What specifically do the two temperature sensors control that are located on the upper and lower radiator hose engine housings of a 1996 Honda Accord LX 4-cylinder?

One sensor is connected to the dashboard temperature gauge to provide information to the driver. The other sensor is connected to the vehicle's computer (or ECU) which uses the information to enrich fuel-air mixture during cold starts and during warm-up and to speed up the idle for smooth running while the engine is cold. Drew