The PCM controls the engine, in a normal way for starting and running, and starts communication with the Smart Key PCM, sending a PIN request to the Smart Key PCM and waiting for valid release message from it until the release time period has ended.
In case of Smart Key PCM immobilizer function is locked, the Smart Key PCM answer is the no release message. PCM enters in the locked state, which causes theactivation of the imobilization actions of the engine.
In case of Smart Key PCM immobilizer function state is released, the Smart Key PCM answer is the release message, including the information Smart Key PCM inlearnt mode and the PIN code.
DTC P1690 is set PCM has not received any signals related starting engine, Although PCM sends wake up signal to Smart Key PCM.
Item
Detecting Condition
Possible Cause
Enable Conditions
IG ON
Open or short in circuit
Faulty Smart Key PCM
Detecting time
1.5 seconds
Threshold value
No response form Smart Key PCM
(Communication line error - Open or short)