2008 INFINITI FX35 radiator

CO-52
< SERVICE INFORMATION >[VK45DE]
THERMOSTAT AND WATER CONTROL VALVE
THERMOSTAT AND WATER CONTROL VALVE
ComponentINFOID:0000000001325884
1. O-ring 2. Water outlet pipe 3. Thermostat housing
4. Radiator cap 5. Radiator hose (upper) 6. Water hose
7. Water hose 8. Water pipe 9. Water hose
10. Water hose 11. Thermostat 12. Rubber ring
13. Water inlet 14. Water suction hose 15. Water suction pipe
16. Radiator hose (lower) 17. Water hose 18. Water hose
19. O-ring 20. Heater pipe 21. Heater hose
22. Gasket 23. Water outlet 24. Water control valve
25. Rubber ring 26. O-ring 27. Water connector
28. Heater hose 29. Gasket
A. To radiator B. To oil cooler C. To cylinder block
PBIC4557E
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THERMOSTAT AND WATER CONTROL VALVECO-53
< SERVICE INFORMATION > [VK45DE]
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 Refer to
GI-8, "Component" for symbols in the figure.
Removal and InstallationINFOID:0000000001325885
REMOVAL
1. Drain engine coolant from drain plugs on radiat or and both side of cylinder block. Refer to CO-37, "Chang-
ing Engine Coolant" and EM-242, "Disassembly and Assembly".
CAUTION:
 Perform this step when engine is cold.
 Do not spill engine coolant on drive belts.
2. Remove engine cover with power tool. Refer to EM-169, "
Component".
3. Remove air duct (inlet). Refer to EM-173, "
Component".
4. Disconnect water suction hose from water inlet.
5. Remove water inlet and thermostat. CAUTION:
Do not disassemble thermostat.
6. Remove intake manifolds (upper and lower). Refer to EM-175, "
Component".
7. Disconnect radiator hose (upper) and wa ter hoses from thermostat housing.
8. Disconnect heater hoses from water outlet and heater pipe.
9. Remove thermostat housing, water outlet pipe, water connector, water control valve, water outlet and heater pipe.
CAUTION:
Do not disassemble water control valve.
INSPECTION AFTER REMOVAL
 Make sure that valves both in thermostat and water c ontrol valve are completely closing at normal tempera-
ture.
 Place a thread so that it is caught in the valves of the thermostat
and water control valve. Immerse fully in a container filled with
water. Heat while stirring. (The example in the figure shows ther-
mostat.)
 The valve opening temperature is the temperature at which the valve opens and falls from the thread.
 Continue heating. Check the maximum valve lift. NOTE:
The maximum valve lift standard temperature for water control
valve is the reference value.
 After checking the maximum valve lift, lower the water tempera-
ture and check the valve closing temperature.
Standard values:
 If the malfunctioning condition, when closing valve at nor mal temperature, or measured values are out of the
standard, replace thermostat and/or water control valve.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful not to spill engine coolant over en gine room. Use rag to absorb engine coolant.
Thermostat and Water Control Valve
D. To heater core E. To cylinder head (left bank) F. To cylinder head (right bank)
G. To intake manifold adapter
SLC252B
Thermostat Water control valve
Valve opening temperature 80 - 84 °C (176 - 183 °F) 93.5 - 96.5 °C (200 - 206 °F)
Maximum valve lift More than 10 mm/95
°C
(0.39 in/203 °F) More than 8 mm/108
°C
(0.315 in/226 °F)
Valve closing temperature 77 °C (171 °F) 90 °C (194 °F)
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CO-54
< SERVICE INFORMATION >[VK45DE]
THERMOSTAT AND WATER CONTROL VALVE
 Install thermostat and water control valve with the whole circumfer-
ence of each flange part fit securely inside rubber ring. (The exam-
ple in the figure shows thermostat.)
 Install thermostat with jiggle valve facing upwards. (The position deviation may be within the range of ±10 degrees)
 Install water control valve with the up-mark facing up and the frame
center part facing upwards. (The position deviation may be within
the range of ±10 degrees)
Water Outlet Pipe and Heater Pipe
First apply a neutral detergent to O-rings, then quickly insert the insertion parts of the water outlet pipe and
heater pipe into the installation holes.
INSPECTION AFTER INSTALLATION
 Check for leaks of engine coolant using radiator cap tester adapter (commercial service tool) and radiator
cap tester (commercial service tool). Refer to CO-37, "
Inspection".
 Start and warm up engine. Visually check if there is no leaks of engine coolant.
PBIC0157E
PBIC0158E
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

SERVICE DATA AND SPECIFICATIONS (SDS)
CO-55
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SERVICE DATA AND SPECIFICATIONS (SDS)
Standard and LimitINFOID:0000000001325886
ENGINE COOLANT CAPACITY (APPROXIMATE)
Unit: (US qt, Imp qt)
RADIATOR
Unit: kPa (kg/cm2, psi)
THERMOSTAT
WATER CONTROL VALVE
Engine coolant capacity [With reservoir tank at (“MAX” level)] 10.0 (10-5/8, 8-3/4)
Reservoir tank engine coolant capacity (at “MAX” level) 0.8 (7/8, 3/4)
Radiator cap relief pressure
Standard 78 - 98 (0.8 - 1.0, 11 - 14)
Limit 59 (0.6, 9)
Leakage testing pressure 157 (1.6, 23)
Valve opening temperature 80 - 84 °C (176 - 183 °F)
Maximum valve lift More than 10 mm/95 °C (0.39 in/203 °F)
Valve closing temperature 77 °C (171 °F)
Valve opening temperature 93.5 - 96.5 °C (200 - 206 °F)
Maximum valve lift More than 8 mm/108 °C (0.315 in/226 °F)
Valve closing temperature 90 °C (194 °F)
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TROUBLE DIAGNOSISEC-99
< SERVICE INFORMATION > [VQ35DE]
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1 - 6: The numbers refer to the order of inspection. Exhaust Exhaust manifold/Tube/Muffler/
Gasket 55555 55 5 EM-26
,
EX-
3Three way catalyst
Lubrica-
tion Oil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil cooler
55555 55 5 EM-30
,
LU-
15, LU-8,
LU-12
Oil level (Low)/Filthy oil LU-5
Cooling
Radiator/Hose/Radiator filler cap
55555 55 45 CO-13,
CO-16
Thermostat 5 CO-27
Water pumpCO-22
Water galleryCO-29
Cooling fan 5EC-210
Coolant level (Low)/Contaminat-
ed coolant5
CO-10
IVIS (Infiniti Vehicle Immobilizer System —
NATS) 11 EC-53 or
BL-185
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DTC P0125 ECT SENSOREC-205
< SERVICE INFORMATION > [VQ35DE]
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If “COOLAN TEMP/S” increases to more than 10
°C (50 °F) within 65 minutes, stop engine because
the test result will be OK.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-205, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III” above.
Diagnosis ProcedureINFOID:0000000001326031
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-144, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-205, "
Component Inspection".
OK or NG
OK >> GO TO 3.
NG >> Replace engine coolant temperature sensor.
3.CHECK THERMOSTAT OPERATION
When the engine is cold [lower than 70 °C (158 °F)] condition, grasp lower radiator hose and confirm the engine
coolant does not flow.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace thermostat. Refer to CO-27
.
4.CHECK INTERMITTENT INCIDENT
Refer to EC-139
.
Refer to EC-195, "
Wiring Diagram".
>> INSPECTION END
Component InspectionINFOID:0000000001326032
ENGINE COOLANT TEMPERATURE SENSOR
PBIB2625E
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DTC P1217 ENGINE OVER TEMPERATUREEC-439
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CAUTION:
When a malfunction is in
dicated, be sure to replace the coolant. Refer to CO-10, "
Changing Engine
Coolant". Also, replace the engine oil. Refer to LU-7, "Changing Engine Oil".
1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to
use coolant with the proper mixture ratio. Refer to MA-10, "
Anti-Freeze Coolant Mixture Ratio".
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.
Overall Function CheckINFOID:0000000001326294
Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be con-
firmed.
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-
sure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the ca p by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
WITH CONSULT-III
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool befo re checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-441,
"Diagnosis Procedure".
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-441,
"Diagnosis Procedure".
3. Turn ignition switch ON.
4. Perform “COOLING FAN” in “ACTIVE TEST” mode with CON-
SULT-III.
5. If the results are NG, go to EC-441, "
Diagnosis Procedure".
WITH GST
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool befo re checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-441,
"Diagnosis Procedure".
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-441,
"Diagnosis Procedure".
3. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to PG-20, "
Auto Active Test"
4. If NG, go to EC-441, "Diagnosis Procedure".
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1217
1217 Engine over tempera-
ture (Overheat)  Cooling fan does not operate properly (Over-
heat).
 Cooling fan system does not operate proper- ly (Overheat).
 Engine coolant level was not added to the
system using the proper filling method.
 Engine coolant is not within the specified range.  Harness or connectors
(Cooling fan circuit is open or shorted.)
 IPDM E/R
 Cooling fan
 Radiator hose
Radiator
Radiator cap
 Water pump
Thermostat
For more informat ion, refer to EC-445,
"Main 12 Causes of Overheating".
SEF621W
SEF621W
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EC-442
< SERVICE INFORMATION >[VQ35DE]
DTC P1217 ENGINE
OVER TEMPERATURE
No >> GO TO 3.
2.CHECK COOLING FAN OPERATION
With CONSULT-III
1. Start engine and let it idle.
2. Select “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III.
3. Make sure that cooling fans-1 and -2 operate at each speed (LOW/MID/HI).
OK or NG
OK >> GO TO 4.
NG >> Check cooling fan control circuit. (Go to “PROCEDURE B”.)
3.CHECK COOLING FAN OPERATION
Without CONSULT-III
1. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to PG-20, "
Auto Active
Te s t".
2. Make sure that cooling fans-1 and -2 operate at each speed (Low/Middle/High).
OK or NG
OK >> GO TO 4.
NG >> Check cooling fan control circuit. (Go to “PROCEDURE B”.)
4.CHECK COOLING SYSTEM FOR LEAK
Refer to CO-10, "
Inspection".
OK or NG
OK >> GO TO 5.
NG >> Check the following for leak. Hose
 Radiator
 Water pump
5.CHECK RADIATOR CAP
Refer to CO-14, "
Checking Radiator Cap".
OK or NG
OK >> GO TO 6.
NG >> Replace radiator cap.
6.CHECK THERMOSTAT
Refer to CO-27
.
OK or NG
OK >> GO TO 7.
NG >> Replace thermostat
7.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-197, "
Component Inspection".
OK or NG
OK >> GO TO 8.
NG >> Replace engine coolant temperature sensor.
8.CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to EC-445, "
Main 12 Causes of Overheating".
>> INSPECTION END
PROCEDURE B
1.CHECK COOLILNG FAN POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connectors E6.
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