Transmission Temperature Sensor
WARNING: This page is about a different car, the 2004 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.
The transmission oil temperature sensor (1) (Fig 1 ) is located in the shell of the electric valve control unit and is fixed to the conductor tracks.
Its purpose is to measure the temperature of the transmission oil and pass the temperature to the TCM as an input signal. It is a temperature-dependent resistor (PTC).