STEP 2. Using scan tool (M.U.T.-III), read the diagnostic trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) Read the immobilizer-DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is the immobilizer-DTC set?
Refer to GROUP 42B, Diagnosis <OSS-ECU> - Diagnostic Trouble Code Chart <Vehicles with KOS> or GROUP 54A, Immobilizer System - Diagnostic Trouble Code Chart <Vehicles without KOS> . Go to Step 3.