Fuel Pump Delivery Quantity, Checking

Fuel Pump Delivery Quantity, Checking

Special tools, testers and auxiliary items required

• Hand held remote control (jumper).

• Multimeter.

• Electrical connector test lead set.

• Measuring container, fuel-resistant.

Test conditions

• Battery voltage 12.5 V

• Fuel filter OK

• Fuel tank at least 1/4 filled.

• Fuel pressure regulator OK.

• Ignition switched off.

Test sequence

- Remove the fuel filler cap from fuel filler.

- Remove rear seat bench.

- Remove cover retainers - arrows - from the right sealing flange.





- Disconnect the electrical harness connector - arrow - from the fuel delivery unit.





- Connect a Hand held remote control (jumper) to terminal - 1 - of the fuel delivery unit and to vehicle battery (+).

- Connect a jumper cable from an Electrical connector test lead set to terminal - 5 - of the fuel delivery unit and to vehicle Ground (GND).





Fuel system is under pressure! Before opening the system, place rags around the connection area. Then release the pressure by carefully loosening the connection.

- Disconnect the fuel return line - arrow - by pressing the release button.





- Connect the Fuel pressure test set (high pressure) onto the disconnected fuel return line.





- Press switch on remote control for 15 seconds.

- Compare quantity of fuel delivered with minimum delivery rate in the diagram (cm3/15s).





• Voltage at the fuel pump with engine stopped and fuel pump running is approx. 2 volts less than battery voltage.

If minimum delivery quantity is not obtained, the following malfunctions may be present:

• Fuel lines pinched.

• Fuel filter clogged.

• Fuel pump faulty.

Assembly is performed in reverse order of removal.

End of procedure