In most cases, partial ABS is still available. The ECU will illuminate the ABS Indicator Lamp whenever full ABS operation is not available due to a diagnostic trouble code. Dash Lamps ABS Lamps that do not illuminate as expected when ignition power is applied, or remain illuminated, indicate the need for maintenance.ĪBS Indicator Lamp Operation (Bulb Check) 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. ![]() INDICATOR LAMPS AND POWER-UP SEQUENCE NOTICE: The vehicle operator should verify proper operation of all installed indicator lamps (ABS, ATC/ESP, and trailer ABS) when applying ignition power and during vehicle operation. When configured to use this output, the ECU will energize the retarder disable relay and inhibit the use of the retarder as needed. The retarder relay disable output may be used to control a retarder disable relay. The TCV may be a separate valve or integrated into the rear axle relay valve. Traction Control Valve (TCV) Retarder Relay Disable Output Advanced Bendix EC-60 controllers use two TCVs, one on the steer axle and one on the drive axle. In some cases, ECUs may also be put into the ABS off-road mode by one of the other vehicle control modules, using a J1939 message to the Bendix EC-60 controller. See "Optional ABS Off-Road Mode" on page 10 for further details. Optional ABS Off-Road Switch and Indicator Lamp Operation Advanced Bendix EC-60 controllers use an optional dashmounted switch for the operator to place the ECU into the ABS off-road mode. The battery input is connected through a 30 amp fuse directly to the battery. The ECU operates at a nominal supply voltage of 12 or 24 volts, depending on the ECU. Optional ATC mud/snow switch (sometimes referred to as an ATC off-road switch) The EC-60 controller Hill Start Feature utiliĪdvanced Bendix EC-60 Controllers USE Power Line Carrier (PLC) Bendix EC-60 CONTROLLER INPUTS All new towing vehicles built since Mahave had an in-cab trailer ABS Indicator Lamp installed.Stop lamp switch input (may be provided using the ECU hardware input or J1939).J1939 serial communication to engine control module. ![]()
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