Generic Scan Tool - Fuel Supply

Fuel Pump Delivery Quantity, Checking

Special tools, testers and auxiliary items required
- Hand held remote control (jumper).
- Multimeter.
- Electrical connector test lead set.

Test conditions
- Battery voltage 12.5 V.
- Fuse SD12 OK.
- Fuse SF6 OK.
- Fuse SC1 OK.
- Fuel Pump (FP) Control Module J538 OK.
- Fuel filter OK.
- Ignition switched off.

Test sequence
- Remove the rear seat bench.







- Remove the left locking flange cover - arrows -.







- Disconnect the Transfer Fuel Pump (FP) G6 electrical harness connector - arrow -.







- Connect a Hand held remote control (jumper) to terminal - 1 - of the Transfer Fuel Pump (FP) G6 and to vehicle battery (+).
- Connect a jumper cable from a Electrical connector test lead set to terminal - 4 - of the Transfer Fuel Pump (FP) G6 and to vehicle Ground (GND).







- Remove fuel filler cap from fuel filler tube.
- Remove the engine cover - arrows -.

CAUTION: The fuel system is under pressure. Before opening system, place rags around the connection area. Then release pressure by carefully loosening the connection.







- Disconnect the fuel return line - arrow -.







- Connect a Fuel pressure test set (high pressure) to the disconnected fuel return line and hold it in the measuring container - arrow -.
- Press the switch on the Hand held remote control (jumper) and slowly close the shut-off valve of the fuel pressure gauge.
- Specified value: 4 Bar positive pressure.
- With the shut-off valve of the fuel pressure gauge in the same position.
- Empty 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/15 s).

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.

Final procedures
After repair work, the following work steps must be performed in the mentioned 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. Monitors, Trips, Drive Cycles and Readiness Codes

- End of diagnosis