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 (IACV) in response to changes in the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).

A01KCVHC01
*1 Vacuum Switching Valve (for Acoustic Control Induction System) *2 Intake Air Control Valve
*a Intake Air Control Valve Open *b Intake Air Control Valve Close
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. Voltage of terminal ACIS of the ECM is low when the vacuum switching valve (for acoustic control induction system) is off.

  2. The engine has been started.

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

  • Vacuum switching valve (for acoustic control induction system)

  • ECM

 Comes on DTC stored

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS on.

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

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

  5. Turn the ignition switch to ON and turn the GTS on.

  6. Wait 5 seconds or more.

  7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

  8. 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.

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

  10. Input the DTC: P0660.

  11. 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
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU 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

A01KDH6E02

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection 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. A01KD1AC03
      *1 Port F
      *2 Port E
      *3 Air Filter
      *a Vacuum Switching Valve (for Acoustic Control Induction System) is ON
      *b Vacuum Switching Valve (for Acoustic Control Induction System) is OFF
      *c Air

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

    7. Check the vacuum switching valve (for acoustic control induction system) air flow when switching the vacuum switching valve (for acoustic control induction system).

      OK
      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
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

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


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

      Result
      Proceed to
      OK
      NG

    NG

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

    OK

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


    1. A01KD0XC08
      *a

      Front view of wire harness connector

      (to Vacuum Switching Valve (for Acoustic Control Induction System))

      Disconnect the vacuum switching valve (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
      B44-2 - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (VACUUM SWITCHING VALVE (FOR ACOUSTIC CONTROL INDUCTION SYSTEM) - EFI-MAIN NO.1 RELAY)

    OK

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


    1. Disconnect the vacuum switching valve (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
      B44-1 - B75-50 (ACIS) Always Below 1 Ω
      B44-1 or B75-50 (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