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: Electronic Component Description
| Circuit | Description |
|---|---|
| 5 V Reference | Regulated voltage supplied by the control module.K20 Engine Control Module |
| Signal 1 - Terminal 2 @ B303 Transmission Range Sensor | The control module input circuit has an internal resistance connected to 5 V.K71 Transmission Control Module |
| Signal 2 - Terminal 3 @ B303 Transmission Range Sensor | The control module input circuit has an internal resistance connected to 12 V.K20 Engine Control Module |
| Low Reference | Grounded through the control module.K20 Engine Control Module |
| Component | Description |
|---|---|
| B303 Transmission Range Sensor | The hall-effect sensor has 2 separate PWM signal circuits. |
| 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. |
| K71 Transmission Control Module | The control module contains a microprocessor used to process input data to control outputs. The control module receives information from a variety of sensors, switches and serial data information from other control modules. This information is used to control a combination of solenoid valves to obtain the correct line pressure, gear ratio and torque converter clutch operation. |
- The control module K71 uses the information from the sensor signal 1 to determine what transmission gear range the vehicle operator selected.
- The control module K20 uses the information from the sensor signal 2 to determine if the transmission is in neutral or park to enable the starter.