Fuel Gauge

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

Depending on vehicle position or driving circumstance, the fuel in the tank shifts and the pointer may fluctuate.
If the vehicle is fueled with the ignition switch ON, the pointer will move slowly.

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

Select "METER A/C AMP" on CONSULT-III.
Using "FUEL METER" on the data monitor, compare the value o data monitor with fuel gauge pointer of combination meter.

UNIFIED METER AND A/C AMP. INPUT SIGNAL

Fuel gauge pointer	Reference value of data monitor (lit.) (Approx.)
Full	81
Three quarters	61
Half	41
One quarter	21
Empty	2

OK or NG

OK: GO TO 2.

NG: Replace the combination meter. Refer to "COMBINATION METER ".

CHECK FUEL LEVEL SENSOR
Check components. Refer to "FUEL LEVEL SENSOR UNIT CHECK ".

OK or NG

OK: GO TO 3.

NG: Replace the fuel level sensor unit, refer to "REMOVAL AND INSTALLATION ".
CHECK FUEL LEVEL SENSOR CIRCUIT 1
1. Disconnect fuel level sensor unit and fuel pump connector B16 and unified meter and A/C amp. connector M50.
2. Check continuity between fuel level sensor unit and fuel pump harness connector B16 terminal 2 and unified meter and A/C amp. harness connector M50 terminal 28.
  
  Fig 1: Checking Continuity Between Fuel Level Sensor Unit And Fuel Pump Harness Connector B16 Terminal 2 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Continuity should exist.
3. Check continuity between fuel level sensor unit and fuel pump harness connector B16 terminal 2 and ground.
  Continuity should not exist.
OK or NG

OK: GO TO 4.

NG: Repair harness or connector.
CHECK FUEL LEVEL SENSOR CIRCUIT 2
1. Check continuity between fuel level sensor unit and fuel pump harness connector B16 terminal 5 and unified meter and A/C amp. harness connector M50 terminal 36.
  
  Fig 2: Checking Continuity Between Fuel Level Sensor Unit And Fuel Pump Harness Connector B16 Terminal 5 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Continuity should exist.
2. Check continuity between fuel level sensor unit and fuel pump harness connector B16 terminal 5 and ground.
  Continuity should not exist.
OK or NG

OK: GO TO 5.

NG: Repair harness or connector.
CHECK INSTALLATION CONDITION
Check fuel level sensor unit installation, and determine whether the float arm interferes or binds with any of the internal components in the fuel tank.

OK or NG

OK: Replace the unified meter and A/C amp. Refer to "UNIFIED METER AND A/C AMP. ".

NG: Install the fuel level sensor unit properly.