2007 INFINITI M35 radiator cap

THERMOSTAT AND WATER CONTROL VALVE
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Revision: 2007 April2007 M35/M45
THERMOSTAT AND WATER CONTROL VALVEPFP:21200
ComponentsNBS004RR

Refer to GI-11, "Components" for symbols in the figure.
Removal and InstallationNBS004RS
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-173, "ENGINE ROOM COVER" .
2. Remove engine cover with power tool. Refer to EM-179, "
INTAKE MANIFOLD" .
3. Remove air duct (inlet). Refer to EM-177, "
AIR CLEANER AND AIR DUCT" .
4. Drain engine coolant from drain plugs on radiator and both side of cylinder block. Refer to CO-40, "
Chang-
ing Engine Coolant" and EM-253, "DISASSEMBLY" .
CAUTION:

Perform this step when engine is cold.

Do not spill engine coolant on drive belts.
1. Water connector 2. O-ring 3. Rubber ring
4. Heater hose 5. Water control valve 6. Water outlet
7. Gasket 8. O-ring 9. Water outlet pipe
10. Thermostat housing 11. Radiator cap 12. Radiator hose (upper)
13. Thermostat 14. Rubber ring 15. Water inlet
16. Water suction hose 17. Water suction pipe 18. Radiator hose (lower)
19. Gasket 20. O-ring 21. Heater pipe
22. Heater hose
A. To radiator B. To intake manifold adapter C. To cylinder block
D. To cylinder head (right bank) E. To cylinder head (left bank) F. To heater core
PBIC3306E

THERMOSTAT AND WATER CONTROL VALVE
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Revision: 2007 April2007 M35/M45

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-40, "
LEAK CHECK" .

Start and warm up engine. Visually check if there is no leaks of engine coolant.
PBIC0158E

CO-58
[VK45DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: 2007 April2007 M35/M45
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Standard and LimitNBS004RT
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) 10.4 (11, 9-1/8)
Reservoir tank engine coolant capacity (at “MAX” level) 0.8 (7/8, 3/4)
Radiator cap relief pressureStandard 78 - 98 (0.8 - 1.0, 11 - 14)
Limit 59 (0.6, 9)
Leakage testing pressure 157 (1.6, 23)
ThermostatStandard
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)
Water control valveStandard
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)

EC-28
[VQ35DE]
PREPARATION
Revision: 2007 April2007 M35/M45
PREPARATIONPFP:00002
Special Service ToolsNBS004S0
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
EG17650301
(J-33984-A)
Radiator cap tester
adapterAdapting radiator cap tester to radiator cap and
radiator filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
KV10117100
(J-36471-A)
Heated oxygen
sensor wrenchLoosening or tightening heated oxygen sensor 2
with 22 mm (0.87 in) hexagon nut
(J-44626)
Air fuel ratio (A/F)
sensor wrenchLoosening tightening air fuel ratio (A/F) sensor 1
KV10114400
(J-38365)
Heated oxygen
sensor wrenchLoosening or tightening air fuel ratio (A/F) sensor
1
a: 22 mm (0.87 in)
(J-44321)
Fuel pressure gauge
kitChecking fuel pressure
KV109E0010
(J-46209)
Break-out boxMeasuring the ECM signals with a circuit tester
KV109E0080
(J-45819)
Y-cable adapterMeasuring the ECM signals with a circuit tester
S-NT564
S-NT379
LEM054
S-NT636
LEC642
S-NT825
S-NT826

EC-102
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
1 - 6: The numbers refer to the order of inspection.Exhaust Exhaust manifold/Tube/Muffler/
Gasket
55555 55 5EM-28
, EX-
3Three way catalyst
Lubrica-
tionOil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil cooler
55555 55 5EM-31
, LU-
19 , LU-11 ,
LU-15
Oil level (Low)/Filthy oilLU-7
Cooling
Radiator/Hose/Radiator filler cap
55555 55 45CO-14,
CO-18
Thermostat 5CO-29
Water pumpCO-24
Water galleryCO-31
Cooling fan
5CO-22
Coolant level (Low)/Contami-
nated coolantCO-11
IVIS (INFINITI Vehicle Immobilizer System —
NATS)11EC-53 or
BL-244
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

EC-500
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DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2007 April2007 M35/M45
Cooling Fan Motor
Cooling fan motor receives cooling fan motor operating voltage from
cooling fan control module (1). The revolution speed of cooling fan
motor is controlled by duty cycle of the voltage.

: Vehicle front

Cooling fan motor-1 (2)

Cooling fan motor-2 (3)
CONSULT-II Reference Value in Data Monitor ModeNBS00533
Specification data are reference values.
On Board Diagnosis LogicNBS00534
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
indicated.
This self-diagnosis has the one trip detection logic.
CAUTION:
When a malfunction is indicated, be sure to replace the coolant. Refer to CO-11, "
Changing Engine
Coolant" . Also, replace the engine oil. Refer to LU-9, "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-13, "
Anti-Freeze Coolant Mixture Ratio" .
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.
Overall Function CheckNBS00535
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 cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
PBIB3352E
MONITOR ITEM CONDITION SPECIFICATION
FA N DU T Y

Engine: Running 0 - 100%
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1217
1217Engine over tempera-
ture (Overheat)

Cooling fan does not operate properly (Over-
heat).

Cooling fan system does not operate prop-
erly (Overheat).

Engine coolant was not added to the system
using the proper filling method.

Engine coolant is not within the specified
range.

Harness or connectors
(The cooling fan circuit is open or
shorted.)

IPDM E/R

Cooling fan control module

Cooling fan motor

Radiator hose

Radiator

Radiator cap

Water pump

Thermostat
For more information, refer to EC-507,
"Main 12 Causes of Overheating" .

EC-504
[VQ35DE]
DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2007 April2007 M35/M45
Diagnostic ProcedureNBS00537
1. CHECK COOLING FAN OPERATION
With CONSULT-II
1. Turn ignition switch ON.
2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with
CONSULT-II.
3. Make sure that cooling fan speed varies according to the per-
cent.
Without CONSULT-II
1. Perform IPDM E/R auto active test and check cooling fan motors
operation, refer to PG-23, "
Auto Active Test" .
2. Make sure that cooling fan operates.
OK or NG
OK >> GO TO 2.
NG >> GO TO 5.
2. CHECK COOLING SYSTEM FOR LEAK
Refer to CO-11, "
LEAK CHECK"
OK or NG
OK >> GO TO 3.
NG >> Check the following for leak.

Hose

Radiator

Water pump
3. CHECK COMPONENT PARTS
Check the following.

Radiator cap. Refer to CO-16, "Checking Radiator Cap" .

Thermostat. Refer to CO-29, "WATER INLET AND THERMOSTAT ASSEMBLY" .

Engine coolant temperature sensor. Refer to EC-218, "Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Replace malfunctioning component.
4. CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to EC-507, "
Main 12 Causes of Overheating" .
>>INSPECTION END
PBIB2737E

DTC P1217 ENGINE OVER TEMPERATURE
EC-507
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Revision: 2007 April2007 M35/M45
12. DETECT MALFUNCTIONING PART
Check the following.

10A fuse

Fuse block (J/B) connector E102

50A fusible link

Harness for open or short between cooling fan relay and fuse

Harness for open or short between cooling fan relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
13. CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E9.
3. Check harness continuity between the following;
Cooling fan relay terminal 2 and IPDM E/R terminal 56,
Cooling fan relay terminal 5 and cooling fan control module terminal 3.
Refer to wiring diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 14.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
14. CHECK COOLING FAN RELAY
Refer to EC-509, "
Component Inspection" .
OK or NG
OK >> GO TO 15.
NG >> Replace cooling fan relay.
15. CHECK INTERMITTENT INCIDENT
Perform EC-153, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace IPDM E/R. Refer to PG-18, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MOD-
ULE ENGINE ROOM)" .
NG >> Repair or replace harness connectors.
Main 12 Causes of OverheatingNBS00538
Continuity should exist.
Engine Step Inspection item Equipment Standard Reference page
OFF 1

Blocked radiator

Blocked condenser

Blocked radiator grille

Blocked bumper

Visual No blocking —
2

Coolant mixture
Coolant tester 50 - 50% coolant mixtureMA-13, "Anti-Freeze
Coolant Mixture Ratio"
3
Coolant level
Visual Coolant up to MAX level
in reservoir tank and radi-
ator filler neckMA-15, "Changing
Engine Coolant"
4
Radiator cap
Pressure tester 59 - 98 kPa
(0.6 - 1.0 kg/cm2 , 9 - 14
psi) (Limit)CO-16, "
Checking Radia-
tor Cap"