The coolant temperature sensor (CTS) is a heat-sensing device that is used to measure the temperature of the engine coolant. This information is used by the engine computer to control the fuel injection system and the ignition timing.
Here are additional specific functions:
- Provides information to the PCM: The Coolant Temperature Sensor sends
a voltage signal to the PCM that corresponds to the temperature of
the coolant
- Adjusts fueling: This helps the PCM calculate how much fuel to inject
into the engine
- Provides intake timing data: This gives the PCM precise data required
to time ignition pulses
