2006 INFINITI FX35 Service Manual

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Page 2377 of 4462

INFINITI FX35 2006 Service Manual DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION EC-993
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Revision: 2006 December 2006 FX35/FX45
3. CHECK AIR FUEL RATIO (A/F) SENSOR 1 INPUT SIGNAL CIRCUI

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INFINITI FX35 2006 Service Manual EC-994
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DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
Revision: 2006 December 2006 FX35/FX45
4. CHECK FUEL PRESSURE
1. Release fuel pressure to zero. Refer to EC-746, "
FUEL PRESSURE RELE

Page 2379 of 4462

INFINITI FX35 2006 Service Manual DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION EC-995
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Revision: 2006 December 2006 FX35/FX45
8. CHECK FUNCTION OF FUEL INJECTOR-I
Without CONSULT-I

Page 2380 of 4462

INFINITI FX35 2006 Service Manual EC-996
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DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
Revision: 2006 December 2006 FX35/FX45
9. CHECK FUNCTION OF FUEL INJECTOR-II
Provide battery voltage between the following terminals, a

Page 2381 of 4462

INFINITI FX35 2006 Service Manual DTC P0181 FTT SENSOR EC-997
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Revision: 2006 December 2006 FX35/FX45
DTC P0181 FTT SENSORPFP:22630
Component DescriptionNBS0046B
The fuel tank temperature

DTC P0181 FTT SENSOR EC-997
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Revision: 2006 December 2006 FX35/FX45
DTC P0181 FTT SENSORPFP:22630
Component DescriptionNBS0046B
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.

*: These data are reference values and are 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 LogicNBS0046C
DTC Confirmation ProcedureNBS0046D
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-1000, "
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-1000, "
Diagnostic Procedure" .
PBIB1507E
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
SEF174Y

Page 2382 of 4462

INFINITI FX35 2006 Service Manual EC-998
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DTC P0181 FTT SENSOR
Revision: 2006 December 2006 FX35/FX45
WITH GST
Follow the procedure “WITH CONSULT-II” above.

Page 2383 of 4462

INFINITI FX35 2006 Service Manual DTC P0181 FTT SENSOR EC-999
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Revision: 2006 December 2006 FX35/FX45
Wiring DiagramNBS0046E
TBWM1334E

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INFINITI FX35 2006 Service Manual EC-1000
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DTC P0181 FTT SENSOR
Revision: 2006 December 2006 FX35/FX45
Diagnostic ProcedureNBS0046F
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three groun

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