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10.1 ESP and SPS   >   11 Diagnosis - Function Test

Test step/Test scope Test condition Nominal value Possible cause/Remedy 1) 1.0 Brake torque control circuit Test cables are not to be hooked up to the HHT while performing function tests. Lift rear of vehicle so that both rear wheels can be rotated freely. Secure vehicle ! Engine: at Idle Selector lever in transmission range "D". Apply WOT using accelerator pedal. CAUTION! Should ASR not come into effect: Release accelerator pedal to idle speed. The rear wheels are noticeably braked; simultaneously the high-pressure/ return pump can audibly be heard operating. Engine speed is reduced to approx. 1000 rpm. The ESP warning lamp blinks. 23, DM, Engines, Vol. 4, section 9. 2.0 ESP off function using ESP OFF switch (S76/6) Engine: at Idle Selector lever in "N". Press ESP OFF switch (S76/6). Selector lever in transmission range "D". Slowly depress accelerator pedal. The ESP warning lamp illuminates. Engine speed is not reduced. The rear wheels are not braked. The ESP warning lamp blinks. 23 25.0 1) Observe Preparation for Test, see 22.