Immobilizer Control Unit (ICU) supplies power to the coil antenna, receives and analyses signal from the transponder, transmits signal to engine ECM/PCM and stores VIN(Not the number on the bulkhead of vehicle but Vehicle Identification Number for Immobilizer ) data which composes of ID code and password.
ICU stores VIN which composes of ID code and password. This DTC is defined that VIN of EMS is inconsistent data of ICU.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Data status receiving from ECM/PCM | 1. Faulty ECM/PCM 2. Faulty ICU |
Threshold value |
•
Difference between VIN data from EMS and "LEARNT" Immobilizer in authentication procedure | |
Detecting time |
•
1 time | |
DTC Erasing Condition |
•
Without a fault or using a GDS |
Fig.1) A normal signal waveform of antenna and immobilizer communication when IG key(TP: Transponder) is OFF to ON.
