Inspection Procedure 8: The High-beam Indicator Lamp does not Illuminate.



caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.




COMMENTS ON TROUBLE SYMPTOM


If the high beam indicator does not illuminate normally, connector(s), wiring harness in the CAN bus lines, the ETACS-ECU or the combination meter may be defective.

PROBABLE CAUSES



  • The CAN bus line is defective.
  • The combination meter may be defective
  • The ETACS-ECU may be defective
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE



STEP 1. Check the headlamps.


When the lighting switch is operated, check that the headlamps illuminate/go off normally.

Q. Is the headlamps in good condition?

Go to Step 2.
Refer to Inspection Procedure 2 "The high-beam headlamps do not illuminate normally ."

STEP 2. M.U.T.-III CAN bus diagnostics


Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 3.
Repair the CAN bus line (Refer to GROUP 54D - Troubleshooting ).

STEP 3. M.U.T.-III actuator test


Perform the actuator test for the combination meter, and check that the high-beam indicator illuminates (Refer to ).

Q. Is the check result normal?

Replace the ETACS-ECU.
Replace the combination meter.