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MB992006 FOG LAMP CHASSIS ELECTRICAL 54A-149 TROUBLESHOOTING STANDARD FLOW OF DIAGNOSTIC M1540401700142 Refer to GROUP 00 − Contents of troubleshooting . TROUBLE SYMPTOM CHART M1540401000239 Trouble symptom Inspection Reference page The front fog lamps do not illuminate normally. 1 One of the front fog lamps does not illuminate. 2 The front fog lamp indicator does not illuminate normally. 3 The rear fog lamp do not illuminate normally. 4 The rear fog lamp indicator does not illuminate normally. 5 SYMPTOM PROCEDURES Inspection Procedure 1: The front fog lamps do 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 CIRCUIT OPERATION If the front fog lamps do not illuminate normally, the • Tail lamp switch • Headlamp switch • Fog lamp switch • Option coding information COMMENTS ON TROUBLE SYMPTOM When the front fog lamps do not illuminate normally, PROBABLE CAUSES • Malfunction of column switch • Malfunction of the ETACS-ECU • Damaged harness wires and connectors MB992006 Extra fine probe Continuity check and voltage MB990784 MB990784 Ornament Removal of rear fog lamp assembly Tool Number Name Use |