Inspection Procedure B-3: The turn-signal indicator lamps do 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 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
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 B-1 "None of the turn-signal lamps 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
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. Check by M.U.T.-III "Special Function"
Using M.U.T.-III, select "Test" from the special function of the combination meter. Execute the following item to check the indicator.