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 lamp does not illuminate normally, the harness in the CAN bus
lines, connector(s), ETACS-ECU, or combination meter may have a problem.
PROBABLE CAUSES
Malfunction of the ETACS-ECU
Malfunction of the combination meter
Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Check the headlamp.
Check that the headlamps illuminate and go out normally when the lighting switch is operated.
Q.
Is the check result normal?
Go to Step 2.
Repair the headlamps. Refer to .
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 54C -
Troubleshooting ).
STEP 3. M.U.T.-III diagnosis code.
When the ignition switch is turned to the "LOCK" (OFF) position, check that the ETACS-ECU
does not set the diagnosis code.
Q.
Is the diagnosis code set?
Refer to diagnosis code chart .
Go to Step 4.
STEP 4. M.U.T.-III actuator test for other system
Perform the actuator test for the combination meter, and check that the high-beam indictor
lamp illuminate. Refer to .