Nissan Murano: Dtc/circuit Diagnosis / Electronic Controlled Engine Mount

Component Function Check

CHECK OVERALL FUNCTION

1. Start engine and warm it up to normal operating temperature.

2. Shift selector position is D while depressing the brake pedal and parking brake pedal.

3. Disconnect electronic controlled engine mount control solenoid valve harness connector.

4. Check that body vibration increases compared to the condition of step 2 above (with Nissan Murano vehicle stopped).

Is the inspection result normal?

INSPECTION END

Diagnosis Procedure.

CHECK VACUUM SOURCE

1. Turn ignition switch OFF.

2. Reconnect electronic controlled engine mount control solenoid valve harness connector.

3. Disconnect vacuum hose connected to electronic controlled engine mount.

4. Start engine and let it idle.

5. Check vacuum hose for vacuum existence.

   Vacuum should exist.

Is the inspection result normal?

GO TO 7.

GO TO 2.

CHECK VACUUM HOSES AND VACUUM GALLERY

1. Turn ignition switch OFF.

2. Check vacuum hoses and vacuum gallery for clogging, cracks or improper connection. Refer to System Description.

Is the inspection result normal?

GO TO 3.

Repair or replace vacuum hoses and vacuum gallery.

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE POWER SUPPLY

1. Disconnect electronic controlled engine mount control solenoid valve harness connector.

2. Turn ignition switch ON.

3. Check the voltage between front electronic controlled engine mount harness connector and ground.

   Electronic controlled engine mount control solenoid valve		Ground	Voltage
   Connector	Terminal
   F64	1	Ground	Battery voltage

Is the inspection result normal?

GO TO 4.

Repair open circuit, short to ground or short to power in harness connectors.

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Disconnect ECM harness connector.

2. Check the continuity between ECM harness connector and electronic controlled engine mount control solenoid valve harness connector.

   ECM		Electronic controlled engine mount control solenoid valve		Continuity
   Connector	Terminal	Connector	Terminal
   F78	49	F64	2	Existed

3. Also check harness for short to ground and short to power.

Is the inspection result normal?

GO TO 5.

Repair open circuit, short to ground or short to power in harness connectors.

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE

Check electronic controlled engine mount control solenoid valve. Refer to Component Inspection.

Is the inspection result normal?

GO TO 6.

Replace electronic controlled engine mount control solenoid valve. Refer to Component Parts Location.

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT

1. Turn ignition switch OFF.

2. Install vacuum pump (A) to electronic controlled engine mount .

   

3. Check that a vacuum is maintained when applying the vacuum of -40 kPa (-0.41 kg/cm², -5.8 psi) to electronic controlled engine mount.

4. Also visually check electronic controlled engine mount.

Is the inspection result normal?

GO TO 7.

Replace electronic controlled engine mount.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to Intermittent Incident.

Is the inspection result normal?

Replace intake manifold collector. Refer to Removal and Installation.

Repair or replace error-detected parts.

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE

With CONSULT

1. Turn ignition switch OFF.

2. Reconnect electronic controlled engine mount control solenoid valve harness connector.

3. Disconnect vacuum hoses connected to electronic controlled engine mount control solenoid valve.

4. Turn ignition switch ON.

5. Select “ENGINE MOUNTING” in “ACTIVE TEST” mode with CONSULT.

6. Check air passage continuity and operation delay time under the following conditions.

   

   Condition (ENGINE MOUNTING)	Air passage continuity between and	Air passage continuity between and
   TRVL	Existed	Not existed
   IDLE	Not existed	Existed

Without CONSULT

1. Turn ignition switch OFF.

2. Disconnect electronic controlled engine mount control solenoid valve harness connector.

3. Disconnect vacuum hoses connected to electronic controlled engine mount control solenoid valve.

4. Check air passage continuity and operation delay time under the following conditions.

   

   Condition	Air passage continuity between and	Air passage continuity between and
   12 V direct current supply between terminals 1 and 2	Existed	Not existed
   No supply	Not existed	Existed

Is the inspection result normal?

INSPECTION END

Replace electronic controlled engine mount control solenoid valve. Refer to Component Parts Location.