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SFI SYSTEM, Diagnostic DTC:P1660

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DTC Code DTC Name
P1660 VSV for AICVS Circuit
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DESCRIPTION

The air cleaner is equipped with two inlets, one of which is opened or closed by the air intake control valve. This system reduces intake noise and increases engine power at low to high engine speeds range.

When the engine is operating in the low-to-mid speed range, this control operates the air intake control valve to close one of the air cleaner inlets. When the engine speed is more than 3600 rpm and the opening angle of the throttle valve is more than 60°, the ECM activates the VSV and opens the air intake control valve.

DTC No. Detection Condition Trouble Area
P1660

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 VSV is OFF

  2. The engine has been started

  • Open or short in air intake control valve circuit

  • Air intake control vale

  • ECM
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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VSV FOR AICS)


    1. A017FE1E07

      Turn the ignition switch on (IG) and turn the intelligent tester on.

    2. Select the following menu items: Powertrain / Engine and ECT / Active Test /Control the VSV for AICS.

    3. Check the operation of the VSV when the VSV is operated by the intelligent tester.

      OK
      Tester Operation Specified Condition
      VSV is ON Air from port E flows out through port F
      VSV is OFF Air from port E flows out through the air filter

  2. Click here

    INSPECT VACUUM TANK


    1. Inspect the vacuum tank (Click here).


  3. Click here

    CHECK VSV ASSEMBLY (FOR AIR INTAKE CONTROL VALVE)


    1. Inspect the VSV for AICV (Click here).


  4. Click here

    INSPECT TERMINAL VOLTAGE (VSV FOR AIR INTAKE CONTROL VALVE CONNECTOR)


    1. A017FKBE01

      Disconnect the VSV for air intake control valve connector.

    2. Turn the ignition switch on (IG).

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      1 - Body ground Ignition switch on (IG) 9 to 14 V

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    CHECK HARNESS AND CONNECTOR (VSV FOR AIR INTAKE CONTROL VALVE - ECM)


    1. A017ECRE02

      Disconnect the VSV for air intake control valve connector.

    2. Disconnect the ECM connector.

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

      Standard resistance (Check for open)
      Tester Connection Condition Specified Condition
      A10-2 - B1-27 (AICV) Always Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Condition Specified Condition
      A10-2 or B1-27 (AICV) - Body ground Always 10 kΩ or higher

    4. Reconnect the ECM connector.

    5. Reconnect the VSV for air intake control valve connector.


  6. Click here

    REPAIR OR REPLACE AIR CLEANER CAP

  7. Click here

    REPLACE ECMClick here

  8. Click here

    REPLACE VACUUM SWITCHING VALVEClick here

  9. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 3 FUSE - VSV FOR AIR INTAKE CONTROL VALVE)

  10. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR