SFI SYSTEM, Diagnostic DTC:P066014

DTC Code DTC Name
P066014 Intake Manifold Tuning Valve Control Circuit Short to Ground or Open

DESCRIPTION

ACIS (Acoustic Control Induction System) controls the opening and closing the intake air control valve built into the intake air surge tank assembly to increase the intake efficiency according to the engine load.

When the engine speed is between 0 and 4300 rpm and the throttle valve opening angle is 30° or more, the ECM activates the No. 1 vacuum switching valve (for intake air control valve) which then applies vacuum from the vacuum pump assembly to the diaphragm actuator sub-assembly and closes the intake air control valve.

When the engine speed and/or throttle valve opening angle are not as specified above, the ECM deactivates the No. 1 vacuum switching valve (for intake air control valve), causing the intake air control valve to open.

B006RBNE04
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P066014 Intake Manifold Tuning Valve Control Circuit Short to Ground or Open

The following conditions are met simultaneously for 3 seconds or more (2 trip detection logic):


  1. No. 1 vacuum switching valve is OFF.

  2. The target control signal and actual control signal do not match.

  • Open or short in No. 1 vacuum switching valve (for intake air control valve) circuit

  • No. 1 vacuum switching valve (for intake air control valve)

  • ECM

 Comes on DTC stored SAE Code: P0660

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG).

  3. Turn the GTS on.

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

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

  6. Turn the engine switch on (IG).

  7. Turn the GTS on.

  8. Start the engine.

  9. Idle the engine for 5 seconds [A].

  10. Enter the following menus: Powertrain / Engine / Trouble Codes.

  11. Read the pending DTCs [B].

    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 / Utility / All Readiness.

  13. Input the DTC: P066014.

  14. Check the DTC judgment result.

    GTS 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

    Tech Tips


    • If the judgment result is NORMAL, the system is normal.

    • If the judgment result is ABNORMAL, the system has a malfunction.

    • If the judgment result is INCOMPLETE, perform steps [A] and [B] again.

WIRING DIAGRAM

B006NVKE01

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

Tech Tips

Read freeze frame data using the GTS. 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. PERFORM ACTIVE TEST USING GTS (ACTIVATE THE VSV FOR INTAKE CONTROL)


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Intake Control.


      Powertrain > Engine > Active Test
      Tester Display
      Activate the VSV for Intake Control

    5. According to the display on the GTS, perform the Active Test to operate the No. 1 vacuum switching valve (for intake air control valve) and check for the operating sound of the intake air control valve in the intake air surge tank assembly.

      OK
      Operating noise can be heard.
      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  2. INSPECT NO. 1 VACUUM SWITCHING VALVE (FOR INTAKE AIR CONTROL VALVE)


    1. Inspect the No. 1 vacuum switching valve (for intake air control valve).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 VACUUM SWITCHING VALVE (FOR INTAKE AIR CONTROL VALVE) Click here

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 1 VACUUM SWITCHING VALVE (FOR INTAKE AIR CONTROL VALVE))

    B006M92C09
    *a

    Front view of wire harness connector

    (to No. 1 Vacuum Switching Valve (for Intake Air Control Valve))

    1. Disconnect the No. 1 vacuum switching valve (for intake air control valve) connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D77-2 (+B) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - NO. 1 VACUUM SWITCHING VALVE (FOR INTAKE AIR CONTROL VALVE))

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 1 VACUUM SWITCHING VALVE (FOR INTAKE AIR CONTROL VALVE) - ECM)


    1. Disconnect the No. 1 vacuum switching valve (for intake air control valve) connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D77-1 (ACIS) - D110-66 (ACIS) Always Below 1 Ω
      D77-1 (ACIS) or D110-66 (ACIS) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR