Transmission Fluid Temperature (TFT) Sensor

The transmission fluid temperature (TFT) sensor is located on the internal wiring harness to the solenoid valves in the fluid pan.

It is a resistor and measures the transmission fluid temperature.

The transmission fluid temperature is used by the PCM for the following functions:

• Applying the torque converter clutch is not permitted until the transmission fluid reaches a certain temperature.
• Engagement of 4th gear is prevented in extreme sub-zero temperatures until the normal operating temperature is reached.
• If the transmission fluid temperature is excessive, a pre-set fixed shift curve is selected and the torque converter lock-up clutch is closed in 2, 3 and 4, and the transmission warning indicator is activated. No substitute signal is available for the TFT sensor.