SFI SYSTEM > 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 a 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


A202816E02


INSPECTION PROCEDURE

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

1.INSPECT VACUUM HOSE SUB-ASSEMBLY

  1. Inspect if the vacuum hose is damaged, loose, disconnected, or blocked.

    OK:
    Vacuum hose is connected correctly and is not damaged.



NG
REPLACE VACUUM HOSE SUB-ASSEMBLY
OK


2.INSPECT ACTIVE CONTROL ENGINE MOUNT VSV

  1. Inspect the active control engine mount VSV (Click here).



NG
REPLACE ACTIVE CONTROL ENGINE MOUNT VSV (Click here)
OK


3.CHECK HARNESS AND CONNECTOR (ACTIVE CONTROL ENGINE MOUNT VSV - ECM - INTEGRATION RELAY)
A107919E36

  1. Disconnect the active control engine mount VSV 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
    B47-2 - B8-38 (ACM)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    B47-2 or B8-38 (ACM) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector:
    (to active control engine mount VSV)
    *2
    		Front view of wire harness connector:
    (to ECM)



    A201267E02

  1. Remove the integration relay from the engine room relay block.

  1. Disconnect the active control engine mount VSV connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B47-1 - 1E-5
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Front view of wire harness connector:
    (to active control engine mount VSV)
    *2
    		Front view of wire harness connector:
    (to Integration relay)

  1. Reconnect the active control engine mount VSV connector.

  1. Reconnect the ECM connector.

  1. Install the integration relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT ENGINE MOUNTING INSULATOR FRONT

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



NG
REPLACE ENGINE MOUNTING INSULATOR FRONT (Click here)
OK

REPLACE ECM (Click here)