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RADIO AND CD PLAYER TSB Revision CHASSIS ELECTRICAL 54A-365 OPERATION When the ignition switch is in the ON or ACC posi- . COMMENTS ON TROUBLE SYMPTOM Provided that the audio diagnostic trouble code is not . PROBABLE CAUSES • Malfunctions of radio and CD player • Malfunction of the ETACS-ECU • Option coding information inconsistency • Damaged harness wires and connectors DIAGNOSIS Required Special Tools: • MB991223: Harness Set • MB992006: Extra Fine Probe • 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 STEP 1. ETACS-ECU coding data check. option coding information. (Refer to GROUP 00, Coding List (2) Check that the "AUDIO" is set to "Present." YES : Go to Step 2. "AUDIO" to "Present," and check the trouble STEP 2. Using scan tool MB991958, read the ETACS-ECU YES : Troubleshoot the ETACS-ECU (Refer to GROUP 54A, ETACS, Diagnosis ), and then go to Step 3. NO : Go to Step 3. ZC501967 AC404789 AC702802 MB991824 MB991827 MB991910 Data link connector AB |