Fault Code 4340

Fault Code 4340

Stop Light Switch

Diagnostic conditions
- Ignition on
- Actuate brake pedal

Possible cause of fault
- Adjustment of stop light switch not OK
- Brake light switch faulty
- Short circuit to B+/ground or open circuit in control unit circuit
- PSM control unit faulty

Affected pins
Pin 32 and pin 37

Diagnosis/troubleshooting