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Fuel Gauge Test

NOTE: For the fuel gauge system circuit diagram, refer to the Gauges Circuit Diagram. (see appropriate WIRING DIAGRAMS article ).
  1. Check the No. 9 BACK UP LIGHT INSTRUMENT LIGHT (7.5A) fuse in the driver's under-dash fuse/relay box before testing.
  2. Turn the ignition switch OFF.
  3. Remove the rear seats and carpet.
  4. Remove the access panel from the floor. See Fuel Line/Quick-Connect Fitting .
  5. Disconnect the fuel pump 5P connector.
  6. Measure voltage between fuel pump 5P connector terminals No. 1 and No. 2 with the ignition switch ON (II). There should be between 5 and 8 V (about 5V on '03-04 models).
    • If the voltage is as specified, go to step  9.
    • If the voltage is not as specified, go to step 7.
    Fig 1: Measuring Voltage Between Fuel Pump 5P Connector Terminals No. 1 & No. 2
    G01511761Courtesy of AMERICAN HONDA MOTOR CO., INC.
  7. Turn the ignition switch OFF. Check for continuity between fuel pump 5P connector terminal No. 1 and body ground. There should be continuity.
    • If there is continuity, go to step 8.
    • If there no continuity, check for an open in the BLK wire or a poor ground (G551).
    Fig 2: Checking For Continuity Between Fuel Pump & Body Ground
    G01511762Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Measure voltage between gauge assembly 16P connector terminal No. 11 and body ground with the ignition switch ON (II). There should be between 5 and 8 V.
    • If the voltage is as specified, check for an open in the YEL/BLU wire.
    • If the voltage is not as specified, replace the gauge assembly.
    Fig 3: Measuring Voltage Between Gauge Assembly 16P Connector Terminal No. 11 & Body Ground
    G01511763Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. Turn the ignition switch OFF.
  10. Install a 2 ohms resistor between 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 No. 1 & No. 2
    G01511764Courtesy of AMERICAN HONDA MOTOR CO., INC.
  11. Check that the pointer of the fuel gauge starts moving toward the "F" mark.
    NOTE: The pointer of the fuel gauge returns to the bottom on the gauge dial when the ignition switch is OFF, regardless of the fuel level.
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