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Back Door Key Lock & Unlock 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 back door key lock and unlock switch using DATA LIST. If back door key lock and unlock switch is faulty, go to next step. If back door key lock and unlock switch is okay, go to next test listed in appropriate SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING .
  2. Check back door key lock and unlock switch. See DOOR KEY LOCK & UNLOCK SWITCH  under COMPONENT TESTS. Replace switch as necessary. Retest system operation. If switch is okay, go to next step.
  3. Check circuits for faults between back door key lock and unlock switch and body control ECU. See WIRING DIAGRAMS . Repair or replace as necessary. If circuits are okay, go to next test listed in appropriate SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING .
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