SFI SYSTEM(w/ Canister Pump Module) ACIS Control Circuit

DESCRIPTION

This circuit opens and closes the Intake Air Control Valve (IACV) according to the engine load in order to increase intake efficiency (ACIS: Acoustic Control Induction System).

A01CYPAE06

WIRING DIAGRAM

A01CX8WE03

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 (OPERATE VACUUM SWITCHING VALVE FOR ACIS)


    1. A01CX36C01
      *1 Air
      *2 Port F
      *3 Port E
      *4 Air Filter
      *a Vacuum Switching Valve Assembly is ON
      *b Vacuum Switching Valve Assembly is OFF

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

    2. Connect the GTS to the DLC3.

    3. Start the engine.

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


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

    5. Operate the vacuum switching valve assembly for acoustic control induction system.

    6. Check the vacuum switching valve assembly air flow when switching the vacuum switching valve assembly.

      OK
      Test Condition Specified Condition
      Vacuum switching valve assembly is ON Air from port E flows out through port F
      Vacuum switching valve assembly is OFF Air from port E flows out through air filter
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS) Click here

    OK

  2. CHECK VACUUM HOSES (VACUUM SWITCHING VALVE (FOR ACIS) - INTAKE AIR CONTROL VALVE, INTAKE MANIFOLD)


    1. Check the vacuum hoses.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE VACUUM HOSES

    OK

  3. INSPECT INTAKE MANIFOLD (INTAKE AIR CONTROL VALVE)


    1. Inspect the intake air control valve (for acoustic control induction system).

      Click here

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE INTAKE MANIFOLD Click here

  4. INSPECT VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS)


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

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS) Click here

    OK

  5. CHECK TERMINAL VOLTAGE (POWER SOURCE OF VACUUM SWITCHING VALVE ASSEMBLY)


    1. A01CWRKC29
      *a

      Front view of wire harness connector

      (to Vacuum Switching Valve Assembly (for ACIS))

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

    NG

    CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 1 RELAY - VACUUM SWITCHING VALVE ASSEMBLY) Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE ASSEMBLY - ECM)


    1. Disconnect the vacuum switching valve assembly 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 - B77-69 (ACIS) Always Below 1 Ω
      B44-1 or B77-69 (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

  7. CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 1 RELAY - VACUUM SWITCHING VALVE ASSEMBLY)


    1. Remove the EFI-MAIN No. 1 relay from the engine room relay block and junction block assembly.

    2. Disconnect the vacuum switching valve assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      EFI-MAIN NO. 1 relay terminal 3 - B44-2 Always Below 1 Ω
      EFI-MAIN NO. 1 relay terminal 3 or B44-2 - 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