SFI SYSTEM, Diagnostic DTC:P0660

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

DESCRIPTION

This circuit opens and closes the intake air control valve (intake air surge tank) in response to changes in the engine load in order to increase the intake efficiency using the Acoustic Control Induction System (ACIS).

When the engine speed is between 2200 and 4100 rpm and the throttle valve opening angle is 60° or more, the ECM supplies current to the actuator (on status) to close the intake air control valve. Under other conditions, the intake air control valve is open.

B0028IZE07
*a Valve Closed (VSV: ON)
*b Throttle Valve Opening Angle
*c Throttle Valve
*d Engine Speed (rpm)
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):


  1. The voltage of terminal ACIS of the ECM is low when the intake air control valve (for acoustic control induction system) is off (IACV open).

  2. The engine has been started.

  • Open or short in vacuum switching valve assembly (for ACIS) circuit

  • Vacuum switching valve assembly (for ACIS)

  • EFI-MAIN No. 1 relay

  • ECM

 Comes on DTC stored

WIRING DIAGRAM

B0027YGE04

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. Turn the ignition switch to ON.

    3. Turn the GTS on.

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


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

    5. Check if operating noise can be heard when operating the intake air control valve using the GTS.

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

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  2. INSPECT VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS)


    1. Inspect the vacuum switching valve assembly (for ACIS).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS) Click here

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS))

    B00275QC01
    *a

    Front view of wire harness connector

    (to Vacuum Switching Valve Assembly (for ACIS))

    1. Disconnect the vacuum switching valve assembly (for ACIS) 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
      C6-1 - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS)) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS) - ECM)


    1. Disconnect the 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
      C6-2 - C12-5 (ACIS) Always Below 1 Ω
      C6-2 or C12-5 (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

  5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS))


    1. Disconnect the instrument panel junction block assembly connector.

    2. Disconnect the intake air control valve connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2N-1 - C6-1 Always Below 1 Ω
      2N-1 or C6-1 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    GO TO ECM POWER SOURCE CIRCUIT Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR