Inspection Procedure
10: The windshield washer does not work.
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Whenever ECU is
replaced, ensure that the input and output signal circuits are normal.
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COMMENTS ON TROUBLE SYMPTOM
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The windshield washer motor, the column switch or the ETACS-ECU may be defective.
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- Defective windshield washer motor
- Defective column switch
- Malfunction of ETACS-ECU
- Malfunctions of the wiring harness and connectors
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STEP 1. Check the operation of the windshield wipers.
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Check that the windshield wipers work normally.
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Q.
Is the check result normal?
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 Go to Step 2.
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 Refer to Inspection Procedure 1 "Windshield wipers do not work at all  ."
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STEP 2. M.U.T.-III diagnosis code
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Check if an ETACS-related diagnosis code is set.
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Q.
Is the diagnosis code set?
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Troubleshoot the ETACS. Refer to GROUP 54A -
ETACS .
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Go to Step 3.
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STEP 3. M.U.T.-III data list
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Check the input signal related to the windshield washer operation.
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- Ignition switch: ACC
- Windshield washer switch: ON
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Item No.
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Item name
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Normal condition
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Item 237
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Front washer
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ON
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OK: Normal condition is displayed.
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Q.
Is the check result normal?
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Go to Step 4.
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Refer to GROUP 54A -
ETACS, Inspection Procedure 11 "The column switch
signal is not received ."
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STEP 4. Check the washer motor.
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Check that the windshield washer motor works normally (Refer to ).
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Q.
Is the check result normal?
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Go to Step 5.
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Replace the washer motor.
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STEP 5. Measure the voltage at ETACS-ECU connector (W.WA terminal).
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(1)Disconnect the connector, and measure the voltage at the wiring harness-side.
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(3)Windshield washer switch: ON
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(4)Measure the voltage between C-304 ETACS-ECU connector (W.WA terminal) and body
earth.
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 8.
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Go to Step 6.
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STEP 6. Check of open, short to power supply, short to earth circuit
in WASH line between washer motor connector and ETACS-ECU connector.
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Q.
Is the check result normal?
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Go to Step 7.
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Repair the wiring harness.
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STEP 7. Check of open, short to power supply, short to earth circuit
in W.WA line between washer motor connector and ETACS-ECU connector.
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Q.
Is the check result normal?
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Go to Step 8.
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Repair the wiring harness.
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STEP 8. Retest the system.
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Check that the windshield washers work normally.
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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 Malfunction ).
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Replace the ETACS-ECU.
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