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Home >> Nissan-Datsun >> 2009 >> 350Z Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0643 To P2A03 >> DTC P1217 Engine Over Temperature >> Diagnosis Procedure >> Notes

Diagnosis Procedure: Notes

  1. INSPECTION START

    Do you have CONSULT-III?

    Yes or No 

    Yes: GO TO 2.

    No: GO TO  4.

  2. CHECK COOLING FAN LOW SPEED OPERATION

    With CONSULT-III 

    1. Start engine and let it idle.
    2. Select "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-III and touch "LOW" on the CONSULT-III screen.
    3. Make sure that cooling fans-1 and -2 operate at low speed.

      OK or NG 

      OK: GO TO 3.

      NG: Check cooling fan low speed control circuit. (Refer to "PROCEDURE A ").

  3. CHECK COOLING FAN HIGH SPEED OPERATION

    With CONSULT-III 

    1. Touch "HIGH" on the CONSULT-III screen.
    2. Make sure that cooling fans-1 and -2 operate at higher speed than low speed.

      OK or NG 

      OK: GO TO  6.

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

  4. CHECK COOLING FAN LOW SPEED OPERATION

    Without CONSULT-III 

    1. Start engine and let it idle.
    2. Turn air conditioner switch ON.
    3. Turn blower fan switch ON.
    4. Make sure that cooling fans-1 and -2 operate at low speed.

      OK or NG 

      OK: GO TO 5.

      NG: Check cooling fan low speed control circuit. (Refer to "PROCEDURE A ").

      Fig 1: Identifying Cooling Fan
      G04875331Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK COOLING FAN HIGH SPEED OPERATION

    Without CONSULT-III 

    1. Turn ignition switch OFF.
    2. Turn air conditioner switch and blower fan switch OFF.
    3. Disconnect engine coolant temperature sensor harness connector.
    4. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
    5. Restart engine and make sure that cooling fans-1 and -2 operate at higher speed than low speed.

      OK or NG 

      OK: GO TO 6.

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

      Fig 2: Identifying Engine Coolant Temperature Harness Connector
      G04875336Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK COOLING SYSTEM FOR LEAK

    Refer to INSPECTION .

    OK or NG 

    OK: GO TO 7.

    NG: Check the following for leak.

    • Hose
    • Radiator
    • Water pump
  7. CHECK RADIATOR CAP

    Refer to CHECKING RADIATOR CAP .

    OK or NG 

    OK: GO TO 8.

    NG: Replace radiator cap.

  8. CHECK THERMOSTAT

    Refer to WATER INLET AND THERMOSTAT ASSEMBLY .

    OK or NG 

    OK: GO TO 9.

    NG: Replace thermostat

  9. CHECK ENGINE COOLANT TEMPERATURE SENSOR

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 10.

    NG: Replace engine coolant temperature sensor.

  10. CHECK MAIN 12 CAUSES

    If the cause cannot be isolated, refer to "MAIN 12 CAUSES OF OVERHEATING ".

    INSPECTION END 

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