Inspection Procedure 5: 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

Malfunction of the CAN bus line
Malfunction of the combination meter
Malfunction of the ETACS-ECU
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 Combination Meter - Troubleshooting

Q. Is the check result normal?

Replace the ETACS-ECU.

Replace the combination meter.