Inspection Procedure C-5: The intermittent wiper interval is not changed according to the vehicle speed.


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


COMMENTS ON TROUBLE SYMPTOM


The ETACS-ECU calculates the intermittent wiper interval according to the vehicle speed signal which is sent by the combination meter.
If the intermittent wiper interval does not depend on the vehicle speed, the input circuit of the vehicle speed signal and the ETACS-ECU may be defective. Alternatively, there are cases where the intermittent wiper interval does not depend on the vehicle speed because of the setting by the customise function.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Retest the system.


Check that the windshield intermittent wiper interval can be adjusted by operating the windshield intermittent wiper volume control.

Q. Is the check result normal?

Go to Step 2.

Refer to Inspection Procedure C-4 " The intermittent wiper interval cannot be adjusted by operating the windshield intermittent wiper volume control ."

STEP 2. Check the customise function.


Check that the intermittent wiper interval does not depend on the vehicle speed.

Q. Is the check result normal?

Using the customise function, make a setting so that the intermittent wiper interval will depend on the vehicle speed. Refer to .

Go to Step 3.

STEP 3. 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 4.

STEP 4. Retest the system.


Check that the intermittent wiper interval depends on the vehicle speed.

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 ).