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Home >> Acura >> 2003 >> RSX Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Supply System >> Fuel Pump Circuit Troubleshooting >> 2005-2006 models

2005-2006 models

If you suspect a problem with the fuel pump, check that the fuel pump actually runs; when it is on, you will hear some noise if you listen to the fuel fill port with the fuel fill cap removed. The fuel pump should run for 2 seconds when the ignition switch is first turned on. If the fuel pump does not make noise, check as follows:

  1. Turn the ignition switch OFF.
  2. Remove the glove box (see GLOVE BOX REMOVAL/INSTALLATION ), then remove PGM-FI main relay 2 (FUEL PUMP) (A).
    Fig 1: Removing PGM-FI Main Relay 2 (Fuel Pump)
    G03651038Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Turn the ignition switch ON (II).
  4. Measure voltage between PGM-FI main relay 2 (FUEL PUMP) 5P connector terminal No. 5 and body ground.
    Fig 2: Measuring Voltage Between PGM-FI Main Relay 2 Connector Terminal 5 And Body Ground
    G03651039Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES -  Go to step 5.
    2. NO -  Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and PGM-FI main relay 2 (FUEL PUMP).
  5. Measure voltage between PGM-FI main relay 2 (FUEL PUMP) 5P connector terminal No. 1 and body ground.
    Fig 3: Measuring Voltage Between PGM-FI Main Relay 2 Connector Terminal 1 And Body Ground
    G03651040Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES -  Go to step 6.
    2. NO -  Repair open in the wire between the underdash fuse/relay box and PGM-FI main relay 2 (FUEL PUMP).
  6. Turn the ignition switch OFF.
  7. Jump the SCS line with the HDS.
  8. Disconnect ECM/PCM connector E (31P).
  9. Check for continuity between PGM-FI main relay 2 (FUEL PUMP) 5P connector terminal No. 3 and ECM/PCM connector terminal E17.
    Fig 4: Checking Continuity Between PGM-FI Main Relay 2 Connector Terminal 3 And ECM/PCM Connector Terminal E17
    G03651041Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES -  Go to step 10.
    2. NO -  Repair open in the wire between PGM-FI main relay 2 (FUEL PUMP) and the ECM/PCM (E17).
  10. Reinstall PGM-FI main relay 2 (FUEL PUMP).
  11. Connect ECM/PCM connector terminal E7 to body ground with a jumper wire.
    Fig 5: Connecting ECM/PCM Connector Terminal E7 To Body Ground With A Jumper Wire
    G03651042Courtesy of AMERICAN HONDA MOTOR CO., INC.
  12. Turn the ignition switch ON (II).
  13. Measure voltage between ECM/PCM connector terminal E17 and body ground.
    Fig 6: Measuring Voltage Between ECM/PCM Connector Terminal E17 And Body Ground
    G03651043Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES -  Go to step 14.
    2. NO -  Replace PGM-FI main relay 2 (FUEL PUMP).
  14. Turn the ignition switch OFF.
  15. Remove the jumper wire, and reconnect ECM/PCM connector E (31P).
  16. Open the SCS line with the HDS.
  17. Turn the ignition switch OFF.
  18. Turn the ignition switch ON (II), and measure voltage between ECM/PCM connector terminal E17 and body ground within the first 2 seconds after the ignition switch was turned on.
    Fig 7: Measuring Voltage Between ECM/PCM Connector Terminal E17 And Body Ground
    G03651044Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES -  Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see HOW TO UPDATE THE ECM/PCM ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see ECM/PCM REPLACEMENT ).
    2. NO -  Go to step  20 .
  19. Turn the ignition switch OFF.
  20. Remove the rear seat cushion (see REAR SEAT REMOVAL/INSTALLATION ).
  21. Remove the access panel from the floor.
  22. Measure voltage between fuel pump 5P connector terminal No. 5 and body ground within the first 2 seconds after the ignition switch was turned on.
    Fig 8: Measuring Voltage Between Fuel Pump 5P Connector Terminal 5 And Body Ground
    G03651045Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES -  Go to step  28 .
    2. NO -  Go to step 23.
  23. Turn the ignition switch OFF.
  24. Remove PGM-FI main relay 2 (FUEL PUMP).
  25. Connect PGM-FI main relay 2 (FUEL PUMP) 5P connector terminals No. 1 and No. 2 with a jumper wire.
    Fig 9: Connect PGM-FI Main Relay 2 Connector Terminals 1 And 2 With A Jumper Wire
    G03651046Courtesy of AMERICAN HONDA MOTOR CO., INC.
  26. Turn the ignition switch ON (II).
  27. Measure voltage between fuel pump 5P connector terminal No. 5 and body ground.
    Fig 10: Measuring Voltage Between Fuel Pump 5P Connector Terminal 5 And Body Ground
    G03651047Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES -  Replace PGM-FI main relay 2 (FUEL PUMP).
    2. NO -  Repair open in the wire between PGM-FI main relay 2 (FUEL PUMP) and the fuel pump 5P connector.
  28. Turn the ignition switch OFF.
  29. Check for continuity between fuel pump 5P connector terminal No. 4 and body ground.
    Fig 11: Checking Continuity Between Fuel Pump 5P Connector Terminal 4 And Body Ground
    G03651048Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES -  Replace the fuel pump.
    2. NO -  Repair open in the wire between the fuel pump 5P connector and G501.
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