Fuel Pump: Testing and Inspection

Transfer Fuel Pump Test

Special Tools Required

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

NOTE: If the fuel tank is full, drain the fuel Service and Repair.

1. Remove the fuel tank unit Fuel Tank Unit Removal/Installation.

2. Disconnect the transfer tube (A), then connect a vacuum pump/gauge, 0-30 inHg, to the fuel tank unit.






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.






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 Fuel Tank Unit Removal/Installation, then recheck the fuel vacuum.

8. Connect the vacuum pump/gauge to the transfer tube.





9. Apply vacuum to the transfer tube.

- If the vacuum holds, replace the fuel tank Removal and Replacement.
- If the vacuum does not hold, the transfer fuel pump and the transfer tube are OK.