Fuel Pump Module
| ITEM | DESCRIPTION |
|---|---|
| 1 | Pipe connection - fuel vapor to evaporative emissions canister |
| 2 | Fuel supply connection |
| 3 | Fuel level sensor electrical connector |
| 4 | Fuel pump electrical connector |
| 5 | Fuel Fired Booster Heater (FFBH) supply connection |
| 6 | Fuel Fired Booster Heater (FFBH) suction tube and seal (if fitted) |
| 7 | Fuel inlet filter |
| 8 | Fuel level sensor float |
| 9 | Swirl pot |
| 10 | Active fuel level sensor - 'A' |
| 11 | Jet pump connection - left (passive) side of fuel tank |
| 12 | Locking ring and O-ring seal |
The fuel pump module is located in the right side of the tank. The fuel pump module flange is sealed to the tank with an O-ring and secured with a locking ring.
The top flange of the fuel pump module assembly provides the internal and external interface for the tank electrical and fuel connections. The flange is formed with fuel level and fuel pump external electrical connectors that are connected to the active and passive fuel level sensors, and the in-tank fuel pump.
The lower part of the fuel pump module forms the fuel swirl pot, and provides the location for the in-tank fuel pump and the two jet pumps. The swirl pot provides a constant reservoir of fuel for the engine drawn fuel supply.
The pump ensures sufficient fuel is in the swirl pot to supply the engine's High Pressure (HP) fuel pumps demands by supplying the fuel to power the jet pump venturi's. The rapid flow of fuel through the venturi nozzle creates a depression which draws fuel back across the saddle from the left (passive) side of the tank into the pump (active) side of the tank. The second venturi draws fuel from the pump side of the tank into the swirl pot. Surplus fuel entering the fuel swirl pot overflows into the usable right side of the fuel tank.
For cold climate market vehicles that feature a Fuel Fired Booster Heater (FFBH) and an auxiliary fuel pump, the fuel pump module has a separate pipe connection for a fuel supply line that connects to an auxiliary fuel pump mounted on the exterior right side of the fuel tank. This pipe connection is fitted with a sealed suction tube which draws fuel from the swirl pot. An additional fuel line connects the auxiliary fuel pump to the FFBH fuel inlet.