LH7 Fuel System Diagram
| Callout | Component Name |
|---|---|
| 1 | Fuel Pump Driver Control Module |
| 2 | Fuel Tank |
| 3 | Electric Fuel Pump |
| 4 | Fuel Filter Assembly |
| 5 | Fuel Heater/Fuel Temperature Sensor/Water in Fuel Sensor |
| 6 | Fuel Pressure Sensor |
| 7 | Fuel Injection Pump |
| 8 | Fuel Pressure Regulator 1 (Located in Fuel Injection Pump) |
| 9 | Dual Fuel Rail Pressure Sensor (Contains Fuel Rail Pressure Sensor 1 and Fuel Rail Pressure Sensor 2) |
| 10 | Fuel Rail |
| 11 | Fuel Pressure Regulator 2 |
| 12 | Fuel Injectors |
The fuel tank stores the fuel supply and contains an electric fuel pump that is controlled by the fuel pump driver control module and engine control module. Fuel is pumped from the fuel tank through the fuel feed line to the fuel filter assembly. The fuel filter assembly consists of a fuel filter/water separator, fuel heater, fuel temperature sensor, and a water in fuel sensor. Fuel flows out of the fuel filter assembly through the rear fuel feed pipe to the fuel pressure sensor and then to the high pressure fuel pump. High pressure fuel is supplied through the high pressure fuel line to the fuel rails and then through the fuel injector lines to the fuel injectors. High pressure fuel is controlled by the ECM, fuel pressure regulator 1 and fuel pressure regulator 2. Excess fuel returns to the fuel tank through the fuel return pipes.