Circuit/System Description
WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
| Circuit | Description |
|---|---|
| B+ - Relay Coil | Supplied directly from the battery. |
| B+ - Relay Switch | Supplied directly from the battery. |
| Ignition - Component - Terminal 30 | Supplied from a relay. |
| Control - Relay Coil | The output circuit is switched to ground to activate the component. |
| Component | Description |
|---|---|
| K20 Engine Control Module | The control module contains a microprocessor used to process input data to control outputs. 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. |
| KR75 Engine Controls Ignition Relay | Relays are used to control a high power circuit with a low power signal. |
3 ignition voltage circuits supply the ECM. The 3 circuits are supplied by 1 relay (s) : KR75 Engine Controls Ignition Relay
The ECM monitors and compares the voltages supplied by the relay (s).