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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 264 (BODY CONTROL SYSTEMS - DIAGNOSTICS)CIRCUIT INSPECTIONKEY UNLOCK WARNING SWITCH CIRCUITINSPECTION PROCEDURE
2004 Toyota Celica GT, Standard

Inspection Procedure

2004 Toyota Celica GT, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: In case of using the TOYOTA hand-held tester, start the inspection from step  1 and in case of not using the TOYOTA hand-held tester, start from step  2.
  1. Check key unlock warning buckle switch using TOYOTA hand-held tester. 

    Preparation  connect the TOYOTA hand-held tester to the DLC 3.

    Check  the key unlock warning switch using DATA LIST.

    1. OK  : Proceed to next circuit inspection shown in problem symptoms. See PROBLEM SYMPTOMS .
    2. NG: Go to step  2  .
  2. Check key unlock warning switch  . See INSPECT KEY UNLOCK WARNING SWITCH CONTINUITY .
    1. NG  : Replace the key unlock warning switch.
    2. OK  : Go to step  3.
  3. Check wire harness and connector between key unlock warning switch and Body ECU  . See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS .
    1. NG  : Repair or replace wire harness or connector.
    2. OK  : Proceed to next circuit inspection shown in problem symptoms. See PROBLEM SYMPTOMS .
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.