Inspection Procedure 3: The windshield wipers do not stop at the specified position.
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Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
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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
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STEP 1. Check the windshield wiper motor.
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Check that the windshield wiper motor works normally. Refer to .
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Q.
Is the check result normal?
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Go to Step 2.
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Replace the windshield wiper motor.
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STEP 2. Measure the voltage at windshield wiper motor connector.
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(1)Disconnect the connector, and measure the voltage at the wiring harness side.
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(2)Set the ignition switch to the ACC position.
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(3)Measure the voltage between the windshield wiper motor connector (ACC terminal) and the body earth. OK: System voltage
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Q.
Is the check result normal?
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Go to Step 4.
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Go to Step 3.
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STEP 3. Check of open, short circuit in power supply line between windshield wiper motor connector and ignition switch (ACC).
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Q.
Is the check result normal?
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The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points -
How to Cope with Intermittent Malfunction ).
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Repair the connector(s) or wiring harness
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STEP 4. Check of open, short circuit in F/WIP-AS, FR WIP ACC line between windshield wiper motor connector and ETACS-ECU connector
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Q.
Is the check result normal?
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Go to Step 5.
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Repair the connector(s) or wiring harness
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Check that the windshield wipers stop at the specified park position.
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Q.
Is the check result normal?
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Intermittent malfunction. Refer to GROUP 00 -
How to Use Troubleshooting/Inspection Service Points, -
How to Cope with Intermittent Malfunctions .)
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Replace the ETACS-ECU (Refer to GROUP 54A -
ETACS, ETACS-ECU ).
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