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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 471 (ENGINE CONTROLS - DIAGNOSTICS)CIRCUIT INSPECTIONDTC P2111: THROTTLE ACTUATOR CONTROL SYSTEM - STUCK OPEN, DTC P2112: THROTTLE ACTUATOR CONTROL SYSTEM - STUCK CLOSEDINSPECTION PROCEDURE
2004 Toyota Matrix XR, FWD, Standard

Inspection Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2004 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

  1. Is there DTC P2111 or P2112 being output. 
    1. NG : Go to relevant DTC chart (see  DIAGNOSTIC TROUBLE CODE CHART  ).  
    2. OK : Go to next step. 
  2. Visually check throttle valve. 

    PREPARATION: 

    Remove the intake air duct.

    CHECK: 

    Check for contamination between the throttle valve and the housing. If necessary, clean the throttle body. And check that the throttle valve moves smoothly.

    OK: 

    The throttle valve is not contaminated with foreign objects and can move smoothly 

    1. NG : Replace throttle body. 
    2. OK : Go to next step. 
  3. Check DTC output. 

    PREPARATION: 

    1. Start the engine, and depress and release the accelerator pedal quickly (fully open and fully close).
    2. Clear the DTC.

    CHECK: 

    Read the DTC.

    RESULT: 

    DTC CHECK

    Display (DTC output) Proceed to
    No DTC A
    P2111 and/or P2112 B
    1. B : Replace ECM (see  COMPONENTS  ).  
    2. A : Check for intermittent problems (see  PRE-CHECK  ).  
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.