Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Nissan-Datsun >> 2006 >> Sentra Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0850 To P2A00 (QG18DE) >> DTC P1217 Engine Over Temperature >> Diagnostic Procedure >> Notes

Diagnostic Procedure: Notes

  1. INSPECTION START 

    Do you have CONSULT-II?

    Yes or No 

    Yes: GO TO  2.

    No: GO TO  4.

    2. Fig 1: Locating Cooling Fan Relay 1 And 2
    G04191320Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK COOLING FAN LOW SPEED OPERATION 

    With CONSULT-II 

    1. Turn ignition switch ON.
    2. Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-II.
    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. (Go to "PROCEDURE A ".)

    Fig 2: CONSULT II Display - Active Test
    G04075097Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK COOLING FAN HIGH SPEED OPERATION 

    With CONSULT-II 

    1. Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-II.
    2. Make sure that cooling fan-1 operates at high speed.
    Fig 3: CONSULT II Display - Active Test
    G04075097Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  6.

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

  4. CHECK COOLING FAN LOW SPEED OPERATION 

    Without CONSULT-II 

    1. Disconnect cooling fan relay-2.
    2. Start engine and let it idle.
    3. Set temperature lever at full cold position.
    4. Turn air conditioner switch ON.
    5. Turn blower fan switch ON.
      Fig 4: Locating Cooling Fan Relay 1 And 2
      G04191323Courtesy of NISSAN MOTOR CO., U.S.A.
    6. Make sure that cooling fans-1 and -2 operate at low speed.
      7. Fig 5: Checking Fan Operation At Low Speed
      G04191324Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  5.

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

  5. CHECK COOLING FAN HIGH SPEED OPERATION 

    Without CONSULT-II 

    1. Turn ignition switch OFF.
    2. Reconnect cooling fan relay-2.
    3. Turn air conditioner switch and blower fan switch OFF.
    4. Disconnect engine coolant temperature sensor harness connector.
    5. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
    6. Restart engine and make sure that cooling fan-1 operates at high speed.
    Fig 6: Checking Fan Operation At High Speed
    G04191325Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  6.

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

  6. CHECK COOLING SYSTEM FOR LEAK 

    Refer to "CHECKING COOLING SYSTEM FOR LEAKS ".

    OK or NG 

    OK: GO TO  8.

    NG: GO TO  7.

  7. DETECT MALFUNCTIONING PART 

    Check the following for leak.

    • Hose
    • Radiator
    • Water pump (Refer to "WATER PUMP ".)

    : Repair or replace.

  8. CHECK RADIATOR CAP 

    Refer to "CHECKING RADIATOR CAP ".

    OK or NG 

    OK: GO TO  9.

    NG: Replace radiator cap.

  9. CHECK THERMOSTAT 

    Refer to "THERMOSTAT AND THERMOSTAT HOUSING ".

    OK or NG 

    OK: GO TO  10.

    NG: Replace thermostat.

  10. CHECK ENGINE COOLANT TEMPERATURE SENSOR 

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO  11.

    NG: Replace engine coolant temperature sensor.

  11. CHECK MAIN 12 CAUSES 

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

    : INSPECTION END 

scientia non olet · About Mike's Workshop Manuals