2005 INFINITI FX35 Service Manual

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Page 1617 of 4731

INFINITI FX35 2005 Service Manual EC-224
[VQ35DE]
DTC P0127 IAT SENSOR
Revision: 2005 July 2005 FX
b. Select “DATA MONITOR” mode with CONSULT-II.
c. Check the engine coolant temperature.
d. If the engine coolant temperature is no

Page 1618 of 4731

INFINITI FX35 2005 Service Manual DTC P0127 IAT SENSOR EC-225
[VQ35DE]
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Revision: 2005 July 2005 FX
Component InspectionABS006NK
INTAKE AIR TEMPERATURE SENSOR
1. Check resistance between intake a

Page 1619 of 4731

INFINITI FX35 2005 Service Manual EC-226
[VQ35DE]
DTC P0128 THERMOSTAT FUNCTION
Revision: 2005 July 2005 FX
DTC P0128 THERMOSTAT FUNCTIONPFP:21200
On Board Diagnosis LogicABS006NM
Engine coolant temperature has not risen enough to ope

EC-226
[VQ35DE]
DTC P0128 THERMOSTAT FUNCTION
Revision: 2005 July 2005 FX
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-226, "
Diagnostic Procedure"
.
WITH GST
1. Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureABS006NO
1. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-227, "
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
0128 Thermostat function The 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

Page 1620 of 4731

INFINITI FX35 2005 Service Manual DTC P0128 THERMOSTAT FUNCTION EC-227
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Revision: 2005 July 2005 FX
Component InspectionABS006NP
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance bet

Page 1621 of 4731

INFINITI FX35 2005 Service Manual EC-228
[VQ35DE]
DTC P0138, P0158 HO2S2
Revision: 2005 July 2005 FX
DTC P0138, P0158 HO2S2PFP:226A0
Component DescriptionABS006OH
The heated oxygen sensor 2, after three way catalyst 1, monitors the
o

Page 1622 of 4731

INFINITI FX35 2005 Service Manual DTC P0138, P0158 HO2S2 EC-229
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Revision: 2005 July 2005 FX
DTC Confirmation ProcedureABS006OK
NOTE:
If DTC Confirmation Procedure has been previously c

Page 1623 of 4731

INFINITI FX35 2005 Service Manual EC-230
[VQ35DE]
DTC P0138, P0158 HO2S2
Revision: 2005 July 2005 FX
Wiring DiagramABS006OL
BANK 1
TBWM0292E

Page 1624 of 4731

INFINITI FX35 2005 Service Manual DTC P0138, P0158 HO2S2 EC-231
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Revision: 2005 July 2005 FX
Specification data are reference values and are measured between each terminal and ground.
C

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