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HEADLIGHT TSB Revision CHASSIS ELECTRICAL 54A-201 STEP 2. Using scan tool MB991958, read the ETACS-ECU YES : Diagnose the ETACS-ECU. (Refer to ETACS, ) NO : Go to Step 3. STEP 3. Check the keyless entry system operation YES : Go to Step 4. GROUP 42B, Troubleshooting GROUP 42C, Troubleshooting STEP 4. Check the tail lights and headlights. YES : Go to Step 5. trouble symptom chart STEP 5. Retest the system. YES : The trouble can be an intermittent malfunction (Refer to GROUP 00 − How to use Troubleshooting/inspection Service Points − How to Cope with Intermittent Malfunction NO : Replace the ETACS-ECU. Inspection Procedure 14: The coming home light function does not work normally. CAUTION Whenever the ECU is replaced, ensure that the . TECHNICAL DESCRIPTION (COMMENT) When the coming home light function does not oper- . TROUBLESHOOTING HINTS • Malfunction of the keyless entry system • Malfunction of the ETACS-ECU |