Transfer Fuel Pump Test

Special Tools Required 

Vacuum pump/gauge, 0-30 in.Hg, Snap-on YA4000A or equivalent, commercially available

1. Remove the fuel tank unit (see FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT  ).
2. Disconnect the transfer tube (A), then connect a vacuum pump/gauge, 0-30 in.Hg, to the fuel tank unit.
   Fig 1: Identifying Transfer Tube

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
3. Connect the fuel pump 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 Tank Unit

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
5. Turn the ignition switch ON (II).
6. From the INSPECTION MENU of the HDS, select Fuel Pump ON.
7. Read the vacuum pump/gauge, 0-30 in.Hg. The vacuum should be 4.0 kPa (1.2 in.Hg, 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 PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT  ), then recheck the fuel vacuum.
8. Connect a vacuum pump/gauge, 0-30 in.Hg, to the transfer tube.
   Fig 3: Connecting Vacuum Pump/Gauge To Transfer Tube

   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.