Transmission Oil Temperature Sensor
WARNING: This page is about a different car, the 2003 Jaguar XJ8, 2003 Jaguar XJ, 2002 Jaguar XJ8, 2002 Jaguar XJ, and 2001 Jaguar XJ8. However, it is still accessible from the selected car via links, so may be relevant.
A thermistor which provides an electrical indication of the oil temperature to the TCM. The signal is measured as a voltage with reference to analogue ground in the TCM.