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ZC501967 AC404789 ZC5019680000 MB991824 MB991827 MB991910 Data link connector To prevent damage to scan tool MB991958, always turn the (1) Connect scan tool MB991958. Refer to "How to connect the (2) Turn the ignition switch from "LOCK" (OFF) position to "ON" (3) Check if DTC is set. (4) Turn the ignition switch to the "LOCK" (OFF) position. Q:Is the DTC set? YES: Go to Step 2. NO: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection STEP 2. Using scan tool MB991958, diagnose the CAN bus (1) Turn the ignition switch to the "ON" position. (2) Diagnose the CAN bus line. (3) Turn the ignition switch to the "LOCK" (OFF) position. Q:Is the CAN bus line found to be normal? YES: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/ NO: Repair the CAN bus line. (Refer to GROUP 54D, DTC U0141: ETACS-ECU CAN timeout M14209200025USA0000010000 ⦆ If the DTC U0141 is set, be sure to diagnose the ⦆ When replacing the ECU, always check that the DIAGNOSTIC FUNCTION TROUBLESHOOTING HINTS ⦆ Malfunction of CAN bus line ⦆ Malfunction of WCM ⦆ Malfunction of ETACS-ECU DIAGNOSIS Required Special Tools: ⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly) WIRELESS CONTROL MODULE (WCM) 42C-47 DIAGNOSIS |