SFI SYSTEM(w/ Canister Pump Module) Air Intake Control Circuit

DESCRIPTION

The air cleaner is equipped with two inlets, one of which is opened or closed by the Air Intake Control Valve (AICV). This system reduces intake noise and increases engine power at low-to-high engine speed range. When the engine is operating in the low-to-mid speed range, this control operates the AICV to close one of the air cleaner inlets. When the engine speed is more than 3600 rpm, the ECM activates VSV and opens the AICV.

B006843E08

WIRING DIAGRAM

B0067PTE01

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. INSPECT VACUUM SWITCHING VALVE (FOR AIR INTAKE CONTROL VALVE)

    B00679PC01
    *1 Air
    *2 Port E
    *3 Port F
    *4 Air Filter
    *a Vacuum Switching Valve is On
    *b Vacuum Switching Valve is Off

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Active Test / Active Test the VSV for ACIS

    5. Check for operation of the VSV when the VSV is operated using the GTS.

      Standard
      GTS Connection Specified Condition
      ON Air from port E flows out through port F
      OFF Air from port E flows out through the air filter
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. INSPECT VACUUM SWITCHING VALVE (FOR AIR INTAKE CONTROL VALVE)


    1. Inspect the vacuum switching valve (for air intake control valve).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE VACUUM SWITCHING VALVE (FOR AIR INTAKE CONTROL VALVE)

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF VACUUM SWITCHING VALVE (FOR AIR INTAKE CONTROL VALVE))

    B0066XNC93
    *a

    Front view of wire harness connector

    (to Vacuum Switching Valve (for Air Intake Control Valve))

    1. Disconnect the vacuum switching valve (for air intake control valve) 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 Condition Specified Condition
      A4-2 (+B) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU - VACUUM SWITCHING VALVE (FOR AIR INTAKE CONTROL VALVE)) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE (FOR AIR INTAKE CONTROL VALVE) - ECM)


    1. Disconnect the vacuum switching valve (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
      Tester Connection Condition Specified Condition
      A4-1 (AIRV) - F1-7 (AICV) Always Below 1 Ω
      A4-1 (AIRV) or F1-7 (AICV) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT AIR CLEANER ASSEMBLY (VACUUM SURGE TANK)


    1. Inspect the vacuum surge tank.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE AIR CLEANER ASSEMBLY

  6. CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU - VACUUM SWITCHING VALVE (FOR AIR INTAKE CONTROL VALVE))


    1. Disconnect the semiconductor pwr integration ECU connector.

    2. Disconnect the vacuum switching valve (for air intake control valve) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2G-1 - A4-2 (+B) Always Below 1 Ω
      2G-1 or A4-2 (+B) - Body ground 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