PSM 5.3 and 5.7
Fault code 4340Stop light switch
Diagnostic conditions
- Ignition on
Possible cause of fault
- Short circuit to ground/B+ or open circuit
- Wiring/ plug connection faulty
- Mechanism of the stop light switch not OK
- Adjustment of the stop light switch not OK
- Pressure sensor plausibility
Affected terminals
PSM 5.7 terminals 32, 37
PSM 5.3 terminals 42, 48
Diagnosis/troubleshooting PSM 5.7
Diagnosis/troubleshooting PSM 5.3
