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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 265 (DRIVER DOOR CONTROL SYSTEM - DIAGNOSTICS)CIRCUIT INSPECTIONDOOR KEY LOCK AND UNLOCK 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.
  1. Check the door key lock and unlock switch using DTC check  . See MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSTICS .
    1. OK  : Proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS TABLES .
    2. NG  , go to  2.
  2. Check the door key lock and unlock switch  . See INSPECT DRIVER DOOR KEY LOCK AND UNLOCK SWITCH .
    1. NG  : Replace the door lock motor.
    2. OK  , go to step  3.
  3. Check wire harness and connector between door key lock and unlock switch and driver door ECU. 
    1. NG  : Repair or replace wire harness or connector.
    2. OK  : Proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS TABLE .
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.