SFI SYSTEM, Diagnostic DTC:P2111, P2112

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

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 (TP) sensor, which is mounted on the throttle body. The TP sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.

Tech Tips

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

DTC No. DTC Detection Condition Trouble Area
P2111

The ECM signals the throttle actuator to close, but the actuator is stuck

(1 trip detection logic)

  • Throttle actuator (built into throttle body assembly)

  • Throttle body assembly

  • Throttle valve

  • ECM
P2112

The ECM signals the throttle actuator to open, but the actuator is stuck

(1 trip detection logic)

  • Throttle actuator (built into throttle body assembly)

  • Throttle body assembly

  • Throttle valve

  • ECM

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 5.5° 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 opening angle, to allow the vehicle to continue running at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.

WIRING DIAGRAM

Refer to DTC P2102 Click here.

INSPECTION PROCEDURE

Tech Tips


  • Read freeze frame data using an intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

PROCEDURE


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


    1. Connect an intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. Read DTCs.

      Result
      Result Proceed to
      DTC P2111 or P2112 A
      DTC P2111 or P2112 and other DTCs output B

      Tech Tips

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


    B

    GO TO DTC CHART Click here

    A

  2. INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)


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

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

    NG

    REPLACE THROTTLE BODY ASSEMBLY Click here

    OK

  3. READ VALUE USING INTELLIGENT TESTER (THROTTLE POSITION)


    1. Connect an intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. Clear DTCs Click here.

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

    7. Turn the ignition switch to ON.

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

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

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

    11. Check for DTCs.

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

      *: 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.


    B

    CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112) Click here

    A

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

  4. REPLACE THROTTLE BODY ASSEMBLY


    1. Replace the throttle body assembly Click here.


    NEXT

  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112)


    1. Connect an intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. Clear DTCs Click here.

    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.

    8. Read DTCs.

      Result
      Result Proceed to
      No output A
      DTC P2111 or P2112 B

    B

    REPLACE ECM Click here

    A

    END