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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 367 (ENGINE CONTROL SYSTEM)SFI SYSTEM (3MZ-FE)ON-VEHICLE INSPECTION
2004 Toyota Celica GT, Standard

On-Vehicle Inspection

2004 Toyota Celica GT, StandardSECTION On-Vehicle Inspection
WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY 
    1. Check the operation.
      1. Connect the hand-held tester to the DLC3.
      2. Turn the ignition switch ON.
      3. Start the engine and allow it to warm up.
      4. Connect the hand-held tester, then select VVT from the ACTIVE TEST menu.
      5. Check the engine speed when the OCV is operated with the hand-held tester.

        Standard: 

        Fig 1: Connecting Hand-Held Tester To DLC3
        G00919737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the operation is not as specified, inspect the camshaft timing oil control valve (see INSPECTION ).

      Fig 2: Tester Operation Specified Conditions Table
      G00919738Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT THROTTLE BODY ASSY 
    1. Check the operation (throttle control motor).
      1. Turn the ignition switch ON.
      2. When turning the accelerator pedal position sensor lever, check the running sound of the motor. Also, check that there is no friction sound.

        If the operation is not as specified, inspect the throttle body (see INSPECTION ).

    2. Check the operation (throttle position sensor).
      1. Connect the hand-held tester to the DLC3.
      2. Turn the ignition switch ON.
      3. Check that the check engine warning light does not light up.
      4. Check that the throttle valve opening percentage (THROTTLE POS) of CURRENT DATA shows the standard value.

        Standard throttle valve opening percentage: 60 % or more 

      NOTE: When checking the standard throttle valve opening percentage, the transmission is in the neutral position.
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.