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5.3 Acceleration Slip Regulation (ASR)   >   11 Diagnosis - Function Test

Test step/Test sequence Test condition Nominal value Possible cause/Remedy 1) 1.0 Brake torque control circuit Lift rear of vehicle so that both rear wheels can be rotated freely. Secure vehicle Engine: Start Selector lever in transmission range "D". Apply full throttle using accelerator pedal. CAUTION! Should ASR not come into effect: Reduce throttle to an idle immediately. The rear wheels are noticebly braked; simultaneously the return/pressure pump can be audibly heard operating. Engine speed is reduced to appprox. 1000 rpm. 23, 33, Diagnostic Manual, Engines, Vol. 3, section 6.4 1) Observe Preparation for Test, see 22.