Transmission Temperature Sensor/Switch: Description and Operation

Transmission Range Pressure Switch Circuit:

Purpose:
The Transmission Fluid Temperature (TFT) sensor is a thermistor used to indicate transmission fluid temperature.

The TFT sensor is utilized by the PCM to determine the following:
^ TCC apply and release schedules
^ Hot mode determination
^ Transmission shift quality

Operation:
High sensor resistance produces high signal input voltage which corresponds to low fluid temperature. Low sensor resistance produces low signal input voltage which corresponds to high fluid temperature.

Location:
The TFT sensor is part of the transmission range fluid pressure switch assembly. The assembly is attached to the valve body inside the transmission.