Inspection Procedure 3: The windshield wipers do not stop at the specified park position.


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

COMMENTS ON TROUBLE SYMPTOM
The windshield wiper motor or the ETACS-ECU may be defective.

PROBABLE CAUSES

  • Defective windshield wiper motor
  • Malfunction of ETACS-ECU
  • Malfunctions of the wiring harness and connectors

DIAGNOSTIC PROCEDURE

STEP 1. Check the windshield wiper motor.
Check that the windshield wiper motor works normally. Refer to .

Q. Is the check result normal?
Go to Step 2.
Replace the windshield wiper motor.

STEP 2. Measure the voltage at windshield wiper motor connector.
(1)Disconnect the connector, and measure the voltage at the wiring harness side.
(2)Set the ignition switch to the ACC position.
(3)Measure the voltage between the windshield wiper motor connector (ACC terminal) and the body earth.
OK: System voltage

Q. Is the check result normal?
Go to Step 4.
Go to Step 3.

STEP 3. Check of open, short circuit in power supply line between windshield wiper motor connector and ignition switch (ACC).

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 connector(s) or wiring harness

STEP 4. Check of open, short circuit in W.AS, WACC line between windshield wiper motor connector and ETACS-ECU connector

Q. Is the check result normal?
Go to Step 5.
Repair the connector(s) or wiring harness

STEP 5. Retest the system.
Check that the windshield wipers stop at the specified park position.

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.