Fuel Pump Test

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Honda S2000, 2004 Honda S2000, 2003 Honda S2000, 2002 Honda S2000, and 2001 Honda S2000. However, it is still accessible from the selected car via links, so may be relevant.

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 ignition switch is first turned on. If the fuel pump does not make noise, check as follows:

Remove the rear tray (see TRIM REMOVAL/INSTALLATION - REAR TRAY AREA ).
Remove the access panel from the floor.
Turn the ignition switch OFF.
Disconnect the fuel pump 5P connector.
Connect the PGM-FI main relay 7P connector terminals No. 4 and No. 5 with a jumper wire.

Fig 1: Connecting PGM-FI Main Relay 7P Connector Terminals No. 4 And No. 5 With A Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch ON (II).
Check that battery voltage is available between fuel pump 5P connector terminal No. 5 and body ground when the ignition switch is turned ON (II).
- If battery voltage is available, check the fuel pump ground. If the ground is OK, replace the fuel pump (see FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT ).
- If there is no voltage, check the wire harness (see PGM-FI MAIN RELAY CIRCUIT TROUBLESHOOTING ).
  
  Fig 2: Checking Fuel Pump Connector
  Courtesy of AMERICAN HONDA MOTOR CO., INC.