Inspection Procedure 9: The Wiper-linked Auto Lamp Function does not Work Normally.


caution Whenever the ECU is replaced, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

OPERATION


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

COMMENTS ON TROUBLE SYMPTOM


If this function does not work normally, the above switch input circuit(s) or ETACS-ECU may have a problem.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. ETACS-ECU customise function check


Use the ETACS-ECU customise function to check that the "Auto light linked wiper" is set to "Enable."

Q. Is the check result normal?

Go to Step 2.

Use the SWS monitor customise function to set the "Auto light linked wiper" to "Enable" (Refer to ).

STEP 2. Windshield wipers operation check


Check that the windshield wipers work normally by operating the relevant switches.

Q. Is the check result normal?

Go to Step 3.

Troubleshoot the windshield wiper (Refer to GROUP 51 - Windshield wiper and washer - Troubleshooting ).

STEP 3. Check the auto lamp function operation.


Check that the auto lamp function works normally.

Q. Is the check result normal?

Go to Step 4.

Refer to Inspection Procedure 8 "The auto lamp function does not work normally" .

STEP 4. Retest the system


Check that the wiper-linked auto-lamp 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.