Fuel Pump (FP) Delivery Quantity, Checking

Fuel Pump (FP) 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 sequence
- Remove the fuel filler cap from fuel filler tube.
- 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 a Electrical connector test lead set to terminal - 5 - of the fuel delivery unit and to vehicle Ground (GND).

CAUTION: 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 (cu.cm/15s).

NOTE: 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.
- Replace the fuel pump.

Assembly is performed in reverse order of removal. Note the following:
- Install the rear seat bench.

Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Diagnostic Mode 03 - Read DTC Memory
2. If necessary, erase the DTC memory. Diagnostic Mode 04 - Erase DTC Memory
3. If the DTC memory was erased, generate readiness code.

- End of diagnosis.