Transmission Fluid Temperature (TFT) Sensor

• The transmission fluid temperature (TFT) sensor is a thermistor-type sensor that varies a reference voltage signal. The resistance in the TFT sensor varies with temperature. The PCM monitors the voltage signal across the TFT sensor, and uses this information to determine the transmission fluid temperature.
• The TFT sensor is located on the solenoid body.
• The PCM uses the TFT sensor signal to help determine shift scheduling, torque converter clutch operation and pressure control requirements.

It sends a voltage signal to the PCM. The voltage signal varies with transmission fluid temperature. The PCM uses this signal to determine whether a cold start shift schedule is necessary. The shift schedule is compensated when the transmission fluid temperature is cold. The PCM also inhibits TCC operation at low transmission fluid temperatures and determines PC solenoid operations.