SFI SYSTEM(for Rear Air Fuel Ratio Sensor) Active Control Engine Mount System

DESCRIPTION


The active control engine mount system decreases engine vibration at a low engine speed using the vacuum switching valve assembly (for active control engine mount). The vacuum switching valve assembly (for active control engine mount) is controlled by a pulse signal transmitted to the vacuum switching valve assembly (for active control engine mount) from the ECM. The frequency of this pulse signal is matched to the engine speed to decrease engine vibration.

WIRING DIAGRAM

B007Y1NE26

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK VACUUM HOSES

    B007XPXC04
    *1 Engine
    *2 Vacuum Switching Valve Assembly (for Active Control Engine Mount)
    *3 Front Engine Mounting Insulator Assembly
    *4 ECM
    *5 Vacuum Pump
    *6 Vacuum Hose

    1. Check the air and vacuum hoses for looseness, disconnection and blockage.

      OK
      No looseness, disconnection or blockage.
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE VACUUM HOSES

    OK

  2. CHECK VACUUM

    B007XRS

    1. Disconnect the vacuum hose from the air cleaner cap.

    2. Start the engine.

    3. Check that the disconnected port located on the vacuum tank applies suction to your finger.

      OK
      Vacuum exists.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT VACUUM PUMP ASSEMBLY Click here

    OK

  3. INSPECT VACUUM SWITCHING VALVE ASSEMBLY (FOR ACTIVE CONTROL ENGINE MOUNT)


    1. Inspect the vacuum switching valve assembly (for active control engine mount).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE VACUUM SWITCHING VALVE ASSEMBLY (FOR ACTIVE CONTROL ENGINE MOUNT) Click here

    OK

  4. INSPECT FRONT ENGINE MOUNTING INSULATOR ASSEMBLY


    1. Inspect the front engine mounting insulator assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT ENGINE MOUNTING INSULATOR ASSEMBLY Click here

    OK

  5. CHECK TERMINAL VOLTAGE (POWER SOURCE OF VACUUM SWITCHING VALVE ASSEMBLY (FOR ACTIVE CONTROL ENGINE MOUNT))

    B007Y2QC47
    *a

    Front view of wire harness connector

    (to Vacuum Switching Valve Assembly (for Active Control Engine Mount))

    1. Disconnect the vacuum switching valve assembly (for active control engine mount) 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
      D10-1 - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR POWER INTEGRATION ECU - VACUUM SWITCHING VALVE ASSEMBLY (FOR ACTIVE CONTROL ENGINE MOUNT)) Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE ASSEMBLY (FOR ACTIVE CONTROL ENGINE MOUNT) - ECM)


    1. Disconnect the vacuum switching valve assembly (for active control engine mount) 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
      D10-2 - D1-62 (ACM) Always Below 1 Ω
      D10-2 or D1-62 (ACM) - Body ground and other terminals 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 (SEMICONDUCTOR POWER INTEGRATION ECU - VACUUM SWITCHING VALVE ASSEMBLY (FOR ACTIVE CONTROL ENGINE MOUNT))


    1. Disconnect the semiconductor power integration ECU connector.

    2. Disconnect the vacuum switching valve assembly (for active control engine mount) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1G-1 - D10-1 Always Below 1 Ω
      1G-1 or D10-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SEMICONDUCTOR POWER INTEGRATION ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR