STEP 2. Using scan tool (M.U.T.-III), diagnose the CAN bus line
(1) Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III) ." (2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the CAN bus line found to be normal?
Go to Step 3. Repair the CAN bus line (Refer to GROUP 54C - Diagnosis ). On completion, go to Step 3.