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. Check of adjustment details for the turn-signal lamp operation sound function


Check that the turn-signal lamp operation sound function is set to "Operation" using the customisation function of M.U.T-III.

Q. Is the check result normal?

Go to Step 2.

Using the customisation function of M.U.T-III, set the turn-signal lamp operation sound function to "Operation."

STEP 2. 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 3.

STEP 3. Hazard warning lamps illumination check


When the hazard warning lamp switch is operated, check that the hazard warning lamps flash.

Q. Is the check result normal?

Go to Step 4.

Refer to Inspection Procedure 1 "The hazard warning lamps do not illuminate ."

STEP 4. 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.