Nissan Frontier D22. Manual — part 585
DTC P0181 FTT SENSOR
EC-1443
[VG33ER]
C
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EC
DTC P0181 FTT SENSOR
PFP:22630
Component Description
UBS00DW7
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.
<Reference data>
*: These data are reference values and are measured between ECM terminal 60
(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 the ECM terminals, such as the ground.
On Board Diagnosis Logic
UBS00DW8
DTC Confirmation Procedure
UBS00DW9
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 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-1446, "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-1446, "Diagnostic Procedure"
.
LEC764
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
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
EC-1444
[VG33ER]
DTC P0181 FTT SENSOR
WITH GST
Follow the procedure “WITH CONSULT-II”.
DTC P0181 FTT SENSOR
EC-1445
[VG33ER]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
UBS00DWA
BBWA1084E
EC-1446
[VG33ER]
DTC P0181 FTT SENSOR
Diagnostic Procedure
UBS00DWB
1.
CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect fuel level sensor unit harness connector.
3.
Turn ignition switch ON.
4.
Check voltage between fuel level sensor unit terminal T and
ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors C1, M67
●
Harness connectors M81, F36
●
Harness for open or short between ECM and fuel tank temperature sensor
>> Repair harness or connector.
3.
CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check harness continuity between fuel level sensor unit terminal E and body ground. Refer to Wiring Dia-
gram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors C1, M67.
●
Harness for open between fuel tank temperature sensor and body ground.
>> Repair open circuit or short to power in harness or connectors.
LEC764
Voltage: Approximately 5V
SEC310C
Continuity should exist.
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