Diagnosis instruction

A random collection of fault codes can be entered in the fault memory of the engine management system if there was inadequate onboard supply voltage (e.g. due to deep discharge of the battery) or if there was a failure or contact fault of the digital motor electronics main relay.

If the faults 2ACB digital motor electronics main relay, activation and 2ACC digital motor electronics main relay, shift delay  , are stored either individually or jointly in the engine management system, all of the fault memory content stored at the same mileage in the vehicle is to be ignored and deleted.

Under no circumstances may the engine management system be replaced!