Nissan Frontier D22. Manual - part 468

DTC P0461 FUEL LEVEL SENSOR

EC-975

[VG33E]

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 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-616, "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 46 (fuel level sen-
sor signal) and ground.

7.

Turn ignition switch ON.

8.

Check voltage between ECM terminal 46 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 46 and ground

changes more than 0.03V during step 8 - 10.
If NG, check component of fuel level sensor, refer to 

DI-18,

"FUEL LEVEL SENSOR UNIT CHECK"

 .

SEF802Z

EC-976

[VG33E]

DTC P0462, P0463 FUEL LEVEL SENSOR

DTC P0462, P0463 FUEL LEVEL SENSOR

PFP:25060

Component Description

UBS00DM0

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 side is
variable resistor. Fuel level sensor output voltage changes depend-
ing on the movement of the fuel mechanical float.

On Board Diagnosis Logic

UBS00DM1

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

UBS00DM2

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.
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-978, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF800Z

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0462

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

Fuel level sensor circuit 
high input

An excessively high voltage is sent from the 
sensor is sent to ECM.

SEF195Y

DTC P0462, P0463 FUEL LEVEL SENSOR

EC-977

[VG33E]

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Wiring Diagram

UBS00DM3

BBWA1089E

EC-978

[VG33E]

DTC P0462, P0463 FUEL LEVEL SENSOR

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

UBS00DM4

1. 

CHECK FUEL LEVEL 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 G 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 M67, C1

●

Harness for open or short between combination meter and fuel level sensor unit

>> Repair open circuit or short to ground or short to power in harness or connectors.

3. 

CHECK FUEL LEVEL 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.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

46

G

Fuel level sensor

[Ignition switch: ON]

Approximately 0 - 4.8V
Output voltage varies with fuel 
level.

66

B

Fuel level sensor 
ground

[Engine is running]

●

Idle speed

Approximately 0V

Voltage: Approximately 12V

PBIB1427E

Continuity should exist.