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When the column switch is in the AUTO position, this function automatically adjusts the wiping speed of windshield wiper by detecting the rain fall through lighting control sensor.
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The windshield wiper motor, the column switch, the lighting control sensor, the harness connector, or the ETACS-ECU may be defective.
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- Defective column switch (column-ECU)
- Malfunction of the lighting control sensor
- Defective windshield wiper motor
- Malfunction of ETACS-ECU
- Damaged wiring harness and connectors
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Visually check the presence of scratches or air bubbles (diameter of 5 mm or more) on the windshield to which the lighting control sensor is installed.
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Q.
Is the check result normal?
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Replace the windshield (Refer to GROUP 42 - Windshield Removal and Installation ).
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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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Refer to trouble symptom chart .
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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-ECU. Refer to GROUP 54A - ETACS .
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Check if a lighting control sensor diagnosis code is set.
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Q.
Is the diagnosis code set?
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Diagnose the lighting control sensor. (Refer to GROUP 54A - Diagnosis Code Chart .)
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Q.
Is the check result normal?
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Repair the damaged connector.
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(1)Disconnect the connector, and measure the resistance at the wiring harness.
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(2)Measure the resistance between D-131 lighting control sensor connector terminal No.2 and body earth. OK: Continuity exists (2 Ω or less)
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Q.
Is the check result normal?
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- Check the earth wires for open circuit.
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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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Repair the wiring harness.
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(1)Disconnect the connector, and measure the voltage at the wiring harness side.
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(2)Measure the voltage between D-131 lighting control sensor connector terminal No.1 and body earth. OK: Battery voltage
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Q.
Is the check result normal?
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- Check the power supply line for open circuit.
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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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Repair the wiring harness.
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Q.
Is the check result normal?
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Repair the damaged connector.
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(1)Disconnect the connector, and measure the voltage at the wiring harness side.
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(2)Measure the voltage between C-316 ETACS-ECU connector terminal No. 1 and body earth. OK: Battery voltage
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Q.
Is the check result normal?
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Replace the Lighting control sensor.
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- Check the input and output lines for open or short circuit.
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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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Repair the wiring harness.
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