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HEADLIGHT TSB Revision CHASSIS ELECTRICAL 54A-193 Inspection Procedure 10: The auto light function does not work normally. CAUTION Whenever the ECU is replaced, ensure that the . OPERATION The ETACS-ECU operates this function in accor- . TECHNICAL DESCRIPTION (COMMENT) If the auto light function does not work normally, the . TROUBLESHOOTING HINTS • Malfunction of the lighting control sensor • Malfunction of the column switch • Malfunction of the ETACS-ECU • The wiring harness or connectors may have loose, corroded, or damaged terminals, or termi- 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 the Scan Tool (M.U.T.-III) ." (2) Turn the ignition switch to the "ON" position. YES : Go to Step 2. ). AC608435 Data link connector MB991827 MB991824 MB991910 AB |