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

DTC Code DTC Name
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).

A197286E06

WIRING DIAGRAM

Refer to DTC P0660.

Click here

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. A208635C01

      *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. A194112C29

      *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