coolermotors

It is located in the coolant passage of fan motor Manufacturers the internal combustion engine near the thermostat valve or in some vehicles even inside of it. The sensor keeps a tab on the operating temperature and alerts car’s computer when there is a potential overheating problem. Typically the sensor consists of two wires – one supplies a 5 volt signal to the computer and the second is connected to the ground. When the temperature is high, the internal resistance across the CTS drops. Powertrain Control Module (PCM) of the vehicle reads the voltage drop across the signal circuit and uses this input for controlling engine functionality. Some engine functions such as air-fuel ratio, fuel injection timing & ignition timing are dependent on the engine temperature. Based on the data received from engine temperature sensor, the PCM will control some of the functions of engine such as the fuel mixture, ignition timing, switching on / off of the engine cooling fan etc.