STEP 1. Battery voltage check
STEP 2. Generator output current check
STEP 3. Voltage measurement at the ETACS-ECU connector
(1) Disconnect the C-408 ETACS-ECU connector.
(2) Measure the voltage between the C-408 harness side connector terminal No.1 and the body ground.OK: System voltage
Is the check result normal?
Go to Step 5. Go to Step 4.
STEP 4. Wiring harness check
STEP 5. Scan tool MB991958 CAN bus diagnostics
STEP 6. Check whether the DTC is stored again after repairing the CAN bus line.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is stored.
Is DTC C2101 stored?
Go to Step 7. The procedure is complete.
STEP 7. Check whether the DTC is stored again.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is stored.
Is DTC C2101 stored?
Replace AWD-ECU (Refer to ). Then go to Step 8. The trouble can be an intermittent malfunction (Refer to GROUP 00 - Troubleshooting/How to Cope with Intermittent Malfunctions ).
STEP 8. Check whether the DTC is stored again.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is stored.
Is DTC C2101 stored?
Diagnose again from Step 1. The procedure is complete.