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Home >> Lexus >> 1999 >> GS 400 >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Systems >> Circuit Tests >> Passenger Door Courtesy Light & Courtesy Switch Circuit

Passenger Door Courtesy Light & Courtesy Switch Circuit

  1. Open and close passenger door while observing passenger door courtesy light operation. If passenger door courtesy light does not illuminate when door is opened and go out when door is closed, go to next step. If passenger door courtesy light operates as specified, go to next test listed in appropriate SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING .
  2. Check passenger door courtesy light. See DOOR COURTESY LIGHT  under COMPONENT TESTS. Replace passenger door courtesy light as necessary. Retest system operation. If passenger door courtesy light is okay, go to next step.
  3. Check passenger door courtesy switch. See DOOR COURTESY SWITCH  under COMPONENT TESTS. Replace passenger door courtesy switch as necessary. Retest system operation. If passenger door courtesy switch is okay, go to next step.
  4. Check circuits for faults between passenger door courtesy light, passenger door courtesy 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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