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Home >> Lexus >> 2007 >> RX 400h AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> SFI System >> DTC P2111 Throttle Actuator Control System - Stuck Open; DTC P2112 Throttle Actuator Control System - Stuck Closed >> Inspection Procedure

Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. The ECM (Included in HV control ECU) 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.

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO 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. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
    5. Read the DTCs.

      Result 

      RESULT REFERENCE

      Display (DTC Output) Proceed to
      P2111 or P2112 A
      P2111 or P2112 and other DTCs B

      HINT:

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

    B: GO TO  DTC CHART  

    A: Go to next step 

  2. INSPECT THROTTLE 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 BODY ASSEMBLY 

    OK: Go to next step 

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112) 
    1. Connect the intelligent tester to the DLC3.
    2. Put the engine in inspection mode (See INSPECTION MODE PROCEDURE ).
    3. Turn the tester ON.
    4. Clear the DTCs (See DTC CHECK / CLEAR ).
    5. Start the engine, and fully depress and release the accelerator pedal quickly (to fully open and close the throttle valve).
    6. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES
    7. Read the DTCs.

      Result 

      RESULT REFERENCE

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

    B: REPLACE HV CONTROL ECU 

    A: CHECK FOR INTERMITTENT PROBLEMS