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

DIAGNOSIS PROCEDURE

STEP 1. Check the A-05 windshield wiper motor connector

Q. Is the check result normal?

    Go to Step 2.
Repair the connector concerned.

STEP 2. Check the windshield wiper motor.
Check that the windshield wiper motor works normally. Refer to .

Q. Is the check result normal?
Go to Step 3.
Replace the windshield wiper motor.

STEP 3. Check the installation condition of the windshield wiper motor link plate.
Check if the windshield wiper motor link plate is installed into the wiper link assembly securely.

Q. Is the check result normal?
Go to Step 4
Repair the windshield wiper motor link plate installation. (Refer to .)

STEP 4. Measure the voltage at the A-05 windshield wiper motor connector.
(1)Disconnect the connector, and measure the voltage at the wiring harness side.
(2)Turn the ignition switch to the ACC position.
(3)Measure the voltage between A-05 windshield wiper motor connector terminal Nos.5 <LHD> or 4 <RHD> and body earth.
OK: Battery voltage

Q. Is the check result normal?
Go to Step 7.
Go to Step 5.

STEP 5. Check the C-304 ETACS-ECU connector

Q. Is the check result normal?
Go to Step 6.
Repair the connector concerned.

STEP 6. Check the wiring harness wires between C-304 ETACS-ECU connector terminal Nos. 8, 12 and A-05 windshield wiper motor connector terminal Nos. 5 <LHD> , 4 <RHD> or Nos. 3 <LHD>, 1 <RHD>.

  • Check the output lines for open or short circuit.

Q. Is the check result normal?
Go to Step 7.
Repair the wiring harness.

STEP 7. 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.