Fuel Gauge Sending Unit Test

Special Tools Required
Fuel sender wrench (  07AAA-S0XA100)
 



NOTE: For the fuel gauge system circuit diagram, refer to the Gauges Circuit Diagram.

1.Check the No. 10 METER (7.5 A) fuse in the under-dash fuse/relay box before testing.

2.Do the gauge drive circuit check.

  • If the fuel gauge needle sweeps from the minimum to maximum position and then returns to the minimum position, the gauge is OK. Go to 3.
  • If the fuel gauge needle does not sweep correctly, replace the gauge assembly and retest.

3.Turn the ignition switch OFF.

4.Fold the rear seats forward, and pull back the carpet to expose the access panel.

5.Remove the access panel (A) from the floor.

 

6.Disconnect the fuel pump 5P connector (B).

7.Measure voltage between the fuel pump 5P connector terminals No. 1 and No. 2 with the ignition switch ON (II). There should be battery voltage.

  • If the voltage is OK, go to 8.
  • If the voltage is not as specified, check for:
    • a short YEL/BLK to ground.
    • an open in the YEL/BLK or BLK wire.
    • poor ground (G551).

 

8.Turn the ignition switch OFF. Remove the No. 9 BACK UP (10 A) fuse from the under-hood fuse/relay box for at least 30 seconds, then reinstall it.

9.Install a 2 W resistor between the fuel pump 5P connector terminals No. 1 and No. 2, then turn the ignition switch ON (II).

 

10.Check that the pointer of the fuel gauge indicates ‘‘F''.

  • If the pointer of the fuel gauge does not indicate ‘‘F'', replace the gauge.
  • If the gauge is OK, inspect the fuel gauge sending unit.

NOTE: The pointer of the fuel gauge returns to the bottom of the gauge dial when the ignition switch is OFF, regardless of the fuel level.

11.Remove the fuel fill cap.

12.Disconnect the quick-connect fittings from the fuel pump.

13.Using the tool, loosen the locknut (A), and remove the fuel pump assembly from the fuel tank.

 

14.Measure resistance between the No. 1 and No. 2 terminals with the float at E (EMPTY), 1/2 (HALF FULL), and F (FULL) positions.
If you do not get the following readings, replace the fuel gauge sending unit.

Float Position F
230 mm (9.1 in.) 
1/2
167.5 mm (6.6 in.) 
LOW
68.1 mm (2.7 in.) 
E
43.6 mm (1.7 in.) 
Resistance (W11
to 13 
70.7
to 76.1 
117.7
to 127.5 
130
to 132 

NOTE: Remove the No. 9 BACK UP (10 A) fuse from the under-hood fuse/relay box for at least 10 seconds after completing troubleshooting otherwise it may take up to 20 minutes for the fuel gauge to indicate the correct fuel level.