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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 STEP 1. Using scan tool MB991958, diagnose the CAN bus ZC501967 AC404789 ZC5019680000 MB991824 MB991827 MB991910 Data link connector To prevent damage to scan tool (MB991958), always turn (1) Connect scan tool MB991958 to the data link connector. (2) Turn the ignition switch to the "ON" position. (3) Diagnose the CAN bus line. (4) 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 GROUP 54D, STEP 2. Register the encrypted code and recheck the (1) Turn the ignition switch from the "LOCK" (OFF) position to (2) Check if the DTC is set. Q:Is the DTC set? YES: Go to Step 3. NO: The procedure is complete. STEP 3. Replace the ignition key and recheck the diagnostic (1) Turn the ignition switch from the "LOCK" (OFF) position to (2) Check if the DTC is set. WIRELESS CONTROL MODULE (WCM) 42C-19 DIAGNOSIS |