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5.2 Acceleration Slip Regulation (ASR)   >   33 Hydraulic Test Program - Test

Test step DTC Test scope Test connection Test condition Nominal value Possible cause/Remedy 1.0 ASR charging pump (M15) 10 bar at connection "SP" Ignition: ON (for a maximum of 60 s) 1.8 - 11 bar Wiring, Hydraulic connections leaking, M15 41 68 2.0 ABS/ASR hydraulic unit, high-pressure/return pump (A7/3m1) and pressure reservoir 250 bar at connection "SP" Engine: at Idle Pressure increases quickly to 50 - 110 bar, then increase slowly to 150 - 200 bar. Charging time: maximum of 60 s Hydraulic connections leaking. If there is no pressure increase, or the increase takes too long (more than 60 s): 23 22.0, A7/3. If the pressure increase quickly to < 50 bar, and then slowly increases to maximum value, or then increases quickly and steadily to maximum value: Replace pressure reservoir.