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 ).