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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. 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 SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING .
  2. Using an ohmmeter, check continuity of bulb in question. Replace light as necessary and retest system operation. If light is okay, go to next step.
  3. 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 SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING .
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