Coolant-Temperature Sensor

Coolant-temperature sensor

The coolant-temperature sensor is screwed into the cylinder head and registers the temperature of the coolant by means of its variable resistor (NTC= negative temperature coefficient).
Among other things, the coolant temperature serves as a measured variable for the following functions:
* Start volume calculation
* Injection volume calculation
* Nominal idle speed
In the event of the coolant-temperature sensor failing, a fault code is entered in the DME control module and a substitute value is calculated from the value of the intake air temperature sensor with the aid of a temperature model.