Fuel Gauge Sending Unit Test

Special Tools Required 

Fuel sender wrench 07AAA-S0XA100

1. Check the No. 10 METER (7.5 A) fuse in the underdash fuse/relay box before testing.
2. Do the gauge drive circuit check (see SELF-DIAGNOSTIC FUNCTION ).
   • 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 step 3.
   • If the fuel gauge needle does not sweep from the minimum to maximum position and then return to the minimum position, replace the gauge assembly and retest.
3. Turn the ignition switch OFF.
4. Remove the rear seat cushion (see REAR SEAT REMOVAL/INSTALLATION ).
5. Remove the access panel (A) from the floor.

   2002-2004 models 

   Fig 1: Removing Access Panel From Floor (2002-2004 Models)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.

   2005-2006 models 

   Fig 2: Removing Access Panel From Floor (2005-2006 Models)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
6. Disconnect the fuel pump 5P connector (B).
7. 2005-2006 models; Disconnect the EVAP canister vent shut valve and fuel tank pressure sensor subharness 6P connector (C).
8. 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 as specified, go to step 9.
   • If the voltage is not as specified, check for:
     • a short in the YEL/BLK wire to ground.
     • an open in the YEL/BLK or BLK wire.
     • poor ground (G501).
       Fig 3: Measuring Voltage Between Fuel Pump 5P Connector Terminals 1 And 2 With Ignition Switch

       Courtesy of AMERICAN HONDA MOTOR CO., INC.
9. Turn the ignition switch OFF. Remove the No. 9 BACK UP (7.5 A) fuse from the underhood fuse/relay box for at least 10 seconds, and reinstall it.
10. Install a 2 ohm resistor between the fuel pump 5P connector terminals No. 1 and No. 2, then turn the ignition switch ON (II).
    Fig 4: Installing Resistor Between Fuel Pump 5P Connector Terminals 1 And 2

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
11. 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, go to step 12.
      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.
12. Relieve the fuel pressure (see FUEL PRESSURE RELIEVING  ).
13. Remove the fuel fill cap.
14. Disconnect the quick-connect fittings from the fuel pump.
15. Using the special tool, loosen the fuel tank unit locknut (A), and remove the fuel tank unit from the fuel tank.
    Fig 5: Loosening Fuel Tank Unit Locknut Using Special Tool And Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
16. 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, 2002-2004 models (see FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT  ), 2005-2006 models (see 2005-2006 MODELS  ).

    FLOAT POSITION
    
    

    Float Position	F	1/2	LOW	E
    2002-2004 models; Resistance (ohm)	11 to 13	68.5 to 74.5	114.4 to 126.6	130 to 132
    2005-2006 models; Resistance (ohm)	11 to 13	68.5 to 74.5	114.3 to 129.5	130 to 132

    NOTE: Remove the No. 9 BACK UP (7.5 A) fuse from the underhood 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.

    2002-2004 models 

    Fig 6: Identifying Terminal Side Of Male Terminals (2002-2004 Models)

    Courtesy of AMERICAN HONDA MOTOR CO., INC.

    2005-2006 models 

    Fig 7: Identifying Terminal Side Of Male Terminals (2005-2006 Models)

    Courtesy of AMERICAN HONDA MOTOR CO., INC.