thermostat INFINITI FX35 2005 User Guide

CO-38
[VK45DE]
ENGINE COOLANT
Revision: 2005 July 2005 FX
2. Open radiator drain plug at the bottom of radiator, and then
remove radiator cap.
When draining all of engine coolant in the system, open water drain plugs on cylinder block. Refer
to EM-246, "
DISASSEMBLY" .
3. Remove reservoir tank as necessary, and drain engine coolant and clean reservoir tank before installing.
4. Check drained engine coolant for contaminants such as rust, corrosion or discoloration. If contaminated, flush the engine cooling system. Refer to CO-39, "
FLUSHING COOLING SYSTEM" .
REFILLING ENGINE COOLANT
1. Install reservoir tank, and radiator drain plug.
CAUTION:
Be sure to clean radiator drain plug and install with new O-ring.
If water drain plugs on cylinder block are removed, close and tighten them. Refer to EM-249,
"ASSEMBLY" .
2. Make sure that each hose clamp has been firmly tightened.
3. Remove air relief plug on heater hose.
4. Fill thermostat housing and reservoir tank to specified level.

Refill engine coolant up to filler neck of thermostat housing.

Pour engine coolant through engine coolant filler neck slowly of less than 2 (2-1/8 US qt, 1-3/4
Imp qt) a minute to allow air in system to escape.

Use Genuine Nissan Long Life Antifreeze/Coolant or equivalent mixed with water (distilled or
demineralized). Refer to MA-12, "
RECOMMENDED FLUIDS AND LUBRICANTS" .
SBIA0444E
Radiator drain plug:
: 1.19 N·m (0.12 kg-m, 11 in-lb)
PBIC1530E
Engine coolant capacity
(With reservoir tank at “MAX” level):
Approx. 10.0 (10-5/8 US qt, 8-3/4 Imp qt)

ENGINE COOLANT CO-39
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When engine coolant overflows air relief hole on heater hose,
install air relief plug.
5. Install radiator cap.
6. Warm up until opening thermostat. Standard for warming-up time is approximately 10 minutes at 3,000 rpm.

Make sure thermostat opening condition by touching radiator hose (lower) to see a flow of warm water.
CAUTION:
Watch water temperature gauge so as not to overheat engine.
7. Stop engine and cool down to less than approximately 50 °C (122 °F).

Cool down using a fan to reduce the time.

If necessary, refill engine coolant up to filler neck of thermostat housing.
8. Refill reservoir tank to “MAX” level line with engine coolant.
9. Repeat steps 4 through 7 two or more times with radiator cap installed until engine coolant level no longer drops.
10. Check cooling system for leaks with engine running.
11. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000 rpm with heater temperature controller set at several position between “COOL” and “WARM”.

Sound may be noticeable at heater unit.
12. Repeat step 11 three times.
13. If sound is heard, bleed air from cooling system by repeating steps 4 through 7 until engine coolant level no longer drops.
FLUSHING COOLING SYSTEM
1. Install reservoir tank, and radiator drain plug.
CAUTION:
Be sure to clean drain plug and install with new O-ring.
If water drain plugs on cylinder block are removed, close and tighten them. Refer to EM-249,
"ASSEMBLY" .
2. Remove air relief plug on heater hose.
3. Fill thermostat housing with water until water spills from the air relief hole, then close air relief plug. Fill thermostat housing and reservoir tank with water and reinstall radiator cap.
4. Run engine and warm it up to normal operating temperature. Reservoir tank engine coolant capacity
(At “MAX” level):
0.8 (7/8 US qt, 3/4 lmp qt)
SMA412B
Radiator drain plug:
: 1.19 N·m (0.12 kg-m, 11 in-lb)
PBIC1530E

THERMOSTAT AND WATER CONTROL VALVE CO-53
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THERMOSTAT AND WATER CONTROL VALVEPFP:21200
Removal and InstallationABS006JP
REMOVAL
1. Drain engine coolant from drain plugs on radiator and both side of cylinder block. Refer to CO-37, "Chang-
ing Engine Coolant" and EM-246, "DISASSEMBLY" .
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-172, "
ENGINE ROOM COVER" .
3. Remove air duct (inlet). Refer to EM-176, "
AIR CLEANER AND AIR DUCT" .
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-178, "
INTAKE MANIFOLD" .
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 23. Water hose 24. Water hose
PBIC1561E

CO-54
[VK45DE]
THERMOSTAT AND WATER CONTROL VALVE
Revision: 2005 July 2005 FX
7. Disconnect radiator hose (upper) and water 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 control valve are completely closing at normal tempar-
ature.

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 normal 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 engine room. Use rag to absorb engine coolant.
Thermostat and Water Control Valve

Install thermostat and water control valve with the whole circum-
ference of each flange part fit securely inside rubber ring. (The
example in the figure shows thermostat.)
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)
PBIC0157E

THERMOSTAT AND WATER CONTROL VALVE CO-55
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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 [SST: EG17650301 (J33984-A)] and
radiator cap tester (commercial service tool). Refer to CO-37, "
LEAK CHECK" .

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

CO-56
[VK45DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: 2005 July 2005 FX
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Standard and LimitABS006JQ
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)

EC-2Revision: 2005 July 2005 FX
Inspection Procedure ...........................................
.153
Diagnostic Procedure .......................................... .154
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT ...................................................................... .163
Description ........................................................... .163
Diagnostic Procedure .......................................... .163
POWER SUPPLY AND GROUND CIRCUIT .......... .164
Wiring Diagram .................................................... .164
Diagnostic Procedure .......................................... .165
Ground Inspection ............................................... .170
DTC U1000, U1001 CAN COMMUNICATION LINE .171
Description ........................................................... .171
On Board Diagnosis Logic ................................... .171
DTC Confirmation Procedure .............................. .171
Wiring Diagram .................................................... .172
Diagnostic Procedure .......................................... .173
DTC P0011, P0021 IVT CONTROL ....................... .174
Description ........................................................... .174
CONSULT-II Reference Value in Data Monitor Mode .174
On Board Diagnosis Logic ................................... .175
DTC Confirmation Procedure .............................. .175
Diagnostic Procedure .......................................... .176
Component Inspection ......................................... .177
Removal and Installation ..................................... .177
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .178
Description ........................................................... .178
CONSULT-II Reference Value in Data Monitor Mode .178
On Board Diagnosis Logic ................................... .178
DTC Confirmation Procedure .............................. .179
Wiring Diagram .................................................... .180
Diagnostic Procedure .......................................... .183
Component Inspection ......................................... .185
Removal and Installation ..................................... .185
DTC P0101 MAF SENSOR .................................... .186
Component Description ....................................... .186
CONSULT-II Reference Value in Data Monitor Mode .186
On Board Diagnosis Logic ................................... .186
DTC Confirmation Procedure .............................. .187
Overall Function Check ....................................... .188
Wiring Diagram .................................................... .189
Diagnostic Procedure .......................................... .190
Component Inspection ......................................... .193
Removal and Installation ..................................... .194
DTC P0102, P0103 MAF SENSOR ........................ .195
Component Description ....................................... .195
CONSULT-II Reference Value in Data Monitor Mode .195
On Board Diagnosis Logic ................................... .195
DTC Confirmation Procedure .............................. .196
Wiring Diagram .................................................... .197
Diagnostic Procedure .......................................... .198
Component Inspection ......................................... .201
Removal and Installation ..................................... .202
DTC P0112, P0113 IAT SENSOR .......................... .203
Component Description ....................................... .203
On Board Diagnosis Logic ................................... .203 DTC Confirmation Procedure ...............................
.203
Wiring Diagram .................................................... .205
Diagnostic Procedure ........................................... .206
Component Inspection ......................................... .207
Removal and Installation ...................................... .207
DTC P0117, P0118 ECT SENSOR ......................... .208
Component Description ....................................... .208
On Board Diagnosis Logic ................................... .208
DTC Confirmation Procedure ............................... .209
Wiring Diagram .................................................... .210
Diagnostic Procedure ........................................... .211
Component Inspection ......................................... .212
Removal and Installation ...................................... .212
DTC P0122, P0123 TP SENSOR ........................... .213
Component Description ....................................... .213
CONSULT-II Reference Value in Data Monitor Mode .213
On Board Diagnosis Logic ................................... .213
DTC Confirmation Procedure ............................... .214
Wiring Diagram .................................................... .215
Diagnostic Procedure ........................................... .216
Component Inspection ......................................... .219
Removal and Installation ...................................... .219
DTC P0125 ECT SENSOR ..................................... .220
Component Description ....................................... .220
On Board Diagnosis Logic ................................... .220
DTC Confirmation Procedure ............................... .221
Diagnostic Procedure ........................................... .221
Component Inspection ......................................... .222
Removal and Installation ...................................... .222
DTC P0127 IAT SENSOR ....................................... .223
Component Description ....................................... .223
On Board Diagnosis Logic ................................... .223
DTC Confirmation Procedure ............................... .223
Diagnostic Procedure ........................................... .224
Component Inspection ......................................... .225
Removal and Installation ...................................... .225
DTC P0128 THERMOSTAT FUNCTION ................ .226
On Board Diagnosis Logic ................................... .226
DTC Confirmation Procedure ............................... .226
Diagnostic Procedure ........................................... .226
Component Inspection ......................................... .227
Removal and Installation ...................................... .227
DTC P0138, P0158 HO2S2 .................................... .228
Component Description ....................................... .228
CONSULT-II Reference Value in Data Monitor Mode .228
On Board Diagnosis Logic ................................... .228
DTC Confirmation Procedure ............................... .229
Wiring Diagram .................................................... .230
Diagnostic Procedure ........................................... .233
Component Inspection ......................................... .235
Removal and Installation ...................................... .236
DTC P0139, P0159 HO2S2 .................................... .237
Component Description ....................................... .237
CONSULT-II Reference Value in Data Monitor Mode .237
On Board Diagnosis Logic ................................... .237
DTC Confirmation Procedure ............................... .238

EC-9
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. 885
On Board Diagnosis Logic .................................. . 885
DTC Confirmation Procedure .............................. . 886
Wiring Diagram ................................................... . 887
Diagnostic Procedure .......................................... . 890
Component Inspection ........................................ . 892
Removal and Installation ..................................... . 892
DTC P0101 MAF SENSOR ................................... . 893
Component Description ....................................... . 893
CONSULT-II Reference Value in Data Monitor Mode . 893
On Board Diagnosis Logic .................................. . 893
DTC Confirmation Procedure .............................. . 894
Overall Function Check ....................................... . 895
Wiring Diagram ................................................... . 896
Diagnostic Procedure .......................................... . 897
Component Inspection ........................................ . 900
Removal and Installation ..................................... . 901
DTC P0102, P0103 MAF SENSOR ....................... . 902
Component Description ....................................... . 902
CONSULT-II Reference Value in Data Monitor Mode . 902
On Board Diagnosis Logic .................................. . 902
DTC Confirmation Procedure .............................. . 903
Wiring Diagram ................................................... . 904
Diagnostic Procedure .......................................... . 905
Component Inspection ........................................ . 907
Removal and Installation ..................................... . 908
DTC P0112, P0113 IAT SENSOR .......................... . 909
Component Description ....................................... . 909
On Board Diagnosis Logic .................................. . 909
DTC Confirmation Procedure .............................. . 909
Wiring Diagram ................................................... .. 911
Diagnostic Procedure .......................................... . 912
Component Inspection ........................................ . 913
Removal and Installation ..................................... . 913
DTC P0117, P0118 ECT SENSOR ........................ . 914
Component Description ....................................... . 914
On Board Diagnosis Logic .................................. . 914
DTC Confirmation Procedure .............................. . 915
Wiring Diagram ................................................... . 916
Diagnostic Procedure .......................................... . 917
Component Inspection ........................................ . 919
Removal and Installation ..................................... . 919
DTC P0122, P0123 TP SENSOR .......................... . 920
Component Description ....................................... . 920
CONSULT-II Reference Value in Data Monitor Mode . 920
On Board Diagnosis Logic .................................. . 920
DTC Confirmation Procedure .............................. . 921
Wiring Diagram ................................................... . 922
Diagnostic Procedure .......................................... . 923
Component Inspection ........................................ . 926
Removal and Installation ..................................... . 926
DTC P0125 ECT SENSOR .................................... . 927
Component Description ....................................... . 927
On Board Diagnosis Logic .................................. . 927
DTC Confirmation Procedure .............................. . 928
Diagnostic Procedure .......................................... . 928 Component Inspection .........................................
.929
Removal and Installation ..................................... .929
DTC P0127 IAT SENSOR ...................................... .930
Component Description ....................................... .930
On Board Diagnosis Logic ................................... .930
DTC Confirmation Procedure .............................. .930
Diagnostic Procedure .......................................... .931
Component Inspection ......................................... .932
Removal and Installation ..................................... .932
DTC P0128 THERMOSTAT FUNCTION ................ .933
On Board Diagnosis Logic ................................... .933
DTC Confirmation Procedure .............................. .933
Diagnostic Procedure .......................................... .933
Component Inspection ......................................... .934
Removal and Installation ..................................... .934
DTC P0132, P0152 HO2S1 .................................... .935
Component Description ....................................... .935
CONSULT-II Reference Value in Data Monitor Mode .935
On Board Diagnosis Logic ................................... .935
DTC Confirmation Procedure .............................. .936
Wiring Diagram .................................................... .937
Diagnostic Procedure .......................................... .940
Component Inspection ......................................... .942
Removal and Installation ..................................... .943
DTC P0133, P0153 HO2S1 .................................... .944
Component Description ....................................... .944
CONSULT-II Reference Value in Data Monitor Mode .944
On Board Diagnosis Logic ................................... .944
DTC Confirmation Procedure .............................. .945
Overall Function Check ....................................... .946
Wiring Diagram .................................................... .947
Diagnostic Procedure .......................................... .950
Component Inspection ......................................... .954
Removal and Installation ..................................... .955
DTC P0134, P0154 HO2S1 .................................... .956
Component Description ....................................... .956
CONSULT-II Reference Value in Data Monitor Mode .956
On Board Diagnosis Logic ................................... .956
DTC Confirmation Procedure .............................. .957
Overall Function Check ....................................... .958
Wiring Diagram .................................................... .959
Diagnostic Procedure .......................................... .962
Component Inspection ......................................... .964
Removal and Installation ..................................... .965
DTC P0138, P0158 HO2S2 .................................... .966
Component Description ....................................... .966
CONSULT-II Reference Value in Data Monitor Mode .966
On Board Diagnosis Logic ................................... .966
DTC Confirmation Procedure .............................. .967
Wiring Diagram .................................................... .968
Diagnostic Procedure .......................................... .971
Component Inspection ......................................... .973
Removal and Installation ..................................... .974
DTC P0139, P0159 HO2S2 .................................... .975
Component Description ....................................... .975

TROUBLE DIAGNOSIS EC-107
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DTC Inspection Priority ChartABS006KP
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC U1000 and/or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-171
.
Priority Detected items (DTC)
1

U1000 U1001 CAN communication line

P0101 P0102 P0103 Mass air flow sensor

P0112 P0113 P0127 Intake air temperature sensor

P0117 P0118 P0125 Engine coolant temperature sensor

P0128 Thermostat function

P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor

P0181 P0182 P0183 Fuel tank temperature sensor

P0327 P0328 Knock sensor

P0335 Crankshaft position sensor (POS)

P0340 P0345 Camshaft position sensor (PHASE)

P0460 P0461 P0462 P0463 Fuel level sensor

P0500 Vehicle speed sensor

P0605 ECM

P0700 TCM

P0705 Park/Neutral position (PNP) switch

P1229 Sensor power supply

P1610 - P1615 NATS

P1706 Park/Neutral position (PNP) switch

P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor

TROUBLE DIAGNOSIS EC-113
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Revision: 2005 July 2005 FX
1 - 6: The numbers refer to the order of inspection. Va l v e
mecha-
nism Timing chain
55555 55 5 EM-64
Camshaft
EM-84
Intake valve timing controlEM-64
Intake valve
3 EM-100
Exhaust valve
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-
17 , LU-10 ,
LU-14
Oil level (Low)/Filthy oil LU-7
Cooling
Radiator/Hose/Radiator filler cap
55555 55 45 CO-14,
CO-17
Thermostat 5 CO-26
Water pumpCO-22
Water galleryCO-28
Cooling fan 5EC-226
Coolant level (Low)/Contami-
nated coolant 5
CO-11
IVIS (Infiniti Vehicle Immobilizer System —
NATS) 11
EC-53 or
BL-213
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