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Home >> Lexus >> 1998 >> LX 470 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Anti-Theft System >> System Tests >> Test No. 12

Test No. 12

  1. Check Open Door Warning Light Operation

    Check that open door warning light on instrument panel comes on anytime any door is opened and goes off when all doors are closed.
  2. If open door warning light operates properly, go to next step. If open door warning light does not operate properly, check door courtesy switch. See DOOR COURTESY SWITCH  under COMPONENT TESTS and REAR (LUGGAGE COMPARTMENT) DOOR COURTESY SWITCH  under COMPONENT TESTS. If door courtesy switch is defective, replace components as necessary. If door courtesy switch is okay, check wiring circuit and connectors for open door warning light. See ILLUMINATION/INTERIOR LIGHTS article.

  3. Check Door Courtesy Switch Wiring

    Check for defective connectors and appropriate wire between door courtesy switch and anti-theft system Electronic Control Unit (ECU). See WIRING DIAGRAMS . Anti-theft system ECU is located near passenger's side of instrument panel, behind glove box and uses a 12-pin electrical connector and a 22-pin electrical connector. See Figure.
  4. If connectors and wiring are okay, replace anti-theft system ECU. See ANTI-THEFT SYSTEM ECU  under REMOVAL & INSTALLATION. Check system operation. If anti-theft system still cannot be set, go to next test listed. See TROUBLE SHOOTING SYMPTOMS  under TROUBLE SHOOTING. If connectors or wiring are defective, repair as necessary.
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