Ecd System Active Control Engine Mount System


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER

CHECK VACUUM

INSPECT VSV FOR ENGINE MOUNT

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

INSPECT ENGINE MOUNTING INSULATOR FRONT

ECD SYSTEM - 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


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INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (LandCruiser RM0000012XK0ARX.html) and initialization (LandCruiser RM000000TIN08CX.html).
1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER

  1. Warm up the engine.

  1. Connect the intelligent tester to the DLC3.

  1. Move the shift lever to N or P.

  1. Enter the following menus: Powertrain / Engine / Active Test / Control the ACM Inhibit.

  1. 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 (LandCruiser RM000000PDQ18UX.html)
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 (LandCruiser RM00000463G005X.html).



NG
REPLACE VSV FOR ENGINE MOUNT
OK


4.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.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    C80-2 - C57-10 (ACM)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    C80-2 or C57-10 (ACM) - Body ground
    		Always
    		10 kΩ or higher

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

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    EFI NO. 2 fuse (2) - C80-1
    		Always
    		Below 1 Ω

  1. Reconnect the VSV for engine mount connector.

  1. Reconnect the ECM connector.

  1. Reinstall the EFI NO. 2 fuse.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.INSPECT ENGINE MOUNTING INSULATOR FRONT

  1. Inspect the engine mounting insulator front.



NG
REPLACE ENGINE MOUNTING INSULATOR FRONT (LandCruiser RM0000045F8014X.html)
OK

REPLACE ECM (LandCruiser RM0000013Z002CX.html)