Possible causes of fault
- 'Short circuit to ground' No headlight cleaning in the event of a 'short circuit to ground' in the line or relay.
- 'Open circuit/short circuit to B+' No headlight cleaning in the event of an 'open circuit' in the line or relay.
- 'Open circuit/short circuit to B+' Continuous activation of headlight cleaning system in the event of a 'short circuit to B+' in the line or relay, even when front washer is switched off.