Circuit/System Description
WARNING: This page is about a different variant/trim than selected.
For an overview of the component/system, refer to: Fuel System Description
| Circuit | Description |
|---|---|
| Control - Terminal 1 | The output circuit is switched to 50 V to activate the component. |
| Control - Terminal 2 | The output circuit is switched to ground to activate the component. |
| Component | Description |
|---|---|
| K20 Engine Control Module | The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly. |
| Q17 Fuel Injector | Fuel injectors are solenoid valves that inject fuel either into the intake system or directly into the cylinder. The amount of fuel injected depends on the length of the electrical pulse that is applied. |
To minimize engine vibrations at idle the engine control module can detect even small variations in engine speed and compensates these variations by adjusting the amount of injected fuel for each cylinder individually. This smooth-running control works only inside calibrated limits.
Values that differ too much indicate that the injector is not working properly or that something is mechanically wrong with the cylinder.
- Fuel quantity based on the time the injector was turned on.
- Fuel quantity based on the increase in crankshaft speed when a specific cylinder fires.