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HEADLIGHT TSB Revision CHASSIS ELECTRICAL 54A-173 STEP 4. Using scan tool MB991958, check actuator test. check that the high-beam indicator light illuminates (Refer ). (3) Turn the ignition switch to the "LOCK" (OFF) position. YES : Replace the ETACS-ECU. Inspection Procedure 7: The headlight automatic shutdown 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 headlight automatic shutdown function does . TROUBLESHOOTING HINTS • Malfunction of front door switch (LH) • 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) |