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СИСТЕМА SFI, Diagnostic DTC:P2111, P2112

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DTC Code DTC Name
P2111 Throttle Actuator Control System - Stuck Open
P2112 Throttle Actuator Control System - Stuck Closed
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DESCRIPTION

The throttle actuator is operated by the ECM and opens and closes the throttle valve using gears. The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body. The throttle position sensor provides feedback to the ECM so that the ECM can control the throttle actuator (throttle valve) appropriately in response to driver inputs.

Tip:

This ETCS (Electronic Throttle Control System) does not use a throttle cable.

DTC No. DTC Detection Condition Trouble Area
P2111 Throttle actuator does not close even when the ECM commands it to close (1 trip detection logic).

  • Throttle actuator

  • Throttle valve

  • Throttle body assembly

  • Wire harness or connector
P2112 Throttle actuator does not open even when the ECM commands it to open (1 trip detection logic).

  • Throttle actuator

  • Throttle valve

  • Throttle body assembly

  • Wire harness or connector
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MONITOR DESCRIPTION

The ECM determines that there is a malfunction in the ETCS when the throttle valve remains at a fixed angle despite a high drive current from the ECM. The ECM illuminates the MIL and stores a DTC.

If the malfunction is not repaired successfully, a DTC is stored when the accelerator pedal is fully depressed and released quickly (to fully open and close the throttle valve) after the engine is next started.

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MONITOR STRATEGY

Required Sensors/Components Throttle actuator
Frequency of Operation Continuous
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TYPICAL ENABLING CONDITIONS

Table 1. All
Throttle actuator ON
Throttle actuator duty calculation Executing
Throttle position sensor failure Not detected
Throttle actuator current-cut operation Not executing
Throttle actuator power supply 4 V or higher
Throttle actuator failure Not detected
Table 2. P2111 (Throttle Actuator Stuck Open)
All of following conditions met -
Throttle actuator current 2 A or higher
Duty cycle to close throttle 80% or more
Table 3. P2112 (Throttle Actuator Stuck Closed)
All of following conditions met -
Throttle actuator current 2 A or higher
Duty cycle to open throttle 80% or more
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TYPICAL MALFUNCTION THRESHOLDS

Throttle position sensor voltage No change
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CONFIRMATION DRIVING PATTERN


  1. Connect the intelligent tester to the DLC3.

  2. Turn the ignition switch to ON and turn the intelligent tester on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).

  4. Turn the ignition switch off and wait for at least 30 seconds.

  5. Turn the ignition switch to ON and turn the intelligent tester on [A].

  6. Start the engine and fully depress and release the accelerator pedal quickly (to fully open and close the throttle valve).

  7. Enter the following menus: Powertrain / Engine and ECT / DTC [B].

  8. Read the pending DTCs.

    Tip:

    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  10. Input the DTC: P2111 or P2112.

  11. Check the DTC judgment result.

    Intelligent Tester Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    Tip:

    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

  12. If the judgment result shows INCOMPLETE or N/A, perform steps [A] through [B] again and, if necessary, drive the vehicle for a period of time.

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FAIL-SAFE

When either of these DTCs or other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions are stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator and the throttle valve is returned to a 6.5° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal position to allow the vehicle to continue at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

The ECM continues operating in fail-safe mode until a pass condition is detected, and the ignition switch is then turned off.

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WIRING DIAGRAM

Refer to DTC P2102 (Click here).

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INSPECTION PROCEDURE

Tip:

  • Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, 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.

  • Refer to "Data List / Active Test" [Throttle Position Command, Throttle Position No. 1, Throttle Motor Current, Throttle Motor Duty (Open), Throttle Motor Duty (Close)] (Click here).

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PROCEDURE


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    CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs.

      Table 4. Result
      Result Proceed to
      P2111 or P2112 is output A
      P2111 or P2112 and other DTCs are output B
      Tip:

      If any DTCs other than P2111 or P2112 are output, troubleshoot those DTCs first.


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    INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)


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

      OK
      Throttle valve is not contaminated with foreign objects and moves smoothly.

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    READ VALUE USING INTELLIGENT TESTER (THROTTLE POSITION)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Clear the DTCs (Click here).

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Turn the ignition switch to ON.

    7. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Throttle Position No. 1, Throttle Position No. 2 and Throttle Position Command.

    8. Check the values displayed on the intelligent tester while wiggling the ECM wire harness.

    9. Enter the following menus: Powertrain / Engine and ECT / DTC.

    10. Check for DTCs.

      Table 5. Result
      Result Proceed to
      Value in Data List changes when wire harness is wiggled, or DTC is output A
      Other than above B

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    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - THROTTLE BODY)


    1. As the DTC was stored due to a change in the contact resistance of the connector, repair or replace the wire harness or connector (Click here).


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    REPLACE THROTTLE BODY ASSEMBLY


    1. Replace the throttle body assembly (Click here).


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    CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Clear the DTCs (Click here).

    5. Perform the confirmation driving pattern.

    6. Enter the following menus: Powertrain / Engine and ECT / DTC.

    7. Read the DTCs.

      Table 6. Result
      Result Proceed to
      No DTC is output A
      P2111 or P2112 is output B

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    GO TO DTC CHARTClick here

  8. Click here

    REPLACE ECMClick here

  9. Click here

    END

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    END