SFI SYSTEM, Diagnostic DTC:P2004, P2006

DTC Code DTC Name
P2004 Intake Manifold Runner Control Stuck Open (Bank 1)
P2006 Intake Manifold Runner Control Stuck Closed (Bank 1)

DESCRIPTION

The Tumble Control Valve (TCV) is built into the intake manifold. The intake air control valve actuator (for tumble control valve) is composed of a position sensor and a DC motor. The DC motor opens and closes the tumble control valve in response to signals from the ECM. The position sensor detects the opening angle of the tumble control valve.

When the tumble control valve is closed, the intake air tumble flow intensifies and negative pressure is generated between the tumble control valve and intake valve which atomizes the fuel. Combustion is enhanced and exhaust gas emissions are reduced at low temperatures.

DTC No. DTC Detection Condition Trouble Area
P2004 The tumble control valve opening angle is 17 deg. or more after requesting the tumble control valve to fully close (2 trip detection logic).

  • Intake air control valve actuator (for tumble control valve) circuit

  • Intake air control valve actuator (for tumble control valve)

  • Intake manifold

  • ECM
P2006 The tumble control valve opening angle is less than 35 deg. after requesting the tumble control valve to fully open (2 trip detection logic).

  • Intake air control valve actuator (for tumble control valve) circuit

  • Intake air control valve actuator (for tumble control valve)

  • Intake manifold

  • ECM

Tech Tips

When P2004 and/or P2006 is output, use the intelligent tester to confirm Intake Air Control Position while performing Control the IAC Duty Ratio of the Active Test.

Reference (Normal condition: When Engine Warmed Up)
Control the IAC Duty Ratio Operation Intake Air Control Position
100% Approximately 70 deg.
0% Approximately 70 deg.
-100% Approximately 2 deg.

MONITOR DESCRIPTION

When the ECM has requested a tumble control valve close operation but the actual tumble control valve opening angle is 17 deg. or more for 10 seconds, DTC P2004 is stored. When the ECM has requested a tumble control valve open operation but the actual tumble control valve opening angle is less than 35 deg. for 10 seconds, DTC P2006 is stored.

MONITOR STRATEGY

Required Sensors/Components (Main) Tumble control valve
Required Sensors/Components (Related)

Intake air temperature sensor

Engine coolant temperature sensor
Frequency of Operation Once per driving cycle

CONFIRMATION DRIVING PATTERN

A01EWAYE01

  1. Connect the intelligent tester to the DLC3.

  2. Turn the ignition switch to ON.

  3. Turn the tester on.

  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

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

  6. Turn the ignition switch to ON and turn the tester on [A].

  7. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp.

    Tech Tips


    • Check for DTC P2004 at a engine coolant temperature of 30°C (86°F) or less.

    • Check for DTC P2006 at a engine coolant temperature of 80°C (176°F) or higher.

  8. Turn the ignition switch off.

  9. Turn the ignition switch to ON, wait approximately 10 seconds, and then turn the ignition switch off. Repeat this procedure 3 times [B].

  10. Enter the following menus: Powertrain / Engine and ECT / DTC [C].

  11. 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.

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

  13. Input the DTC: P2004 or P2006.

  14. 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's 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.

WIRING DIAGRAM

A01EUUME02

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2004 OR P2006)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P2004 or P2006 is output A
      DTC P2004 or P2006 and other DTCs are output B

      Tech Tips

      If any DTCs other than P2004 or P2006 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. INSPECT INTAKE AIR CONTROL VALVE ACTUATOR (FOR TUMBLE CONTROL VALVE)


    1. Inspect the intake air control valve actuator (for tumble control valve) Click here.

      Tech Tips

      Perform "Inspection After Repair" after replacing the intake manifold Click here.


    NG

    REPLACE INTAKE AIR CONTROL VALVE ACTUATOR (FOR TUMBLE CONTROL VALVE) Click here

    OK

  3. INSPECT INTAKE MANIFOLD (TROUBLE CONTROL VALVE OPERATION)


    1. Inspect the intake manifold for the tumble control valve operation Click here.


    NG

    REPLACE INTAKE MANIFOLD Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (INTAKE AIR CONTROL VALVE ACTUATOR - ECM)


    1. Disconnect the ECM connector.

    2. Disconnect the intake air control valve actuator connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y4-4 (M-) - E26-21 (IA1-) Always Below 1 Ω
      Y4-5 (M+) - E26-22 (IA1+) Always Below 1 Ω
      Y4-4 (M-) or E26-21 (IA1-) - Body ground Always 10 kΩ or higher
      Y4-5 (M+) or E26-22 (IA1+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P2004 OR P2006)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Clear the DTCs.

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

    6. Turn the ignition switch to ON.

    7. Turn the tester on.

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

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

    10. Read the DTCs.

      Result
      Result Proceed to
      DTC P2004 or P2006 is output A
      DTC is not output B

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

    REPLACE ECM Click here