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 3.
NO : Repair the CAN bus lines. (Refer to TROUBLESHOOTING .) After repairing the CAN bus line, go to Step 2.
- STEP 2. Check whether the DTC is reset.
Q: Is DTC No. C1615 set?
YES : Go to Step 3.
NO : This diagnosis is complete.
- STEP 3. Scan tool diagnostic trouble code
Check if the ASC diagnostic trouble code No. U0251, U0435, or U0440 is set. (Refer to TROUBLESHOOTING .)
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 4.
- STEP 4. Scan tool diagnostic trouble code
Check other AWC diagnostic trouble code.(Refer to DIAGNOSTIC TROUBLE CODE CHART .)
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 5.
- STEP 5. Check whether the DTC is reset.
Q: Is DTC No. C1615 set?
YES : Replace the AWC-ECU.(Refer to AWC-ECU .)
NO : Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)