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Wiper/Washer Switch 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. Using scan tool, check wiper/washer switch using DATA LIST. If wiper/washer switch is faulty, go to next step. If wiper/washer switch is okay, go to next test listed in BODY NO. 3 CONTROL SYSTEM  table under TROUBLE SHOOTING .
  2. Check wiper/washer switch. See WIPER/WASHER SYSTEMS - LS430 article. Replace wiper/washer switch as necessary. Retest system operation. If wiper/washer switch is okay, go to next step.
  3. Check circuits for faults between wiper/washer switch and body control ECU. See WIRING DIAGRAMS . Repair or replace as necessary. If circuits are okay, go to next test listed in BODY NO. 3 CONTROL SYSTEM  table under TROUBLE SHOOTING .
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