Inspection procedure B-6: 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.

Electric motor switch (ON)
Turn-signal lamp switch
Hazard warning lamp switch

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

PROBABLE CAUSES

Malfunction of the column switch
Malfunction of the hazard warning lamp switch
Malfunction of the ETACS-ECU
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

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

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

Q. Is the diagnosis code set?

Refer to diagnosis code chart

Go to Step 2

STEP 2. 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 3

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

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 and register the ID codes (Refer to

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