INSPECTION PROCEDURE 7: The windshield washer does not work.










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


COMMENTS ON TROUBLE SYMPTOM


The windshield washer motor, the column switch or the ETACS-ECU may be defective.

PROBABLE CAUSES



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

DIAGNOSTIC PROCEDURE


STEP 1. Check the operation of the windshield wipers.


Check that the windshield wipers work.

Q. Is the check result normal?

Go to Step 2.
Refer to Inspection Procedure 1 "Windshield wipers do not work at all ."

STEP 2. 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 3.

STEP 3. Connector check: A-52 Washer motor connector


Q. Is the check result normal?

Go to Step 4.
Repair the defective connector.

STEP 4. Check the washer motor.


Check that the windshield washer motor works normally (Refer to ).

Q. Is the check result normal?

Go to Step 5.
Replace the washer motor.

STEP 5. Check the operation of the rear washer.


Check that the rear washer works.

Q. Is the check result normal?

Replace the ETACS-ECU.
Go to Step 6.

STEP 6. M.U.T.-III data list


Check the input signal related to the windshield washer operation.

  • Ignition switch: ACC
  • Windshield washer switch: ON
Item No.
Item name
Normal conditions
Item 237
Front washer
ON
OK: Normal condition is displayed.

Q. Is the check result normal?

Go to Step 7.
Refer to GROUP 54A - ETACS, Inspection Procedure 12 "The column switch signal is not received ."

STEP 7. Check the C-304 ETACS-ECU connector


Q. Is the check result normal?

Go to Step 8.
Repair the connector concerned.

STEP 8. Check the wiring harness between A-52 windshield washer motor connector terminal No. 2 and C-304 ETACS-ECU connector terminal No. 13.



  • Check the input line for open or short circuit.

Q. Is the check result normal?

Go to Step 9.
Repair the wiring harness.

STEP 9. Check the wiring harness between A-52windshield washer motor connector terminal No. 1 and C-304 ETACS-ECU connector terminal No. 14.



  • Check the input line for open or short circuit.

Q. Is the check result normal?

Go to Step 10.
Repair the wiring harness.

STEP 10. Retest the system.


Check that the windshield washers work normally.

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.