Infiniti F50. Manual — part 437
DTC P0461 FUEL LEVEL SENSOR
EC-389
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EC
DTC P0461 FUEL LEVEL SENSOR
PFP:25060
Component Description
EBS00MFP
The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the ECM.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.
On Board Diagnosis Logic
EBS00MFQ
Driving long distances naturally affect fuel gauge level.
This diagnosis detects the fuel gauge malfunction of the gauge not moving even after a long distance has
been driven.
Overall Function Check
EBS00MFR
Use this procedure to check the overall function of the fuel level sensor function. During this check, a 1st trip
DTC might not be confirmed.
WARNING:
When performing following procedure, be sure to observe the handling of the fuel. Refer to
.
TESTING CONDITION:
Before starting overall function check, preparation of draining fuel and refilling fuel is required.
WITH CONSULT-II
NOTE:
Start from step 10, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/
8 Imp gal) in advance.
1.
Prepare a fuel container and a spare hose.
2.
Release fuel pressure from fuel line, refer to
EC-48, "FUEL PRESSURE RELEASE"
3.
Remove the fuel feed hose on the fuel level sensor unit.
4.
Connect a spare fuel hose where the fuel feed hose was removed.
5.
Turn ignition switch “OFF” and wait at least 10 seconds then turn “ON”.
6.
Select “FUEL LEVEL SE” in “DATA MONITOR” mode with CONSULT-II.
7.
Check “FUEL LEVEL SE” output voltage and note it.
8.
Select “FUEL PUMP” in “ACTIVE TEST” mode with CONSULT-
II.
9.
Touch “ON” and drain fuel approximately 30 (7-7/8 US gal, 6-
5/8 Imp gal) and stop it.
10. Check “FUEL LEVEL SE” output voltage and note it.
11. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
12. Check “FUEL LEVEL SE” output voltage and note it.
13. Confirm whether the voltage changes more than 0.03V during
step 7 to 10 and 10 to 12.
If NG, check the fuel level sensor, refer to
PBIB1241E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0461
0461
Fuel level sensor circuit
range/performance
The output signal of the fuel level sensor does not
change within the specified range even though
the vehicle has been driven a long distance.
●
Harness or connectors
(The sensor circuit is open or shorted)
●
Fuel level sensor
SEF195Y
EC-390
DTC P0461 FUEL LEVEL SENSOR
WITH GST
NOTE:
Start from step 8, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/8
Imp gal) in advance.
1.
Prepare a fuel container and a spare hose.
2.
Release fuel pressure from fuel line, refer to
EC-48, "FUEL PRESSURE RELEASE"
3.
Remove the fuel feed hose on the fuel level sensor unit.
4.
Connect a spare fuel hose where the fuel feed hose was removed.
5.
Turn ignition switch “OFF”.
6.
Set voltmeters probe between ECM terminal 119 (fuel level sen-
sor signal) and ground.
7.
Turn ignition switch “ON”.
8.
Check voltage between ECM terminal 119 and ground and note
it.
9.
Drain fuel by 30 (7-7/8 US gal, 6-5/8 Imp gal) from the fuel
tank using proper equipment.
10. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
11. Confirm that the voltage between ECM terminal 119 and ground
changes more than 0.03V during step 8 - 10.
If NG, check component of fuel level sensor, refer to
"CHECK FUEL LEVEL SENSOR UNIT"
PBIB1149E
DTC P0462, P0463 FUEL LEVEL SENSOR
EC-391
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EC
DTC P0462, P0463 FUEL LEVEL SENSOR
PFP:25060
Component Description
EBS00MFS
The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the ECM.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.
On Board Diagnosis Logic
EBS00MFT
ECM receives two signals from the fuel level sensor circuit.
One is fuel level sensor power supply circuit, and the other is fuel level sensor ground circuit.
This diagnosis indicates the former, to detect open or short circuit malfunction.
DTC Confirmation Procedure
EBS00MFU
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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at ignition
switch “ON”.
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-393, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
PBIB1241E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0462
0462
Fuel level sensor circuit
low input
An excessively low voltage is sent from the
sensor is sent to ECM.
●
Harness or connectors
(The sensor circuit is open or shorted)
●
Fuel level sensor
P0463
0463
Fuel level sensor circuit
high input
An excessively high voltage is sent from the
sensor is sent to ECM.
SEF195Y
EC-392
DTC P0462, P0463 FUEL LEVEL SENSOR
Wiring Diagram
EBS00MFV
TBWM0159E
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