Complaint Troubleshooting

COMPLAINT: ABS and ASR warning lamps continue to LIGHT after the engine starts until the IGNITION is turned OFF.

POSSIBLE CAUSE ACTION: TEST STEP/ADAPTER POSITION


Solenoid Valve Relay 2/1, 7/2
Overvoltage Protection Relay 3/1, 5/1



COMPLAINT: ABS and ASR warning lamps LIGHT after a vehicle speed of approx. 5 km/h (3 mph) is exceeded until the IGNITION is turned OFF

POSSIBLE CAUSE ACTION: TEST STEP/ADAPTER POSITION


Solenoid Valve Relay 2/1, 7/2
Return Pressure Pump Relay 26/8
Return Pressure Pump


Solenoid Valves 20/8, 21/9, 22/10, 23/11




COMPLAINT: ABS and ASR warning lamps LIGHT during driving, until IGNITION is turned OFF.


POSSIBLE CAUSE ACTION: TEST STEP/ADAPTER POSITION


Wheel Speed Sensors 24/4, 27/5, 30/6, 33/7

ASR Charging Pump 39/2, 40/8

ABS/ASR Control Unit Replace ABS/ASR Control Unit




COMPLAINT: ASR warning lamp LIGHTS during driving (but the electronic accelerator does not go into "limp-home" mode), until IGNITION is turned OFF.


POSSIBLE CAUSE ACTION: TEST STEP/ADAPTER POSITION


ASR Charging Pump 39/2, 40/8

Return/Pressure Pump, Perform HYDRAULIC SYSTEM TEST or
Pressure Reservoir, ELECTRONIC ACCELERATOR SYSTEM TEST
Hydraulic Lines, and
leaking connections






COMPLAINT: ASR warning lamp LIGHTS during driving; electronic accelerator goes into "limp-home" mode (pedal is hard to move after a short freeplay), until IGNITION is turned OFF.


POSSIBLE CAUSE ACTION: TEST STEP/ADAPTER POSITION


Electronic Accelerator Pedal System ELECTRONIC ACCELERATOR SYSTEM TEST





COMPLAINT: ASR warning lamp LIGHTS during engine start-up and afterwards, until IGNITION is turned OFF.


POSSIBLE CAUSE ACTION: TEST STEP/ADAPTER POSITION


Switchover Solenoid Valve 36/-




COMPLAINT: ABS warning lamp LIGHTS during driving or at engine start-up, and either flickers or goes out before the IGNITION is turned OFF.

POSSIBLE CAUSE ACTION: TEST STEP/ADAPTER POSITION


Overvoltage Protection Relay 1/1, 3/1

Ground Connections Refer to ELECTRICAL AND ELECTRONIC DIAGRAMS