COMBI Instrument cluster power supply: Procedure

If there is an impairment (e.g. time was lost; see above symptoms), the test module 'Energy diagnosis' helps in finding the cause of the problem in the vehicle energy system: run the test module.

If the vehicle had a breakdown due to a flat battery despite the reset or cutoff of terminal 30F, it is usually the case that the control modules supplied via this terminal are not the likely cause.