DTC U0100: Engine CAN timeout; DTC U0101: CVT CAN timeout; DTC U0126: SAS CAN timeout; DTC U0141: ETACS CAN timeout; DTC U0114: 4WD CAN timeout: Diagnosis

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. Using scan tool MB991958, diagnose the CAN bus lines.
Use scan tool to diagnose the CAN bus lines.

Q: Is the check result normal?
1. YES: Go to Step 2.
2. NO: Repair the CAN bus lines (Refer to CAN BUS DIAGNOSTICS TABLE ). On completion, go to Step 4.
STEP 2. Check whether the DTC is set again.
Q: Is DTC U0100, U0101, U0126, U0141 or U0114 set?
1. YES: Go to Step 3.
2. NO: The procedure is complete.
STEP 3. Using scan tool MB991958, check read the DTC other system.
Use scan tool to check that other DTC is set in the ECU corresponding to the relevant diagnosis.

Q: Is other DTC set?
1. YES: Troubleshoot for the relevant DTC.
2. NO: Go to Step 4.
STEP 4. Using scan tool MB991958, check read the DTC other system.
Use scan tool to check if the same DTC (time-out) is set in the other ECU (CAN-C).

Q: Is any DTC set?
1. YES (DTC U0100 is set): Replace the engine control module (ECM), and then go to Step 5.
2. YES (DTC U0101 is set): Replace the TCM, and then go to Step 5.
3. YES (DTC U0126 is set): Replace steering wheel sensor, and then go to Step 5.
4. YES (DTC U0141 is set): Replace the ETACS-ECU, and then go to Step 5.
5. YES (DTC U0114 is set): Replace the AWD-ECU, and then go to Step 5.
6. NO (No DTC is set.): The procedure is complete.
STEP 5. Check whether the DTC is set again.
Erase the DTC.

Q: Is DTC U0100, U0101, U0126, U0141 or U0114 set?
1. YES: Replace the hydraulic unit (integrated with ASC-ECU) (Refer to HYDRAULIC UNIT ).
2. NO: The procedure is complete.