In the Ignition ON position, the PCM receives information from the ICM and permits injection to take place If the CODE memorized in PCM is coincided with ICM.
When the ID code from the transponder is verified by the ICM then the registering sequence is complete and a answer signal is sent to the PCM.
The ICM sends a START or NO START signal to the PCM.
The DTC will set, there is no data transmitted from PCM for 5 seconds after ignition ON.
Item
Detecting Condition
Possible Cause
DTC Strategy
CAN Data status receiving from PCM
Open or Short in harness between PCM and ICU
Faulty PCM
Faulty ICU
Threshold value
No data transmitted from PCM for 5 seconds after ignition ON
Detecting time
1 time
DTC Erasing
Condition
Without a fault or using a scantool
Fig.1) A normal signal waveform of antenna and immobilizer communication when IG key(TP: Transponder) is OFF to ON.