STEP 1. Using scan tool MB991958, diagnose the CAN bus line
(1) caution | To prevent damage to scan tool (MB991958), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (MB991958). |
Connect scan tool MB991958. Refer to "How to connect the scan tool (M.U.T.-III)
."
(2) Turn the power supply mode of the engine switch to ON.
(3) Diagnose the CAN bus line.
(4) Turn the power supply mode of the engine switch to OFF.
Is the CAN bus line found to be normal?
Go to Step 2. Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 2.