2005 INFINITI FX35 Service Manual

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Page 1657 of 4731

INFINITI FX35 2005 Service Manual EC-264
[VQ35DE]
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
Revision: 2005 July 2005 FX
4. CHECK FUEL PRESSURE
1. Release fuel pressure to zero. Refer to EC-99, "
FUEL PRESSURE RELEASE" .
2. I

Page 1658 of 4731

INFINITI FX35 2005 Service Manual DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION EC-265
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Revision: 2005 July 2005 FX
8. CHECK FUNCTION OF INJECTOR-I
Without CONSULT-II
1. Stop engi

Page 1659 of 4731

INFINITI FX35 2005 Service Manual EC-266
[VQ35DE]
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
Revision: 2005 July 2005 FX
9. CHECK FUNCTION OF INJECTOR-II
Provide battery voltage between harness connector F251 as follows
and the

Page 1660 of 4731

INFINITI FX35 2005 Service Manual DTC P0181 FTT SENSOR EC-267
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Revision: 2005 July 2005 FX
DTC P0181 FTT SENSORPFP:22630
Component DescriptionABS006P6
The fuel tank temperature sensor is

DTC P0181 FTT SENSOR EC-267
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Revision: 2005 July 2005 FX
DTC P0181 FTT SENSORPFP:22630
Component DescriptionABS006P6
The fuel tank temperature sensor is used to detect the fuel tempera-
ture inside the fuel tank. The sensor modifies a voltage signal from
the ECM. The modified signal returns to the ECM as the fuel temper-
ature input. The sensor uses a thermistor which is sensitive to the
change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.

*: This data is reference value and is measured between ECM terminal 107 (fuel tank
temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output
voltage. Doing so may result in damage to the ECM's transistor.
Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis LogicABS006P7
DTC Confirmation ProcedureABS006P8
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.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 10 seconds. If the result is NG, go to EC-270, "
Diagnostic Procedure" .
If the result is OK, go to following step.
4. Check “COOLAN TEMP/S” value. If “COOLAN TEMP/S” is less than 60 °C (140 °F), the result will
be OK.
If “COOLAN TEMP/S” is above 60 °C (140 °F), go to the following
step.
5. Cool engine down until “COOLAN TEMP/S” is less than 60 °C
(140 °F).
6. Wait at least 10 seconds.
7. If 1st trip DTC is detected, go to EC-270, "
Diagnostic Procedure" .
PBIB1572E
Fluid temperature
° C ( °F) Voltage*
V Resistance
k Ω
20 (68) 3.5 2.3 - 2.7
50 (122) 2.2 0.79 - 0.90
SEF012P
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0181
0181 Fuel tank temperature
sensor circuit range/
performance Rationally incorrect voltage from the sensor is
sent to ECM, compared with the voltage sig-
nals from engine coolant temperature sensor
and intake air temperature sensor.
Harness or connectors
(The sensor circuit is open or shorted)
Fuel tank temperature sensor
Unified meter and A/C amp.
SEF174Y

Page 1661 of 4731

INFINITI FX35 2005 Service Manual EC-268
[VQ35DE]
DTC P0181 FTT SENSOR
Revision: 2005 July 2005 FX
WITH GST
Follow the procedure “WITH CONSULT-II” above.

Page 1662 of 4731

INFINITI FX35 2005 Service Manual DTC P0181 FTT SENSOR EC-269
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Revision: 2005 July 2005 FX
Wiring DiagramABS006P9
TBWH0109E

Page 1663 of 4731

INFINITI FX35 2005 Service Manual EC-270
[VQ35DE]
DTC P0181 FTT SENSOR
Revision: 2005 July 2005 FX
Diagnostic ProcedureABS006PA
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground three screws on

Page 1664 of 4731

INFINITI FX35 2005 Service Manual DTC P0181 FTT SENSOR EC-271
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Revision: 2005 July 2005 FX
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors B1, M11
Harness for op

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