right Drive Axle Sensor Left Additional Axle Sensor Right Additional Axle Sensor Diagnostic Trouble Code Description Excessive Air Gap Output Low at Drive off Open or Shorted Loss of Sensor Signal Wheel End Erratic Sensor Signal Tire Size Calibration Configuration Error Repair Information Adjust sensor to contact exciter ring Rotate wheel and verify a minimum of 0 25 VAC sensor output at 0 5 RPS Verify condition of sensor head Verify mounting of exciter ring and condition of teeth Verify proper bearing end play Verify condition and retention of clamping sleeve Verify sensor lead routing and clamping Adjust sensor to contact exciter ring Rotate wheel and verify a
8. If the magnet is held over the switch for less than six 6 seconds the clear Diagnostic Trouble Codes command is sent 2 If the magnet is held over the switch for more than six 6 seconds but less than 30 seconds the Bendix ABS self configuration command is sent Additionally it is recommended at the end of any inspection that the user switches off and restores the power to the ABS ECU then check the ABS indicator lamp operation and RDU tool to see if they indicate any remaining DTCs LED Diagnostic Trouble Codes LFT Left ECU ABS Controller RHT Right SEN Wheel Speed DRV Drive Axle Sensor ADD Additional MOD Pressure Modulator STR Steer Axle Valve VLT Power TRC Traction Control Example Ifthe Diagnostic Trouble Code is Right Steer Axle Sensor the RDU unit will display one green and three red LEDs FIGURE 10 DIAGNOSTIC TROUBLE CODES Bendix RDU Communication Problems If the ABS ECU does not respond to the RDU tool s request for Diagnostic Trouble Codes the RDU tool will illuminate each red LED in a clockwise pattern This pattern indicates the loss of communication and will continue until the ABS ECU responds and communication has been re established Possible sources of communication problems are 1 A problem with the J1939 link at the in cab off board diagnostic connector 9 Pin 2 The ECU does not support PID194 3 No power is being supplied t
9. The Bendix EC 80 ATC controller has an optional control mode to permit this desired performance The vehicle operator can activate the off road function with a switch on the dash panel Alternately a J1939 message may be used to place the vehicle in this mode The ATC indicator lamp will flash continually to confirm that the off road ATC function is engaged To exit the ATC off road mode depress and release the ATC off road switch Drag Torque Control Functional Overview Bendix EC 80 ATC controllers have a feature referred to as drag torque control which reduces wheel slip on a driven axle due to driveline inertia This condition is addressed by increasing the engine torque to overcome the inertia Drag torque control increases vehicle stability on low traction road surfaces during down shifting or retarder braking DYNAMOMETER TEST MODE A WARNING ATC must be disabled prior to conducting any dynamometer testing When the Dynamometer Test Mode is enabled ATC brake control and engine control along with drag torque control are turned off This test mode is used to avoid torque reduction or torque increase and brake control activation when the vehicle is operated on a dynamometer for testing purpose The Dynamometer Test Mode may be activated by pressing and releasing the diagnostic blink code switch five 5 times or by using a hand held or PC based diagnostic tool The Dynamometer Test Mode will rem
10. ATC can improve vehicle traction during acceleration plus lateral stability while driving through curves ATC utilizes Engine Torque Limiting ETL where the ECU communicates with the engine s controller and or Differential Braking DB where individual wheel brake applications are used to improve vehicle traction Bendix EC 80 ATC controllers also have the capability to provide a Hill Start Assist HSA feature HSA interfaces FIGURE 1 BENDIX EC 80 ABS AND ATC CONTROLLERS A WARNING The driver is always responsible for the control and safe operation of the vehicle at all times The Bendix ABS system does not replace the need for a skilled alert professional driver reacting appropriately and in a timely manner and using safe driving practices TABLE OF CONTENTS Introduction Component ECU Mounting ABS Off Road Switch and Indicator Lamp Operation Bendix EC 80 Controller Outputs Indicator Lamp Behavior Power Up Sequence ABS Operation ATC Operation Dynamometer Test Mode Automatic Tire Size Calibration ABS Partial Shutdown System Reconfiguration Blink Codes Diagnostic Modes Using hand held or PC based diagnostics Diagnostic Trouble Code Index Troubleshooting Wiring Glossary Appendix J1939 SPN and FMI Codes between the transmission and braking system to help the driver prevent the vehicle from rolling backwards when moving forward from a stationary position on steep inclines
11. Bendix EC 80 ATC controllers have a drag torque control feature which reduces driven axle wheel slip due to driveline inertia by communicating with the engine s controller and increasing the engine torque COMPONENTS ECU MOUNTING The Bendix EC 80 controller s ABS function uses WARNING PLEASE READ AND FOLLOW THESE INSTRUCTIONS TO AVOID PERSONAL INJURY OR DEATH When working on or around a vehicle the following guidelines should be observed AT ALL TIMES A Park the vehicle on a level surface apply the parking brakes and always block the wheels Always wear personal protection equipment Stop the engine and remove the 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 aen SAFETY GUIDELINES e Bendix WS 24 wheel speed sensors 4 or 6 depending on ECU and configuration Each sensor is installed with a Bendix Sensor Clamping Sleeve e Bendix M 32 M 32QR M 40X Pressure Modulator Valves 4 5 or 6 depending on ECU and leaking heated or electrically charged components Do not attempt to install remove disassemble or assemble a component until you have read and thoroughly understand the recommended procedures Use only the pr
12. Bendix EC 80 ATC options ATC is temporarily disabled to prevent excessive heating of the foundation brakes Sensors are reversed left to right on one of the axles Verify proper installation connection and wiring of the sensors Verify no continuity between the Diff Lock Solenoid and ground Check for corroded damaged wiring or connectors between the ECU and Diff Lock Solenoid 27 28 Troubleshooting Diagnostic Trouble Codes Miscellaneous 1st Blink Code 12 Location Miscellaneous Diagnostic Trouble Code Description Diff Lock Solenoid Shorted to Voltage ABS disabled due to off road mode Maximum number of PMV cycles exceeded Maximum Number of TCV Cycles Exceeded ABS Disabled Due to Engaged Interlock UO 3 Shorted High HSA Lamp Open Circuit or Shorted to GND HSA Valve Solenoid is Shorted to GND HSA Valve Sole noid is Shorted to Voltage Air system Mechanical Component Air system Mechanical Component HSA Lamp Shorted to Voltage HSA Lamp Sole noid Open Circuit Repair Information Verify no continuity between the Diff Lock Solenoid and voltage Check for corroded damaged wiring or connectors between the ECU and Diff Lock Solenoid The ABS indicator lamp will be flashing indicating the ECU is in the off road ABS mode Remove and re apply ignition power Replace all PMV valves and clear the DTC Replace all TCV valves and clear the DTC TheABS indicator lam
13. Communications ETC2 Message Repair Information Loss of communications between the Bendix EC 80 controller and other devices connected to the J1939 link Check for damaged or reversed J1939 wiring Check for corroded or damaged connectors Verify ECU Configuration Check for other devices inhibiting J1939 communications Check for damaged or reversed J1939 wiring Check for corroded or damaged connectors Verify presence of retarder on the J1939 link Verify ECU Configuration Verify that the retarder is configured to broadcast ERC1 Check for other devices inhibiting J1939 communications Check for damaged or reversed J1939 wiring Check for corroded or damaged connectors Verify presence of ECU on the J1939 link Verify ECU Configuration Verify the ECU is configured to broadcast EEC1 Check for other devices inhibiting J1939 communications Check for damaged or reversed J1939 wiring Check for corroded or damaged connectors Verify presence of Engine ECU on the J1939 link Verify ECU Configuration Verify that there is an EEC2 broadcast from the address configured in the ABS ECU Check for other devices inhibiting J1939 communications Loss of communications between the Bendix EC 80 controller and the transmission ECU over the J1939 link Check for damaged or reversed J1939 wiring Check for corroded or damaged connectors Verify presence of engine ECU on the J1939 link Verify ECU Configuration Check for other devices inhibiting J19
14. Description Digit Digit 793 2 Wheel Speed Sensor 14 3 AA Left WSS Open or Shorted 793 7 Wheel Speed Sensor 14 5 AA Left WSS Wheel End 793 8 Wheel Speed Sensor 14 6 AA Left WSS Erratic Sensor Signal 793 9 Wheel Speed Sensor 14 2 AA Left WSS Output Low Drive Off 793 10 Wheel Speed Sensor 14 4 AA Left WSS Loss of Sensor Signal 794 1 Wheel Speed Sensor 15 1 AA Right WSS Excessive Air Gap 794 2 Wheel Speed Sensor 15 3 AA Right WSS Open or Shorted 794 7 Wheel Speed Sensor 15 5 AA Right WSS Wheel End 794 8 Wheel Speed Sensor 15 6 AA Right WSS Erratic Sensor Signal 794 10 Wheel Speed Sensor 15 4 AA Right WSS Loss of Sensor Signal 794 14 Wheel Speed Sensor 15 2 AA Right WSS Output Low Drive Off 795 5 Pressure Modulator Valve 7 7 SA Left PMV CMN Open Circuit 795 13 Pressure Modulator Valve 7 8 SA Left PMV Configuration Error 796 5 Pressure Modulator Valve 8 7 SA Right PMV CMN Open Circuit 796 13 Pressure Modulator Valve 8 8 SA Right PMV Configuration Error 797 5 Pressure Modulator Valve 9 7 DA Left PMV CMN Open Circuit 797 13 Pressure Modulator Valve 9 8 DA Left PMV Configuration Error 798 5 Pressure Modulator Valve 10 7 DA Right PMV CMN Open Circuit 798 13 Pressure Modulator Valve 10 8 DA Right PMV Configuration Error 799 5 Pressure Modulator Valve 16 7 AA Left PMV CMN Open Circuit 799 13 Pressure Modulator Valve 16 8 AA Left PMV Configuration Error 800 5 Pressure Modulator Valve 17 7 AA Right PMV CMN Open Circuit 800 13 Pressure Modulator Valve 17 8 AA
15. Knorr Bremse Group All Rights Reserved 07 14
16. N STEER AXLE STEER AXLE 1734 YS AWd NWO YS ANd OH YS ANd STEER STOP LAMP AXLE RIGHT PMV J Caer b 134 1d AWd l NWO Id AWd AH 10 AWd Q 16 12 17 1334 40 ANd NWO Yd ANd OH YO AWd O STOP LAMP SWITCH SLS 10 9 13 ABS INDICATOR LAMP DIAGNOSTIC SWITCH DRIVE AXLE 1518 X 5A Ne 5A Ny 10 11 x1 WSS sis E ONS 1M sav MOOTYALNI 1M 7M sav TM sgy YS TIVE 12V BATTERY TRAILER ABS INDICATOR LAMP 2 1815129 3 NOILINDI ai Q tea Sch ya ONE 94 EEISEVOE OPTIONAL RETARDER RELAY 5A NS z adili IH Geer OT peur P d3sn LON Zio aasn LON 2 YA TRACTION CONTROL VALVE TCV OFF ROAD SWITCH ORS ATC LAMP NWO va AO 4 GES vd AOL be SYO OLW dNV1 OLY TC Al FIGURE 18 BENDIX EC 80 ATC WIRING SCHEMATIC 6S 5M 38 NOTES GLOSSARY ABS Antilock Brake System ABS Event Impending wheel lock situation that causes the ABS controller to activate the modulator valve s ABS Indicator Lamp An amber lamp which indicates the operating status of an antilock system When the indicator lamp is on ABS is disabled and the vehicle reverts to normal brake operation Air Gap Distance between the Sensor and tone ring ASR Automatic Sl
17. Open Circuit 940 3 Pressure Modulator Valve 9 2 DA Left PMV REL Solenoid Shorted to Voltage 940 4 Pressure Modulator Valve 9 1 DA Left PMV REL Solenoid Shorted to Ground 940 5 Pressure Modulator Valve 9 3 DA Left PMV REL Solenoid Open Circuit 941 3 Pressure Modulator Valve 10 2 DA Right PMV REL Solenoid Shorted to Voltage 941 4 Pressure Modulator Valve 10 1 DA Right PMV REL Solenoid Shorted to Ground 941 5 Pressure Modulator Valve 10 3 DA Right PMV REL Solenoid Open Circuit 942 3 Pressure Modulator Valve 16 2 AA Left PMV REL Solenoid Shorted to Voltage 942 4 Pressure Modulator Valve 16 1 AA Left PMV REL Solenoid Shorted to Ground 942 5 Pressure Modulator Valve 16 3 AA Left PMV REL Solenoid Open Circuit 943 3 Pressure Modulator Valve 17 2 AA Right PMV REL Solenoid Shorted to Voltage 943 4 Pressure Modulator Valve 17 1 AA Right PMV REL Solenoid Shorted to Ground 943 5 Pressure Modulator Valve 17 3 AA Right PMV REL Solenoid Open Circuit 1045 2 Miscellaneous 12 2 Stop Lamp Switch Defective 1045 7 Miscellaneous 12 1 Stop Lamp Switch Not Detected 2622 2 Miscellaneous 12 24 HSA Lamp Open Circuit or Shorted to Ground 2622 3 Miscellaneous 12 26 HSA Valve Solenoid Shorted to Voltage 2622 3 Miscellaneous 12 31 HSA Lamp Shorted to Voltage 2622 4 Miscellaneous 12 25 HSA Valve Solenoid Shorted to Ground 2622 5 Miscellaneous 12 33 HSA Valve Solenoid Open Circuit 43 A4 BW2939 2014 Bendix Commercial Vehicle Systems LLC a member of the
18. Start Aid Switch Signal Not Available 639 2 J1939 11 15 J1939 Engine EEC3 Electronic Transmission Controller loss of communications or time out 639 2 J1939 11 16 EE ETC2 Electronic Transmission Controller loss of communications 639 2 J1939 11 3 S e eege GE Engine Controller loss of communications between EC 80 639 2 J1939 11 2 J1939 Retarder ERC1 Electronic Retarder Controller loss of communications or time out 639 2 J1939 11 4 J1939 Engine EEC2 Electronic Engine Controller loss of communications or time out 639 2 J1939 11 10 J1939 Transmission Loss of Communications ETC1 message 639 2 J1939 11 15 J1939 Engine Loss of Communications EEC2 message 639 2 J1939 11 16 J1939 Transmission Loss of Communications ETC2 message 639 12 J1939 11 d J1939 Serial Link Loss of Communication Between EC 80 ECU and Other Devices 789 1 Wheel Speed Sensor 2 1 SA Left WSS Excessive Air Gap 789 2 Wheel Speed Sensor 2 3 SA Left WSS Open or Shorted 789 7 Wheel Speed Sensor 2 5 SA Left WSS Wheel End 789 8 Wheel Speed Sensor 2 6 SA Left WSS Erratic Sensor Signal 789 9 Wheel Speed Sensor 2 2 SA Left WSS Output Low Drive Off 789 10 Wheel Speed Sensor 2 4 SA Left WSS Loss of Sensor Signal 789 13 Wheel Speed Sensor 2 7 SA Left WSS Tire Size Calibration 790 1 Wheel Speed Sensor 3 1 SA Right WSS Excessive Air Gap 790 2 Wheel Speed Sensor 3 3 SA Right WSS Open or Shorted 790 7 Wheel Speed Sensor 3 5 SA Right WSS Wheel End 790 8 Wheel Speed Sensor 3 6 SA Right WSS Erratic Senso
19. corroded damaged Open Circuit wiring or connectors between ECU and TCV TCV The ECU is not configured for ATC but has detected the presence of a TCV Verify Configuration TCV wiring Inspect for the presence of a TCV Verify ECU configuration Error Automatic Traction Control Valve Inspections should include e Looking for kinked air hoses inside the harness socket for removed or corroded connector pins and a test to verify that the ATC valve solenoids are functioning correctly Repair Tests Location Measurement 1 Take all measurements at ECU harness TCV to TCV Common 7 to 19 Ohms connector pins in order to check wire harness TCV or TCV Common Open Circuit no continuity to Voltage or Ground and traction control valve Probe the connector carefully so that the terminals are not damaged Cab mount ECU 2 Tractor Control Valve resistance measurements should read Looking into wire harness connector Connector Pin Traction Control Test x1 4 Traction Control Valve Common 18 Way 5 Traction Control Valve 23 Troubleshooting Diagnostic Trouble Codes Power Supply 1st Blink Code 6 Power Supply Location Diagnostic Trouble Code Description Repair Information Battery Voltage Measure battery voltage under load Check vehicle battery and associated components Too Low Check for damaged wiring Check for damaged or corroded connectors and connections Battery Voltage Measure battery voltage under loa
20. device e Dash mounted ATC status indicator lamp e J1939 serial communication to engine control module e Stop lamp switch input may be provided using the ECU hardware input or J1939 e Optional ATC off road switch The Hill Start HSA function uses the following components e Traction Control Valve TCV e Dash mounted HSA status indicator lamp e Dash mounted Enable Disable switch e RV 3 Pressure Reducing Valve e DC 4 Double Check valve ECU MOUNTING Bendix EC 80 controllers are cab mounted They are not protected against moisture and must be mounted in an environmentally protected location All wire harness connectors must be properly seated The use of secondary locks is strongly recommended A CAUTION All unused ECU connectors must be covered and receive any necessary protection from moisture etc ECUs utilize connectors from the AMP MCP 2 8 product family HARDWARE CONFIGURATIONS Bendix EC 80 ABS Controllers Bendix EC 80 ABS controllers support four sensor four modulator 4S 4M applications Certain models support Power Line Carrier PLC communications with all models supporting 12 volt installations See Chart 1 for more Bendix EC 80 ATC Controllers Bendix EC 80 ATC controllers support applications up to six sensor six modulator 6S 6M installations with ATC and drag torque control They can support HSA functions All 12 volt models support Power Line Carrier PLC 24 volt mode
21. 1 ohms from REL to HLD Check for corroded damaged wiring or connectors between ECU and PMV Verify no continuity between PMV leads and voltage Verify 4 9 to 5 5 ohms from REL to CMN amp HLD to CMN and 9 8 to 11 ohms from REL to HLD Check for corroded damaged wiring or connectors between ECU and PMV Verify 4 9 to 5 5 ohms from REL to CMN amp HLD to CMN and 9 8 to 11 ohms from REL to HLD Check for corroded damaged wiring or connectors between the ECU and PMV Verify 4 9 to 5 5 ohms from REL to CMN amp HLD to CMN and 9 8 to 11 ohms from REL to HLD Check for corroded damaged wiring or connectors between the ECU and PMV A mis match exists between the ECU configuration and the modulator installation and wiring Verify PMV wiring and installation Verify ECU configuration 21 22 Pressure Modulator Valve Repair Tests 1 Take all measurements at ECU harness connector pins in order to check wire harness and PMV Probe the connector carefully so that the terminals are not damaged 2 Pressure modulator resistance should read Location Measurement Release to Common 4 9 to 5 5 Ohms Hold to Common 4 9 to 5 5 Ohms Release to Hold 9 8 to 11 0 Ohms Release Hold Common Open Circuit no continuity to Voltage or Ground A CAUTION When troubleshooting modulator trouble codes check inactive trouble codes and event history for over voltage or trouble codes If one of these is found troubleshoot these trouble codes
22. 39 communications Loss of communications between the Bendix EC 80 controller and the engine ECU over the J1939 link Check for damaged or reversed J1939 wiring Check for corroded or damaged connectors Verify presence of engine ECU on the J1939 link Verify ECU Configuration Check for other devices inhibiting J1939 communications Loss of communications between the Bendix EC 80 controller and the transmission ECU over the J1939 link Check for damaged or reversed J1939 wiring Check for corroded or damaged connectors Verify presence of engine ECU on the J1939 link Verify ECU Configuration Check for other devices inhibiting J1939 communications J1939 Troubleshooting Tests 1 Take all measurements at ECU harness connector 3 2 Check for damaged or reversed J1939 wiring Check for corroded or damaged wiring connector problems such as opens or shorts to voltage or ground 4 Check for other J1939 devices which may be loading down inhibiting J1939 communication Cab mount ECU Looking into wire harness connector Connector Pin J1939 X1 7 J1939 Low 18 Way 8 J1939 High 25 1st Blink Code 13 Troubleshooting Diagnostic Trouble Codes Location ECU Diagnostic Trouble Code Description With HEX designation ECU DTC 5F3 ECU DTC 5CD ECU DTC 10 ECU DTC 2678C ECU DTC 1C ECU DTC 6CD Configuration mismatch ECU DTC 56 ECU DTC CAC3 ECU DTC 5FC ECU DTC F1A EC
23. 4 SYSTEM CONFIGURATION CHECK In this mode the ECU tells the technician by means of a series of six blink codes the type of ABS system that the ECU has been set up to expect For example if the fourth blink code seqiemce is a three the technician knows that a 6S 5M sensor modulator configuration has been set Dynamometer Test Mode The Dynamometer Test Mode is used to disable ATC when needed e g when performing any vehicle maintenance where the wheels are lifted off the ground and moving including dyno testing This mode is not reset by power off power on cycling Instead a hand held or PC based diagnostic tool must be used to change the setting Alternatively depressing and releasing the blink code switch three times will cause the ECU to exit the blink code mode Reconfigure ECU Mode Vehicle reconfiguration is carried out by using the Reconfigure ECU Mode See page 11 Note To enter the Reconfiguration Mode the blink code switch must be held in before the application of ignition power Once the power is supplied the switch is released and then pressed seven times 15 Troubleshooting Using Hand Held or PC Based Diagnostic Tools USING HAND HELD OR PC BASED DIAGNOSTICS Troubleshooting and Diagnostic Trouble Code DTC clearing as well as reconfiguration may also be carried out using hand held or PC based diagnostic tools such as the Bendix Remote Diagnostic Unit RDU Bendix ACom Diagnostics s
24. BBB Jy II Feo Z gobs s seg Stal late 234 Ga el 3 39 22 ago D Q 3 e 537235 99 aca 288 D 8 0 das SE E EE Ek 8 S E E E InN Jotl QR gt gt gt SS S gt gt gt SS ZS an oo 29 D zZ Sc O o o o o 2 22 2255 Aro o 23222 ss 222 222 222 222 2s 6 5 4 1314 78 16 17 1 3 2 1815129 16121 467 13 5 fe OO OO ff 0 D D D Oo OO fe Q Q Q ae Q Q 0S SC A 9 d 3 RETARDER Ee Le RELAY 5A 2 12 VOLT BATTERY INDICATOR P LAMP i 5A ABS INDICATOR LAMP of O KE TRAILER ABS DIAGNOSTIC SWITCH 12 VOLT IGNITION Pressure Modulator Valves Connector Twist Lock Packard Common CMN Pin 2 Pin B Hold HLD Pin 3 Pin C Release REL Pin 1 PinA FIGURE 16 BENDIX EC 80 ABS WIRING SCHEMATIC 4S 4M 35 IC EC 80 ATC Wiring Schemat 6S 6M IX Bendi Troubleshooting y Uld uld 133 se j y 9 Uld Uld CH PIOH g uld c Uld NWO uowwog AMSLIVE AZL pueyoegq y907 SIML JoJOaUUOyD S AJLA JOJEINPOY INSS Jd dg dOLS NOILINSI Zb s18 HOLIM SdWV1 dOLS o __ o che dINV1 YOLYOIONI dW OLY Sav YSTIVYL HOLIMS dvouw s40 x sav KASS suo cy Ba DEE HOLIMS dv suo YOLVOIGNI SV Lo AA WNOILdO Paar ne Ten Ke J1XV IVNOILIGGV J7XY 4331S AK INNA wi aay 1431 LH IY axy gJIXv 43318 393318 N SSM SSM 7085 4907 i fi 2010 yy
25. BS performance Optimum ABS performance is achieved when the lockable differentials are disengaged allowing individual wheel control Bendix EC 80 ATC controllers can be programmed specifically for this configuration to control the differential lock unlock solenoid in the AWD transfer case When programmed to do so the ECU will disengage the locked interaxle AWD transfer case during an ABS event and reengage it once the ABS event has ended ATC OPERATION ATC Functional Overview Just as ABS improves vehicle stability during braking ATC improves vehicle stability and traction during vehicle acceleration The Bendix EC 80 ATC controller s ATC function uses the same wheel speed information and modulator control as the ABS function The ECU detects excessive drive wheel speed compares the speed of the front non driven wheels and reacts to help bring the wheel spin under control The ECU can be configured to use engine torque limiting and or differential braking to control wheel spin For optimal ATC performance both methods are recommended ATC Lamp Operation The ATC lamp illuminates 1 During power up e g when the vehicle is started for approximately 2 5 seconds and turns off after the self test is completed providing no Diagnostic Trouble Codes are present 2 When ATC is disabled for any reason 3 During an ATC event the lamp will flash rapidly at a rate of 2 5 second When ATC is no longer active the ATC active ind
26. H PMV Right Drive Axle Common 12 PMV Left Drive Axle Common 2 Diff Lock Solenoid X3 3 Diff Lock Solenoid Common 15 Way 6 PMV Left Additional Axle Common H PMV Right Additional Axle Common Retarder Relay 1 Measure resistance between retarder disable output of Bendix EC 80 controller and voltage ground Test Measurement Retarder disable to Voltage Open Circuit no continuity or Ground 2 Verify vehicle has retarder relay 3 Verify proper wiring from ECU to retarder relay PMV Commons 1 Measure resistance between any common PMV TCV and Diff and voltage or ground Test Measurement Any PMV TCV or Diff Open Circuit no continuity Common to Voltage or Ground Differential Lock Solenoid 1 Measure resistance between Diff lock solenoid and voltage or ground Test Measurement Diff Lock Solenoid to Voltage Open Circuit no continuity or Ground 29 Troubleshooting Connectors and Harnesses Bendix EC 80 ABS Controller Wire Harness Connector Part Numbers and Pin Assignments Bendix EC 80 ABS CAB Bendix EC 80 ABS Controller Bendix EC 80 ABS versions utilize two AMP connectors for wire harness connections Connectors not used Connector Designation x1 X2 Number of Contacts AMP Part Number 17 1718091 1 18 8 968974 1 Bendix EC 80 ABS X1 Connector Pin Assignments Pin Designation Ground Trailer ABS WL Ignition N
27. HICLE ORIENTATION TYPICAL ABS OPERATION Bendix ABS uses wheel speed sensors ABS modulator valves and an ECU to control either four or six wheels of a vehicle By monitoring individual wheel turning motion during braking and adjusting or pulsing the brake pressure at each wheel the Bendix EC 80 controller is able to optimize slip between the tire and the road surface When excessive wheel slip or wheel lock up is detected the Bendix EC 80 controller will activate the pressure modulator valves to simulate a driver pumping the brakes However the Bendix EC 80 controller is able to pump the brakes on individual wheels or pairs of wheels independently and with greater speed and accuracy than a driver Steer Axle Control Although both wheels of the steer axle have their own wheel speed sensor and pressure modulator valve the Bendix EC 80 controller blends the applied braking force between the two steering axle brakes This Bendix patented brake application control called Modified Individual Control MIC is designed to help reduce steering wheel pull during an ABS event on road surfaces with poor traction or areas of poor traction e g asphalt road surfaces with patches of ice Single Drive Axle Control 4x2 Vehicle For vehicles with a single rear drive axle 4x2 the brakes are operated independently by the Bendix EC 80 controller based on the individual wheel behavior Dual Drive Axle Control 4S 4M Configuration
28. RS 12 ABS WL Ground 18 ABS WL Bendix EC 80 ATC X2 Connector Pin Assignments Pin Designation Pin Designation Pin Designation 1 PMV SA Left HLD 7 PMV SA Right REL 13 PMV DA Right REL 2 PMV SA Left REL 8 WSS SA Left 14 WSS SA Right 3 PMV SA Left CMN 9 PMVDARightCMN 15 WSS DA Left 4 PMV SA Right HLD 10 PMV DA Right HLD 16 PMV DA Left HLD 5 WSS SA Left 11 WSS SA Right 17 PMV DA Left REL 6 PMVSARightCMN 12 PMV DA Left CMN 18 WSS DA Left Bendix EC 80 ATC X3 Connector Pin Assignments Pin Designation Pin Designation Pin Designation 1 ABS ORS 6 PMV AA Left CMN 11 WSS AA Left 2 Diff Lock SOL 7 PMV AA Left REL 12 WSS AA Right 3 Diff Lock SOLCMN 8 Input Output 3 13 PMV AA Right REL 4 PMV AA Left HLD 9 PMVAARightCMN 14 WSS AA Left 5 Input Output 2 10 PMV AA Right HLD 15 WSS AA Right AWD vehicles only AWD Transfer Case 31 Troubleshooting Wiring ABS ATC WIRING ECU Wiring Harness Connectors Bendix EC 80 controllers are designed to interface with AMP MCP 2 8 connectors as referenced in Chart 4 Follow all AMP requirements for the repair of wire harnesses All wire harness connectors must be properly seated The use of secondary locks is strongly advised A CAUTION All unused ECU connectors must be covered and receive proper environmental protection ABS Wiring Requirements As a matter of good practice and to ensure maximum system robustn
29. Right PMV Configuration Error 801 2 Miscellaneous 12 4 Retarder Relay Open Circuit or Shorted to Ground 801 3 Miscellaneous 12 5 Retarder Relay Circuit Shorted to Voltage 802 3 Miscellaneous 12 8 PMV TCV Diff Lock Common Shorted to Voltage 802 4 Miscellaneous 12 7 PMV TCV Diff Lock Common Shorted to Ground 802 12 ECU 13 11 ECU F1A 802 12 ECU 13 12 ECU F14 805 14 Miscellaneous 12 9 ATC Disabled to Prevent Brake Fade 806 3 TCV 18 2 TCV Solenoid Shorted to Voltage 806 4 TCV 18 1 TCV Solenoid Shorted to Ground 806 5 TCV 18 3 TCV Solenoid Open Circuit 806 13 TCV 18 4 TCV Configuration Error 810 7 Miscellaneous 12 11 Wheel Speed Sensors Reversed on an Axle 811 2 Miscellaneous 12 6 ABS Warning Lamp Circuit 815 13 Wheel Speed Sensor 14 10 Additional Axle WSS Configuration Error 932 3 Pressure Modulator Valve 7 5 SA Left PMV HLD Solenoid Shorted to Voltage 932 4 Pressure Modulator Valve 7 4 SA Left PMV HLD Solenoid Shorted to Ground 932 5 Pressure Modulator Valve 7 6 SA Left PMV HLD Solenoid Open Circuit 933 3 Pressure Modulator Valve 8 5 SA Right PMV HLD Solenoid Shorted to Voltage 933 4 Pressure Modulator Valve 8 4 SA Right PMV HLD Solenoid Shorted to Ground 933 5 Pressure Modulator Valve 8 6 SA Right PMV HLD Solenoid Open Circuit 42 APPENDIX J1939 SPN and FMI Codes and their Bendix Blink Code Equivalents Bendix Blink Code Equivalent s
30. Tool Plug Lock Controller Harness mA 17 Way AMP 927768 9 N A 1 2 5 mm Controller Harness lt Pon 18 Way AMP Is Bg N A N A MCP 2 8 X2 e 8 968974 1 968874 2 5 4 mm Controller Harness P 15 Way AMP N A N A MCP 2 8 X3 ST 8 968973 1 539723 2 968873 1 0 2 5 mm ABS Modulator Harness AMP Twist Lock WA NA Bayonet 1 967325 2 ATC Modulator Ser a Harness 929975 1 AMP Twist Lock NIA Bayonet 1 967325 3 539635 1 ABS Modulator Harness 3 pin Packard Metri Pack 280 Series 12040977 42077411 12015323 12034145 12155975 WS 24 Wheel Speed Sensor Connectors AO V Deutsch DTMO06 Deutsch DT04 series Standard round two pin CHART 5 BENDIX EC 80 CONTROLLER COMPONENT CONNECTORS 33 Troubleshooting Wiring CONTINUED Speed Sensor Mounting Block 100 Tooth typical Speed Sensor Exciter Ring WS 24 Speed Sensor 90 Deg Brake Drum Max Gap Mounting Block Sensor to Exciter 015 Inches 100 Tooth Exciter Ring 90 Speed Sensors Sensor Clamping Straight Speed Sleeve Sensors FIGURE 12 BENDIX WS 24 WHEEL SPEED SENSOR INSTALLATION Wheel Speed Sensor Wiring Route sensor wiring coming out of the wheel ends away from moving brake components Sensor wiring needs to be secured to the axle to prevent excess cable length and wiring damage It is required that cable ties be installed to the sensor wire w
31. U DTC F14 Configuration mismatch ECU DTC C6 ECU DTC CF ECU DTC CO ECU DTC C8C ECU DTC CC ECU DTC 63 ECU DTC 6E ECU DTC 6C ECU DTC 63C Valve Configuration Mismatch ECU Repair Information Check for damaged or corroded connectors Check for damaged wiring Clear trouble codes If Diagnostic Trouble Codes return contact the Bendix Tech Team at 1 800 AIR BRAKE 1 800 247 2725 option 2 then 1 for further troubleshooting assistance Verify components installed match ECU configuration Check for damaged or corroded connectors Check for damaged wiring Clear trouble codes If Diagnostic Trouble Codes return contact the Bendix Tech Team at 1 800 AIR BRAKE 1 800 247 2725 option 2 then 1 for further troubleshooting assistance Verify components installed match ECU configuration Check for damaged or corroded connectors Check for damaged wiring Clear trouble codes If Diagnostic Trouble Codes return contact the Bendix Tech Team at 1 800 AIR BRAKE 1 800 247 2725 option 2 then 1 for further troubleshooting assistance Verify number of modulators wired matches components installed match ECU configuration Troubleshooting Diagnostic Trouble Codes Miscellaneous 1st Blink Code 12 Location Miscellaneous Diagnostic Trouble Code Description Stop Lamp Switch Not Detected Stop Lamp Switch Defective ATC Disabled or Dynamometer Test Mode Active Retar
32. ain active even if power to the ECU is removed and re applied Press and release the blink code switch three 3 times or use a hand held or PC based diagnostic tool to exit the test mode AUTOMATIC TIRE SIZE CALIBRATION The ECU requires a precise rolling circumference ratio between steer axle and drive axle tires in order for ABS andATC to perform in an optimal manner For this reason a learning process continuously takes place in which the precise ratio is calculated This calculated value is stored in the ECU memory provided the following conditions are met 1 Rolling circumference ratio is within the permissible range 2 Vehicle speed is greater than approximately 15 MPH 3 No acceleration or deceleration is taking place 4 There are no active speed sensor Diagnostic Trouble Codes DTCs The ECU is provided with a ratio value of 1 00 as a default setting If the automatic tire size alignment calculates a different value this is used to overwrite the original figure in the memory This process adapts the ABS and ATC function to the vehicle Acceptable Tire Sizes The speed calculation for an exciter ring with 100 teeth is based on a default tire size of 510 revolutions per mile This figure is based on the actual rolling circumference of the tires and varies with tire size tire wear tire pressure vehicle loading etc The ABS response sensitivity is reduced when the actual rolling circumference is excessive on all w
33. al Axle X3 15 Way if Bendix 14 Left Additional Axle ge ge 12 Right Additional Axle is configured for 6 sensors 15 Right Additional Axle 20 1st Blink Code Troubleshooting Diagnostic Trouble Codes Pressure Modulator Valves Location Left Steer Axle Right Steer Axle Left Drive Axle Right Drive Axle Left Additional Axle Right Additional Axle Diagnostic Trouble Code Description Release Solenoid Shorted to Ground Release Solenoid Shorted to Voltage Release Solenoid Open Circuit Hold Solenoid Shorted to Ground Hold Solenoid Shorted to Voltage Hold Solenoid Open Circuit CMN Open Circuit Configuration Error Repair Information Verify no continuity between PMV leads and ground Verify 4 9 to 5 5 ohms from REL to CMN amp HLD to CMN and 9 8 to 11 ohms from REL to HLD Check for corroded damaged wiring or connectors between ECU and PMV Verify no continuity between PMV leads and voltage Verify 4 9 to 5 5 ohms from REL to CMN amp HLD to CMN and 9 8 to 11 ohms from REL to HLD Check for corroded damaged wiring or connectors between ECU and PMV Verify 4 9 to 5 5 ohms from REL to CMN amp HLD to CMN and 9 8 to 11 ohms from REL to HLD Check for corroded damaged wiring or connectors between ECU and PMV Verify no continuity between PMV leads and ground Verify 4 9 to 5 5 ohms from REL to CMN amp HLD to CMN and 9 8 to 1
34. anging mode must not be longer than 2 seconds 4 After a pause of 3 5 seconds the ECU will begin responding with output information blinks See Figure 10 for an example 3 5 second Time in Seconds 2 5 second pause between messages initial pause ba Wi 2 1 Switch D Activation TIL SUL 2 2 Jf end of messages 1 5 second pause between digits Lamp stays illuminated for 5 seconds showing FIGURE 8 EXAMPLE OF BLINK CODE MESSAGE 13 Blink Code Timing The ECU responds with a sequence of blink codes The overall blink code response from the ECU is called a message Each message includes depending on the mode selected by the technician a sequence of one or more groups of blinks Simply record the number of blinks for each sequence and then use the troubleshooting index on page 18 for active or inactive trouble codes Once you have located the code you will be directed to the page that provides the applicable troubleshooting information NOTE 1 Blink sequences illuminate the ABS indicator lamp for half a second with half second pauses between them 2 Pauses between blink code digits are 1 5 seconds 3 Pauses between blink code messages are 2 5 seconds 4 The lamp remains on for five 5 seconds at the end of messages See Figure 8 for an example showing the message 2 1 followed by 2 2 Once the ABS indicator lamp begins displaying a sequence of codes it continue
35. between the battery and HSA lamp output of the ECU Check the wiring between the ECU and HSA lamp Check the HSA lamp and condition of its wiring Verify resistance across the HSA solenoid Check the ECU and HSA solenoid for corroded or damaged wiring and or connectors Miscellaneous Troubleshooting For all tests below take all measurements at ECU harness connector pins in order to check wire harness and sensor Probe the connector carefully so that the terminals are not damaged Stop Lamp Switch Test 1 With the service brake applied measure the system voltage 9 to 17 VDC stop lamp switch input to ECU Test Measurement Stop Lamp Switch to Ground 9 to 17 VDC 2 Apply and release service brake does lamp extinguish 3 Verify brake lamp switch is connected to ECU via hard wire or J1939 4 With service brake released check for presence of stop lamp bulb Dynamometer Test Mode ATC Indicator Lamp Continuously Illuminated 1 Clear the Dynamometer Test Mode by depressing and releasing the blink code switch three times or use an off board diagnostic tool ABS Indicator Lamp 1 Verify diagnostic blink code switch is open when not activated Cab mount ECU Looking into wire harness connector Connector Pin PMV Location 4 TCV Common X1 9 Stop Lamp Switch 18 Way 12 ABS WL Ground 15 ABS WL Interlock 17 Retarder 18 ABS WL 3 PMV Left Steer Axle Common X2 6 PMV Right Steer Axle Common 18 Way
36. clamping sleeve Verify sensor lead routing and clamping Check for corroded damaged wiring or connectors between the ECU and the wheel speed sensor Verify correct tire size as desired Verify proper tire inflation Verify correct number of exciter ring teeth ECU is configured for four sensors but has detected the presence of additional sensors Verify sensor wiring and ECU configuration 19 Speed Sensor Repair Tests 1 Take all measurements at ECU harness connector pins in order to check wire harness and sensor Probe the connector carefully so that the terminals are not damaged 2 Wheel speed sensor measurements should read Measurement 1500 2500 Ohms Open Circuit no continuity Location Sensor Sensor to voltage or ground Sensor output voltage gt 0 25 of VAC sensor output at 0 5 revs sec 3 Clear DTC after issue is corrected The dynamic sensor DTC will remain until the power is cycled to the ABS ECU and vehicle is driven above 15 MPH or DTC was cleared using either the diagnostic blink code switch or diagnostic tool Cab mount ECU Looking into Connector Pin Wheel Speed Sensor Location wire harness connector X1 10 Right Drive Axle 18 Way 11 Right Drive Axle 5 Left Steer Axle 8 Left Steer Axle X2 11 Right Steer Axle 18 Way 14 Right Steer Axle 15 Left Drive Axle 18 Left Drive Axle 11 Left Addition
37. ct vehicle stability To avoid this the Bendix EC 80 controller switches off the retarder as soon as a lock up is detected at one or more of the drive axle wheels When the ECU is placed in the ABS off road mode it will switch off the retarder only when ABS is active on a steer axle wheel and a drive axle wheel Optional HSA Mode As a driver begins to move a vehicle forward when stopped facing up an incline or backs up a vehicle when facing down a slope vehicles without Bendix Hill Start Aid Assist HSA may experience rolling downhill during the delay between the release of the brakes and providing enough torque to move the vehicle up the slope For vehicles with Bendix HSA the ECU receives a J1939 message from the transmission when it will need the assistance of the brakes to avoid the vehicle rolling The HSAcomponents apply brake pressure to select wheel end brakes After three 3 seconds from the driver brake release the HSA system releases the brake pressure The three second delay allows the drive line components to activate while the vehicle is held in place A WARNING When using the HSA function the ABS off road function and the Retarder Relay output are temporarily disabled Optional ABS Off Road Mode On some road conditions particularly when the driving surface is soft the stopping distance with ABS may be longer than without ABS This can occur when a locked wheel on soft ground plows up the
38. d Ensure that battery voltage is correct for the ECU Too High Check vehicle battery and associated components Check for damaged wiring Check for damaged or corroded connectors and connections Power Supply Tests 1 2 24 Take all measurements at ECU harness connector 3 Check for damaged wiring damaged or corroded Place a load e g an 1157 stop lamp across battery connectors and connections or ignition and ground connection measure ignition 4 Check condition of vehicle battery and associated and battery voltage with the load Ignition to Ground components ground connection good and tight should measure between 9 to 17 VDC Battery to 5 Check alternator output for excessive noise Ground should also measure between 9 to 17 VDC Cab mount ECU Looking into wire harness connector Connector Pin Power Supply Test X1 1 Ground 18 Way 3 Ignition 16 Battery 1st Blink Code 11 Troubleshooting Diagnostic Trouble Codes J1939 Serial Communications Location J1939 Diagnostic Trouble Code Description J1939 Serial Link Loss of Communications J1939 Electronic Retarder Timeout or Invalid Signal ERC1 J1939 Electronic Engine Controller 1 Timeout or Invalid Signal EEC1 J1939 Electronic Engine Controller 2 Timeout or Invalid Message EEC2 J1939 Transmission Loss of Communications ETC1 Message J1939 Engine Loss of Communications EEC3 Message J1939 Engine Loss of
39. der Relay Open Circuit or Shorted to Ground Retarder Relay Circuit Shorted to Voltage ABS Indicator Lamp Circuit Fault Common Shorted to Ground Common Shorted to Voltage ATC Disabled to Prevent Brake Fade Wheel Speed Sensors Reversed on an Axle Diff Lock Solenoid Shorted to Ground or Open Circuit Repair Information ECU has not detected the presence of the stop lamp switch since ignition power was applied note that stop lamp switch input may be applied to the Bendix EC 80 controller using either hardwire input or J1939 Apply and release service brake Check for brake switch input into ECU see system wiring schematic With service brake released check for presence of the stop lamp bulb With service brake applied verify system voltage is now present at the stop lamp switch input to the ECU Check for damaged wiring between ECU stop lamp switch and bulb Check for corroded or damaged connectors Check for damaged or reversed J1939 wiring Check for corroded or damaged connectors on J1939 link Verify presence of engine ECU on the J1939 link Verify ECU configuration Apply and release service brake Check for brake switch input into ECU see system wiring schematic With service brake released check for presence of the stop lamp bulb With service brake applied verify system voltage is now present at the stop lamp switch input to the ECU Check for damaged wiring between ECU stop lamp switch and bulb Check
40. des when the diagnostic blink code switch is depressed and released two times See page 18 for the index showing trouble codes Go to the specific troubleshooting guide page shown there for further help Inactive trouble codes and event history may be retrieved and cleared by using a hand held or PC based diagnostic tool such as the Bendix ACom Diagnostics software Clearing Active Diagnostic Trouble Codes The ECU will clear active trouble codes when the diagnostic blink code switch is depressed and released three 3 times System Configuration Check Mode The ABS indicator lamp will display system configuration information when the diagnostic blink code switch is depressed and released four 4 times The lamp will blink out configuration information codes using the following patterns See Chart 4 1st Number System Power 1 12 Volts 2 24 Volts 2nd Number Wheel Speed Sensors 4 4 Sensors 6 6 Sensors 3rd Number Pressure Modulator Valves 4 4 Modulators 5 5 Modulators 6 6 Modulators 4th Number ABS Configuration 1 4S 4M or 6S 6M 2 6S 4M 3 6S 5M 5th Number Traction Control Configuration 2 No ATC 3 ATC Engine Control Only 4 ATC Brake Control Only 5 Full ATC Engine Control amp Brake Control 6th Number Retarder Configuration 1 No Retarder 2 J1939 Retarder 3 Retarder Relay 4 J1939 Retarder Retarder Relay CHART
41. dix TechTeam Dash Lamps Ignition on start up trailer with PLC onds ON for 3 sec ON for 2 5 seconds Trailer ABS Lamp Comments f any of the described lamp behaviors do not occur or if the lamp remains on during operation have the vehicle serviced by a qualified mechanic as soon as possible to restore full system functionality ON for 3 seconds ON for 3 seconds 3 seconds after ignition with no Diagnostic Trouble Codes At Vehicle Startup Normal Lamp OFF During an ATC Lamp flashes slowly every 2 5 seconds Lamp OFF Lamp OFF 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 Lamp OFF Lamp OFF e Uses dash switch e Not for firm road surfaces Event Flashes quickly e Allows more wheel lock up less ABS intervention e Mode only applies under 25 mph Over 25 mph the system reverts to full ABS including ATC and ATC lamp goes off Special Mode Operation Normal OR depending on vehicle options a vehicle can have either ABS off road or HSA Vehicles with Hill Start Feature During HSA Mode Flashes slowly every 2 5 seconds During an ATC Event During an Automa
42. e Towing vehicles manufactured after March 1 2001 must support the trailer ABS indicator lamp located on the dash For further information contact either the vehicle manufacturer Bendix or your local authorized Bendix dealer 1 Position and secure the Bendix EC 80 controller in the original mounting orientation using the mounting bolts retained during removal When mounting the unit in the cab use no more torque than is necessary to firmly secure the ECU into position Over tightening the mounting hardware can cause damage to the Bendix EC 80 controller 2 Reconnect the electrical connectors to the ECU 3 Apply power and monitor the Bendix EC 80 controller power up sequence to verify proper system operation See Troubleshooting Wiring section beginning on page 32 for more information on wiring harnesses Troubleshooting Blink Codes and Diagnostic Modes ECU DIAGNOSTICS The Bendix EC 80 controller contains self testing diagnostic circuitry that continuously checks for the normal operation of internal components and circuitry as well as external ABS components and wiring Active Diagnostic Trouble Codes When an erroneous system condition is detected the Bendix EC 80 controller 1 Illuminates the appropriate indicator lamp s and disengages part or all of the ABS and ATC functions See pages 8 9 2 Places the appropriate trouble code information in the ECU memory 3 Communicates the appropriate tro
43. e and the green LED will flash four 4 times to indicate communications have been established 16 If the ABS ECU has no active DTCs only the green LED will remain illuminated If the ABS ECU has at least one active DTC the RDU tool displays the first DTC by illuminating the red LEDs indicating the malfunctioning ABS component and its location on the vehicle See Figure 10 If there are multiple DTCs on the ABS system the RDU tool will display one DTC first then once that DTC has been repaired and cleared the next code will be displayed Typical Combination DTCs are e Right steer sensor e Right drive modulator e Left steer sensor e Left drive modulator e Right drive sensor e Right additional e Left drive sensor modulator e Right additional sensor Left additional modulator Left additional sensor e Traction modulator e ECU e Engine serial communication e MOD red LED illuminated shows the Common connection of one or more modulators is shorted to battery or ground e VLT Flashing indicates either over or under voltage condition To pinpoint the root cause and to ensure that the system DTC has been properly corrected additional troubleshooting may be necessary Bendix RDU Reset Function The magnetic reset switch is located in the center top of the RDU tool Activation requires a magnet with 30 gauss minimum Right steer modulator Left steer modulator The reset operations are 1
44. e g when the vehicle is started and turns off after the self test is completed providing no Diagnostic Trouble Codes DTCs are present on the tractor 2 If the ECU is unplugged or has no power 3 When the ECU is placed into the ABS off road mode the lamp flashes rapidly 4 To display blink codes for diagnostic purposes after the external diagnostic switch is activated Certain Bendix EC 80 controllers communicate with other vehicle control modules to operate the ABS indicator lamp using To confirm if a specific ECU uses serial communications see the Controller Specifications box on page 4 Indicator Lamp Control Using Serial Communications Links As mentioned above depending on the vehicle manufacturer the dash indicator lamps ABS ATC and trailer ABS may be controlled using serial communications link In these cases the Bendix EC 80 controller will send a serial communications message over the J1939 links indicating the required status of the lamp s Another vehicle control module receives the message and controls the indicator lamp s Retarder Relay Disable Output The retarder relay disable output may be used to control a retarder disable relay When configured to use this output the ECU will energize the retarder disable relay and inhibit the use of the retarder as needed SAE J1939 Serial Communications A Controller Area Network CAN data link SAE J1939 is provided for communication This link
45. e of 2 5 second 4 When the ECU is placed in the ATC off road mode the lamp will flash steadily every 2 5 seconds This notifies the vehicle operator that the off road mode is active Interaxle Differential Lock Control AWD Transfer Case A Bendix EC 80 ATC ECU can control the interaxle differential lock AWD transfer case This is recommended on AWD vehicles but the ECU must be specially configured to provide this feature For help with configuring an ECU use the information in the Controller Specifications box on page 4 to contact Bendix POWER UP SEQUENCE A WARNING The vehicle operator should verify proper operation of all installed indicator lamps ABS ATC and trailer ABS when applying ignition power and during vehicle operation See Chart 2 on page 5 Lamps that do not illuminate as expected when ignition power is applied or remain illuminated indicate the need for maintenance ABS Indicator Lamp Operation The ECU will illuminate the ABS indicator lamp for approximately three seconds when ignition power is applied after which the lamp will extinguish if no Diagnostic Trouble Codes are detected The ECU will illuminate the ABS indicator lamp whenever full ABS operation is not available due to a Diagnostic Trouble Code In most cases partial ABS is still available ATC Status Indicator Lamp Operation The ECU will illuminate the ATC lamp for approximately 2 5 seconds when ignition power is applied afte
46. eck the J1939 serial link and communicate with other vehicle modules In particular if the serial link shows that the vehicle has a retarder device present the ECU will configure itself to communicate with the retarder device for improved ABS performance For example if the ECU detects the presence of a retarder disable relay during a reconfiguration it will configure itself to control the relay to disable the retarding device as needed Reconfiguring Bendix EC 80 ATC ECUs As with non ATC ECUs the Bendix EC 80 ATC ECU also carries out independently from any reconfiguration being carried out by the technician an automatic check of the J1939 serial link and communicates with other vehicle modules This includes checking for ATC and retarder disable relay operation In addition Bendix EC 80 ATC controllers will determine the number of wheel speed sensors and PMVs installed and configure itself accordingly 6S 5M Configuration Bendix EC 80 ATC controllers will configure for 6S 5M operation when a reconfiguration event is initiated and the ECU detects that an additional axle PMV is wired as follows PMV Connector ECU Connector Hold Right Additional Axle Hold Release Left Additional Axle Release Common Right Additional Axle Common See 6S 5M System Schematic page 37 for details Reconfiguration Using the Blink Code Switch The reconfiguration procedure is the same for ATC and non ATC ECUs With ignition power removed from t
47. ess always use the maximum size wire supported by the wire harness connectors for battery ignition ground PMV TCV Interaxle Differential Lock and indicator lamp circuits All sensor and serial communications circuits J1939 must use twisted pair wiring one to two twists per inch See the appropriate SAE document for additional details 32 A WARNING All wires must be carefully routed to avoid contact with rotating elements Wiring must be properly secured approximately every 6 to 12 inches using UV stabilized non metallic hose clamps or bow tie cable ties to prevent pinching binding or fraying It is recommended that wires be routed straight out of a connector for a minimum of three inches before the wire is allowed to bend Battery and ground wires should be kept to a minimum length If convoluted tubing is used its I D must match the size of the wire bundle as closely as possible A CAUTION Wire harness lengths must be carefully selected for the vehicle Harnesses that are too long increase the possibility of electrical interference and wire damage Excess lengths of wire are not to be wound to form coils instead re route repair or replace wire harness Do not attempt to stretch harnesses that are too short since mechanical strain can result in wire breakage ABS Component Connector Wire Terminal tulle ceal Terminal Terminal Crimp
48. first before the PMV Cab mount ECU Looking into wire harness connector Connector Pin PMV Location 1 Left Steer Axle Hold 2 Left Steer Axle Release 2 Left Steer Axle Common 4 Right Steer Axle Hold 6 Right Steer Axle Common X2 7 Right Steer Axle Release 18 Way 9 Right Drive Axle Common 10 Right Drive Axle Hold 13 Right Drive Axle Release 12 Left Drive Axle Common 16 Left Drive Axle Hold 17 Left Drive Axle Release 4 Left Additional Axle Hold s 6 Left Additional Axle Common Ge Geen 7 Left Additional Axle Release is configured for 6 H Right Additional Axle Common sensors 10 Right Additional Axle Hold 13 Right Additional Axle Release Troubleshooting Diagnostic Trouble Codes Traction Control Valves 1st Blink Location Code 18 Traction Control Valve 2nd Diagnostic Blink Trouble Code Code Description Repair Information TCV Solenoid Verify 7 to 19 ohms between TCV and TCV common Verify no continuity between Shorted to TCV leads and ground Check for corroded damaged wiring or connectors between Ground ECU and TCV TCV Solenoid Verify 7 to 19 ohms between TCV and TCV common Verify no continuity between Shorted to TCV leads and voltage Check for corroded damaged wiring or connectors between Voltage ECU and TCV TCV Solenoid Verify 7 to 19 ohms between TCV and TCV common Check for
49. for corroded or damaged connectors Check for damaged or reversed J1939 wiring Check for corroded or damaged connectors on J1939 link Verify presence of engine ECU on the J1939 link Verify ECU configuration ECU has been placed in the Dynamometer Test Mode by either the diagnostic blink code switch or a hand held or PC based diagnostic tool ATC is disabled Verify vehicle contains a retarder relay Verify ECU configuration Check wiring between ECU and retarder relay Verify no continuity between retarder disable output of Bendix EC 80 controller and ground Verify condition and wiring of the retarder relay Check wiring between ECU and retarder relay Verify no continuity between retarder disable output of Bendix EC 80 controller and voltage Verify condition and wiring of the retarder relay Check operation of diagnostic blink code switch Check wiring of diagnostic blink code switch and ABS WL Verify ABS WL ground input Verify no continuity between the CMN of all PMVs HSA TCV and Diff Lock Solenoid Bendix EC 80 ATC options and ground Check for corroded damaged wiring or connectors between the ECU and CMN of all PMVs HSA TCV and Diff Lock Solenoid Bendix EC 80 ATC options Verify no continuity between the CMN of all PMVs HSA TCV and Diff Lock Solenoid Bendix EC 80 ATC options and voltage Check for corroded damaged wiring or connectors between the ECU and CMN of all PMVs HSA TCV and Diff Lock Solenoid
50. he Bendix EC 80 controller depress the blink code switch After the ignition power is activated depress and release the switch seven times to initiate a reconfiguration Diagnostic Tool Areconfiguration event may be initiated using a hand held or PC based diagnostic tool to communicate with the ECU over the SAE J1939 diagnostic link 11 Troubleshooting General Read and follow the General Safety Guidelines on page two 2 of this document REMOVING THE BENDIX EC 80 CONTROLLER ASSEMBLY 1 Turn vehicle ignition off 2 Remove as much contamination as possible prior to disconnecting air lines and electrical connections 3 Note the ECU assembly mounting position on the vehicle 4 Disconnect the electrical connectors from the ECU 5 Remove and retain the mounting bolts that secure the ECU 12 INSTALLING A NEW BENDIX EC 80 CONTROLLER A CAUTION When replacing the Bendix EC 80 controller verify that the unit you are installing has the correct default settings Failure to do so could result in a loss of features such as ATC and PLC or noncompliance with U S regulations such as FMVSS 121 It is recommended to use only the correct replacement part number However most configuration settings can be altered using the Bendix ACom ABS Diagnostic Software program Verify correct operation of the Bendix EC 80 controller system and indicator lamps prior to putting the vehicle back into servic
51. he controller provides PLC An oscilloscope can be used to measure or identify the presence of a PLC signal on the power line The PLC signal is an amplitude and frequency modulated signal Depending on the filtering and load on the power line the PLC signal amplitude can range from 5 0 mVp p to 7 0 Vp p Suggested oscilloscope settings are AC coupling 1 volt div 100 usec div The signal should be measured at the ignition power input of the Bendix EC 80 controller Note An ABS trailer equipped with PLC or a PLC diagnostic tool must be connected to the vehicle in order to generate a PLC signal on the power line To confirm if a specific ECU uses PLC or not see the Controller Specifications box below BENDIX EC 80 CONTROLLER INPUTS Battery and Ignition Inputs The ECU operates at a nominal supply voltage of 12 or 24 volts depending on the ECU The battery input is connected through a 30 amp fuse directly to the battery The ignition input is applied by the ignition switch through a 5 amp fuse Ground Input The Bendix EC 80 controller supports one ground input See pages 35 37 for electrical system schematics ABS Indicator Lamp Ground Input Bendix EC 80 ECUs require a second ground input X1 12 for the ABS indicator lamp The X1 wire harness connector contains an ABS indicator lamp interlock X1 15 which shorts the ABS indicator lamp circuit X1 18 to ground if the connector is removed from the ECU Bendix WS 24
52. heels For a 100 tooth exciter ring the minimum number of tire revolutions per mile is 426 and the maximum is 567 The ECU will set DTCs if the number of revolutions are out of this range 10 ABS PARTIAL SHUTDOWN Depending which component the trouble code is detected on the ABS and ATC functions may be fully or partially disabled Even with the ABS indicator lamp on the Bendix EC 80 controller may still provide ABS function on wheels that are not affected The ECU should be serviced as soon as possible Steer Axle ABS Modulator Diagnostic Trouble Code ABS on the affected wheel is disabled ABS and ATC on all other wheels remains active Drive Axle Additional Axle ABS Modulator Diagnostic Trouble Code ATC is disabled ABS on the affected wheel is disabled ABS on all other wheels remains active Steer Axle Wheel Speed Sensor Diagnostic Trouble Code The wheel with the Diagnostic Trouble Code is still controlled by using input from the remaining wheel speed sensor on the front axle ABS remains active on the rear wheels ATC is disabled Drive Axle Additional Axle Wheel Speed Sensor Diagnostic Trouble Code ATC is disabled In a four sensor system ABS on the affected wheel is disabled but ABS on all other wheels remains active In a six sensor system ABS remains active by using input from the remaining rear wheel speed sensor on the same side ATC Modulator Diagnostic Trouble Code ATC is disabled ABS remai
53. ical support call the Bendix technical assistance team at 1 800 AIR BRAKE 1 800 247 2725 option 2 1 Monday through Friday 8 00 A M to 6 00 P M ET and follow the instructions in the recorded message Or you may send an e mail to techteam bendix com to reach the Bendix technical assistance team 17 18 Active or Inactive Diagnostic Trouble Code INDEX How to interpret the first digit of messages received when active or inactive Diagnostic Trouble Code DTC Mode is entered ist Blink Code Go Here for Troubleshooting Tests Number eebe date eats aces No DTCs 1 1 Zoras Wheel Speed Sensors page 19 20 E Wheel Speed Sensors page 19 20 A onsen Wheel Speed Sensors page 19 20 EE Wheel Speed Sensors page 19 20 LE Power Supply page 24 kau Pressure Modulator Valves page 21 22 Bix Pressure Modulator Valves page 21 22 CAET Pressure Modulator Valves page 21 22 10 Pressure Modulator Valves page 21 22 Te J1939 Serial Communications page 25 KEE Miscellaneous page 27 29 WS Su ECU page 26 14 Wheel Speed Sensors page 19 20 E GE Wheel Speed Sensors page 19 20 16 Pressure Modulator Valves page 21 22 17 Pressure Modulator Valves page 21 22 BEE Traction Control Valves page 23 Example For a message sequence of 3 2 12 4 For the first sequence go to page 19 and for the second sequence go to page 27 See Page 40 for Appendix J1939 SPN and FMI Codes and their Bendix
54. icator lamp turns off 4 When the ECU is placed in the ATC off road mode the lamp will flash steadily every 2 5 seconds This notifies the vehicle operator that the off road mode is active Differential Braking Differential braking is automatically activated when drive wheel s on one side of the vehicle are spinning This typically occurs on asphalt road surfaces with patches of ice The traction system will then lightly apply the brake to the drive wheel s that are spinning The vehicle differential will then drive the wheels on the other side of the vehicle Differential braking is available at vehicle speeds up to 25 MPH Disabling ATC Differential Braking ATC differential braking is disabled under the following conditions 1 During power up e g when the vehicle is started until the ECU detects a service brake application 2 If the ECU receives a J1939 message indicating that the vehicle is parked 3 When the Dynamometer Test Mode is active The Dynamometer Test Mode is entered using the diagnostic blink code switch or by using a diagnostic tool such as Bendix ACom Diagnostics 4 In response to a serial communications request from a diagnostic tool 5 During brake torque limiting to avoid overheating of the brakes 6 When certain Diagnostic Trouble Code conditions are detected Engine Torque Limiting ETL with Smart ATC Traction Control The Bendix EC 80 controller uses Engine Torque L
55. imiting to control drive axle wheel slip This is communicated to the engine control module using J1939 and is available at all vehicle speeds Bendix Smart ATC Traction Control The Bendix EC 80 ATC controller has an additional feature known as Smart ATC traction control Smart ATC traction control monitors the accelerator pedal position using J1939 to help provide optimum traction and vehicle stability By knowing the driver s intention and adapting the target slip of the drive wheels to the driving situation the Smart ATC traction control allows higher wheel slip when the accelerator pedal is applied above a preset level The target wheel slip is decreased when driving through a curve for improved stability Disabling ATC Engine Control and Smart ATC Traction Control ATC Engine Control and Smart ATC traction control will be disabled under the following conditions 1 In response to a serial communications request from an off board tool 2 At power up until the ECU detects a service brake application 3 If the ECU receives a J1939 message indicating that the vehicle is parked 4 Ifthe Dynamometer Test Mode is active This may be accomplished via an off board tool or the diagnostic blink code switch 5 When certain Diagnostic Trouble Code conditions are detected Optional ATC Off Road Mode In some road conditions the vehicle operator may desire additional drive wheel slip when ATC is active
56. ip Regulation Another name for traction control ATC Automatic Traction Control An additional ABS function in which engine torque is controlled and brakes are applied differentially to enhance vehicle traction ATC ESP Lamp Alamp that indicates when stability functions including traction control roll stability program or yaw control are operating Channel A controlled wheel site CAN Controller Area Network J1939 is an SAE version of the CAN link Clear Codes System to erase historical diagnostic trouble codes from the ECU from either the Diagnostic Switch or from a hand held diagnostic tool only repaired diagnostic trouble codes may be cleared Configuration The primary objective is to identify a normal set of sensors and modulators for the Electronic Control Unit so that it will identify future missing sensors and modulators Diagnostic Connector Diagnostic receptacle in vehicle cab for connection of J1587 hand held or PC based test equipment The tester can initiate test sequences and can also read system parameters Diagnostic Switch A switch used to activate blinks codes Differential Braking Application of brake force to a spinning wheel so that torque can be applied to wheels which are not slipping ECU Electronic Control Unit ESP Electronic Stability Program Full stability function that includes RSP amp YC subfunctions Diagnostic Trouble Code A condi
57. is used for various functions such as e To disable retarding devices during ABS operation e To request that the torque converter disable lock up during ABS operation e To share information such as wheel speed and ECU status with other vehicle control modules Bendix EC 80 ATC controllers utilize the J1939 data link for ATC and drag torque control functions Trailer ABS Indicator Lamp Control Certain models of the Bendix EC 80 controller activate a trailer ABS indicator lamp located on the dash panel that indicates the status of the trailer ABS unit on one or more trailers or dollies Typically the Bendix EC 80 controller directly controls the trailer ABS indicator lamp based on the information it receives from the trailer ABS Alternatively some vehicles require the Bendix EC 80 controller to activate the trailer ABS indicator lamp by communicating with other vehicle controllers using serial communications To confirm if a specific ECU uses serial communications see the Controller Specifications box on page 4 ATC Lamp Output ATC Off Road Switch Input The ATC dash lamp is controlled by the Bendix EC 80 ATC ECU The ATC lamp illuminates 1 During power up e g when the vehicle is started for approximately 2 5 seconds and turns off after the self test is completed providing no Diagnostic Trouble Codes are present 2 When ATC is disabled for any reason 3 During an ATC event the lamp will flash rapidly at a rat
58. ithin 3 inches 76 2 mm of the sensor head to provide strain relief Following the axle the sensor wires must be attached along the length of the service brake hoses using cable ties with ultraviolet protection and secured every 6 to 8 inches 152 to 203 mm Sufficient but not excessive cable length must be provided to permit full suspension travel and steering axle movement Install wires so that they cannot touch rotating elements such as wheels brake discs or drive shafts Radiation protection may be necessary in the area of brake discs 34 Bendix does not recommend using standard tie wraps to secure wiring harnesses directly to rubber air lines This may cause premature wiring failure from the pressure exerted on the wiring when air pressure is applied through the air line Non metallic hose clamps or bow tie tie wraps are preferred The use of grommets or other suitable protection is required whenever the cable must pass through metallic frame members All sensor wiring must utilize twisted pair wire with approx imately one to two twists per inch It is recommended that wires be routed straight out of a connector for a minimum of three inches before the wire is allowed to bend Troubleshooting Bendix EC 80 ABS Wiring Schematic 4S 4M DRIVE AXLE STEER AXLE a amp 9 Oa oza z z o aa aa x T izp 23838 980 933 98q
59. ls do not support PLC See Chart 1 for more details BENDIX EC 80 CONTROLLERS WITH PLC Since March 1 2001 all towing vehicles must have an in cab trailer ABS indicator lamp Trailers transmit the status of the trailer ABS over the power line the blue wire of the J560 connector to the tractor using a PLC signal See Figures 4 and 5 lt 12 VDC lt 10 VDC H lt 8 VDC lt 6VDC lt 4VDC lt 2VDC lt DVD FIGURE 4 POWER LINE WITHOUT PLC SIGNAL lt 10 VDC H lt 8 VDC lt 6VDC lt 4VDC lt 2VDC lt 0VDC FIGURE 5 POWER LINE WITH PLC SIGNAL Typically the signal is broadcast by the trailer ABS ECU details The application of PLC technology for the heavy vehicle industry is known as PLC4Trucks The Bendix EC 80 Serial ECU Mounting ee Sensors PMVs ATC Blink 27 PLC oft ofr deed J1939 br ngen 2 a laj vlvl Iv e c 4 4i wiviyi fv ot eae 12 Ap 456 kW Iw wi vw W Y BA E 24 Ap 456 Y Iw I Iw 1 w Y CHART 1 BENDIX EC 80 CONTROLLERS AVAILABLE 3 PLC controller and the Bendix EC 80 ATC controller 12 volt versions support PLC communications in accordance with SAE J2497 Identifying a Bendix EC 80 Controller with PLC Refer to the information panel on the ECU label to see if t
60. minimum of 0 25 VAC sensor output at 0 5 RPS Verify condition of sensor head Verify mounting of exciter ring and condition of teeth Verify proper bearing end play Verify condition and retention of clamping sleeve Verify sensor lead routing and clamping Verify 1500 2500 ohms across sensor leads Verify no continuity between sensor leads and ground or voltage Verify no continuity between sensor leads and other sensors Check for corroded damaged wiring or connectors between the ECU and the wheel speed sensor Adjust sensor to contact exciter ring Rotate wheel and verify a minimum of 0 25 VAC sensor output at 0 5 RPS Verify condition of sensor head Verify mounting of exciter ring and condition of teeth Verify proper bearing end play Verify condition and retention of clamping sleeve Verify sensor lead routing and clamping Check for corroded damaged wiring or connectors between the ECU and the wheel speed sensor Verify mounting of exciter ring and condition of teeth Verify proper bearing end play Verify condition and retention of clamping sleeve Verify sensor lead routing and clamping Check mechanical function of brake Check for kinked or restricted air lines Adjust sensor to contact exciter ring Rotate wheel and verify a minimum of 0 25 VAC sensor output at 0 5 RPS Verify condition of sensor head Verify mounting of exciter ring and condition of teeth Verify proper bearing end play Verify condition and retention of
61. ns active J1939 Communication Diagnostic Trouble Code ATC is disabled ABS remains active ECU Diagnostic Trouble Code ABS and ATC are disabled The system reverts to normal braking Voltage Diagnostic Trouble Code While voltage is out of range ABS and ATC are disabled The system reverts to normal braking When the correct voltage level is restored full ABS and ATC function is available Operating voltage range is 9 0 to 17 0 VDC Reconfiguring Bendix EC 80 Controllers SYSTEM RECONFIGURATION The Bendix EC 80 controller is designed to allow the technician to change the default system settings chosen by the vehicle OEM to provide additional or customized features When replacing an ECU be sure to use an equivalent Bendix replacement part number so that the standard default settings are provided Depending on the version the customizable features include ABS control settings engine module communication etc Many of these settings can be reconfigured using a hand held diagnostic tool or PC based software such as the Bendix ACom Diagnostics program ECU RECONFIGURATION Reconfiguring Bendix EC 80 ABS ECUs Reconfiguring a Bendix EC 80 ABS controller may be carried out by using the Blink Code Switch or by using a hand held or PC based diagnostic tool Note During the reconfiguration process and independently from any reconfiguration being carried out by the technician standard ECUs automatically ch
62. nto the ABS off road mode by one of the other vehicle control modules using a J1939 message to the Bendix EC 80 controller If you need to know if a specific ECU uses a J1939 message to operate the lamp see the Controller Specifications box below Stop Lamp Switch SLS Bendix EC 80 ATC ECUs monitor the vehicle stop lamp status Certain vehicle functions such as ATC and All Wheel Drive AWD use the status of the stop lamp to know the driver s intention This can be provided to the ECU via J1939 communications or hardware input BENDIX EC 80 CONTROLLER OUTPUTS Bendix M 32 M 32QR and M 40X Pressure Modulator Valves PMV The Bendix M 32 M 32QR and M 40X pressure modulator valves PMV are operated by the Bendix EC 80 controller to modify driver applied air pressure to the service brakes during ABS or ATC activation See pages 6 8 The PMV is an electro pneumatic control valve and is the last valve that air passes through on its way to the brake chamber The modulator hold and release solenoids are activated to precisely modify the brake pressure during an antilock braking event The hold solenoid is normally open and the release solenoid is normally closed Controller Specifications If you need to know exact information about an ECU e g if it uses PLC serial communications etc e mail ABS Bendix com specifying the ECU part number or call 1 800 AIR BRAKE 1 800 247 2725 option 2 then 1 and speak to the Ben
63. o the ECU and or the diagnostic connector 4 The J1939 bus is overloaded with information and the RDU can not arbitrate access 5 Amalfunctioning RDU tool Bendix ACom Diagnostics Software Bendix ACom Diagnostics is a PC based software program and is designed to meet RP 1210 industry standards This software provides the technician with access to all the available ECU diagnostic information and configuration capability including e ECU information e Diagnostic trouble codes and repair information e Configuration ABS ATC and more e Wheel speed information e Perform component tests e Save and print information gigantea CONTRO Acom Diagnostics Diagnostic Software for ABS Bendix saa FIGURE 11 BENDIX ACOM DIAGNOSTICS When using ACom Diagnostics software to diagnose the Bendix EC 80 ABS ECU the computer s serial parallel or USB port needs to be connected to the vehicle s diagnostic connector For more information on ACom Diagnostics software or RP1210 compliant tools go to www bendix com or visit your local authorized Bendix parts outlet See pages 40 43 for Appendix J1939 SPN and FMI codes and their Bendix blink code equivalents www bendix com For the latest information and for free downloads of the Bendix ACom Diagnostics software and its User Guide visit the Bendix website at www bendix com Bendix Technical Assistance Team For direct telephone techn
64. oftware or the ProLink tool LED lights illuminate Diagnostic Trouble Codes 10 locations in total JA 3 a Z Z Bendix OR ABS DIAGNOSTICS FIGURE 9 THE BENDIX REMOTE DIAGNOSTIC UNIT RDU Bendix RDU Remote Diagnostic Unit The Bendix RDU tool Bendix part number K101596N001 provides the technician with a visual indication of Antilock Braking System ABS component Diagnostic Trouble Code DTC information The RDU tool is specifically designed for use with Bendix ABS systems and Bendix makes no claims for its operation and or usability with other brands of ABS systems Features of the Bendix RDU Tool The RDU tool attaches to the 9 pin diagnostic connector in the cab of the vehicle An adapter cable Bendix part number 5012793 is available to connect the RDU to vehicles with a 6 pin diagnostic connector See Figure 9 The RDU tool allows the technician to e Troubleshoot ABS system component problems using DTC reporting via LEDs e Reset DTCs on Bendix ABS ECUs by holding a magnet over the reset in the center of the RDU tool for less than 6 seconds Enter the Self Configuration Mode used by Bendix ABS ECUs by holding a magnet over the reset area for greater than 6 seconds but less than 30 seconds How the Bendix RDU Operates See Figure 7 for typical vehicle connector locations When the RDU tool is plugged into the diagnostic connector all the LEDs will illuminat
65. oper tools and observe all precautions pertaining to use of those tools 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 Ifthe vehicle is equipped with a Bendix AD IS air dryer system a configuration e Dash mounted tractor ABS indicator lamp e Service brake relay valve e Dash mounted trailer ABS indicator lamp used on all towing vehicles manufactured after March 1 2001 e Optional blink code activation switch e Optional ABS off road switch Off road feature is not available on all ECUs See Chart 1 Bendix DRM dryer reservoir module or a Bendix canine AD 9si air dryer be sure to drain the purge reservoir 90 Speed Sleeve Sensors Following the vehicle manufacturer s recommended procedures deactivate the electrical system in a manner that safely removes all electrical power from the vehicle Never exceed manufacturer s recommended pressures 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 Use only genuine Bendix brand replacement parts Straight Speed Sensors components and kits Replacement hardware tubing hose fittings etc must be of equivalent size type and strength as original equipmen
66. ot Used Not Used Not Used oor WM A Pin 7 8 9 10 11 12 Designation J1939 Low J1939 High Not Used WSS DA Right WSS DA Right ABS WL Ground Pin Designation 13 Not Used 14 Not Used 15 ABS WL Interlock 16 Battery 17 Retarder 18 ABS WL Bendix EC 80 ABS X2 Connector Pin Assignments Pin Designation PMV SA Left HLD PMV SA Left REL PMV SA Left CMN PMV SA Right HLD WSS SA Left PMV SA Right CMN oar Ga Wa Designation PMV SA Right REL WSS SA Left PMV DA Right CMN PMV DA Right HLD WSS SA Right PMV DA Left CMN Pin Designation 13 PMV DA Right REL 14 WSS SA Right 15 WSS DA Left 16 PMV DA Left HLD 17 PMV DA Left REL 18 WSS DA Left 30 Troubleshooting Connectors and Harnesses Continued Bendix EC 80 ATC Controller Wire Harness Connector Part Numbers and Pin Assignments Connector not used Bendix EC 80 ATC Controller Bendix EC 80 ATC versions utilize three AMP connectors for wire harness connections Connector Designation Number of Contacts AMP Part Number X1 17 1718091 1 X2 18 8 968974 1 X3 15 38 968973 1 Bendix EC 80 ATC X1 Connector Pin Assignments Pin Designation Pin Designation Pin Designation 1 Ground 7 J1939 Low 13 Not Used 2 Trailer ABS WL 8 J1939 High 14 Not Used 3 Ignition 9 SLS 15 ABS WL Interlock 4 TCV CMN 10 WSS DA Right 16 Battery 5 TCV 11 WSS DA Right 17 Retarder 6 ATCLamp ATCO
67. p will be flashing to indicate that the ECU is in the ABS Off road Mode Remove and re apply ignition power Check for short circuit condition between voltage and the I O 3 circuit Verify the resistance between the Input Output and voltage is open Verify that the resistance measured between the battery and HSA lamp output of the ECU is open Check the wiring between the ECU and the HSA lamp Check the condition and wiring of the HSA lamp Verify that there is no resistance measured between ground and the HSA solenoid Check for corroded or damaged wiring or connectors between the ECU and the HSA solenoid Verify that there is no resistance measured between voltage and the HSA solenoid Check for corroded or damaged wiring or connectors between the ECU and the HSA solenoid Verify brakes are operating correctly Verify that there is not over braking at one or more wheel end s Check the pneumatic plumbing and the exhaust port of the PCVs TCVs and relay valves and confirm that the air is being exhausted from all brake chambers Verify tire sizes on the vehicle match the ABS ECU configuration Verify wheel speed sensors and tone ring are properly adjusted and in good condition Verify tires are in good condition Verify pneumatic hoses are not twisted or kinked Verify that the brakes are operating correctly Verify that the wheel speed sensor and tone ring are properly adjusted Verify tire size Verify that there is no resistance measured
68. r wire PMV Pressure Modulator Valve An air valve which is used to vent or block air to the brake chambers to limit or reduce brake torque QR Quick Release Quick release valves allow faster release of air from the brake chamber after a brake application To balance the system quick release valves have hold off springs that produce higher crack pressures when the valves open Relay Valve Increases the application speed of the service brake Installed near brakes with larger air chambers type 24 or 30 The treadle valve activates the relay valve with an air signal The relay valve then connects its supply port to its delivery ports Equal length air hose must connect the delivery ports of the relay valve to the brake chambers Retarder Relay A relay which is used to disable a retarder when ABS is triggered RSP Roll Stability Program An all axle ABS solution that helps reduce vehicle speed by applying all vehicle brakes as needed reducing the tendency to roll over SAS Steering Angle Sensor Sensor Clamping Sleeve A beryllium copper sleeve which has fingers cut into it It is pressed between an ABS sensor and mounting hole to hold the sensor in place Stored Diagnostic Trouble Codes A diagnostic trouble code that occurred TCS Traction Control System another name for ATC or ASR Tone Ring Aring that is usually pressed into a wheel hub that has a series of teeth usually 100 and pro
69. r Signal 790 9 Wheel Speed Sensor 3 2 SA Right WSS Output Low Drive Off 790 10 Wheel Speed Sensor 3 4 SA Right WSS Loss of Sensor Signal 790 13 Wheel Speed Sensor 3 7 SA Right WSS Tire Size Calibration 791 1 Wheel Speed Sensor 4 1 DA Left WSS Excessive Air Gap 791 2 Wheel Speed Sensor 4 3 DA Left WSS Open or Shorted 791 7 Wheel Speed Sensor 4 5 DA Left WSS Wheel End 791 8 Wheel Speed Sensor 4 6 DA Left WSS Erratic Sensor Signal 791 9 Wheel Speed Sensor 4 2 DA Left WSS Output Low Drive Off 791 10 Wheel Speed Sensor 4 4 DA Left WSS Loss of Sensor Signal 791 13 Wheel Speed Sensor 4 7 DA Left WSS Tire Size Calibration 792 1 Wheel Speed Sensor 5 1 DA Right WSS Excessive Air Gap 792 2 Wheel Speed Sensor 5 3 DA Right WSS Open or Shorted 792 7 Wheel Speed Sensor 5 5 DA Right WSS Wheel End 792 8 Wheel Speed Sensor 5 6 DA Right WSS Erratic Sensor Signal 792 9 Wheel Speed Sensor 5 2 DA Right WSS Output Low Drive Off 792 10 Wheel Speed Sensor 5 4 DA Right WSS Loss of Sensor Signal 792 13 Wheel Speed Sensor 5 7 DA Right WSS Tire Size Calibration 793 1 Wheel Speed Sensor 14 1 AA Left WSS Excessive Air Gap 41 APPENDIX J1939 SPN and FMI Codes and their Bendix Blink Code Equivalents SPN FMI Bendix Blink Code Equivalent s J1939 J1939 General ue and Diagnostic Trouble Code
70. r which the lamp will extinguish if no Diagnostic Trouble Codes are detected The ECU will illuminate the ATC indicator lamp whenever ATC is disabled due to a Diagnostic Trouble Code Trailer ABS Indicator Lamp Operation Certain models of the ECU will control the Trailer ABS indicator lamp when a PLC signal SAE J2497 from a trailer ABS ECU is detected Pressure Modulator Valve Chuff Test Bendix EC 80 controllers will perform a Bendix patented Pressure Modulator Valve PMV Chuff Test The Chuff Test is an electrical and pneumatic PMV test that can assist maintenance personnel in verifying proper PMV wiring and installation With brake pressure applied a properly installed PMV will perform one sharp audible exhaust of air by activating the hold solenoid twice and the release solenoid once If the PMV is wired incorrectly it will produce two exhausts of air or none at all The Bendix EC 80 controller will perform a PMV chuff test on all installed modulators in the following order e Steer Axle Right PMV e Steer Axle Left PMV e Drive Axle Right PMV e Drive Axle Left PMV e Additional Axle Right PMV e Additional Axle Left PMV The pattern will then repeat itself See Figure 6 The ECU will not perform the PMV Chuff Test when wheel speed sensors show that the vehicle is in motion Right Right Steer Right Drive Additional m O Driver CD ep C Left Steer Left Drive Left Additional FIGURE 6 VE
71. road surface in front of the tire changing the rolling friction value Although vehicle stopping distance with a locked wheel may be shorter than corresponding stopping distance with ABS control vehicle steerability and stability is reduced Bendix EC 80 ATC controllers have an optional control mode that more effectively accommodates these soft road conditions to shorten stopping distance while maintaining optimal vehicle steerability and stability A WARNING The ABS off road mode should not be used on normal paved road surfaces because vehicle stability and steerability may be reduced The flashing ABS indicator lamp communicates the status of this mode to the driver The vehicle manufacturer should provide the optional ABS off road function only for vehicles that operate on unpaved surfaces or that are used in off road applications The vehicle OEM is responsible for ensuring that vehicles equipped with the ABS off road function meet all FMVSS 121 requirements and have adequate operator indicators and instructions The vehicle operator activates the off road function with a switch on the dash panel A flashing ABS indicator lamp indicates to the driver that the ABS off road function is engaged To exit the ABS off road mode depress and release the switch All Wheel Drive AWD Vehicles AWD vehicles with an engaged interaxle differential steer axle to rear axle AWD transfer case may have negative effects on A
72. s the blink code switch once and the ABS indicator lamp flashes a first group of two codes and if there are more trouble codes recorded this is followed by a second set of codes etc See page 18 for a directory of these codes All active trouble codes may also be retrieved using a hand held or PC based diagnostic tool such as the Bendix ACom Diagnostics software To clear active DTCs as problems are fixed simply clear or self heal by removing and re applying ignition power The only exception is for wheel speed sensor trouble codes which clear when power is removed re applied and the ECU detects valid wheel speed from all wheel speed sensors Alternately codes may be cleared by pressing the diagnostic blink code switch three 3 times to enter the Clear Active Diagnostic Trouble Code Mode or by using a hand held or PC based diagnostic tool Hand held or PC based diagnostic tools are able to clear wheel speed sensor trouble codes without the vehicle being driven Inactive Diagnostic Trouble Code Mode The ECU stores past trouble codes and comments such as configuration changes in its memory This record is commonly referred to as event history When an active trouble code is cleared the ECU stores it in the event history memory as an inactive trouble code Using blink codes the technician may review all inactive trouble codes stored on the ECU The ABS indicator lamp will display inactive diagnostic blink co
73. s until all blink code messages have been displayed and then returns to the normal operating mode During this time the ECU will ignore any additional blink code switch activation All trouble codes with the exception of voltage and J1939 trouble codes will remain in an active state for the remainder of the power cycle Voltage trouble codes will clear automatically when the voltage returns within the required limits AllABS functions will be re engaged J1939 trouble codes will clear automatically when communications are re established 14 DIAGNOSTIC MODES In order to communicate with the ECU the controller has several modes that the technician can select allowing information to be retrieved or other ECU functions to be accessed Diagnostic Modes To enter the various diagnostic modes No of Times to Press the System Mode Entered Blink Code Switch 1 Active Diagnostic Trouble Code DTC retrieval 2 Inactive DTC retrieval 3 Clear active DTCs 4 System configuration check 5 Dynamometer Test Mode ZC Reconfigure ECU To enter the Reconfiguration Mode the switch must be held in before the application of ignition power Once the power is supplied the switch is released and then pressed seven times CHART 3 DIAGNOSTIC MODES Active Diagnostic Trouble Code Mode For troubleshooting typically the active and inactive Diagnostic Trouble Retrieval Modes are used The technician presse
74. t and be designed FIGURE 2 BENDIX WS 24 WHEEL SPEED SENSORS Delivery attempt repairs requiring machining or welding unless specifically stated and approved by the vehicle and component manufacturer Prior to returning the vehicle to service make certain all components and systems are restored to their proper operating condition 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 The power MUST be temporarily disconnected from the radar sensor whenever any tests USING A DYNAMOMETER are conducted on a Bendix Wingman Advanced equipped vehicle You should consult the vehicle manufacturer s operating and service manuals and any related literature in conjunction with the Guidelines above YA specifically for such applications and systems M 32QR Port 2 M 32 Modulator Modulator Components with stripped threads or damaged parts WC E H should be replaced rather than repaired Do not oe SECH Supply YA N Electrical Connector Exhaust Port 3 M 40X Modulators FIGURE 3 BENDIX M 32 AND M 40X MODULATORS The Automatic Traction Control ATC function uses the following additional components e Traction control valve may be integral to the service brake relay valve or a stand alone
75. tic Traction Control ATC Event Flashes quickly Flashes quickly e The HSA lamp is illuminated only at power up or if an HSA DTC is present e If the driver disables HSA the HSA lamp will flash slowly Lamp OFF e Uses dash switch e Increases allowable wheel slip during ATC interventions e Not for firm road surfaces e Reduces wheel slip during acceleration at low speeds During Dynamometer Mode ABS System Lamp ON ATC Disabled Power e Disables ATC monitoring functions e When not in Dynamometer Mode an illuminated lamp indicates an ATC DTC is present Status Indicators at Start Up Powered Vehicle ABS Indicator Lamp Trailer ABS Indicator Lamp PLC Detected Trailer ABS Indicator Lamp PLC Not Detected Application 0 5 15 2 0 25 3 0 sec ON OFF ON OFF ON OFF ATC System Status Indicator at Start Up Gegen Application ATC enabled No ATC 0 5 15 2 0 25 3 0 sec CHART 2 BENDIX EC 80 INDICATOR LAMP BEHAVIOR Traction Control Valve TCV Bendix EC 80 ATC controllers will activate the TCV during The TCV may be a separate valve or integrated into the rear axle relay valve differential braking ATC events ABS Indicator Lamp Control with Optional Diagnostic Blink Code Switch Bendix EC 80 controllers have internal circuitry to control the ABS indicator lamp on the dash panel The ABS Lamp Illuminates 1 During power up
76. tion that interferes with the generation or transmission of response or control signals in the vehicle s ABS system that could lead to the functionality of the ABS system becoming inoperable in whole or in part FMVSS 121 Federal Motor Vehicle Safety Standard which regulates air brake systems HSA Hill Start Assist HSA interfaces between the transmission and braking system to help the driver prevent the vehicle from rolling downhill when moving up a steep incline from a stationary position IR Independent Regulation A control method in which a wheel is controlled at optimum slip a point where retardation and stability are maximized The brake pressure that is best for the wheel in question is directed individually into each brake chamber J1587 The SAE heavy duty standard diagnostic data link J1708 An SAE standard which defines the hardware and software protocol for implementing 9600 baud heavy vehicle data links J1587 version of a J1708 data link J1939 A high speed 250 000 baud data link used for communications between the ABS ECU engine transmission and retarders LAS Lateral Acceleration Sensor MIR Modified Independent Regulation Amethod of controlling the opposite sides of a steer axle during ABS operation so that torque steer and stopping distance are minimized PLC Power Line Carrier The serial communication protocol used to communicate with the trailer over the blue full time powe
77. uble code information over the serial communications diagnostic link as required Hand held or PC based diagnostic tools attach to the vehicle diagnostic connector typically located on or under the dash See Figure 7 FIGURE 7 TYPICAL VEHICLE DIAGNOSTIC CONNECTOR LOCATION J1939 BLINK CODES Blink codes allow a technician to troubleshoot ABS problems without using a hand held or PC based diagnostic tool Instead information about the ABS system is communicated by the ECU using the ABS indicator lamp to display sequences of blinks Note The ECU will not enter the diagnostic blink code mode if the wheel speed sensors show that the vehicle is in motion If the ECU is in the diagnostic blink code mode and then detects vehicle motion it will exit the blink code mode In addition by operating the blink code switch as described below one of several diagnostic modes can be entered See Diagnostic Modes below Blink Code Switch Activation When activating the blink code switch 1 Waitatleasttwo seconds after ignition on Except when entering Reconfiguration Mode see Reconfiguration section on page 11 2 For the ECU to recognize that the switch is activated on the technician must press for at least 0 1 seconds but less than 5 seconds If the switch is held for more than 5 seconds the ECU will register a malfunctioning switch 3 Pauses between pressing the switch when a sequence is required e g when ch
78. vides actuation for the speed sensor Note maximum run out is 008 YC Yaw Control Helps stabilize rotational dynamics of vehicle YRS Yaw Rate Sensor 39 Appendix J1939 SPN and FMI Codes and their Bendix Blink Code Equivalents APPENDIX J1939 SPN and FMI Codes and their Bendix Blink Code Equivalents 40 Bendix Blink Code Equivalent s ae rier Genera Diagnostic Trouble Code Description ist 2nd Digit Digit 154 13 Miscellaneous 12 23 1 0 2 or UO 3 Shorted High 168 3 Power Supply 6 2 Battery Voltage Too High 168 4 Power Supply 6 1 Battery Voltage Too Low 564 3 Miscellaneous 12 13 Diff Lock Solenoid Shorted to Voltage 564 4 Miscellaneous 12 12 Diff Lock Solenoid Shorted to Ground or Open Circuit 575 14 Miscellaneous 12 17 ABS Disabled Due to Off Road Mode 576 14 Miscellaneous 12 3 ATC Disabled or Dynamometer Test Mode Active 612 14 Miscellaneous 12 21 ABS Disabled Due to Engaged Differential Lock 614 3 Miscellaneous 12 23 103 Solenoid Shorted to Voltage 615 14 Miscellaneous 12 19 Maximum Number of PMV Cycles Exceeded 615 14 Miscellaneous 12 20 Maximum Number of TCV Cycles Exceeded 629 2 ECU 13 4 ECU 2678C 629 2 ECU 13 5 ECU 1C 629 2 ECU 13 7 Configuration Mismatch 629 2 ECU 13 17 ECU C8C 629 8 Miscellaneous 12 29 Air System Mechanical Component 629 12 ECU 13 3 ECU

BENDIX SD-13-4983 User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents