Circuit/System Description
WARNING: This page is about a different car, the 2022 Cadillac CT5. 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. |
| Control - Component | The output circuit is switched to 12 V to activate the component. |
| Control - Relay Coil | The output circuit is switched to ground to activate the component. |
| Signal circuit terminal 32-34 X3 - Feedback 3 | The control module input circuit has an internal resistance connected to ground. |
| Signal circuit terminal 49 X1 - Feedback 2 | The control module input circuit has an internal resistance connected to ground. |
| Signal circuit terminal 49 X3 - Feedback 1 | The control module input circuit has an internal resistance connected to ground. |
| *For detailed component terminal information, refer to: Diagnostic Aids | |
| 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. |
There are 3 ignition voltage circuits supplied to 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).