Inspection Procedure 6: The Windshield Washer 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 washer motor, the column switch or the ETACS-ECU may be defective.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Check the operation of the windshield wipers.
Check that the windshield wipers work normally.

Q. Is the check result normal?
Go to Step 2.
Refer to Inspection Procedure 1 "The windshield wipers does not work at all ."

STEP 2. M.U.T.-III diagnosis code.
When the ignition switch is turned to the "LOCK" (OFF) position, check that the ETACS-ECU does not set the diagnosis code.

Q. Is the diagnosis code set?
Refer to GROUP 54A, Diagnosis Code Chart .
Go to Step 3.

STEP 3. M.U.T.-III data list
Check the input signals below which are related to the windshield washer.

  • Turn the windshield washer switch to the "ON" position.
Item No.
 Item name
 Normal condition
67
 Front washer output
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 4.
Refer to GROUP 54A, Inspection Procedure C-1 "The Column Switch (lighting and wiper switch) signal is not received ."

STEP 4. Connector check: A-29 washer motor connector


Q. Is the check result normal?

Go to Step 5.

Repair the connector.

STEP 5. Check the washer motor assembly.
Refer to .

Q. Is the check result normal?
Go to Step 6.
Replace the washer motor.

STEP 6. Resistance measurement at the A-29 washer motor connector.


(1)Disconnect the connector, and measure at the wiring harness side.

(2)Resistance between A-29 washer motor connector terminal No.2 and body earth
OK: Continuity (Less than 2 Ω)

Q. Is the check result normal?

Go to Step 8.

Go to Step 7.

STEP 7. Check the wiring harness between A-29 washer motor connector terminal No.2 and the body earth.



  • Check the earth wires for open circuit.

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 ).

Repair the wiring harness.

STEP 8. Connector check: C-218 ETACS-ECU connector


Q. Is the check result normal?

Go to Step 9.

Repair the connector.

STEP 9. Check the wiring harness from A-29 washer motor connector terminal No.1 to C-218 ETACS-ECU connector terminal No.9.






note Prior to the wiring harness inspection, check the junction block connector C-210 and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?

Go to Step 10.

Repair the wiring harness.

STEP 10. Retest the system.
The windshield washer should now work 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.