Transfer Fuel Pump Test

Special Tools Required 

Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially available

1. Remove the fuel tank unit (see FUEL TANK UNIT REMOVAL AND INSTALLATION ).
2. Disconnect the transfer tube (A), then connect a vacuum pump/gauge, 0-30 inHg, to the fuel tank unit.
   Fig 1: Identifying Fuel Line And Clamps

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
3. Connect the fuel tank unit 5P connector.
4. Lower the fuel tank unit (A) into the fuel tank until the pick up screen is submerged in the fuel.
   Fig 2: Identifying Fuel Joint Hose

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
5. Turn the ignition switch to ON (II).
6. From the INSPECTION MENU of the HDS, select Fuel Pump ON.
7. Read the vacuum pump/gauge. The vacuum should be 4.0 kPa (1.2 inHg, 30 mmHg).
   • If the vacuum is OK, go to step 8.
   • If the vacuum is out of specification, replace the fuel tank unit (see FUEL TANK UNIT REMOVAL AND INSTALLATION ), then recheck the fuel vacuum.
8. Connect the vacuum pump/gauge to the transfer tube.
   Fig 3: Identifying Fuel Line And Fuel Tank Unit

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
9. Apply vacuum to the transfer tube.
   • If the vacuum holds, replace the fuel tank (see FUEL TANK REPLACEMENT ).
   • If the vacuum does not hold, the transfer fuel pump and the transfer tube are OK.