Inspection Procedure
3: The windshield wipers do not stop at the specified position.
caution
Whenever the 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
Malfunction of the windshield wiper motor
The ETACS-ECU may be defective
Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Connector check: A-02 windshield wiper motor connector
Q.
Is the check result normal?
Go to step 2.
Repair the damaged connector.
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. Measure the voltage at A-02 windshield wiper motor connector.
(1)Disconnect the connector, and measure the voltage at the wiring harness side.
(2)Set the electric motor switch to the ACC position.
(3)Measure the voltage between the A-02 windshield wiper motor connector terminal
No. 6 and the body earth. OK: Battery voltage
Q.
Is the check result normal?
Go to step 5.
Go to step 4.
STEP 4. Check the wiring harness between A-02 windshield wiper motor
connector terminal No.4 and ignition switch (ACC).
note
Prior to the wiring harness inspection, check the junction block connectors B-302, B-306
and repair if necessary.
Check the power supply line to ignition switch (ACC) 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 5. Check B-304 ETACS-ECU connector.
Q.
Is the check result normal?
Go to step 6.
Repair the damaged connector.
STEP 6. Check the wiring harness between B-304 ETACS-ECU connector
terminal No. 6, 10 and A-02 windshield wiper motor connector terminal No. 3, 4.
note
Before the wiring harness check, check the B-306 junction block connector, and repair
if necessary.
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. System retest
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 Malfunctions .)
)
)
)
)
)
Go to step 2.
Repair the damaged connector.
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