Active Control Engine Mount System

2GR-FE ENGINE CONTROL: SFI SYSTEM: Active Control Engine Mount System
- Active Control Engine Mount System

DESCRIPTION

LOCATION





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

WIRING DIAGRAM





INSPECTION PROCEDURE

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

PROCEDURE

1. CHECK VACUUM HOSES

(a) If the hose is damaged, replace the vacuum hose assembly.





(b) Check the air and vacuum hoses for looseness, disconnection and blockage.

OK:

No looseness, disconnection or blockage.

Text in Illustration





NG -- REPAIR OR REPLACE VACUUM HOSES
OK -- Continue to next step.

2. CHECK VACUUM

(a) Start the engine.





(b) Disconnect the vacuum hose from the air cleaner cap.

(c) Check that the disconnected port located on the vacuum tank applies suction to your finger.

OK:

Vacuum exists.

NG -- CHECK AND REPLACE VACUUM SOURCE AND HOSES
OK -- Continue to next step.

3. INSPECT DUTY VACUUM SWITCHING VALVE (OPERATION)

(a) Inspect the duty vacuum switching valve Testing and Inspection.

NG -- REPLACE DUTY VACUUM SWITCHING VALVE Removal
OK -- Continue to next step.

4. INSPECT DUTY VACUUM SWITCHING VALVE (RESISTANCE)

(a) Inspect the duty vacuum switching valve Testing and Inspection.

NG -- REPLACE DUTY VACUUM SWITCHING VALVE Removal
OK -- Continue to next step.

5. INSPECT FRONT ENGINE MOUNTING INSULATOR ASSEMBLY (VACUUM LEAK)

(a) Inspect the front engine mounting insulator assembly Active Control Engine Mount.

NG -- REPLACE FRONT ENGINE MOUNTING INSULATOR ASSEMBLY Removal
OK -- Continue to next step.

6. INSPECT DUTY VACUUM SWITCHING VALVE (POWER SOURCE VOLTAGE)

(a) Disconnect the duty vacuum switching valve connector.





(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - DUTY VACUUM SWITCHING VALVE)
OK -- Continue to next step.

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

(a) Disconnect the duty vacuum switching valve connector.

(b) Disconnect the ECM connector.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal