2004 INFINITI FX35 Thermostat

EC-2Revision: 2004 November 2004 FX35/FX45DTC Confirmation Procedure ...............................146
Diagnostic Procedure ...........................................148
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER .149
Description ............................................................149
CONSULT-II Reference Value in Data Monitor Mode
.149
On Board Diagnosis Logic ....................................149
DTC Confirmation Procedure ...............................150
Wiring Diagram .....................................................151
Diagnostic Procedure ...........................................154
Component Inspection ..........................................156
Removal and Installation ......................................156
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .157
Description ............................................................157
CONSULT-II Reference Value in Data Monitor Mode
.157
On Board Diagnosis Logic ....................................157
DTC Confirmation Procedure ...............................158
Wiring Diagram .....................................................159
Diagnostic Procedure ...........................................162
Component Inspection ..........................................164
Removal and Installation ......................................164
DTC P0101 MAF SENSOR .....................................165
Component Description ........................................165
CONSULT-II Reference Value in Data Monitor Mode
.165
On Board Diagnosis Logic ....................................165
DTC Confirmation Procedure ...............................166
Overall Function Check ........................................167
Wiring Diagram .....................................................168
Diagnostic Procedure ...........................................169
Component Inspection ..........................................172
Removal and Installation ......................................172
DTC P0102, P0103 MAF SENSOR .........................173
Component Description ........................................173
CONSULT-II Reference Value in Data Monitor Mode
.173
On Board Diagnosis Logic ....................................173
DTC Confirmation Procedure ...............................174
Wiring Diagram .....................................................175
Diagnostic Procedure ...........................................176
Component Inspection ..........................................179
Removal and Installation ......................................179
DTC P0112, P0113 IAT SENSOR ...........................180
Component Description ........................................180
On Board Diagnosis Logic ....................................180
DTC Confirmation Procedure ...............................180
Wiring Diagram .....................................................182
Diagnostic Procedure ...........................................183
Component Inspection ..........................................184
Removal and Installation ......................................184
DTC P0117, P0118 ECT SENSOR ..........................185
Component Description ........................................185
On Board Diagnosis Logic ....................................185
DTC Confirmation Procedure ...............................186
Wiring Diagram .....................................................187
Diagnostic Procedure ...........................................188
Component Inspection ..........................................189
Removal and Installation ......................................189DTC P0122, P0123 TP SENSOR ............................190
Component Description ........................................190
CONSULT-II Reference Value in Data Monitor Mode
.190
On Board Diagnosis Logic ....................................190
DTC Confirmation Procedure ................................191
Wiring Diagram .....................................................192
Diagnostic Procedure ............................................193
Component Inspection ..........................................196
Removal and Installation .......................................196
DTC P0125 ECT SENSOR ......................................197
Component Description ........................................197
On Board Diagnosis Logic ....................................197
DTC Confirmation Procedure ................................198
Diagnostic Procedure ............................................198
Component Inspection ..........................................199
Removal and Installation .......................................199
DTC P0127 IAT SENSOR ........................................200
Component Description ........................................200
On Board Diagnosis Logic ....................................200
DTC Confirmation Procedure ................................200
Diagnostic Procedure ............................................201
Component Inspection ..........................................202
Removal and Installation .......................................202
DTC P0128 THERMOSTAT FUNCTION .................203
On Board Diagnosis Logic ....................................203
DTC Confirmation Procedure ................................203
Diagnostic Procedure ............................................203
Component Inspection ..........................................204
Removal and Installation .......................................204
DTC P0132, P0152 HO2S1 .....................................205
Component Description ........................................205
CONSULT-II Reference Value in Data Monitor Mode
.205
On Board Diagnosis Logic ....................................205
DTC Confirmation Procedure ................................206
Wiring Diagram .....................................................207
Diagnostic Procedure ............................................210
Component Inspection ..........................................212
Removal and Installation .......................................213
DTC P0133, P0153 HO2S1 .....................................214
Component Description ........................................214
CONSULT-II Reference Value in Data Monitor Mode
.214
On Board Diagnosis Logic ....................................214
DTC Confirmation Procedure ................................215
Overall Function Check .........................................216
Wiring Diagram .....................................................217
Diagnostic Procedure ............................................220
Component Inspection ..........................................224
Removal and Installation .......................................225
DTC P0134, P0154 HO2S1 .....................................226
Component Description ........................................226
CONSULT-II Reference Value in Data Monitor Mode
.226
On Board Diagnosis Logic ....................................226
DTC Confirmation Procedure ................................227
Overall Function Check .........................................228
Wiring Diagram .....................................................229

EC-9
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Revision: 2004 November 2004 FX35/FX45Wiring Diagram .................................................... 839
Diagnostic Procedure ........................................... 840
Component Inspection ......................................... 841
Removal and Installation ...................................... 841
DTC P0117, P0118 ECT SENSOR ......................... 842
Component Description ........................................ 842
On Board Diagnosis Logic ................................... 842
DTC Confirmation Procedure ............................... 843
Wiring Diagram .................................................... 844
Diagnostic Procedure ........................................... 845
Component Inspection ......................................... 846
Removal and Installation ...................................... 847
DTC P0122, P0123 TP SENSOR ........................... 848
Component Description ........................................ 848
CONSULT-II Reference Value in Data Monitor Mode
. 848
On Board Diagnosis Logic ................................... 848
DTC Confirmation Procedure ............................... 849
Wiring Diagram .................................................... 850
Diagnostic Procedure ........................................... 851
Component Inspection ......................................... 854
Removal and Installation ...................................... 854
DTC P0125 ECT SENSOR ..................................... 855
Component Description ........................................ 855
On Board Diagnosis Logic ................................... 855
DTC Confirmation Procedure ............................... 856
Diagnostic Procedure ........................................... 856
Component Inspection ......................................... 857
Removal and Installation ...................................... 857
DTC P0127 IAT SENSOR ....................................... 858
Component Description ........................................ 858
On Board Diagnosis Logic ................................... 858
DTC Confirmation Procedure ............................... 858
Diagnostic Procedure ........................................... 859
Component Inspection ......................................... 860
Removal and Installation ...................................... 860
DTC P0128 THERMOSTAT FUNCTION ................ 861
On Board Diagnosis Logic ................................... 861
DTC Confirmation Procedure ............................... 861
Diagnostic Procedure ........................................... 861
Component Inspection ......................................... 862
Removal and Installation ...................................... 862
DTC P0132, P0152 HO2S1 .................................... 863
Component Description ........................................ 863
CONSULT-II Reference Value in Data Monitor Mode
. 863
On Board Diagnosis Logic ................................... 863
DTC Confirmation Procedure ............................... 864
Wiring Diagram .................................................... 865
Diagnostic Procedure ........................................... 868
Component Inspection ......................................... 870
Removal and Installation ...................................... 871
DTC P0133, P0153 HO2S1 .................................... 872
Component Description ........................................ 872
CONSULT-II Reference Value in Data Monitor Mode
. 872
On Board Diagnosis Logic ................................... 872
DTC Confirmation Procedure ............................... 873
Overall Function Check ........................................ 874Wiring Diagram .....................................................875
Diagnostic Procedure ...........................................878
Component Inspection ..........................................882
Removal and Installation ......................................883
DTC P0134, P0154 HO2S1 .....................................884
Component Description ........................................884
CONSULT-II Reference Value in Data Monitor Mode
.884
On Board Diagnosis Logic ....................................884
DTC Confirmation Procedure ...............................885
Overall Function Check ........................................886
Wiring Diagram .....................................................887
Diagnostic Procedure ...........................................890
Component Inspection ..........................................892
Removal and Installation ......................................893
DTC P0138, P0158 HO2S2 .....................................894
Component Description ........................................894
CONSULT-II Reference Value in Data Monitor Mode
.894
On Board Diagnosis Logic ....................................894
DTC Confirmation Procedure ...............................895
Wiring Diagram .....................................................896
Diagnostic Procedure ...........................................899
Component Inspection ..........................................901
Removal and Installation ......................................902
DTC P0139, P0159 HO2S2 .....................................903
Component Description ........................................903
CONSULT-II Reference Value in Data Monitor Mode
.903
On Board Diagnosis Logic ....................................903
DTC Confirmation Procedure ...............................904
Overall Function Check ........................................904
Wiring Diagram .....................................................906
Diagnostic Procedure ...........................................909
Component Inspection ..........................................912
Removal and Installation ......................................913
DTC P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION ..............................................................914
On Board Diagnosis Logic ....................................914
DTC Confirmation Procedure ...............................914
Wiring Diagram .....................................................916
Diagnostic Procedure ...........................................918
DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION ..............................................................923
On Board Diagnosis Logic ....................................923
DTC Confirmation Procedure ...............................923
Wiring Diagram .....................................................925
Diagnostic Procedure ...........................................927
DTC P0181 FTT SENSOR ......................................931
Component Description ........................................931
On Board Diagnosis Logic ....................................931
DTC Confirmation Procedure ...............................931
Wiring Diagram .....................................................933
Diagnostic Procedure ...........................................934
Component Inspection ..........................................936
Removal and Installation ......................................936
DTC P0182, P0183 FTT SENSOR ..........................937
Component Description ........................................937
On Board Diagnosis Logic ....................................937

TROUBLE DIAGNOSIS
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Revision: 2004 November 2004 FX35/FX45
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

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
2

P0031 P0032 P0051 P0052 Heated oxygen sensor 1 heater

P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater

P0132 P0133 P0134 P0152 P0153 P0154 P1143 P1144 P1163 P1164 Heated oxygen sensor 1

P0138 P0139 P0158 P0159 P1146 P1147 P1166 P1167 Heated oxygen sensor 2

P0441 EVAP control system purge flow monitoring

P0444 P0445 P1444 EVAP canister purge volume control solenoid valve

P0447 P1446 EVAP canister vent control valve

P0451 P0452 P0453 EVAP control system pressure sensor

P0550 Power steering pressure sensor

P0710 P0720 P0725 P0740 P0744 P0745 P1705 P1716 P1730 P1752 P1754 P1757 P1759 P1762 P1764 P1767
P1769 P1772 P1774 A/T related sensors, solenoid valves and switches

P1065 ECM power supply

P 1111 P 1136 Intake valve timing control solenoid valve

P1122 Electric throttle control function

P1124 P1126 P1128 Electric throttle control actuator

P1217 Engine over temperature (OVERHEAT)

P1805 Brake switch
3

P0011 P0021 Intake valve timing control

P0171 P0172 P0174 P0175 Fuel injection system function

P0300 - P0306 Misfire

P0420 P0430 Three way catalyst function

P0442 P0455 P0456 EVAP control system

P0506 P0507 Idle speed control system

P1121 Electric throttle control actuator

P1148 P1168 Closed loop control

P1211 TCS control unit

P1212 TCS communication line

P1564 ICC steering switch/ASCD steering switch

P1568 ICC command valve

P1572 ICC brake switch/ASCD brake switch

P1574 ICC vehicle speed sensor/ASCD vehicle speed sensor

TROUBLE DIAGNOSIS
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Revision: 2004 November 2004 FX35/FX45
1 - 6: The numbers refer to the order of inspection.Cooling
Radiator/Hose/Radiator filler cap
55555 55 45CO-14
,
CO-17
Thermostat 5CO-26
Water pumpCO-22
Water galleryCO-28
Cooling fan 5EC-203
Coolant level (Low)/Contami-
nated coolant5CO-11
IVIS (Infiniti Vehicle Immobilizer System —
NATS)11EC-68 or
BL-206
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

DTC P0117, P0118 ECT SENSOR
EC-189
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Revision: 2004 November 2004 FX35/FX45
3. CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECT sensor terminal 2 and ECM terminal 67.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-189, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace engine coolant temperature sensor.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-135, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionABS006MS
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.

*: This data is reference value and are measured between ECM terminal 73
(Engine coolant temperature sensor) and ground.
2. If NG, replace engine coolant temperature sensor.
Removal and InstallationABS006MT
ENGINE COOLANT TEMPERATURE SENSOR
Refer to CO-26, "WATER INLET AND THERMOSTAT ASSEMBLY" . Continuity should exist.
PBIB2005E
Engine coolant
temperature°C (°F)Voltage* V Resistance kΩ
20 (68) 3.5 2.1 - 2.9
50 (122) 2.2 0.68 - 1.00
90 (194) 0.9 0.236 - 0.260
SEF012P

DTC P0125 ECT SENSOR
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Revision: 2004 November 2004 FX35/FX45
DTC P0125 ECT SENSORPFP:22630
Component DescriptionABS006NA
NOTE:
If DTC P0125 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117 or
P0118. Refer to EC-185
.
The engine coolant temperature sensor is used to detect the engine
coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.

*: This data is reference value and is measured between ECM terminal 73 (Engine
coolant temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis LogicABS006NB
This self-diagnosis has the one trip detection logic.
SEF594K
Engine coolant
temperature°C (°F)Voltage* V Resistance kΩ
-10 (14) 4.4 7.0 - 11.4
20 (68) 3.5 2.1 - 2.9
50 (122) 2.2 0.68 - 1.00
90 (194) 0.9 0.236 - 0.260
SEF012P
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0125
0125Insufficient engine cool-
ant temperature for
closed loop fuel control

Voltage sent to ECM from the sensor is not
practical, even when some time has passed
after starting the engine.

Engine coolant temperature is insufficient for
closed loop fuel control.

Harness or connectors
(High resistance in the circuit)

Engine coolant temperature sensor

Thermostat

DTC P0125 ECT SENSOR
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Revision: 2004 November 2004 FX35/FX45
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-26, "
WATER INLET AND THERMOSTAT ASSEMBLY"
.
4. CHECK INTERMITTENT INCIDENT
Refer to EC-135, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
Refer to EC-187, "
Wiring Diagram" .
>>INSPECTION END
Component InspectionABS006NE
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.

*: This data is reference value and is measured between ECM terminal 73
(Engine coolant temperature sensor) and ground.
2. If NG, replace engine coolant temperature sensor.
Removal and InstallationABS006NF
ENGINE COOLANT TEMPERATURE SENSOR
Refer to CO-26, "WATER INLET AND THERMOSTAT ASSEMBLY" .
PBIB2005E
Engine coolant
temperature°C (°F)Voltage* V Resistance kΩ
20 (68) 3.5 2.1 - 2.9
50 (122) 2.2 0.68 - 1.00
90 (194) 0.9 0.236 - 0.260
SEF012P

DTC P0128 THERMOSTAT FUNCTION
EC-203
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Revision: 2004 November 2004 FX35/FX45
DTC P0128 THERMOSTAT FUNCTIONPFP:21200
On Board Diagnosis LogicABS006NM
Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long
enough.
This is due to a leak in the seal or the thermostat stuck open.
DTC Confirmation ProcedureABS006NN
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:

For best results, perform at ambient temperature of –10°C (14°F) or higher.

For best results, perform at engine coolant temperature of –10°C (14°F) to 60°C (140°F).
WITH CONSULT-II
1. Replace thermostat with new one. Refer to CO-26, "WATER INLET AND THERMOSTAT ASSEMBLY" .
Use only a genuine NISSAN thermostat as a replacement. If an incorrect thermostat is used, the MIL may
come on.
2. Turn ignition switch ON.
3. Select “COOLAN TEMP/S” in “DATA MONITOR” mode with
CONSULT-II.
4. Check that the “COOLAN TEMP/S” is above 60°C (140°F).
If it is below 60°C (140°F), go to following step.
If it is above 60°C (140°F), cool down the engine to less than
60°C (140°F), then retry from step 1.
5. Drive vehicle for 10 consecutive minutes under the following
conditions.
If 1st trip DTC is detected, go to EC-203, "
Diagnostic Procedure"
.
WITH GST
1. Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureABS006NO
1. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-204, "
Component Inspection" .
OK or NG
OK >>INSPECTION END
NG >> Replace engine coolant temperature sensor.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0128
0128Thermostat functionThe engine coolant temperature does not
reach to specified temperature even though
the engine has run long enough.

Thermostat

Leakage from sealing portion of thermo-
stat

Engine coolant temperature sensor
VHCL SPEED SE 80 - 120 km/h (50 - 75 MPH)
SEF176Y