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Home >> Lexus >> 2012 >> IS 350 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P060A-U0101) & Circuit Tests) >> SFI System >> DTC P2111: Throttle Actuator Control System - Stuck Open; DTC P2112: Throttle Actuator Control System - Stuck Closed >> Procedure
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DTC P2111: Throttle Actuator Control System - Stuck Open; DTC P2112: Throttle Actuator Control System - Stuck Closed: Procedure

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Trouble Codes.
    5. Read DTCs.

      Result

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

      HINT: 

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

    B → See step   8 

    A: Go to next step 

  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. Also check that the throttle valve moves smoothly.

      OK

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

    NG → See step   5 

    OK: Go to next step 

  3. READ VALUE USING TECHSTREAM (THROTTLE POSITION) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs. Refer to DTC CHECK / CLEAR .
    5. Turn the engine switch off and wait for at least 30 seconds.
    6. Turn the engine switch on (IG) and turn the Techstream on.
    7. Enter the following menus: Powertrain / Engine / Data List / All Data / Throttle Position No. 1, Throttle Position No. 2 and Throttle Position Command.
    8. Read the values displayed on the Techstream while wiggling the ECM wire harness.
    9. Enter the following menus: Powertrain / Engine / Trouble Codes.
    10. Check for 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 → See step   6 

    A: Go to next step 

  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. Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE .

    NEXT → END 

  5. REPLACE THROTTLE BODY ASSEMBLY 
    1. Replace the throttle body assembly. Refer to REMOVAL .

    NEXT: Go to next step 

  6. CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs. Refer to DTC CHECK / CLEAR .
    5. Turn the engine switch off and wait for at least 30 seconds.
    6. Turn the engine switch on (IG).
    7. Turn the Techstream on.
    8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    9. Enter the following menus: Powertrain / Engine / Trouble Codes.
    10. Read DTCs.

      Result

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

    B → See step   7 

    A → END 

  7. REPLACE ECM. Refer to  REMOVAL 
  8. GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART