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ECD SYSTEM (w/ DPF) Active Control Engine Mount System

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DTC Code DTC Name
  Active Control Engine Mount System
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DESCRIPTION

The Active Control Engine Mount (ACM) system decreases engine vibration at low engine speed using the VSV for engine mount. 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.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

  • After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).

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PROCEDURE


  1. Click here

    PERFORM ACTIVE TEST USING GTS


    1. Warm up the engine.

    2. Connect the GTS to the DLC3.

    3. Move the shift lever to N or P.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the ACM Inhibit.

    5. Hold the top part of the steering wheel, and turn the Active Test from OFF to ON. Check the engine vibration.

      Result
      Engine Vibration Proceed to
      Increases A
      Does not increase B

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    CHECK VACUUM


    1. Check if the vacuum hose cap is missing, if the hose is damaged, and if the air and vacuum hoses have looseness, disconnection or blockage.

      OK
      Vacuum hose cap is not missing and hoses are normal.

  3. Click here

    INSPECT VSV FOR ENGINE MOUNT


    1. Inspect the VSV for engine mount (Click here).


  4. Click here

    CHECK HARNESS AND CONNECTOR (VSV FOR ENGINE MOUNT - ECM, EFI NO. 2 FUSE - VSV FOR ENGINE MOUNT)


    1. Disconnect the VSV for engine mount connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Table 1. for LHD
      Tester Connection Condition Specified Condition
      C81-2 - A38-52 (ACM) Always Below 1 Ω
      C81-2 or A38-52 (ACM) - Body ground Always 10 kΩ or higher
      Table 2. for RHD
      Tester Connection Condition Specified Condition
      C81-2 - A52-52 (ACM) Always Below 1 Ω
      C81-2 or A52-52 (ACM) - Body ground Always 10 kΩ or higher
    4. A0156GDE01

      Remove the EFI NO. 2 fuse from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      EFI NO. 2 fuse (2) - C81-1 Always Below 1 Ω

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    INSPECT ENGINE MOUNTING INSULATOR FRONT


    1. Inspect the engine mounting insulator front (Click here).


  6. Click here

    CHECK FOR INTERMITTENT PROBLEMSClick here

  7. Click here

    REPLACE VACUUM HOSE

  8. Click here

    REPLACE VSV FOR ENGINE MOUNTClick here

  9. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. Click here

    REPLACE ENGINE MOUNTING INSULATOR FRONTClick here

  11. Click here

    REPLACE ECMClick here