SFI SYSTEM (w/o Secondary Air Injection System), Diagnostic DTC:P2111/41, P2112/41

DTC Code DTC Name
P2111/41 Throttle Actuator Control System - Stuck Open
P2112/41 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 (TP) sensor, which is mounted on the throttle body. The TP sensor provides feedback to the ECM in order that it can control the throttle actuator, and therefore the throttle valve, appropriately in response to driver inputs.

Tech Tips

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

DTC No. DTC Detection Conditions Trouble Areas
P2111/41

Throttle actuator is stuck despite of signals to close

(1 trip detection logic)

  • Throttle actuator

  • Throttle body assembly

  • Throttle valve
P2112/41

Throttle actuator is stuck despite of signals to open

(1 trip detection logic)

  • Throttle actuator

  • Throttle body assembly

  • Throttle valve

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 sets a DTC.

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

FAIL-SAFE

When either of these DTCs, as well as other DTCs relating to ETCS (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 6.5° 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 at a minimal speed.

If the accelerator pedal is fully 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 to 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 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 P2111/41 OR P2112/41)


    1. Connect an intelligent tester to the DLC3.

    2. Turn the ignition switch to the ON position.

    3. Turn the tester ON.

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

    5. Read 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

    A

  2. CHECK THROTTLE W/MOTOR BODY ASSEMBLY (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 W/MOTOR BODY ASSEMBLY

    OK

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to the ON position.

    3. Turn the tester ON.

    4. Clear 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 DTCs.

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

    B

    REPLACE ECM

    A

    CHECK FOR INTERMITTENT PROBLEMS