Fault Code 42

Fault Code 42

Wrong Key or Wrong Transponder Pill

Diagnostic conditions
- Ignition on

Possible cause of fault
- Wrong transponder - not adapted to the vehicle
- Short circuit to ground/voltage or open circuit in the wiring between the signal converter and alarm system control module

Affected terminals
- Plug A, terminals 3 and 4

Diagnosis/troubleshooting




Work instructions 1 - 4




Work instructions 5 - 9