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.

• Fuel pressure test set (high pressure).

• 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 procedure

- Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] Preliminary Check

Start diagnosis

- Remove the fuel filler cap from fuel filler tube.

- Remove rear seat bench. Refer to repair information.

- 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 a 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 release buttons.





- Connect a fuel line from the Fuel pressure test set (high pressure) to the disconnected fuel return line and hold it in the measuring container.





- Press the switch on the Hand held remote control (jumper) and operate the fuel pump 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 plugged.

• Fuel pump faulty.

- If necessary, repair any pinched or plugged lines.

- Replace the fuel filter. Refer to repair information.

- Replace the fuel pump. Refer to repair information.

Assembly is performed in reverse order of removal. Note the following:

- Install the rear seat bench. Refer to repair information.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Mode 03 - Read DTC Memory.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Readiness Code.