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Home › Infiniti › 2006 › FX45 › Repair and Diagnosis › Engine Performance › System › Engine Control System - DTCS P1217 To P2A03 (VK45DE) › DTC P1217 Engine Over Temperature › Diagnostic Procedure NBS004CX › Notes

Diagnostic Procedure NBS004CX: Notes

  1. CHECK COOLING FAN (CRANKSHAFT DRIVEN) 
    1. Start engine and let id idle.
    2. Make sure that cooling fan (crankshaft driven) operates normally.

    OK or NG 

    OK (With CONSULT-II) : GO TO 2.

    OK (Without CONSULT-II) : GO TO  4.

    NG : Check cooling fan (crankshaft driven). Refer to "COOLING FAN ".

  2. CHECK COOLING FAN MIDDLE SPEED OPERATION 

    With CONSULT-II 

    1. Start engine and let it idle.
    2. Select "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-II, and touch "MID" on the CONSULT-II screen.
    3. Make sure that cooling fan operates.

    OK or NG 

    OK : GO TO 3.

    NG : Check cooling fan middle speed control circuit. (Go to "PROCEDURE A ".)

    Fig 1: CONSULT-II Screen Display - COOLING FAN In ACTIVE TEST Mode
    G04075103Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK COOLING FAN HIGH SPEED OPERATION 

    With CONSULT-II 

    1. Select "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-II and touch "HI" on the CONSULT-II screen.
    2. Make sure that cooling fan operates at higher speed than middle speed.

    OK or NG 

    OK : GO TO  6.

    NG : Check cooling fan high speed control circuit. (Go to "PROCEDURE B ".)

    Fig 2: CONSULT-II Screen Display - COOLING FAN In ACTIVE TEST Mode
    G04075104Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK COOLING FAN MIDDLE SPEED OPERATION 

    Without CONSULT-II 

    1. Disconnect engine coolant temperature sensor harness connector.
    2. Connect 200Ω resistor to engine coolant temperature sensor harness connector.
    3. Start engine and let it idle.
    4. Make sure that cooling fan operates.

    OK or NG 

    OK : GO TO 5.

    NG : Check cooling fan middle speed control circuit. (Go to "PROCEDURE A ".)

    Fig 3: Identifying 200Ω Resistor To Engine Coolant Temperature Sensor Harness Connector
    G04075105Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK COOLING FAN HIGH SPEED OPERATION 

    Without CONSULT-II 

    1. Disconnect 200Ω resister to the engine coolant temperature sensor harness connector.
    2. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
    3. Start engine and let it idle.
    4. Make sure that cooling fan operates at higher speed than middle speed.

    OK or NG 

    OK : GO TO 6.

    NG : Check cooling fan control circuit. (Go to "PROCEDURE B ".)

    Fig 4: Identifying 150Ω Resistor To Engine Coolant Temperature Sensor Harness Connector
    G04075106Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK COOLING SYSTEM FOR LEAK 

    Apply pressure to the cooling system with a tester, and check if the pressure drops.

    Testing pressure: 157 kPa (1.6 kg/cm 2  , 23 psi) 

    CAUTION: Higher than the specified pressure may cause radiator damage. Pressure should not drop.

    OK or NG 

    OK : GO TO 7.

    NG : Check the following for leak. Refer to "LEAK CHECK ".

    • Hose
    • Radiator
    • Water pump
    Fig 5: Identifying Cooling System For Leak
    G04075107Courtesy of NISSAN MOTOR CO., U.S.A.
  7. CHECK RADIATOR CAP 

    Apply pressure to cap with a tester.: Radiator cap relief pressure: 59 - 98 kPa (0.6 - 1.0 kg/cm2 , 9 - 14 psi)

    OK or NG 

    OK : GO TO 8.

    NG : Replace radiator cap.

    Fig 6: Identifying Radiator Cap
    G04075108Courtesy of NISSAN MOTOR CO., U.S.A.
  8. CHECK COMPONENT PARTS 

    Check the following.

    OK or NG 

    OK : GO TO 9.

    NG : Replace malfunctioning component.

  9. CHECK MAIN 13 CAUSES 

    If the cause cannot be isolated, go to "MAIN 13 CAUSES OF OVERHEATING ".

    : INSPECTION END 

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