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HEADLAMP CHASSIS ELECTRICAL 54A-109 Inspection Procedure 14: The coming home light function does not work 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 COMMENTS ON TROUBLE SYMPTOM When the coming home light function does not oper- PROBABLE CAUSES • Malfunction of the keyless entry system • Malfunction of the ETACS-ECU DIAGNOSIS PROCEDURE STEP 1. ETACS-ECU customise function check. • 15 sec • 30 sec • 60 sec • 180 sec Q: Is it set to other than "Disabled"? YES : Go to Step 2. NO : Set "Coming home light" to any one other ). STEP 2. M.U.T.-III diagnosis code Q: Is the diagnosis code set? YES : Troubleshoot the ETACS-ECU. Refer to . NO : Go to Step 3. STEP 3. M.U.T.-III data list • Turn the ignition switch to the LOCK (OFF) posi- tion. Item No. Item name Normal Item 254 IG voltage 1 V or less OK: Normal condition is displayed. Q: Is the check result normal? YES : Go to Step 4. NO : Troubleshoot the ETACS-ECU. Refer to STEP 4. Check the headlamps. Q: Is the check result normal? YES : Go to Step 5. NO : Troubleshoot the headlamps. Refer to STEP 5. Retest the system. Q: Is the check result normal? YES : The trouble can be an intermittent malfunction (Refer to GROUP 00 − How to use Troubleshooting/inspection Service − How to Cope with Intermittent Malfunction ). NO : Replace the ETACS-ECU. DATA LIST REFERENCE TABLE M1540103800508 Item No. M.U.T.-III display Condition Normal condition 7001 RLS IG1 When the ignition switch is turned to the OFF When the ignition switch is turned to the ON |