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. C1617 set?
YES : Go to Step 3.
NO : This diagnosis is complete.
- STEP 3. Scan tool diagnostic trouble code
Check if the AWC-related DTC No. U0100, U0101, U0121, U0126, or U0141 is set.(Refer to DIAGNOSTIC TROUBLE CODE CHART .)
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 4.
- STEP 4. Scan tool diagnostic trouble code
- Check the engine diagnostic trouble code. (Refer to TROUBLESHOOTING .)
- Check the ASC diagnostic trouble code. (Refer to TROUBLESHOOTING .)
- Check the ETACS diagnostic trouble code. (Refer to TROUBLESHOOTING .)
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. C1617 set?
YES : Replace the AWC-ECU.(Refer to AWC-ECU .) Then go to Step 6.
NO : Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
- STEP 6. Check whether the DTC is reset.
Q: Is DTC No. C1613 set?
YES : Return to Step 1.
NO : This diagnosis is complete.