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5.1 Acceleration Slip Regulation (ASR)   >   12 Diagnosis - Complaint Related Diagnostic Chart

Complaint/Problem Possible cause Test step/Remedy 1) ABS and ASR malfunction indicator lamps remain lit after starting engine, until ignition is switched OFF. Switchover/solenoid valve (A7/3y5) Overvoltage protection relay module (87E, 7-pole ) (K1/1) 23 35.0, 23 3.0, 5.0. ABS and ASR malfunction indicator lamps come on after exceeding a speed of approx. 5 km/h (3mph), until ignition is switched OFF. Solenoid valve relay (A7/3k1) Return/pressure pump relay (A7/3k2) Return/pressure pump motor (A7/3m1) ASR charging pump (M15) 23 2.0, 7.0, 23 25.0, 23 39.0. ABS and ASR malfunction indicator lamps come on while driving, until ignition is switched OFF. Vehicle speed sensor (L6/1, L6/2, L6/3, L6/4) ASR charging pump (M15) ABS/ASR control module (N30/1) 23 23.0, 26.0, 29.0, 32.0, 38.0, 39.0, ABS/ASR control module (N30/1). ASR malfunction indicator lamp comes on while driving (electronic accelerator does not enter "limp-home" mode), until ignition is switched OFF. ASR charging pump (M15) Return/pressure pump motor (A7/3m1), pressure reservoir, hydraulic lines, connections leaking. 23 38.0, 39.0, 33, Engines, Volume 3, section 6.1 ASR malfunction indicator lamp comes on while driving, electronic accelerator enters "limp-home" mode, (after brief free play, greater pedal effort required), until the ignition is switched OFF. Electronic accelerator Engines, Volume 3, section 6.1 1) Observe Preparation for Test, see 22.