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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 638 (ENGINE CONTROL SYSTEM (SFI) (1MZ-FE/3MZ-FE))ON-VEHICLE INSPECTION
2004 Toyota Matrix XR, FWD, Standard

On-Vehicle Inspection

2004 Toyota Matrix XR, FWD, StandardSECTION On-Vehicle Inspection
WARNING: This page is about a different car, the 2004 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK THROTTLE BODY 
    1. Listen to the throttle control motor operating sounds.
      1. Turn the ignition switch ON.
      2. When pressing the accelerator pedal position sensor lever, listen to the running motor. Make sure no friction noise comes from the motor.

      If friction noise exists, replace the throttle body.

    2. Inspect the throttle position sensor.
      1. Connect the hand-held tester or OBD II scan tool to the DLC3.
      2. Turn the ignition switch ON.
      3. Check that the MIL is off.
      4. Under CURRENT DATA, the throttle valve opening percentage (THROTTLE POS) should be within the standard value range below.

        Standard throttle valve opening percentage: 60% or more 

      If the percentage is less than 60%, replace the throttle body.

      NOTE: When checking the standard throttle valve opening percentage, the transmission should be in the neutral position.
  2. CHECK ACCELERATOR PEDAL POSITION SENSOR 
    1. Turn the ignition switch ON. Under CURRENT DATA, the voltage of the throttle position sensor should be within the standard value range below.

      Standard: 0.6 to 1.0 V 

      If the result is not as specified, replace the accelerator pedal position sensor.

  3. CHECK CAMSHAFT TIMING OIL CONTROL VALVE ASSY 
    1. Connect the hand-held tester or OBD II scan tool to the DLC3.
    2. Turn the ignition switch ON.
    3. Start the engine and warm it up.
    4. Select the VVT from the ACTIVE TEST menu.
    5. Check the engine speed when the OCV is operated by the hand-held tester.

      Standard: 

      CAMSHAFT TIMING OIL CONTROL VALVE ASSY SPECIFIED CONDITION

      Condition Specified Condition
      VVT system is OFF (OCV is OFF) Normal engine speed
      VVT system is ON (OCV is ON) Rough idle or engine stalled

      If the result is not as specified, replace the OCV assy.

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.