Injector(S), Fuel: Operation
The fuel injectors are unique to the high pressure direct injection fuel system. The fuel injectors are controlled by the Powertrain Control Module (PCM) using both a High Side Driver (HSD) and Low Side Driver (LSD) circuit for each fuel injector. The PCM operates the fuel injectors by turning on the HSD and LSD circuits simultaneously. The PCM uses a banked circuit topology on the HSD circuits. This means that fuel injectors 1 and 4 share a common HSD source inside the PCM and fuel injectors 2 and 3 share another common HSD source. Each fuel injector has a dedicated LSD circuit so that the injectors can be operated independently.
- The PCM processes the following information in order to control the quantity of fuel to inject:
- Accelerator pedal position
- Air temperature
- Battery voltage
- Coolant temperature
- Engine RPM
- Mass air flow
- Oxygen sensor
- Turbocharger boost pressure
The "Fuel Adaptive Parameter Reset" and "Fuel Feed System Component Replacement" scan tool procedures should always be run after a PCM, fuel injector, fuel rail, high pressure pump or fuel pressure sensor is replaced. The procedures should be in the "Miscellaneous Functions" tab in the PCM. Failure to run the procedures may cause DTCs to set in the PCM.