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Test No. 16: Power Window Switch Circuit

  1. Check appropriate power window switch. See POWER WINDOWS - IS300 article. Replace switch as necessary. If power window switch is okay, go to next step.
  2. Check circuits for faults between power window switch and body ECU. See WIRING DIAGRAMS . Repair or replace as necessary. If circuits are okay, see SYMPTOM INDEX (DOOR LOCK CONTROL SYSTEM)  table and perform appropriate test.
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