SFI SYSTEM Active Control Engine Mount System

DESCRIPTION

A017EEXE01

The active control engine mount system decreases engine vibration at an engine idling using the active control engine mount VSV. The VSV is controlled by a pulse signal transmitted to the VSV from the ECM. The frequency of this pulse signal is matched to the engine speed to decrease engine vibration.

WIRING DIAGRAM

A017C5PE27

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK VACUUM HOSES


    1. A017C25E05

      Check the air and vacuum hoses for looseness, disconnection and blockage. If the hose is damaged, replace the vacuum hose assembly.


    NG

    REPAIR OR REPLACE VACUUM HOSES

    OK

  2. CHECK VACUUM


    1. A017BT2

      Start the engine.

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

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

      OK
      Vacuum pressure exists.

    4. Reconnect the vacuum hose.


    NG

    CHECK AND REPLACE VACUUM SOURCE AND HOSES

    OK

  3. INSPECT ECM


    1. A017G43E08

      Connect the oscilloscope between terminals ACM and E1 of the ECM connectors.

    2. Warm up the engine to normal operating temperature.

    3. Turn the A/C switch on.

    4. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Condition Voltage
      B1-3 (ACM) - B3-1 (E1) Shift position is D, and engine speed is 850 rpm or less Pulse generation
      Shift position is D, and engine speed is 950 rpm or more 9 to 14 V
      Shift position is P 9 to 14 V

    NG

    INSPECT DUTY VACUUM SWITCHING VALVE (RESISTANCE) Click here

    OK

  4. INSPECT DUTY VACUUM SWITCHING VALVE (OPERATION)


    1. A017G1YE04

      Remove the VSV for ACM.

    2. Check operation of the VSV for ACM when positive battery voltage is applied to the terminals of the VSV for ACM connector.

      Positive battery voltage is not applied
      The air from pipe G is flowing out through pipes E and H.
      Positive battery voltage is applied
      The air from pipe F is flowing out through pipes E and H.

    3. Reinstall the VSV for ACM.


    NG

    REPLACE DUTY VACUUM SWITCHING VALVE

    OK

  5. INSPECT ENGINE MOUNTING INSULATOR ASSEMBLY FRONT


    1. A017DCU

      Disconnect the vacuum hose from the front engine mount insulator.

    2. Using vacuum pump, apply vacuum of 80 kPa (600 mmHg, 25 in.Hg) and wait for 1 minute.

    3. Check that there is no change in the needle movement of the vacuum pump gauge.

    4. Check that there is no fluid leakage caused by a break in the diaphragm.

      OK
      Vacuum pressure exists.

    5. Reconnect the vacuum hose.


    NG

    REPLACE ENGINE MOUNTING INSULATOR ASSEMBLY FRONT

    OK

    SYSTEM OK

  6. INSPECT DUTY VACUUM SWITCHING VALVE (RESISTANCE)


    1. A017E1SE01

      Disconnect the VSV for ACM connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 19 to 21 Ω

    3. Reconnect the VSV for ACM connector.


    NG

    REPLACE DUTY VACUUM SWITCHING VALVE Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (VSV FOR ACM - ECM, VSV FOR ACM - EFI RELAY)


    1. A017EW1E02

      Disconnect the VSV for ACM connector.

    2. Disconnect the ECM connector.

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

      Standard resistance (Check for open)
      Tester Connection Condition Specified Condition
      B8-2 - B1-3 (ACM) Always Below 1 Ω
      Standard resistance (Check for open)
      Tester Connection Condition Specified Condition
      B8-2 or B1-3 (ACM) - Body ground Always 10 kΩ or higher

    4. Reconnect the ECM connector.

    5. Reconnect the VSV connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (VSV FOR ACM - ECM)

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (VSV FOR ACM - EFI NO. 3 FUSE)