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STEP 2. Using scan tool MB991958, read the diagnostic 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 scan (2) Turn the ignition switch to the "ON" position. (3) Check whether the ETACS-ECU related DTC is set. (4) Turn the ignition switch to the "LOCK" (OFF) position. Q:Is the DTC set? YES: Diagnose the ETACS-ECU. Refer to GROUP 54Ad, P. NO: Go to Step 3. STEP 3. Check the power supply system ⦆ Hazard warning light Q:Is the check result normal? YES: Go to Step 4. NO: Refer to GROUP 54Ad, Malfunction of ETACS-ECU power STEP 4. Verify the central door locking system. Q:Does the central door locking system work normally? YES: Go to Step 5. NO: Refer to GROUP 42Ab, Trouble Symptom Chart P. STEP 5. Using scan tool MB991958, check data list. WIRELESS CONTROL MODULE (WCM) 42C-75 DIAGNOSIS |