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HEADLAMP AUTOMATIC LEVELLING SYSTEM CHASSIS ELECTRICAL 54A-129 TROUBLE SYMPTOM CHART M1540301200429 CAUTION Before or after the troubleshooting, check the operation of the headlamp automatic levelling system. . Trouble symptom Inspection Reference Malfunction of ETACS-ECU power supply circuit. − Refer to . The both headlamp automatic levelling systems (right and left) do not 1 One of the automatic levellings does not work. 2 SYMPTOM PROCEDURES Inspection Procedure 1: The both headlamp automatic levelling systems (right and left) do not work 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 If the both headlamp automatic levelling systems PROBABLE CAUSES • Malfunction of ETACS-ECU initialization • Malfunction of headlamp assembly (headlamp levelling unit) • Malfunction of front height sensor • Malfunction of rear height sensor • Malfunction of ETACS-ECU • Malfunction of CAN bus line DIAGNOSIS PROCEDURE STEP 1. M.U.T.-III CAN bus diagnostics Q: Is the check result normal? YES : Go to Step 2. NO : Repair the CAN bus line (Refer to GROUP − Troubleshooting ). STEP 2. M.U.T.-III other system diagnosis code Q: Is the diagnosis code set? YES : Troubleshoot the engine (Refer to GROUP 13A − Diagnosis Code Chart .) NO : Go to Step 3. STEP 3. M.U.T.-III diagnosis code Q: Is the diagnosis code set? YES : Perform the troubleshooting of the diagnosis code No. B2513. NO : Go to Step 4. STEP 4. Height sensor installation status check Q: Is the check result normal? YES : Go to Step 5. NO : Install the height sensor properly. |