Diagnosis Of Immobilizer Faults

The following table shows the assignment of immobilizer related faults to each type:

DIAGNOSTIC CODES CHART

Immobilizer Related Faults	Fault types	Diagnostic codes
Transponder key fault	Transponder not in password mode. Transponder transport data has been changed.	P1674 (Transponder status error)
Transponder key fault	Corrupted data from transponder More than one transponder in the magnetic field (Antenna coil)	P1675 (Transponder programming error)
SMARTRA fault	Invalid message from SMARTRA to ECM.	P1676 (SMARTRA message error)
SMARTRA fault	No response from SMARTRA (Communication Line Error - Open or Short etc.)	P1690 (SMARTRA no response)
Antenna coil fault	Antenna coil open/short circuit	P1691 (Antenna coil error)
Transponder key fault	Corrupted data from transponder More than one transponder in the magnetic field (Antenna coil)	P1693 (Transponder no response error/invalid response)
ECM fault	Request from ECM is invalid (Protocol layer violation-Invalid request, check sum error etc.)	P1694 (ECU signal error)
ECM internal permanent memory (EEPROM) fault	ECM internal permanent memory (EEPROM) fault Invalid write operation to permanent memory (EEPROM)	P1695 (EMS memory error)
Invalid key fault	Virgin transponder at EMS status "Learnt" Learnt (Invalid) Transponder at EMS status "Learnt" (Authentication fail)	P1696 (Authentication fail)
Locked by timer	Exceeding the maximum limit of Twice IGN ON ( 32 times)	P1699 (Twice IG ON over trial)