Inspection Procedure 12: The Turn-signal Indicator Lamps 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 turn-signal indicator lamps 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 that the hazard warning lamps operate.
Check that the hazard warning lamps illuminate normally.

Q. Is the headlamps in good condition?
Go to Step 2.
Refer to Inspection Procedure 1 "The hazard warning lamps 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 turn-signal indicator illuminates (Refer to ).

Q. Is the check result normal?
Replace the ETACS-ECU.
Replace the combination meter.