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Driver 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. Check For DTC B1222

    Using scan tool, check for DTC B1222. If DTC B1222 is retrieved, go to next step. If DTC B1222 is not retrieved, go to next test listed in appropriate TROUBLE SHOOTING SYMPTOMS table.

  2. Check Driver Door Key Lock & Unlock Switch

    Check driver door key lock and unlock switch. See POWER DOOR LOCKS, TRUNK LID & FUEL DOOR article. If switch is okay, go to next step. Replace switch as necessary. Retest system operation.

  3. Check Circuits

    Check circuits for faults between driver door key lock and unlock switch and driver door 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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