Initial Inspection and Diagnostic Overview

Immobilizer Control System Check



1. Immobilizer indicator light ON check

Turn ignition switch to ON position using ignition key.

Does immobilizer indicator light come on?
YES
Go to Step 2.
NO
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 DTC Check.

Is DTC P1636 or P1638 detected?
YES
Go to applicable DTC troubleshooting.
NO
Go to Step 3.

3. Immobilizer indicator light flash check

Does immobilizer indicator light flash on and off continuously in Step 1?
YES
Check ECM for DTC referring to DTC Check. Then, go to applicable DTC troubleshooting.
NO
Go to Step 4.

4. Engine start check

Start engine using ignition key.

Does engine start?
YES
Go to Step 5.
NO
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?
YES
Go to Immobilizer Indicator Light Remains ON after Engine Starts.
NO
Immobilizer control system is in good condition. Then, go to Keyless Start System Check
for keyless start model.