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DIAGNOSIS TSB Revision WIRELESS CONTROL MODULE (WCM) 42C-23 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 (Vehicles with CAN communication system) STEP 1. Using scan tool MB991958, diagnose the CAN bus CAUTION To prevent damage to scan tool (MB991958), always turn YES : Go to Step 2. ). STEP 2. Register the VIN and recheck the diagnostic − How to Perform Vehicle Identification Number (VIN) Writing recheck if the DTC is set. the "ON" position. (2) Check if DTC is set. YES : Replace WCM and register the ID codes. (Refer to .) NO : The procedure is complete. ZC501967 AC404789 AC701411AB MB991824 MB991827 MB991910 Data link |