STEP 6. Using scan tool (M.U.T.-III), diagnose CAN bus line.
(1) Turn the ignition switch to the "ON" position.
(2) Diagnose CAN bus line.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is the CAN bus line normal?
Refer to, Inspection Procedure - Power Supply System and Ignition Switch-IG System . Repair the CAN bus line. Refer to GROUP 54C, Diagnosis - CAN Bus Diagnostics Table . Then confirm that the malfunction symptom is eliminated.