When the ID code from the transponder is verified by the ICU then the registering sequence is complete and a answer signal is sent to the EMS.
The ICU sends a START or NO START signal to the EMS.
The DTC will set, if the data checksum sent by EMS and ICU is different.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CAN Data status receiving from ECM/PCM | 1. Faulty ECM/PCM 2. Faulty ICU |
Threshold value |
•
Data frame error
•
Check sum error
•
Message error | |
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.
