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Home >> Infiniti >> 2008 >> EX35 Base, RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS P1217 To P2A03 >> P1217 Engine Over Temperature >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK COOLING FAN OPERATION

    With CONSULT-III 

    1. Turn ignition switch ON.
    2. Perform "FAN DUTY CONTROL" in "ACTIVE TEST" mode with CONSULT-III.
    3. Check that cooling fan speed varies according to the percent.

    Without CONSULT-III 

    1. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to "DIAGNOSIS DESCRIPTION ".
    2. Check that cooling fan operates.

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Go to "DIAGNOSIS PROCEDURE ".

  2. CHECK COOLING SYSTEM FOR LEAK-I

    Check cooling system for leak. Refer to "INSPECTION ".

    Is leakage detected? 

    YES: GO TO 3.

    NO: GO TO  4.

  3. CHECK COOLING SYSTEM FOR LEAK-II

    Check the following for leak.

    • Hose
    • Radiator
    • Water pump

    Repair or replace malfunctioning part.

  4. CHECK RADIATOR CAP

    Check radiator cap. Refer to "RADIATOR CAP : INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 5.

    NO: Replace radiator cap.

  5. CHECK THERMOSTAT

    Check thermostat. Refer to "INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 6.

    NO: Replace thermostat

  6. CHECK ENGINE COOLANT TEMPERATURE SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Replace engine coolant temperature sensor.

  7. CHECK MAIN 12 CAUSES

    If the cause cannot be isolated, check the following.

    DIAGNOSTIC PROCEDURE

    Engine Step Inspection item Equipment Standard Reference
    OFF 1
    • Blocked radiator
    • Blocked condenser
    • Blocked radiator grille
    • Blocked bumper
    • Visual
    		 No blocking -
    2
    • Coolant mixture
    • Coolant tester
    		 50 - 50% coolant mixture -
    3
    • Coolant level
    • Visual
    		 Coolant up to MAX level in reservoir tank and radiator filler neck "INSPECTION "
    4
    • Radiator cap
    • Pressure tester
    		 107 kPa (1.1 kg/cm2 , 16 psi) (Limit) "RADIATOR CAP : INSPECTION "
    ON(2) 5
    • Coolant leaks
    • Visual
    		 No leaks "INSPECTION "
    ON(2) 6
    • Thermostat
    • Touch the upper and lower radiator hoses
    		 Both hoses should be hot "INSPECTION "
    ON(1) 7
    • Cooling fan
    • CONSULT-III
    		 Operating "COMPONENT FUNCTION CHECK "
    OFF 8
    • Combustion gas leak
    • Color checker chemical tester 4 Gas analyzer
    		 Negative -
    ON(3) 9
    • Coolant temperature gauge
    • Visual
    		 Gauge less than 3/4 when driving -
    • Coolant overflow to reservoir tank
    • Visual
    		 No overflow during driving and idling "INSPECTION "
    OFF(4) 10
    • Coolant return from reservoir tank to radiator
    • Visual
    		 Should be initial level in reservoir tank "INSPECTION "
    OFF 11
    • Cylinder head
    • Straight gauge feeler gauge
    		 0.1 mm (0.004 in) Maximum distortion (warping) "INSPECTION "
    12
    • Cylinder block and pistons
    • Visual
    		 No scuffing on cylinder walls or piston "INSPECTION "
    (1) Turn the ignition switch ON.
    (2) Engine running at 3, 000 rpm for 10 minutes.
    (3) Drive at 90 km/h (56 MPH) for 30 minutes and then let idle for 10 minutes.
    (4) After 60 minutes of cool down time.

    For more information, refer to "TROUBLESHOOTING CHART ".

    INSPECTION END

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