Inspection Procedure
7: The windshield washer does not work normally.
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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 washer motor, the column switch or ETACS-ECU may be defective.
PROBABLE CAUSES
- Defective windshield washer motor
- Malfunction of the column switch
- The ETACS-ECU may be defective
- Damaged harness wires 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.
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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."? Refer
to  .
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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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Diagnose the ETACS. (Refer to GROUP 54A - ETACS, Trouble Symptom Chart ).
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Go to Step 3.
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STEP 3. 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 4.
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Replace the washer motor.
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STEP 4. 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 conditions
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Item 67
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Front washer output
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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 5.
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Refer to GROUP 54A - ETACS, Inspection Procedure 9 "The column switch
signal is not received."? Refer to .
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STEP 5. Measure the voltage at the ETACS-ECU (F/WIP-WASH).
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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 ETACS-ECU (F/ WIP-WASH) 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 circuit in F/WIP WASH line between windshield
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 connector(s) or wiring harness.
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STEP 7. Check of open, short circuit in R/WIP WASH line between windshield
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 connector(s) or wiring harness.
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STEP 8. Check the trouble symptom.
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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 Malfunctions .)
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Replace the ETACS-ECU.
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