Diagnostic Procedure
- STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the CAN bus lines. (Refer to TROUBLESHOOTING .)
- STEP 2. Scan tool diagnostic trouble code
Check the ETACS diagnostic trouble code. (Refer to TROUBLESHOOTING .)
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 3.
- STEP 3. ETACS-ECU coding data check
Using the scan tool, check if there is any abnormality to the coding data stored in the ETACS-ECU. (Refer to CODING REFERENCE TABLE .)
Q: Is the check result normal?
YES : Go to Step 4.
NO : Replace the ETACS-ECU. (Refer to ETACS-ECU .) Then go to Step 5.
- STEP 4. Check whether the DTC is reset.
Q: Is DTC No. U1415 set?
YES : Replace the AWC-ECU.(Refer to AWC-ECU .) Then go to Step 5.
NO : Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
- STEP 5. Check whether the DTC is reset.
Q: Is DTC No. U1415 set?
YES : Return to Step 1.
NO : This diagnosis is complete.