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HOMESERVICE MANUALSHONDA2011CR-V EX, 2.4 RE3, MZJAREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMFUEL SUPPLY SYSTEMFUEL GAUGE SENDING UNIT TEST
2011 Honda CR-V EX, 2.4 RE3, MZJA

Fuel Gauge Sending Unit Test

2011 Honda CR-V EX, 2.4 RE3, MZJASECTION Fuel Gauge Sending Unit Test
NOTE: For the fuel gauge system circuit diagram, refer to the Gauges Circuit Diagram (see CIRCUIT DIAGRAM ).
  1. Check the No. 10 METER (7.5 A) fuse in the under-dash fuse/relay box before testing.
  2. Check for body electrical system DTCs with the HDS.
    • If no problem is found, go to step 3.
    • If DTC B1175 or B1176 is indicated, go to the indicated DTC's troubleshooting.
  3. Turn the ignition switch to LOCK (0).
  4. Fold the driver's side rear seat forward, and pull back the carpet to expose the access panel.
  5. Remove the access panel (A) from the floor.
    Fig 1: Identifying Access Panel And Fuel Tank Unit 4P Connector
    G06610600Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Disconnect the fuel tank unit 4P connector (B).
  7. Measure the voltage between fuel tank unit 4P connector terminals No. 1 and No. 3 with the ignition switch to ON (II). There should be battery voltage.
    • If the voltage is OK, go to step 8.
    • If the voltage is not as specified, check for:
      • a short in the LT BLU wire to ground.
      • an open in the LT BLU or ORN wire.
    Fig 2: Identifying Fuel Tank Unit 4P Connector Terminals
    G06610601Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Turn the ignition switch to LOCK (0).
  9. Remove the fuel tank unit from the fuel tank (see FUEL TANK UNIT REMOVAL AND INSTALLATION ).
  10. Measure the resistance between fuel tank unit 4P connector terminals No. 1 and No. 3 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 (see FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT ).

    FLOAT POSITION CHART

    Float Position F 8.7 in (221.5 mm) 1/2 6.3 in (160.1 mm) LOW 2.7 in (68.4 mm) E 1.7 in (42.7 mm)
    Resistance (Ω) 19 to 21 202.6 to 212.6 566.6 to 660.2 772 to 788
    Fig 3: Measuring Resistance Between Fuel Tank Unit 4P Connector Terminals No. 1 And No. 3
    G06610602Courtesy of AMERICAN HONDA MOTOR CO., INC.
  11. Reconnect the fuel tank unit 4P connector.
  12. Remove the No. 23 BACK UP (10 A) fuse from the under-hood fuse/relay box for at least 10 seconds, then reinstall it.
  13. Turn the ignition switch to ON (II).
  14. Check that the pointer of the fuel gauge indicates F with the float at F.
  • If the pointer of the fuel gauge does not indicate F, replace the gauge control module.
  • If the gauge is OK, the test is complete.
NOTE:
  • The pointer of the fuel gauge returns to the bottom of the gauge dial when the ignition switch is in LOCK (0), regardless of the fuel level.
  • Remove the No. 23 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.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.