Transmission Fluid Temperature (TFT) Sensor
WARNING: This page is about a different car, the 2005 Jaguar XJR, 2005 Jaguar XJ8, 2004 Jaguar XJR, and 2004 Jaguar XJ8. However, it is still accessible from the selected car via links, so may be relevant.
The TCM utilizes one transmission fluid temperature sensor located on the main control valve body. The TCM uses the sensor input to activate various shift strategies.
The sensor is in the form of a temperature dependent resistor. The temperature sensor performs plausibility checks on each sensor reading. Obviously, the transmission oil temperature should not jump in value excessively between sensor readings. If the inputs from the temperature sensor are outside the working range it possible that the sensor is short or open circuit.