Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.

Required Special Tools:

MB991958 Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827 M.U.T.-III USB Cable
- MB991910 M.U.T.-III Main Harness A

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.

Q: Is the check result normal?
1. YES: Go to Step 2.
2. NO: Repair the CAN bus lines. After repairing the CAN bus line, go to Step 2.
STEP 2. Scan tool diagnostic trouble code.
Check the engine diagnostic trouble code.

Q: Is the DTC set?
1. YES: Perform the relevant troubleshooting.
2. NO: Go to Step 3.
STEP 3. Check whether the DTC is reset.
After 30 seconds with the engine idle status, check that the DTC is reset.

Q: Is DTC No. P1874 set?
1. YES: Replace the clutch assembly. (Refer to TRANSAXLE .) After replacing the clutch assembly, go to Step 4.
2. NO: Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
STEP 4. Check whether the DTC is reset.
After 30 seconds with the engine idle status, check that the DTC is reset.

Q: Is DTC No. P1874 set?
1. YES: Replace the mechatronic assembly. (Refer to << A >> MECHATRONIC ASSEMBLY REMOVAL .)
2. NO: Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)