2004 INFINITI FX35 heating

CO-8
[VQ35DE]
OVERHEATING CAUSE ANALYSIS
Revision: 2004 November 2004 FX35/FX45
Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
— Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper —
— Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser
Blocked air flow
Installed large fog lamp Symptom Check items

CO-32
[VK45DE]
OVERHEATING CAUSE ANALYSIS
Revision: 2004 November 2004 FX35/FX45
OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartABS006JF
Symptom Check items
Cooling sys-
tem parts
malfunctionPoor heat transferWater pump malfunction Worn or loose drive belt
— Thermostat stuck closed —
Damaged finsDust contamination or
paper clogging
Physical damage
Clogged radiator cooling
tubeExcess foreign material
(rust, dirt, sand, etc.)
Reduced air flowCooling fan does not oper-
ate
Fan assembly — High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud — — —
Improper engine coolant
mixture ratio—— —
Poor engine coolant quality — Engine coolant density —
Insufficient engine coolantEngine coolant leaksCooling hoseLoose clamp
Cracked hose
Water pump Poor sealing
Radiator capLoose
Poor sealing
RadiatorO-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tankExhaust gas leaks into
cooling systemCylinder head deterioration
Cylinder head gasket dete-
rioration

OVERHEATING CAUSE ANALYSIS
CO-33
[VK45DE]
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CO
Revision: 2004 November 2004 FX35/FX45
Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
— Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper —
— Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser
Blocked air flow
Installed large fog lamp Symptom Check items

CO-52
[VK45DE]
THERMOSTAT AND WATER CONTROL VALVE
Revision: 2004 November 2004 FX35/FX45
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 to the following, and install in the reverse order of removal.
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 liftMore 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

EC-5
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ECA
Revision: 2004 November 2004 FX35/FX45Component Inspection ......................................... 414
Removal and Installation ...................................... 414
DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR ............................................................ 415
Component Description ........................................ 415
On Board Diagnosis Logic ................................... 415
DTC Confirmation Procedure ............................... 415
Diagnostic Procedure ........................................... 416
DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION .............................................................. 417
Description ........................................................... 417
On Board Diagnosis Logic ................................... 417
DTC Confirmation Procedure ............................... 417
Wiring Diagram .................................................... 418
Diagnostic Procedure ........................................... 419
Component Inspection ......................................... 422
Removal and Installation ...................................... 422
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY .................................................................... 423
Component Description ........................................ 423
CONSULT-II Reference Value in Data Monitor Mode
. 423
On Board Diagnosis Logic ................................... 423
DTC Confirmation Procedure ............................... 423
Wiring Diagram .................................................... 425
Diagnostic Procedure ........................................... 426
DTC P1128 THROTTLE CONTROL MOTOR ........ 428
Component Description ........................................ 428
On Board Diagnosis Logic ................................... 428
DTC Confirmation Procedure ............................... 428
Wiring Diagram .................................................... 429
Diagnostic Procedure ........................................... 430
Component Inspection ......................................... 431
Removal and Installation ...................................... 432
DTC P1143, P1163 HO2S1 ..................................... 433
Component Description ........................................ 433
CONSULT-II Reference Value in Data Monitor Mode
. 433
On Board Diagnosis Logic ................................... 433
DTC Confirmation Procedure ............................... 434
Overall Function Check ........................................ 435
Diagnostic Procedure ........................................... 435
Component Inspection ......................................... 437
Removal and Installation ...................................... 438
DTC P1144, P1164 HO2S1 ..................................... 439
Component Description ........................................ 439
CONSULT-II Reference Value in Data Monitor Mode
. 439
On Board Diagnosis Logic ................................... 439
DTC Confirmation Procedure ............................... 440
Overall Function Check ........................................ 441
Diagnostic Procedure ........................................... 441
Component Inspection ......................................... 443
Removal and Installation ...................................... 445
DTC P1146, P1166 HO2S2 ..................................... 446
Component Description ........................................ 446
CONSULT-II Reference Value in Data Monitor Mode
. 446
On Board Diagnosis Logic ................................... 446DTC Confirmation Procedure ...............................447
Overall Function Check ........................................447
Wiring Diagram .....................................................449
Diagnostic Procedure ...........................................452
Component Inspection ..........................................454
Removal and Installation ......................................456
DTC P1147, P1167 HO2S2 .....................................457
Component Description ........................................457
CONSULT-II Reference Value in Data Monitor Mode
.457
On Board Diagnosis Logic ....................................457
DTC Confirmation Procedure ...............................458
Overall Function Check ........................................458
Wiring Diagram .....................................................460
Diagnostic Procedure ...........................................463
Component Inspection ..........................................465
Removal and Installation ......................................467
DTC P1148, P1168 CLOSED LOOP CONTROL ....468
On Board Diagnosis Logic ....................................468
DTC Confirmation Procedure ...............................468
Overall Function Check ........................................468
Diagnostic Procedure ...........................................469
DTC P1211 TCS CONTROL UNIT ..........................470
Description ............................................................470
On Board Diagnosis Logic ....................................470
DTC Confirmation Procedure ...............................470
Diagnostic Procedure ...........................................470
DTC P1212 TCS COMMUNICATION LINE ............471
Description ............................................................471
On Board Diagnosis Logic ....................................471
DTC Confirmation Procedure ...............................471
Diagnostic Procedure ...........................................471
DTC P1217 ENGINE OVER TEMPERATURE ........472
Description ............................................................472
CONSULT-II Reference Value in Data Monitor Mode
.475
On Board Diagnosis Logic ....................................475
Overall Function Check ........................................475
Wiring Diagram .....................................................477
Diagnostic Procedure ...........................................479
Main 12 Causes of Overheating ...........................484
Component Inspection ..........................................484
DTC P1225 TP SENSOR ........................................485
Component Description ........................................485
On Board Diagnosis Logic ....................................485
DTC Confirmation Procedure ...............................485
Diagnostic Procedure ...........................................486
Removal and Installation ......................................486
DTC P1226 TP SENSOR ........................................487
Component Description ........................................487
On Board Diagnosis Logic ....................................487
DTC Confirmation Procedure ...............................487
Diagnostic Procedure ...........................................488
Removal and Installation ......................................488
DTC P1229 SENSOR POWER SUPPLY ................489
On Board Diagnosis Logic ....................................489
DTC Confirmation Procedure ...............................489
Wiring Diagram .....................................................490
Diagnostic Procedure ...........................................491

EC-12Revision: 2004 November 2004 FX35/FX451095
On Board Diagnosis Logic ...................................1095
DTC Confirmation Procedure ..............................1095
Wiring Diagram ....................................................1096
Diagnostic Procedure ..........................................1099
Component Inspection .........................................11 0 2
Removal and Installation .....................................11 0 2
DTC P1143, P1163 HO2S1 ....................................110 3
Component Description .......................................11 0 3
CONSULT-II Reference Value in Data Monitor Mode
11 0 3
On Board Diagnosis Logic ...................................11 0 3
DTC Confirmation Procedure ..............................11 0 4
Overall Function Check .......................................11 0 5
Diagnostic Procedure ..........................................11 0 5
Component Inspection .........................................11 0 7
Removal and Installation .....................................11 0 8
DTC P1144, P1164 HO2S1 ....................................110 9
Component Description .......................................11 0 9
CONSULT-II Reference Value in Data Monitor Mode
11 0 9
On Board Diagnosis Logic ...................................11 0 9
DTC Confirmation Procedure ..............................111 0
Overall Function Check .......................................1111
Diagnostic Procedure ..........................................1111
Component Inspection .........................................111 3
Removal and Installation .....................................111 5
DTC P1146, P1166 HO2S2 ....................................111 6
Component Description .......................................111 6
CONSULT-II Reference Value in Data Monitor Mode
111 6
On Board Diagnosis Logic ...................................111 6
DTC Confirmation Procedure ..............................111 7
Overall Function Check .......................................111 7
Wiring Diagram ....................................................111 9
Diagnostic Procedure ..........................................11 2 2
Component Inspection .........................................11 2 5
Removal and Installation .....................................11 2 6
DTC P1147, P1167 HO2S2 ....................................112 7
Component Description .......................................11 2 7
CONSULT-II Reference Value in Data Monitor Mode
11 2 7
On Board Diagnosis Logic ...................................11 2 7
DTC Confirmation Procedure ..............................11 2 8
Overall Function Check .......................................11 2 8
Wiring Diagram ....................................................11 3 0
Diagnostic Procedure ..........................................11 3 3
Component Inspection .........................................11 3 6
Removal and Installation .....................................11 3 7
DTC P1148, P1168 CLOSED LOOP CONTROL ...113 8
On Board Diagnosis Logic ...................................11 3 8
DTC Confirmation Procedure ..............................11 3 8
Overall Function Check .......................................11 3 9
Diagnostic Procedure ..........................................11 3 9
DTC P1211 TCS CONTROL UNIT .........................114 0
Description ...........................................................11 4 0
On Board Diagnosis Logic ...................................11 4 0
DTC Confirmation Procedure ..............................11 4 0
Diagnostic Procedure ..........................................11 4 0DTC P1212 TCS COMMUNICATION LINE ............11 41
Description ...........................................................11 4 1
On Board Diagnosis Logic ...................................11 4 1
DTC Confirmation Procedure ...............................11 4 1
Diagnostic Procedure ...........................................11 4 1
DTC P1217 ENGINE OVER TEMPERATURE .......11 42
Description ...........................................................11 4 2
CONSULT-II Reference Value in Data Monitor Mode
11 4 3
On Board Diagnosis Logic ...................................11 4 3
Overall Function Check ........................................11 4 3
Wiring Diagram ....................................................11 4 5
Diagnostic Procedure ...........................................11 4 7
Main 12 Causes of Overheating ..........................11 5 0
Component Inspection .........................................11 5 1
DTC P1225 TP SENSOR .......................................11 52
Component Description .......................................11 5 2
On Board Diagnosis Logic ...................................11 5 2
DTC Confirmation Procedure ...............................11 5 2
Diagnostic Procedure ...........................................11 5 3
Removal and Installation ......................................11 5 3
DTC P1226 TP SENSOR .......................................11 54
Component Description .......................................11 5 4
On Board Diagnosis Logic ...................................11 5 4
DTC Confirmation Procedure ...............................11 5 4
Diagnostic Procedure ...........................................11 5 5
Removal and Installation ......................................11 5 5
DTC P1229 SENSOR POWER SUPPLY ...............11 56
On Board Diagnosis Logic ...................................11 5 6
DTC Confirmation Procedure ...............................11 5 6
Wiring Diagram ....................................................11 5 7
Diagnostic Procedure ...........................................11 5 8
DTC P1444 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE ..............................11 60
Description ...........................................................11 6 0
CONSULT-II Reference Value in Data Monitor Mode
11 6 0
On Board Diagnosis Logic ...................................11 6 1
DTC Confirmation Procedure ...............................11 6 1
Wiring Diagram ....................................................11 6 2
Diagnostic Procedure ...........................................11 6 4
Component Inspection .........................................11 6 7
Removal and Installation ......................................11 6 7
DTC P1446 EVAP CANISTER VENT CONTROL
VALVE .....................................................................11 68
Component Description .......................................11 6 8
CONSULT-II Reference Value in Data Monitor Mode
11 6 8
On Board Diagnosis Logic ...................................11 6 8
DTC Confirmation Procedure ...............................11 6 9
Wiring Diagram ....................................................11 7 0
Diagnostic Procedure ...........................................11 7 1
Component Inspection .........................................11 7 2
DTC P1564 ICC STEERING SWITCH ...................11 74
Component Description .......................................11 7 4
CONSULT-II Reference Value in Data Monitor Mode
11 7 4
On Board Diagnosis Logic ...................................11 7 4
DTC Confirmation Procedure ...............................11 7 4

EC-278
[VQ35DE]
DTC P0181 FTT SENSOR
Revision: 2004 November 2004 FX35/FX45
2. Check resistance between fuel level sensor unit and fuel pump
terminals 4 and 5 by heating with hot water or heat gun as
shown in the figure.
Removal and InstallationABS006PC
FUEL TANK TEMPERATURE SENSOR
Refer to FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY" .
Temperature °C (°F) Resistance kΩ
20 (68) 2.3 - 2.7
50 (122) 0.79 - 0.90
PBIB0931E

DTC P0182, P0183 FTT SENSOR
EC-283
[VQ35DE]
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EC
Revision: 2004 November 2004 FX35/FX45
2. Check resistance between fuel level sensor unit and fuel pump
terminals 4 and 5 by heating with hot water or heat gun as
shown in the figure.
Removal and InstallationABS006PJ
FUEL TANK TEMPERATURE SENSOR
Refer to FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY" .
Temperature °C (°F) Resistance kΩ
20 (68) 2.3 - 2.7
50 (122) 0.79 - 0.90
PBIB0931E