Kessy/Immobiliser

Fault code 0526

Brake light switch

Diagnostic conditions
- Ignition on
- Internal function test on KESSY control unit

Possible cause of fault
- Open circuit in CAN comfort (no signal/communication)
- KESSY control unit faulty

Affected pins
KESSY control unit, connector A:
- Pin 23 'CAN comfort (low)'
- Pin 24 'CAN comfort (high)'

Diagnosis/troubleshooting