STEP 1. Battery voltage check
STEP 2. 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 4. Go to Step 3.
STEP 3. Wiring harness check
STEP 4. Scan tool MB991958 CAN bus diagnostics
STEP 5. Check whether the DTC is reset 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) Start the engine, and continue to run at 1500 r/min or more.
(4) Check if the DTC is set.
Is the DTC C2100 set?
Go to Step 6. The procedure is complete.
STEP 6. Check the following connector:
STEP 7. Wiring harness check
STEP 8. Voltage measurement at the AWD-ECU connector
(1) Disconnect the C-228 AWD-ECU connector.
(2) Measure the voltage between the C-228 wiring harness side connector terminals No.3, No. 4 (Ignition switch "ON") and the body ground.OK: System voltage
Is the check result normal?
Go to Step 9. Go to Step 10.
STEP 9. Wiring harness check
STEP 10. Wiring harness check
STEP 11. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Start the engine, and continue to run at 1500 r/min or more.
(4) Check if the DTC is set.
Is the DTC C2100 set?
Replace AWD-ECU (Refer to ). Then go to Step 12. The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).
STEP 12. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Start the engine, and continue to run at 1500 r/min or more.
(4) Check if the DTC is set.
Is the DTC C2100 set?
Diagnose again from Step 1. The procedure is complete.