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HOMESERVICE MANUALSNISSAN-DATSUN2004ALTIMA S, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEM - 2.5LDTC P1217: ENGINE OVER TEMPERATUREDIAGNOSTIC PROCEDURENOTES
2004 Nissan-Datsun Altima S, Automatic

Diagnostic Procedure: Notes

2004 Nissan-Datsun Altima S, AutomaticSECTION Notes
  1. INSPECTION START 

    Do you have CONSULT-II?

    Yes or No

    1. Yes : GO TO 2.
    2. No : GO TO  3.
  2. CHECK COOLING FAN OPERATION 

    With CONSULT-II 

    1. Start engine and let it idle.
    2. Select "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-II.
    3. Make sure that cooling fans -1 and -2 operate at each speed (LOW/HI).

    OK or NG

    1. OK : GO TO  4.
    2. NG : Check cooling fan control circuit. (Go to "PROCEDURE A ".)
      Fig 1: Display CONSULT II (Active Test)
      G02884676Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK COOLING FAN OPERATION 

    Without CONSULT-II 

    1. Preform IPDM E/R auto active test and check cooling fan motors operation, refer to "AUTO ACTIVE TEST ".
    2. Make sure that cooling fans -1 and -2 operate at each speed (Low/High).

    OK or NG

    1. OK : GO TO 4.
    2. NG : Check cooling fan control circuit. (Go to "PROCEDURE A ".)
  4. 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

    1. OK : GO TO 5.
    2. NG : Check the following for leak. Refer to "CHECKING COOLING SYSTEM FOR LEAKS ".
      • Hose
      • Radiator
      • Water pump
        Fig 2: Applying Pressure To Cooling System With Tester
        G02884677Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK RADIATOR CAP 

    Apply pressure to cap with a tester.

    Radiator cap relief pressure: 59.98 kPa (0.6 - 1.0 kg/cm 2  , 9 - 14 psi) 

    OK or NG

    1. OK : GO TO 6.
    2. NG : Replace radiator cap.
      Fig 3: Applying Pressure To Radiator Cap With Tester
      G02884678Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK THERMOSTAT 
    1. Check valve seating condition at normal room temperatures.

      It should seat tightly. 

    2. Check valve opening temperature and valve lift.

      Valve opening temperature: 82°C (180°F) [standard] 

      Valve lift: More than 8 mm/95°C (0.31 in/203°F) 

    3. Check if valve is closed at 5°C (9°F) below valve opening temperature.

      For details, refer to "THERMOSTAT AND THERMOSTAT HOUSING ".

    OK or NG

    1. OK : GO TO 7.
    2. NG : Replace thermostat
      Fig 4: Checking Valve Opening Temperature & Valve Lift
      G02884679Courtesy of NISSAN MOTOR CO., U.S.A.
  7. CHECK ENGINE COOLANT TEMPERATURE SENSOR 

    Refer to "COMPONENT INSPECTION ".

    OK or NG

    1. OK : GO TO 8.
    2. NG : Replace engine coolant temperature sensor.
  8. CHECK MAIN 12 CAUSES 

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

    1. >> INSPECTION END 
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.