Transmission Fluid Temperature (TFT) Sensor
WARNING: This page is about a different car, the 2008 Lincoln Navigator L and 2008 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
The transmission fluid temperature sensor is located on the TCM. The TCM uses the sensor input to activate various shift strategies. The sensor is in the form of a temperature-dependent resistor.
The resistance value of the transmission fluid temperature (TFT) sensor varies with temperature change. The TCM monitors the voltage across the TFT to determine the temperature of the transmission fluid.
The TCM uses this initial signal to determine whether a cold start shift schedule is necessary. The TCM also inhibits torque converter clutch operation at low transmission fluid temperatures.