Circuit/System Description
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
For an overview of the component/system, refer to: Fuel System Description
| Circuit | Description |
|---|---|
| Control - Terminal 1 | The output circuit is switched to ground to activate the component. The output is PWM controlled. |
| Control - Terminal 2 | The output circuit is switched to 12 V to activate the component. The output is PWM controlled. |
| 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. |
| Q18 Fuel Pressure Regulator | Q18 is part of the component: G18 Fuel Pump - High Pressure The fuel pressure regulator is a diaphragm relief valve. The diaphragm has fuel pressure on one side and regulator spring pressure on the other side. The fuel pressure regulator maintains the correct fuel pressure to the fuel injection system. The fuel pressure regulator is not vacuum biased. The fuel pressure regulator maintains fuel pressure in the fuel feed pipe and the fuel rail in order to prevent long cranking times. |
The fuel pressure regulator is a part of the high pressure fuel pump. The fuel pressure regulator is the solenoid valve that controls the pressure in the fuel rail.