Coolant temperature sensor
The sensor is an NTK with a negative temperature coefficient; it is located in the coolant system. The sensor monitors the engine-coolant temperature and is linked to the engine control unit by two leads. The signal is used to control the injection duration depending on the engine temperature. The value determined is also used to control the radiator fan speed and to display the coolant temperature in the instrument cluster.
The sensor is located to the side above the gearbox on the engine block.
In the event an engine coolant temperature sensor failure, a fault code is entered in the engine control unit and a substitute value is used. The vehicle handling is negatively influenced by the substitute value in all driving states.