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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 405 (COMBINATION METER SYSTEM - DIAGNOSIS)CIRCUIT INSPECTIONIGNITER SIGNAL CIRCUITINSPECTION PROCEDUREWHEN USING LEXUS HAND-HELD TESTER
2004 Toyota Celica GT, Standard

When using LEXUS hand-held tester

2004 Toyota Celica GT, StandardSECTION When using LEXUS hand-held tester
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check tachometer value. 

    PREPARATION: 

    Connect the LEXUS hand-held tester to the DLC3.

    CHECK: 

    1. Enter DATA LIST function of the LEXUS hand-held tester.
    2. When driving the vehicle, check that parameter value of "Tachometer" changes on the screen of the LEXUS hand-held tester.
    1. OK : Replace combination meter (See  REMOVAL  ). 
    2. NG : Go to next step. 
  2. Check wire harness and connector between combination meter and ECM (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. NG : Repair or replace wire harness or connector. 
    2. OK : Check and repair ignition coil and wire harness. 
RENDER: 1.0x

NO RELATED

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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.