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 sensor, which is mounted on the throttle body assembly. 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.

Tech Tips

This 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 body assembly

  • Throttle valve

  • Wire harness or connector

  • ECM

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

  • Throttle body assembly

  • Throttle valve

  • Wire harness or connector

  • ECM

MONITOR DESCRIPTION

The ECM determines that there is a malfunction in the electronic throttle control system 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.

MONITOR STRATEGY

Required Sensors/Components Throttle actuator (throttle body assembly)
Frequency of Operation Continuous

TYPICAL ENABLING CONDITIONS

P2111: Throttle Actuator Stuck Open
All of the following conditions are met -
System guard* judge condition ON
Throttle actuator current 2 A or higher
Duty cycle to close throttle 80% or more
P2112: Throttle Actuator Stuck Closed
All of the following conditions are met -
System guard* judge condition ON
Throttle actuator current 2 A or higher
Duty cycle to open throttle 80% or more
*: System guard is ON when the following conditions met -
Throttle actuator ON
Throttle actuator duty calculation Executing
Throttle position sensor fail Not detected
Throttle actuator current-cut Not executing
Throttle actuator power supply 4 V or higher
Throttle actuator fail Not detected

TYPICAL MALFUNCTION THRESHOLDS

P2111: Throttle Actuator Stuck Open
Throttle position sensor voltage No change
P2112: Throttle Actuator Stuck Closed
Throttle position sensor voltage No change

CONFIRMATION DRIVING PATTERN

B001MX3E07

  1. Connect the intelligent tester to the DLC3.

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

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

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

  5. Turn the power switch on (IG) and turn the tester on [A].

  6. Put the engine in inspection mode (maintenance mode) Click here.

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

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

  9. Read the pending DTCs.

    Tech Tips


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

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

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

  11. Input the DTC: P2111 or P2112.

  12. Check the DTC judgment result.

    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

    Tech Tips


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

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

    • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

FAIL-SAFE

When either of these DTCs, as well as other DTCs relating to electronic throttle control system malfunctions is 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 stops the engine and the vehicle can be driven using solely the hybrid system. 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 power switch is then turned off.

WIRING DIAGRAM

Refer to DTC P2102 Click here.

CAUTION / NOTICE / HINT

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 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 the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the tester on.

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

    5. Read the DTCs.

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

      Tech Tips

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


    B
    A
  2. 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. Also, check that the throttle valve moves smoothly.

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

    NG
    OK
  3. READ VALUE USING INTELLIGENT TESTER (THROTTLE POSITION)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs Click here.

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

    6. Turn the power switch on (IG) and turn the tester 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 tester while wiggling the ECM wire harness.

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

    10. Read the DTCs.

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

    B
    A
  4. REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - THROTTLE BODY ASSEMBLY)


    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.


    NEXT
  5. REPLACE THROTTLE BODY ASSEMBLY


    1. Replace the throttle body assembly Click here.


    NEXT
  6. CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs Click here.

    5. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

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

    7. Read the DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P2111 or P2112 is output B

    A
    B