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 built into the throttle body assembly. 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 Condition Trouble Area
P2111 The throttle actuator does not close when signaled by the ECM (1 trip detection logic).

  • Throttle actuator


  • Throttle body assembly


  • Throttle valve


  • ECM
P2112 The throttle actuator does not open when signaled by the ECM (1 trip detection logic).

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° opening 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. Fail-safe mode continues until a pass condition is detected and the engine switch is turned off.

WIRING DIAGRAM

Refer to DTC P2102 Click here.

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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, and other data from the time the malfunction occurred.

PROCEDURE


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


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

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

    NG

    REPLACE THROTTLE BODY ASSEMBLY Click here

    OK

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG) and turn the tester on.

    3. Clear DTCs Click here.

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

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

    6. Read DTCs.

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

    B

    REPLACE ECM Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here