ABS 5.7

Fault code 4340

Stop light switch

Diagnostic conditions
- Ignition on
- Actuate brake pedal

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

Affected pins
Pin 32 and pin 37

Diagnosis/troubleshooting