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Passenger 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 for DTC B1224. If DTC B1224 is retrieved, go to next step. If DTC B1224 is not retrieved, go to next test listed in appropriate SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING .
  2. Check passenger 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 passenger door key lock and unlock switch and passenger door 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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