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 the 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 it can control the throttle actuator and the throttle valve appropriately in response to driver inputs.

Tech Tips

This electronic throttle control system does not use a throttle cable.

DTC No. DTC Detection Condition Trouble Area
P2111 ECM signals throttle actuator to close, but stuck (1 trip detection logic)

  • Throttle actuator

  • Throttle body

  • Throttle valve
P2112 ECM signals throttle actuator to open, but stuck (1 trip detection logic)

  • Throttle actuator

  • Throttle body

  • Throttle valve

FAIL-SAFE

When either of these DTCs, as well as other DTCs relating to electronic throttle control system malfunctions, is set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator off, and the throttle valve is returned to a 6° 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 at a minimal speed.

If the accelerator pedal is depressed slowly, 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 the 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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE


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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Turn the tester on.

    4. Select the following menu items: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs.

      Result
      Display (DTC Output) Proceed to
      P2111 or P2112 A
      P2111 or P2112 and other DTCs 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 (VISUALLY CHECK THROTTLE VALVE)


    1. 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
      Throttle valve is not contaminated with foreign objects and moves smoothly.

    NG

    REPLACE THROTTLE BODY Click here

    OK

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs Click here.

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

    6. Select the following menu items: Powertrain / Engine and ECT / DTC.

    7. Read the DTCs.

      Result
      Display (DTC Output) Proceed to
      No DTC A
      P2111 or P2112 B

    B

    REPLACE ECM Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here