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Wiper Motor Circuit

NOTE: If LEXUS scan tool is available, start test from step 1). If this scan tool is not available, start test from step 2).

  1. Check Wiper Motor Operation Using Scan Tool

    Using scan tool, operate wiper motor in ACTIVE TEST. If wiper motor does not operate, go to next step. If wiper motor operates, go to next test listed in appropriate TROUBLE SHOOTING SYMPTOMS table.

  2. Check Wiper Motor

    Check wiper motor. See WIPER MOTOR in WIPER/WASHER SYSTEMS article. If wiper motor is okay, go to next step. Replace wiper motor as necessary. Retest system operation.

  3. Check Circuits

    Check circuits for faults between wiper motor and body control ECU. See WIRING DIAGRAMS. Repair or replace as necessary. If circuits are okay, go to next test listed in appropriate TROUBLE SHOOTING SYMPTOMS table.
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