INSPECTION PROCEDURE 5: The windshield intermittent wiper interval cannot be adjusted by operating the windshield intermittent wiper volume control.





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


COMMENTS ON TROUBLE SYMPTOM


The column switch or the ETACS-ECU may be defective.

PROBABLE CAUSES



  • Defective column switch
  • Malfunction of ETACS-ECU
  • Malfunctions of the wiring harness and connectors

DIAGNOSTIC PROCEDURE


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


Check if an ETACS-related diagnosis code is set.

Q. Is the diagnosis code set?

Troubleshoot the ETACS. Refer to .
Go to Step 2.

STEP 2. Check the ETACS customisation function.


Use the ETACS customisation function to check that "Front wiper operation" is set to "variable INT" or "vehicle speed dependent".

Q. Is the check result normal?

Go to Step 3.
Use the ETACS customisation function to set "Front wiper operation" to "variable INT" or "vehicle speed dependent". Refer to .

STEP 3. Retest the system.


Check that the windshield wiper interval changes when the windshield wiper volume control is rotated.

Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.