2009 NISSAN LATIO Service Repair Manual

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Page 2105 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0172 FUEL INJECT
ION SYSTEM FUNCTION
EC-749
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
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NP
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Do not use ECM ground terminals wh
en measuring input/output voltage. Doing so may r

Page 2106 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-750< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0172 FUEL INJECTION SYSTEM FUNCTION
Listen for an intake air leak after the mass air flow sensor.
OK or NG OK >> GO TO 3.
NG >> Repair or replace. 3.
CHEC

Page 2107 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0172 FUEL INJECT
ION SYSTEM FUNCTION
EC-751
< SERVICE INFOMATION >
[MR TYPE 1] C
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OK or NG OK >> GO TO 7.
NG >> Check connectors for rusted terminals or loose c onnec

Page 2108 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-752< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0181 FTT SENSOR
DTC P0181 FTT SENSOR
Component Description INFOID:0000000004537232
The fuel tank temperature sensor (4) is used to detect the fuel tem-
p

EC-752< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0181 FTT SENSOR
DTC P0181 FTT SENSOR
Component Description INFOID:0000000004537232
The fuel tank temperature sensor (4) is used to detect the fuel tem-
perature inside the fuel tank. The sensor modifies a voltage signal
from the ECM. The modified signal returns to the ECM as the fuel
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The elec trical resistance of the ther-
mistor decreases as temperature increases.
• Fuel level sensor unit and fuel pump (1)
• Fuel pressure regulator (2)
• Fuel level sensor (3)

*: This data is reference values and is measured between ECM terminal 43 (Fuel
tank temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output
voltage. Doing so may result da mage the ECM's transistor. Use
ground other than ECM, such as ground.
On Board Diagn osis Logic INFOID:0000000004537233
DTC Confirmation Procedure INFOID:0000000004537234
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-III
1. Turn ignition switch ON and wait at least 10 seconds.
2. Check 1st trip DTC. If 1st trip DTC is detected, go to EC-753, " Diagnosis Procedure " .
If 1st trip DTC is not det ected, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-III.
4. Check “COOLAN TEMP/S” value.
If the “COOLAN TEMP/S” is less than 60 °C (140 °F), the result will be OK.
If the “COOLAN TEMP/S” is above 60 °C (140 °F), go to the following step.
5. Cool engine down until “COOLAN TEMP/S” signal is less than 60 °C (140 °F).
6. Wait at least 10 seconds.
7. Check 1st trip DTC.
8. If 1st trip DTC is detected, go to EC-753, " Diagnosis Procedure " .
WITH GST BBIA0704E
Fluid temperature
°C ( °F) Voltage*
V Resistance
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
0181 Fuel tank temperature
sensor circuit range/per-
formance Rationally incorrect voltage from the sensor is
sent to ECM, compared with the voltage signals
from engine coolant temperature sensor and in-
take air temperature sensor. • Harness or connectors
(Fuel tank temperature sensor circuit is
open or shorted)
• Fuel tank temperature sensor

Page 2109 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0181 FTT SENSOR
EC-753
< SERVICE INFOMATION >
[MR TYPE 1] C
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Follow the procedure “WITH CONSULT-III” above.
Wiring Diagram INFOID:0000000004537235
Diagnosis Proce

Page 2110 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-754< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0181 FTT SENSOR
2. Loosen and retighten ground screw on the body. Refer to EC-632, " Ground Inspection " .
OK or NG OK >> GO TO 2.
NG >> Repair or replac

Page 2111 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0181 FTT SENSOR
EC-755
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
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2. Disconnect combination meter harness connector.
3. Check harness continuity between “fuel level

Page 2112 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-756< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0182, P0183 FTT SENSOR
DTC P0182, P0183 FTT SENSOR
Component Description INFOID:0000000004537239
The fuel tank temperature sensor (4) is used to detect t

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