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

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.

WIRING DIAGRAM

A01WTZLE04
*a from EFI MAIN NO. 1 relay
*b EFI NO. 2
*c VSV for Engine Mount

CAUTION / NOTICE / HINT

Tech Tips


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

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

PROCEDURE


  1. 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

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

  2. 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.

    NG

    REPLACE VACUUM HOSE

    OK

  3. INSPECT VSV FOR ENGINE MOUNT


    1. Inspect the VSV for engine mount Click here.


    NG

    REPLACE VSV FOR ENGINE MOUNT Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (VSV FOR ENGINE MOUNT - ECM)


    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
      Tester Connection Condition Specified Condition
      C91-2 - A85-52 (ACM) Always Below 1 Ω
      C91-2 or A85-52 (ACM) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT ENGINE MOUNTING INSULATOR FRONT


    1. Inspect the engine mounting insulator front Click here.


    OK

    REPLACE ECM Click here

    NG

    REPLACE ENGINE MOUNTING INSULATOR FRONT Click here