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.

B002E1BE09

WIRING DIAGRAM

B002DO3E01

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (ACTIVATE THE VSV FOR AICS)

    B002EGQC03
    *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 / Activate / Active Test the VSV for ACIS


      Powertrain > Engine > Active Test
      Tester Display
      Activate the VSV for AICS

    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 AIR CLEANER CASE SUB-ASSEMBLY (VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS))


    1. Inspect the air cleaner case sub-assembly (vacuum switching valve assembly (for ACIS)).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE AIR CLEANER CASE SUB-ASSEMBLY (VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS)) (FOR AIR INTAKE CONTROL VALVE)

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIR CLEANER CASE SUB-ASSEMBLY (VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS)))

    B002CL3C55
    *a

    Front view of wire harness connector

    (to Air Cleaner Case Sub-assembly (Vacuum Switching Valve Assembly (for ACIS))

    1. Disconnect the air cleaner case sub-assembly (vacuum switching valve assembly (for ACIS)) 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
      A27-2 - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - AIR CLEANER CASE SUB-ASSEMBLY (VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS))) Click here

    OK

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


    1. Disconnect the A27 air cleaner case sub-assembly (vacuum switching valve assembly (for ACIS)) connector.

    2. Disconnect the E1 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A27-1 - E1-7 (AICV) Always Below 1 Ω
      A27-1 or E1-7 - Body ground and other terminals 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 (NO. 1 INTEGRATION RELAY - AIR CLEANER CASE SUB-ASSEMBLY (VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS)))


    1. Remove the No. 1 integration relay from No. 2 engine room relay block.

    2. Disconnect the A27 air cleaner case sub-assembly (vacuum switching valve assembly (for ACIS)) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2E-14 - A27-2 Always Below 1 Ω
      2E-14 or A27-2 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 1 INTEGRATION RELAY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR