Immobilizer Control System Check

IMMOBILIZER CONTROL SYSTEM DIAGNOSIS CHART

Step	Action	YES	NO
1	Immobilizer indicator light ON check Turn ignition switch to ON position using ignition key. Does immobilizer indicator light come on?	Go to Step 2.	Go to IMMOBILIZER INDICATOR LIGHT DOES NOT COME ON WITH IGNITION SWITCH ON AND ENGINE STOP .
2	DTC check Check ECM for DTC referring to DTC CHECK . Is DTC P1636 or P1638 detected?	Go to applicable DTC troubleshooting.	Go to Step 3.
3	Immobilizer indicator light flash check Does immobilizer indicator light flash on and off continuously in Step 1?	Check ECM for DTC referring to DTC CHECK . Then, go to applicable DTC troubleshooting.	Go to Step 4.
4	Engine start check Start engine using ignition key. Does engine start?	Go to Step 5.	Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
5	Immobilizer indicator light remains ON check Check if immobilizer indicator light remains ON after engine starts. Does immobilizer indicator light remains ON after engine starts?	Go to IMMOBILIZER INDICATOR LIGHT REMAINS ON AFTER ENGINE STARTS .	Immobilizer control system is in good condition. Then, go to KEYLESS START SYSTEM CHECK for keyless start model.