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DTC P0505: Idle Control System [12/2015 - 08/2016]: Procedure

WARNING: This page is about a different car, the 2016 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Trouble Codes.
    5. Read DTCs.
      RESULT

      Result Proceed to
      DTC P0505 is output A
      DTC P0505 and other DTCs are output B

      HINT: 

      If any DTCs other than P0505 are output, troubleshoot those DTCs first.

    Result: 

    GO TO DTC CHART 

    (Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2015 - 08/2016] )

    Result: 

    See step  2

  2. CHECK PCV HOSE (HOSE CONNECTIONS) 
    1. Check the PCV hose connections (Refer to COMPONENTS [12/2015 - 08/2016] ).

      OK

      PCV valve and hose are connected correctly and are not damaged.

    Result: 

    NG 

    REPAIR OR REPLACE PCV HOSE 

    Result: 

    OK 

    See step  3

  3. CHECK INTAKE SYSTEM 
    1. Check the intake system for vacuum leaks (Refer to ON-VEHICLE INSPECTION [12/2015 - 08/2016] ).

      OK

      No leaks in intake system.

      HINT: 

      Perform "Inspection After Repair" after repairing or replacing the intake system (Refer to INITIALIZATION [12/2015 - 08/2016] ).

    Result: 

    NG 

    REPAIR OR REPLACE INTAKE SYSTEM 

    Result: 

    OK 

    See step  4

  4. CHECK THROTTLE BODY WITH MOTOR ASSEMBLY (VISUALLY CHECK THROTTLE VALVE) 
    1. Check for contamination between the throttle valve and the housing, and check that the throttle valve moves smoothly.

      OK

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

      HINT: 

      Perform "Inspection After Repair" after repairing the throttle body with motor assembly (Refer to INITIALIZATION [12/2015 - 08/2016] ).

    Result: 

    NG 

    REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY 

    (Refer to REMOVAL [12/2015 - 08/2016] )

    Result: 

    OK 

    See step  5

  5. CONFIRM WHETHER DTC OUTPUT RECURS 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    5. Read DTCs.
      RESULT

      Result Proceed to
      DTC P0505 is output A
      No DTC is output B

    Result: 

    REPLACE ECM 

    (Refer to REMOVAL [12/2015 - 08/2016] )

    Result: 

    END