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Home >> Toyota >> 1998 >> Avalon XLS >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Anti-Theft System >> System Tests >> Test No. 8

Test No. 8

  1. Check Key Unlock Warning Switch

    Disconnect electrical connector for key unlock warning switch. Key unlock warning switch is located near ignition switch and contains a 2-pin electrical connector. See Figure.
  2. Connect ohmmeter between electrical terminals on key unlock warning switch. Check that no continuity exists with ignition key removed from ignition lock cylinder. Check that continuity exists with ignition key installed in ignition lock cylinder.
  3. If key unlock warning switch operates properly, go to next step. If key unlock warning switch is defective, replace key unlock warning switch.

  4. Check Key Unlock Warning Switch Wiring

    Check for defective connectors and Red/Yellow wire between anti-theft system Electronic Control Unit (ECU) and key unlock warning switch, and on White/Black wire between body ground and key unlock warning switch. See WIRING DIAGRAMS . Anti-theft system ECU is located near passenger's side of instrument panel, behind glove box, just above kick panel and uses a 12-pin electrical connector and a 22-pin electrical connector. See Figure. If connectors and wiring are okay, go to next step. If connectors or wiring are defective, repair as necessary.

  5. Replace Anti-Theft System ECU

    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  table under TROUBLE SHOOTING.
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