2011 NISSAN LATIO Service Repair Manual

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Page 1537 of 3787

NISSAN LATIO 2011 Service Repair Manual P0172 FUEL INJECTION SYSTEM FUNCTIONEC-243
< COMPONENT DIAGNOSIS > [HR16DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
>> INSPECTION END
Revision: May 2010
2011 Versa

Page 1538 of 3787

NISSAN LATIO 2011 Service Repair Manual EC-244
< COMPONENT DIAGNOSIS >[HR16DE]
P0181 FTT SENSOR
P0181 FTT SENSOR
DescriptionINFOID:0000000005929916
The fuel tank temperature sensor
is used to detect the fuel tempera-
ture inside the fuel t

EC-244
< COMPONENT DIAGNOSIS >[HR16DE]
P0181 FTT SENSOR
P0181 FTT SENSOR
DescriptionINFOID:0000000005929916
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 the rmistor 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 43 (Fuel tank temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output volt age. Doing so may result in damage to the ECM's transis-
tor. Use a ground other than ECM terminals, such as the ground.
DTC LogicINFOID:0000000005929917
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Turn ignition switch and wait at least 10 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-246, "Diagnosis Procedure".
NO >> GO TO 3.
3.CHECK ENGINE COOLANT TEMPERATURE
With CONSULT-III
1. Select “COOLAN TEMP/S” in “DATA MONITOR” mode with CONSULT-III.
2. Check “COOLAN TEMP/S” indication.
With GST
Follow the procedure “With CONSULT-III” above.
Is
“COOLAN TEMP/S” indication less than 60°C (140°F)?
YES >> INSPECTION END
NO >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
Fluid temperature
[° C ( °F)] Voltage*
[V] Resistance
[kΩ]
20 (68) 3.52.3 - 2.7
50 (122) 2.20.79 - 0.90
SEF012P
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0181 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
(The sensor circuit is open or shorted)
• Fuel tank temperature sensor
Revision: May 2010 2011 Versa

Page 1539 of 3787

NISSAN LATIO 2011 Service Repair Manual P0181 FTT SENSOREC-245
< COMPONENT DIAGNOSIS > [HR16DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
With CONSULT-III
1. Cool engine down until “COOLAN TE MP/S” indication is less than 60°C (140° F).
2. Wait

Page 1540 of 3787

NISSAN LATIO 2011 Service Repair Manual EC-246
< COMPONENT DIAGNOSIS >[HR16DE]
P0181 FTT SENSOR
Wiring Diagram
INFOID:0000000005929918
Diagnosis ProcedureINFOID:0000000005929919
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Chec

Page 1541 of 3787

NISSAN LATIO 2011 Service Repair Manual P0181 FTT SENSOREC-247
< COMPONENT DIAGNOSIS > [HR16DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK FUEL TANK TEMPERATURE
SENSOR POWER SUPPLY CI

P0181 FTT SENSOREC-247
< COMPONENT DIAGNOSIS > [HR16DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK FUEL TANK TEMPERATURE
SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect “fuel level sensor unit and fuel pump” harness connector.
3. Turn ignition switch ON.
4. Check the voltage between “fuel level sensor unit and fuel pump” harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B102, M13
• Harness connectors M69, E7
• Harness connectors E8, F8
• Harness for open or short between ECM and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to ground or short to power in harness or connector.
4.CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect combination meter harness connector.
3. Check the continuity between “fuel level sensor unit and fuel pump” harness connector and combination
meter harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B102, M13
• Harness for open or short between “fuel level sensor unit and fuel pump” and combination meter
>> Repair open circuit or short to ground or short to power in harness or connector.
6.CHECK FUEL TANK TEMPERATURE SENSOR
Refer to EC-248, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace “fuel level sensor unit, fuel filter and fuel pump assembly”. Refer to FL-6, "
Component".
7.CHECK INTERMITTENT INCIDENT
Refer to EC-122, "
Diagnosis Procedure".
Fuel level sensor unit and fuel pump
Ground Voltage
Connector Terminal
B100 4 Ground Approx. 5 V
PBIB0932E
Fuel level sensor unit and fuel pump Combination meter Continuity
Connector Terminal Connector Terminal
B100 5M24 24 Existed
Revision: May 2010 2011 Versa

Page 1542 of 3787

NISSAN LATIO 2011 Service Repair Manual EC-248
< COMPONENT DIAGNOSIS >[HR16DE]
P0181 FTT SENSOR
>> INSPECTION END
Component InspectionINFOID:0000000005929920
1.CHECK FUEL TANK TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect �

Page 1543 of 3787

NISSAN LATIO 2011 Service Repair Manual P0182, P0183 FTT SENSOREC-249
< COMPONENT DIAGNOSIS > [HR16DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P0182, P0183 FTT SENSOR
DescriptionINFOID:0000000006141111
The fuel tank temperature sensor
is used to d

Page 1544 of 3787

NISSAN LATIO 2011 Service Repair Manual EC-250
< COMPONENT DIAGNOSIS >[HR16DE]
P0182, P0183
FTT SENSOR
Wiring Diagram
INFOID:0000000006141112
Diagnosis ProcedureINFOID:0000000006141113
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.

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