Inspection Procedure 14: The Turn-signal Indicator Lamps do not Illuminate.

caution

Whenever the ECU is replaced, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

COMMENTS ON TROUBLE SYMPTOM

If the turn-signal lamp indicator 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 combination meter
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Turn-signal lamp check

Check that the turn-signal lamp flashes normally when the turn-signal switch is operated.

Q. Is the check result normal?

Go to Step 2.

Refer to Inspection Procedure 12 "The turn-signal lamps do not illuminate"

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

Check if diagnosis code is set to the ETACS-ECU.

Q. Is the diagnosis code set?

Troubleshoot the ETACS-ECU. Refer to

Go to Step 4.

STEP 4. M.U.T.-III actuator test

Perform the actuator test for the combination meter, and check that the turn-signal lamp indicator illuminates (Refer to Combination meter

Q. Is the check result normal?

Replace the ETACS-ECU.

Replace the combination meter.