SFI SYSTEM, Diagnostic DTC:P0660

DTC Code DTC Name
P0660 Intake Manifold Tuning Valve Control Circuit / Open (Bank 1)

DESCRIPTION

A002CISC03
*a Intake Air Control Valve Open *b Intake Air Control Valve Closed

This circuit opens and closes the Intake Air Control Valve (IACV) in response to changes in the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0660 Intake Manifold Tuning Valve Control Circuit / Open (Bank 1)

The following conditions are met simultaneously for 0.5 seconds or more (2 trip detection logic):


  • The voltage of terminal ACIS of the ECM is low when the vacuum switching valve assembly (for acoustic control induction system) is off.

  • The engine has been started.

  • Open or short in vacuum switching valve assembly (for acoustic control induction system) circuit

  • Vacuum switching valve assembly (for acoustic control induction system)

  • Semiconductor pwr integration ECU

  • ECM

 Comes on DTC stored

WIRING DIAGRAM

A00294XE14

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 (ACTIVE THE VSV FOR INTAKE CONTROL)

    A002AG5C03
    *1 Port F
    *2 Port E
    *a ON
    *b OFF
    *c Air

    1. Disconnect the vacuum hose from port F on the vacuum switching valve assembly (for acoustic control induction system).

    2. Connect the GTS to the DLC3.

    3. Start the engine.

    4. Turn the GTS on.

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


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

    6. Operate the vacuum switching valve assembly (for acoustic control induction system) check the air flow.

      Standard
      Activate the VSV for Intake Control Specified Condition
      ON Air from port E flows out through port F
      OFF Air from port E flows out through air filter
      Result
      Result Proceed to
      Abnormal A
      Normal B

      Tech Tips

      Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.


    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  2. INSPECT VACUUM SWITCHING VALVE ASSEMBLY (FOR ACOUSTIC CONTROL INDUCTION SYSTEM)


    1. Inspect the vacuum switching valve assembly (for acoustic control induction system).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE VACUUM SWITCHING VALVE ASSEMBLY (FOR ACOUSTIC CONTROL INDUCTION SYSTEM) Click here

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF VACUUM SWITCHING VALVE ASSEMBLY (FOR ACOUSTIC CONTROL INDUCTION SYSTEM))

    A0029IHC70
    *a Front view of wire harness connector (to Vacuum Switching Valve Assembly (for Acoustic Control Induction System))

    1. Disconnect the vacuum switching valve assembly (for acoustic control induction system) connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      C10-2 - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU - VACUUM SWITCHING VALVE ASSEMBLY (FOR ACOUSTIC CONTROL INDUCTION SYSTEM)) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE ASSEMBLY (FOR ACOUSTIC CONTROL INDUCTION SYSTEM) - ECM)


    1. Disconnect the vacuum switching valve assembly (for acoustic control induction system) 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
      C10-1 - C1-69 (ACIS) Always Below 1 Ω
      C10-1 or C1-69 (ACIS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU - VACUUM SWITCHING VALVE ASSEMBLY (FOR ACOUSTIC CONTROL INDUCTION SYSTEM))


    1. Disconnect the semiconductor pwr integration ECU.

    2. Disconnect the vacuum switching valve assembly (for acoustic control induction system) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-7 - C10-2 Always Below 1 Ω
      1G-7 or C10-2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SEMICONDUCTOR PWR INTEGRATION ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR