2006 INFINITI FX35 Service Manual

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Page 1705 of 4462

INFINITI FX35 2006 Service Manual DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION EC-321
[VQ35DE]
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EC
Revision: 2006 December 2006 FX35/FX45
BANK 2
TBWM1385E

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INFINITI FX35 2006 Service Manual EC-322
[VQ35DE]
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
Revision: 2006 December 2006 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
Pulse

Page 1707 of 4462

INFINITI FX35 2006 Service Manual DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION EC-323
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Revision: 2006 December 2006 FX35/FX45
Diagnostic ProcedureNBS003PB
1. CHECK EXHAUST GAS LEAK
1.

Page 1708 of 4462

INFINITI FX35 2006 Service Manual EC-324
[VQ35DE]
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
Revision: 2006 December 2006 FX35/FX45
3. CHECK AIR FUEL RATIO (A/F) SENSOR 1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Dis

Page 1709 of 4462

INFINITI FX35 2006 Service Manual DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION EC-325
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Revision: 2006 December 2006 FX35/FX45
4. CHECK FUEL PRESSURE
1. Release fuel pressure to zero.

Page 1710 of 4462

INFINITI FX35 2006 Service Manual EC-326
[VQ35DE]
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
Revision: 2006 December 2006 FX35/FX45
8. CHECK FUNCTION OF FUEL INJECTOR-I
Without CONSULT-II
1. Stop engine.
2. Disconnect harnes

Page 1711 of 4462

INFINITI FX35 2006 Service Manual DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION EC-327
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Revision: 2006 December 2006 FX35/FX45
9. CHECK FUNCTION OF FUEL INJECTOR-II
Provide battery vol

Page 1712 of 4462

INFINITI FX35 2006 Service Manual EC-328
[VQ35DE]
DTC P0181 FTT SENSOR
Revision: 2006 December 2006 FX35/FX45
DTC P0181 FTT SENSORPFP:22630
Component DescriptionNBS003PC
The fuel tank temperature (FTT) sensor is used to detect the fue

EC-328
[VQ35DE]
DTC P0181 FTT SENSOR
Revision: 2006 December 2006 FX35/FX45
DTC P0181 FTT SENSORPFP:22630
Component DescriptionNBS003PC
The fuel tank temperature (FTT) sensor is used to detect the fuel
temperature inside the fuel tank. The sensor modifies a voltage sig-
nal from the ECM. The modified signal returns to the ECM as the
fuel temperature input. The sensor uses a thermistor which is sensi-
tive to the change in temperature. The electrical resistance of the
thermistor decreases as temperature increases.

*: This data is reference values 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 LogicNBS003PD
DTC Confirmation ProcedureNBS003PE
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-331, "
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-331, "
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
(Fuel tank temperature sensor circuit is
open or shorted)
Fuel tank temperature sensor
Unified meter and A/C amp.
SEF174Y

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