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Illumination 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 Interior Light Operation Using Scan Tool

    Using scan tool, operate interior lights in ACTIVE TEST. If interior lights do not operate properly, go to next step. If interior lights operate properly, go to next test listed in appropriate TROUBLE SHOOTING SYMPTOMS table.

  2. Check Light

    Using an ohmmeter, check continuity of bulb in question. If light is okay, go to next step. Replace light as necessary and retest system operation.

  3. Check Circuits

    Check circuits for faults between interior lights, body control ECU and battery. 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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