DTC U0141: ETACS CAN Timeout: Diagnosis
Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicles Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
- STEP 1. Using scan tool MB991958, diagnose the CAN bus line CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
- Connect scan tool MB991958. Refer to "HOW TO CONNECT THE SCAN TOOL ."
- Turn the ignition switch to the "ON" position.
- Diagnose the CAN bus line.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
- YES: Go to Step 2.
- NO: Repair the CAN bus line (Refer to DIAGNOSIS ).
- STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code
Check again if the DTC is stored in the ETACS-ECU.
Q: Is the DTC stored?
- YES: Diagnose the ETACS-ECU. Then go to Step 4.
- NO: Go to Step 3.
- STEP 3. Using scan tool MB991958, read diagnostic trouble code No. U0141 for other system.
Check if DTC U0141 is stored in occupant classification-ECU, combination meter, A/C-ECU, KOS-ECU or WCM, hands free module, CAN box unit, radio and CD player, satellite radio tuner.
Q: Is the DTC stored?
- YES: Replace the ETACS-ECU (Refer to ETACS-ECU ).
- NO: Go to Step 4.
- STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is stored in the SRS-ECU.
- Erase the DTC.
- Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
- Check if DTC is stored.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC stored?
- YES: Replace the SRS-ECU (Refer to SRS CONTROL UNIT (SRS-ECU) ).
- NO: There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS ).