Inspection Procedure B-2: Turn-signal lamp operation sound function does not work normally.


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.


COMMENTS ON TROUBLE SYMPTOM


The ETACS-ECU operates this function in accordance with the input signals below.

If this function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III diagnosis code.


Check that ETACS-ECU sets a diagnosis code.

Q. Is the diagnosis code set?

Refer to diagnosis code chart .

Go to Step 2.

STEP 2. Turn-signal lamp illumination check


When the turn-signal lamp switch or the hazard warning lamp switch is operated, check that the turn-signal lamps flash.

Q. Is the check result normal?

Go to Step 3.

First, repair the turn-signal lamp(s) (Refer to Trouble Symptom Chart ).

STEP 3. Retest the system.


Check that the turn-signal lamp operation sound function works normally.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the ETACS-ECU. Then perform the variant coding and write the VIN data (Refer to GROUP 00, Precautions Before Service - How to Perform Variant Coding ).