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
INSPECTION PROCEDURE
Note
After replacing the ECM, the new ECM needs registration Click here and initialization Click here.
PROCEDURE
PERFORM ACTIVE TEST USING INTELLIGENT TESTER
Warm up the engine.
Connect the intelligent tester to the DLC3.
Move the shift lever to N or P.
Enter the following menus: Powertrain / Engine / Active Test / Control the ACM Inhibit.
Hold the top part of the steering wheel, and turn the Active Test from OFF to ON. Check the engine vibration.
Engine Vibration | Proceed to |
---|---|
Increases | A |
Does not increase | B |
A |
CHECK FOR INTERMITTENT PROBLEMS Click here |
B |
CHECK VACUUM
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 |
INSPECT VSV FOR ENGINE MOUNT
Inspect the VSV for engine mount Click here.
NG |
REPLACE VSV FOR ENGINE MOUNT |
OK |
CHECK HARNESS AND CONNECTOR (VSV FOR ENGINE MOUNT - ECM, EFI NO. 2 FUSE - VSV FOR ENGINE MOUNT)
Disconnect the VSV for engine mount connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open) | ||||||
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|
Standard Resistance (Check for Short) | ||||||
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|
Remove the EFI NO. 2 fuse from the engine room relay block.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
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|
Reconnect the VSV for engine mount connector.
Reconnect the ECM connector.
Reinstall the EFI NO. 2 fuse.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT ENGINE MOUNTING INSULATOR FRONT
Inspect the engine mounting insulator front.
NG |
REPLACE ENGINE MOUNTING INSULATOR FRONT Click here |
OK |
REPLACE ECM Click here