Nissan Sentra manuals

Nissan Sentra Service Manual: Fuel level sensor signal circuit

Description

The fuel level sensor unit and fuel pump detects the approximate fuel level in the fuel tank and transmits the fuel level signal to the combination meter.

Component function check

1.Combination meter input signal

  1. Select meter/m&a on consult.
  2. Using FUEL METER of DATA MONITOR, compare the value of DATA MONITOR with fuel gauge pointer of combination meter.

Does the data monitor value approximately match the fuel gauge indication?


Does the data monitor value approximately match the fuel gauge indication? YES >> Inspection End.

NO >> Replace combination meter. Refer to MWI-77, "Removal and Installation".

Diagnosis procedure

Regarding wiring diagram information, refer to mwi-28, "wiring diagram".

1.Check fuel level sensor circuit

  1. Turn ignition switch off.
  2. Disconnect combination meter connector and fuel level sensor unit connector.
  3. Check continuity between combination meter harness connector and fuel level sensor unit harness connector.


  1. Check continuity between combination meter harness connector and ground.

Is the inspection result normal?


Is the inspection result normal? Yes >> go to 2.

No >> repair or replace harness or connector.

2.Check fuel level sensor ground circuit

  1. Check continuity between fuel level sensor unit harness connector and combination meter harness connector.


  1. Check continuity between combination meter harness connector and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 3.

NO >> Repair or replace harness or connector.

3.Check installation condition

Check fuel level sensor unit installation, and check whether the float arm interferes or binds with any of the internal components in the fuel tank.

Is the inspection result normal? Yes >> inspection end.

No >> install the fuel level sensor unit properly. Refer to fl-6, "removal and installation".

Component inspection

1.Remove fuel level sensor unit

Remove the fuel level sensor unit. Refer to fl-6, "removal and installation".

>> Go to 2.

2.Check fuel level sensor unit

Check the resistance between fuel level sensor unit and fuel pump.

*: When float rod is in contact with stopper.


*: When float rod is in contact with stopper.

Is inspection result ok?


Is inspection result ok? Yes >> inspection end.

No >> replace fuel level sensor unit and fuel pump. Refer to fl-6, "removal and installation".

Illumination control switch signal circuit
Diagnosis procedure Regarding wiring diagram information, refer to mwi-28, "wiring diagram". 1.Check combination meter input signal Turn ignition switch on. Check voltage between the ...

Parking brake switch signal circuit
Component function check 1.Check parking brake switch operation Check that brake warning lamp in combination meter turns on/off when parking brake is actuated. Is the inspection result normal? ...

Other materials:

Bcm branch line circuit
Diagnosis Procedure 1.Check connector Turn the ignition switch off. Disconnect the battery cable from the negative terminal. Check the terminals and connectors of the BCM for damage, bend and loose connection (unit side and connector side). Is the inspection result normal? YES > ...

The seat belt reminder warning continues sounding, or does not sound
Description Seat belt reminder warning does not sound. Seat belt reminder warning sounds continuously. Diagnosis procedure 1.Check seat belt warning lamp Turn ignition switch on. Check the operation of the seat belt warning lamp in the combination meter. Is the inspection ...

Both doors mirror defogger don’t operate but rear window defogger operates
Diagnosis procedure Regarding Wiring Diagram information, refer to DEF-20, "Wiring Diagram". 1. Check door mirror defogger fuse Check if the following fuse in fuse block (J/B) is blown. Is the inspection result normal? Yes >> go to 2. No >> replace the blown fuse af ...

© 2014-2024 Copyright www.nisentra.com