BENDIX TCH-013-022 User's Manual
Contents
1. Bulletin No TCH 013 022 Effective Date 11 2 2012 Technical Bulletin Ea m nae Page 1 of 2 Cancels N A subject Modifications for J1922 Engine Communications When Using non J1922 Bendix EC 30 Electronic Controller Unit ECU Replacements REPLACEMENT ECUs HAVE A LABEL ECU DOES NOT SUPPORT IN CAB TRAILER ABS WARNING LAMP PLC OR J1922 ENGINE COMMUNICATIONS FIGURE 1 BENDIX EC 30 ANTILOCK ECU Service replacement Bendix EC 30 service ECUs no longer support J1922 engine communications If the original ECU on the vehicle used the J1922 engine link to control the retarder and or engine traction control this Bulletin covers the necessary procedures to enable the continued support of these functions Before beginning service work ask the engine OEM if the engine Electronic Control Module ECM can be upgraded to support J1939 engine communications For vehicles where this option is available follow the J1939 Upgrade Procedure otherwise follow the Hard Wire Procedure Note The J1939 upgrade procedure provides J1939 retarder control and ATC engine and brake control while the hard wire procedure only provides retarder control In all cases follow the General Safety Guidelines shown on page two J1939 UPGRADE PROCEDURE 1 Add two 18 gauge twisted pair wires to the harness 30 pin connector to pin C3 J1939 H and pin D3 J1939 L C3 and D3 connect to the J1939 bus Consult the vehicle OEM f2. Bendix none 2012 Bendix Commercial Vehicle Systems LLC a member of the Knorr Bremse Group 11 12 All Rights Reserved
3. key should be removed Where circumstances require that the engine be in operation EXTREME CAUTION should be used to prevent personal injury resulting from contact with moving rotating leaking heated or electrically charged components Do not attempt to install remove disassemble or assemble a component until you have read and thoroughly understand the recommended procedures Use only the proper tools and observe all precautions pertaining to use of those tools If the work is being performed on the vehicle s air brake system or any auxiliary pressurized air systems make certain to drain the air pressure from all reservoirs before beginning ANY work on the vehicle If the vehicle is equipped with a Bendix AD IS air dryer system or a dryer reservoir module be sure to drain the purge reservoir Cancels N A Page 2 of 2 Ignition 4 The ECU will now be configured for ABS only with retarder control supplied via the retarder relay Note ATC has been disabled The ATC dash lamp will NOT illuminate at any time including during the vehicle start up bulb check 5 Verify proper configuration using the LEDs on the ECU or by using a diagnostic tool Note This hard wire procedure only provides retarder control Please have the following information available Bendix product model number part number and configuration vehicle make and model vehicle configuration e g number of axles tire size Reference The ful
4. HGF EDCBA K1 FIGURE 4 RELAY SWITCH WIRING DIAGRAM Step Two Enable Retarder 2 3 Make the connections to the vehicle per the wiring diagram See Figure 3 To allow the ECU to continue to disable the retarder add one 18 gauge twisted pair of wires on the 30 pin connector Connect pin K1 Retarder Relay Connect the relay to power and the retarder connection of the ECU Additionally the ECU will need to be reconfigured to only expect a retarder relay using a self configuration that can be performed by a diagnostic tool such as Bendix ACom Diagnostics or a Bendix RDU unit Bendix Technical Assistance Team For direct telephone technical support call the Bendix Tech Team at 1 800 AIR BRAKE 1 800 247 2725 option 2 then option 1 Representative are available Monday through Thursday 8 00 A M to 6 00 P M Friday 8 00 A M to 5 00 P M ET Or if you prefer e mail the Tech Team at techteam bendix com GENERAL SAFETY GUIDELINES A WARNING PLEASE READ AND FOLLOW THESE INSTRUCTIONS TO AVOID PERSONAL INJURY OR DEATH When working on or around a vehicle the following general precautions should be observed at all times 1 Park the vehicle on a level surface apply the parking brakes and always block the wheels Always wear safety glasses Stop the engine and remove ignition key when working under or around the vehicle When working in the engine compartment the engine should be shut off and the ignition
5. l Service Data sheet for the Bendix EC 30 ABS ATC Controller is SD 13 4815 BW1 794 and is available for download on www bendix com You can also order copies from the online Bendix Literature Center 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 components and kits Replacement hardware tubing hose fittings etc must be of equivalent size type and strength as original equipment and be designed specifically for such applications and systems Components with stripped threads or damaged parts should be replaced rather than repaired Do not attempt repairs requiring machining or welding unless specifically stated and approved by the vehicle and component manufacturer 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
6. or assistance in connecting to the J1939 bus 2 Make the connections to the vehicle per the wiring diagram See Figure 2 For J1939 engine communications add wires C3 and D3 FIGURE 2 WIRING DIAGRAM FOR J1939 CONNECTION 3 Reconfigure the ECU by using a diagnostic tool or diagnostic software 4 The ECU needs to be configured for ABS and Automatic Traction Control ATC and retarder control via J1939 Verify the proper configuration using the LEDs on the ECU or by using a diagnostic tool Note The J1939 upgrade procedure provides J1939 retarder control and ATC engine and brake control HARD WIRE PROCEDURE NOTE If the engine ECM can not be upgraded to support J1939 communications the automatic traction control function including both the brake and engine limiting functions will need to be disabled The retarder control will now be hard wired A good quality automotive relay will be required to complete this procedure and connect the ECU to the retarder Step One Disable Automatic Traction Control for Both the Engine and Brake 1 Gain access to the 18 pin harness connector Remove the wires that were connected to the D2 and D3 pins Traction Modulator Source Traction Modulator Sink Common FIGURE 3 18 PIN CONNECTOR Bulletin No TCH 013 022 Effective Date 11 2 2012 Chassis Ground Retarder Disable Relay Sink KJ
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