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Home >> Nissan-Datsun >> 2006 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1148 To P2A00 (Qr25DE) >> DTC P1217 Engine Over Temperature >> Diagnostic Procedure >> Notes
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Diagnostic Procedure: Notes

  1. INSPECTION START 

    Do you have CONSULT-II?

    Yes or No 

    Yes: GO TO  2.

    No: GO TO  4.

  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 and touch "LOW" on the CONSULT-II screen.
      3. Fig 1: CONSULT-II Display - ACTIVE TEST
      G04192098Courtesy of NISSAN MOTOR CO., U.S.A.
    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  .)

  3. CHECK COOLING FAN HIGH SPEED OPERATION 

    With CONSULT-II 

    1. Touch "HI" on the CONSULT-II screen.
    2. Make sure that cooling fans-1 and -2 operates at high speed.
      3. Fig 2: CONSULT-II Display - ACTIVE TEST
      G04192099Courtesy 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. Turn ignition switch OFF.
    2. Disconnect cooling fan relay-2 and relay-3.
    3. Start engine and let it idle.
    4. Set temperature lever at full cold position.
    5. Turn air conditioner switch ON.
    6. Turn blower fan switch ON.
      Fig 3: Identifying Cooling Fan Relays
      G04192100Courtesy of NISSAN MOTOR CO., U.S.A.
    7. Make sure that cooling fans-1 and -2 operate at low speed.
    Fig 4: Checking Cooling Fan Low Speed Operation
    G04192101Courtesy 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 and relay-3.
    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 fans-1 and -2 operates at high speed.
      7. Fig 5: Checking Cooling Fan High Speed Operation
      G04192102Courtesy 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 

    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.

    Fig 6: Applying Pressure To Cooling System With Tester
    G04192103Courtesy of NISSAN MOTOR CO., U.S.A.

    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 

    Apply pressure to cap with a tester.

    Fig 7: Applying Pressure To Cap With Tester
    G04192104Courtesy of NISSAN MOTOR CO., U.S.A.

    Radiator cap relief pressure: 

    59 - 98 kPa (0.6 -1.0 kg/cm 2  , 9 - 14 psi) 

    OK or NG 

    OK: GO TO  9.

    NG: Replace radiator cap.

  9. CHECK COMPONENT PARTS 

    Check the following.

    OK or NG 

    OK: GO TO  10.

    NG: Replace malfunctioning component.

  10. CHECK MAIN 12 CAUSES 

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

    : INSPECTION END 

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