Some key functions of a Coolant Temperature Sensor in a cotton picker include:

1. Monitoring engine coolant temperature: The sensor continuously monitors the temperature of the engine coolant in the cotton picker. It ensures that the coolant remains within the optimal temperature range for proper engine operation.

2. Regulating engine performance: Based on the data received from the Coolant Temperature Sensor, the control system the cotton picker can adjust the engine performance to optimize fuel efficiency and reduce emissions. This can include adjusting fuel-air mixture, ignition timing, or cooling system operation.

3. Preventing overheating: The Coolant Temperature Sensor helps prevent the engine from overheating by detecting temperature abnormalities and triggering alerts if the coolant temperature rises above safe levels. This prompt warning allows the operator to take action, such as stopping the machine or reducing workload, to prevent potential engine damage.