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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 (see CIRCUIT DIAGRAM ).
  1. Check the No. 6 fuse in the under-dash fuse/relay box before testing.
  2. Remove the middle floor panel (see MIDDLE FLOOR PANEL REPLACEMENT ).
  3. Remove the access panel from the floor.
  4. Turn the ignition switch OFF, then disconnect the fuel pump 5P connector.
  5. Measure voltage between fuel tank unit 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 step 6.
    • If the voltage is not OK, check for:
      • an open in the YEL/BLK or BLK wire.
      • poor ground (G 502).
    Fig 1: Measuring Voltage Between Fuel Tank Unit 5P Connector Terminals No. 1 And No. 2
    G03681077Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Turn the ignition switch OFF. Remove the No. 18 (7.5 A) fuse from the under-dash fuse/relay box for at least 10 seconds, then reinstall it.
  7. Install a 2 ohm, resistor between fuel tank unit 5P connector terminals No. 1 and No. 2, then turn the ignition switch ON (II).
    Fig 2: Installing 2 ohm, Resistor Between Fuel Tank Unit 5P Connector Terminals No. 1 And No. 2
    G03681078Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Check that the pointer of the fuel gauge starts moving toward the "F" mark.
    • If the pointer does not move, replace the gauge.
    • If the gauge is OK, inspect the fuel gauge sending unit.
    NOTE:
    • Turn the ignition switch OFF before the pointer reaches "F" on the gauge dial. Failure to do so may damage the fuel gauge.
    • The fuel gauge is a bobbin (cross-coil) type; the fuel level is continuously indicated even when the ignition switch is OFF, and the pointer moves more slowly than on other gauges.
  9. Turn the ignition switch OFF.
  10. Remove the fuel tank; 2000-2005 models (see 2000-2005 MODELS  ), 2006 model (see 2006 MODEL  ),
  11. Disconnect the quick-connect fittings from the fuel tank unit.
  12. Using the special tool, loosen the locknut (A), and remove the fuel tank unit from the fuel tank.
    Fig 3: Loosening Locknut And Removing Fuel Tank Unit With Specified Torques
    G03681079Courtesy of AMERICAN HONDA MOTOR CO., INC.
  13. Measure resistance between fuel tank unit 5P connector terminals No. land No. 2 with the float at E (EMPTY), LOW (LOW FUEL INDICATOR), 1/2 (HALF FULL), and F (FULL) positions.

    If you do not get the following readings, replace the fuel gauge sending unit; 2000-2005 M/T models (see 2000-2005 M/T MODELS  ), CVT model, 2006 M/T model (see CVT MODEL, 2006 M/T MODEL  ).

    TERMINALS RESISTANCE

    Float Position E 1/2 LOW F
    Resistance ohm 130 to 132 65 to 71 118 to 124 11 to 13
    Fig 4: Measuring Resistance Between Fuel Tank Unit 5P Connector Terminals No. 1 And No. 2
    G03681080Courtesy of AMERICAN HONDA MOTOR CO., INC.
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