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MB992006 INTERIOR LAMP CHASSIS ELECTRICAL 54A-161 TROUBLESHOOTING STANDARD FLOW OF DIAGNOSTIC M1541301500166 Refer to GROUP 00 − Contents of troubleshooting . TROUBLE SYMPTOM CHART M1541300200515 Trouble symptom Inspection Reference page The front room lamp does not illuminate normally. 1 The rear room lamp does not illuminate normally. 2 The luggage compartment lamp does not illuminate normally. 3 The interior lamp automatic shutoff function does not work normally. 4 SYMPTOM PROCEDURES Inspection Procedure 1: The front room lamp does not illuminate normally. CAUTION • Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the − How to Register Key ID OPERATION The ETACS-ECU illuminates and extinguishes the • Ignition switch (IG1) • Key reminder switch • Door switches • Front door lock actuator (driver’s side) COMMENTS ON TROUBLE SYMPTOM If this does not work normally, the above switch input PROBABLE CAUSES • Malfunction of the key reminder switch • Malfunction of door switch • Malfunction of the front door lock actuator (driver’s side) • Malfunction of front room lamp • Malfunction of the ETACS-ECU • Damaged harness wires and connectors DIAGNOSIS PROCEDURE STEP 1. Rear room lamp operation check Q: Is the check result normal? YES : Go to Step 4. NO : Go to Step 2. MB992006 Extra fine probe Continuity check and voltage Tool Number Name Use |