Operation CHARM: Car repair manuals for everyone.

Fault Code 0924

Fault code 0924

Headlight cleaning system relay

Diagnostic conditions
- Ignition on
- Internal control module function test
- Headlight cleaning system coded
- Dipped beam on
- Front washer on/off

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.

Affected pins
Plug 'J' on vehicle electrical system control module:
- Pin 11 'output to headlight cleaning system relay'

Diagnosis/troubleshooting

NOTE
- Before replacing the control module, the ground connections, power supply and plug connections on the control module must be checked.
- When replacing the vehicle electrical system control module, observe the coding of the control module.
- After the test drive, read out the fault memory with the Porsche System Tester II No. 9588 again. Additional causes of faults that could damage the vehicle electrical system control module should be detected and remedied.