SFI SYSTEM (w/ Electronic Throttle Control System), Diagnostic DTC:P2112

DTC Code DTC Name
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 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 Aria
P2112

When the throttle does not quickly open after current is applied to the throttle motor.

(1 trip detection logic)

  • Open or short circuit in throttle motor circuit

  • Throttle body assembly

Tech Tips

Detection for P2112 is performed during electronic throttle learning. (Detection is also performed in the case of electronic throttle learning using a tester).

WIRING DIAGRAM

A0137P5E01

INSPECTION PROCEDURE

Note

After replace the ECM or throttle, perform electronic throttle learning Click here.

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.

PROCEDURE


  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P2112)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON.

    3. Turn the tester ON.

    4. Enter the following menus: Power train / Engine / DTC .

    5. Read DTCs.

      Result
      Display (DTC Output) Proceed to
      P2112 A
      P2112 and other DTCs B

      Tech Tips

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


    B

    GO TO DTC CHART

    A

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


    1. Check for contamination between the throttle valve and the housing.

      If necessary, clean the throttle body.

    2. Check that the throttle valve moves smoothly.

      OK
      The throttle valve is not contaminated with foreign objects and can move smoothly.

    NG

    REPLACE THROTTLE BODY ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (THROTTLE BODY - ECM)


    1. A0136MPE01

      Disconnect the B28 throttle body connector.

    2. Disconnect the B25 and B26 ECM connectors

    3. Measure the resistance between the throttle body connector and ECM connector.

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      M+ (B28-4) - M+ (B26-22) Below 1 Ω
      M- (B28-1) - M- (B26-20) Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Specified Condition
      M+ (B28-4) or M+ (B26-22) - Body ground 10 kΩ or higher
      M- (B28-1) or M- (B26-20) - Body ground 10 kΩ or higher

    4. Reconnect the throttle body connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  4. REPLACE THROTTLE BODY ASSEMBLY


    1. Replace the throttle body assembly Click here.

    2. Perform electronic throttle learning Click here.


    NEXT

    CHECK IF DTC OUTPUT RECURS