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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 116 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (3 Of 3)) >> DTC/Circuit Diagnosis >> Electronic Controlled Engine Mount >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. 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?

    YES 

    GO TO STEP 7  .

    NO 

    GO TO STEP 2  .

  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?

    YES 

    GO TO STEP 3  .

    NO 

    Repair or replace vacuum hoses and vacuum gallery.

  3. 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?

    YES 

    GO TO STEP 5  .

    NO 

    GO TO STEP 4  .

  4. CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect fuse block (J/B) harness connector.
    3. Check the continuity between electronic controlled engine mount harness connector and fuse block (J/B) harness connector.
    Electronic controlled engine mount control solenoid valve Fuse block (J/B) Continuity
    Connector Terminal Connector Terminal
    F64 1 E28 1M Existed

    Is the inspection result normal?

    YES 

    Perform the trouble diagnosis for power supply circuit.

    NO 

    Repair or replace error-detected parts.

  5. 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?

    YES 

    GO TO STEP 6  .

    NO 

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

  6. 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?

    YES 

    GO TO STEP 7  .

    NO 

    Replace electronic controlled engine mount control solenoid valve. Refer to COMPONENT PARTS LOCATION .

  7. CHECK ELECTRONIC CONTROLLED ENGINE MOUNT

    1. Turn ignition switch OFF.
    2. Install vacuum pump (A) to electronic controlled engine mount WHITE-1 .
      G05868750Courtesy of NISSAN NORTH AMERICA, INC.
    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?

    YES 

    GO TO STEP 8  .

    NO 

    Replace electronic controlled engine mount.

  8. CHECK INTERMITTENT INCIDENT

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    Is the inspection result normal?

    YES 

    Replace intake manifold collector. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace error-detected parts.

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