SFI SYSTEM(w/ EGR System) ACIS Control Circuit

DTC Code DTC Name
ACIS Control Circuit

DESCRIPTION

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

A233285E01

WIRING DIAGRAM

A231452E14

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE VACUUM SWITCHING VALVE FOR ACIS)

    1. A233358C01

      *a

      VSV is ON

      *b

      VSV is OFF

      *c

      Air

      Disconnect the vacuum hose from port F on the vacuum switching valve (for ACIS).

    2. Connect the intelligent tester 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 for ACIS.

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

      OK

      Test Condition

      Specified Condition

      Vacuum switching valve is ON

      Air from port E flows out through port F

      Vacuum switching valve is OFF

      Air from port E flows out through air filter

      Result

      Result

      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)

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE VACUUM HOSES

    OK

  3. INSPECT INTAKE MANIFOLD (INTAKE AIR CONTROL VALVE)

    1. Inspect the intake air control valve.

      Click here

      Result

      Result

      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 ACIS).

      Click here

      Result

      Result

      OK

      NG
    NG

    REPLACE VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS)

    Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE (FOR ACIS) - ECM AND NO. 1 INTEGRATION RELAY)

    1. Disconnect the vacuum switching valve (for ACIS) connector.

    2. Disconnect the ECM connector.

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

    4. Disconnect the No. 1 integration relay connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      C9-2 - C30-19 (ACIS)

      Always

      Below 1 Ω

      C9-1 - 1B-4

      Always

      Below 1 Ω

      C9-2 or C30-19 (ACIS) - Body ground

      Always

      10 kΩ or higher

      C9-1 or 1B-4 - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    OK

    REPLACE ECM

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR