Infiniti F50. Manual — part 411
DTC P0181 FTT SENSOR
EC-285
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EC
Diagnostic Procedure
EBS00MCY
1.
CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect fuel level sensor unit and fuel pump harness con-
nector.
3.
Turn ignition switch “ON”.
4.
Check voltage between fuel level sensor unit and fuel pump ter-
minal 4 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 B211, M141
●
Harness connectors M135, F105
●
Harness for open or short between ECM and fuel level sensor unit and fuel pump
>> 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 and fuel pump terminal 2 and body ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
PBIB1249E
Voltage: Approximately 5V
PBIB0316E
Continuity should exist.
EC-286
DTC P0181 FTT SENSOR
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors B211, M141
●
Harness connectors M135, F105
●
Joint connector-30
●
Harness for open or short between ECM and fuel level sensor unit and fuel pump
>> Repair open circuit or short to power in harness or connector.
5.
CHECK FUEL TANK TEMPERATURE SENSOR
Refer to
EC-286, "Component Inspection"
OK or NG
OK
>> GO TO 6.
NG
>> Replace fuel level sensor unit.
6.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS00MCZ
FUEL TANK TEMPERATURE SENSOR
1.
Remove fuel level sensor unit.
2.
Check resistance between fuel level sensor unit and fuel pump
terminals 4 and 2 by heating with hot water or heat gun as
shown in the figure.
Removal and Installation
EBS00MD0
FUEL TANK TEMPERATURE SENSOR
Refer to
FL-3, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"
Temperature
°
C (
°
F)
Resistance k
Ω
20 (68)
2.3 - 2.7
50 (122)
0.79 - 0.90
PBIB0200E
DTC P0182, P0183 FTT SENSOR
EC-287
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EC
DTC P0182, P0183 FTT SENSOR
PFP:22630
Component Description
EBS00MD1
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 92
(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 Logic
EBS00MD2
DTC Confirmation Procedure
EBS00MD3
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 5 seconds.
4.
If 1st trip DTC is detected, go to
EC-289, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
PBIB1249E
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
P0182
0182
Fuel tank temperature
sensor circuit low input
An excessively low voltage from the sensor is
sent to ECM.
●
Harness or connectors
(The sensor circuit is open or shorted.)
●
Fuel tank temperature sensor
P0183
0183
Fuel tank temperature
sensor circuit high input
An excessively high voltage from the sensor is
sent to ECM.
SEF174Y
EC-288
DTC P0182, P0183 FTT SENSOR
Wiring Diagram
EBS00MD4
TBWM0153E
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