SFI SYSTEM Active Control Engine Mount System

DESCRIPTION

LOCATION
A019P1XE01

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

WIRING DIAGRAM

A019OTGE03

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK VACUUM HOSES


    1. A019KTGE01
      Text in Illustration
      *1 Engine
      *2 Vacuum Switching Valve for ACM
      *3 Engine Mounting Insulator
      *4 ECM
      *5 Air Cleaner
      *6 Vacuum Tank
      *7 to Intake Air Control Valve Actuator

      If the hose is damaged, replace the vacuum hose assembly.

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


    NG

    REPAIR OR REPLACE VACUUM HOSES

    OK

  2. CHECK VACUUM


    1. A019M42

      Start the engine.

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

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

      OK
      Vacuum exists.

    4. Reconnect the vacuum hose.


    NG

    CHECK AND REPLACE VACUUM SOURCE AND HOSES

    OK

  3. INSPECT VACUUM SWITCHING VALVE FOR ACM (OPERATION)


    1. A019OJDE04

      Remove the vacuum switching valve for ACM.

    2. Check operation of the vacuum switching valve for ACM when battery voltage is applied to the terminals of the vacuum switching valve for ACM connector.

      Battery voltage is not applied
      The air from pipe G flows out through pipes E and H.
      Battery voltage is applied
      The air from pipe F flows out through pipes E and H.

    3. Reinstall the vacuum switching valve for ACM.


    NG

    REPLACE VACUUM SWITCHING VALVE FOR ACM Click here

    OK

  4. INSPECT VACUUM SWITCHING VALVE FOR ACM (RESISTANCE)


    1. A019L21E03
      Text in Illustration
      *1

      Component without harness connected

      (Vacuum Switching Valve for ACM)

      Disconnect the vacuum switching valve 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 vacuum switching valve for ACM connector.


    NG

    REPLACE VACUUM SWITCHING VALVE FOR ACM Click here

    OK

  5. INSPECT FRONT ENGINE MOUNTING INSULATOR


    1. A019NIH

      Disconnect the vacuum hose from the front engine mount insulator assembly.

    2. Using a vacuum pump, apply vacuum of 80 kPa (600 mmHg, 23.622 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 does not leak.

    5. Reconnect the vacuum hose.


    NG

    REPLACE FRONT ENGINE MOUNTING INSULATOR ASSEMBLY Click here

    OK

  6. INSPECT VACUUM SWITCHING VALVE FOR ACM (POWER SOURCE VOLTAGE)


    1. A019PF0E07
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Vacuum Switching Valve for ACM)

      Disconnect the vacuum switching valve for ACM 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
      D4-1 - Body ground Engine switch on (IG) 11 to 14 V

    4. Reconnect the vacuum switching valve for ACM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - VACUUM SWITCHING VALVE FOR ACM)

    OK

  7. CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE FOR ACM - ECM)


    1. Disconnect the vacuum switching valve for ACM connector.

      A019KBDE07

    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
      D4-2 - D1-83 (ACM) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D4-2 or D1-83 (ACM) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Vacuum Switching Valve for ACM)

      		 *2

      Front view of wire harness connector

      (to ECM)

    4. Reconnect the ECM connector.

    5. Reconnect the vacuum switching valve for ACM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (VACUUM SWITCHING VALVE FOR ACM - ECM)

    OK

    REPLACE ECM Click here