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СИСТЕМА SFI, Diagnostic DTC:P0660

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

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

DTC No. DTC Detection Condition Trouble Area
P0660

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


  1. Voltage of acoustic control induction system terminal of the ECM is low when the actuator is off.

  2. The engine has been started.


  • Open or short in intake air control valve circuit

  • Intake air surge tank assembly (intake air control valve assembly)

  • ECM

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

Tip:

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.

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PROCEDURE


  1. Click here

    PERFORM ACTIVE TEST USING GTS (OPERATE VSV FOR ACIS)


    1. Disconnect the vacuum hose from port F on the vacuum switching valve (for ACIS).

    2. Connect the GTS to the DLC3.

    3. Start the engine.

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

    5. Operate the VSV for ACIS.

    6. Check the VSV air flow when switching the VSV.

      OK
      Test Condition Specified Condition
      VSV is ON Air from port E flows out through port F
      VSV is OFF Air from port E flows out through air filter
      Table 1. Text in Illustration
      *a VSV is ON
      *b VSV is OFF
      *c Air

  2. Click here

    INSPECT VACUUM SWITCHING VALVE (FOR ACIS)


    1. Inspect the vacuum switching valve (for ACIS) (Click here).


  3. Click here

    CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE VOLTAGE)


    1. A01EPX8E03

      Disconnect the intake air control valve assembly 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 Switch Condition Specified Condition
      C38-1 - Body ground Engine switch on (IG) 11 to 14 V
      Table 2. Text in Illustration
      *a

      Front view of wire harness connector

      (to Intake Air Control Valve Assembly)

    4. Reconnect the intake air control valve assembly connector.


  4. Click here

    CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE - ECM)


    1. Disconnect the intake air control valve assembly 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
      C38-2 - C54-62 (ACIS) Always Below 1 Ω
      C38-2 or C54-62 (ACIS) - Body ground Always 10 kΩ or higher
    4. Reconnect the intake air control valve assembly connector.

    5. Reconnect the ECM connector.


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    CHECK FOR INTERMITTENT PROBLEMSClick here

  6. Click here

    REPLACE VACUUM SWITCHING VALVE (FOR ACIS)Click here

  7. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI MAIN RELAY - VACUUM SWITCHING VALVE)

  8. Click here

    REPLACE ECMClick here

  9. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (VACUUM SWITCHING VALVE - ECM)