2004 INFINITI FX35 Service Manual

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Page 1609 of 4449

INFINITI FX35 2004 Service Manual EC-268
[VQ35DE]
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
Revision: 2004 November 2004 FX35/FX45
BANK 2
TBWM0295E

Page 1610 of 4449

INFINITI FX35 2004 Service Manual DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
EC-269
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Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureABS006P5
1. CHECK EXHAUST GAS LEAK
1. Start engine

Page 1611 of 4449

INFINITI FX35 2004 Service Manual EC-270
[VQ35DE]
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
Revision: 2004 November 2004 FX35/FX45
3. CHECK HEATED OXYGEN SENSOR 1 CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Discon

Page 1612 of 4449

INFINITI FX35 2004 Service Manual DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
EC-271
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Revision: 2004 November 2004 FX35/FX45
5. DETECT MALFUNCTIONING PART
Check the following.
Fuel pump and circu

Page 1613 of 4449

INFINITI FX35 2004 Service Manual EC-272
[VQ35DE]
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
Revision: 2004 November 2004 FX35/FX45
7. CHECK FUNCTION OF INJECTORS
With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” i

Page 1614 of 4449

INFINITI FX35 2004 Service Manual DTC P0181 FTT SENSOR
EC-273
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Revision: 2004 November 2004 FX35/FX45
DTC P0181 FTT SENSORPFP:22630
Component DescriptionABS006P6
The fuel tank temperature sensor is us

DTC P0181 FTT SENSOR
EC-273
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Revision: 2004 November 2004 FX35/FX45
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-276, "
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-276, "
Diagnostic Procedure" .
PBIB1572E
Fluid temperature
°C (°F)Voltage*
VResistance
kΩ
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
0181Fuel tank temperature
sensor circuit range/
performanceRationally 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 1615 of 4449

INFINITI FX35 2004 Service Manual EC-274
[VQ35DE]
DTC P0181 FTT SENSOR
Revision: 2004 November 2004 FX35/FX45
WITH GST
Follow the procedure “WITH CONSULT-II” above.

Page 1616 of 4449

INFINITI FX35 2004 Service Manual DTC P0181 FTT SENSOR
EC-275
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Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006P9
TBWH0109E

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