Transmission Fluid Temperature (TFT) Sensor

DESCRIPTION
is located on the transmission main control body. It is a temperature-sensitive device called a thermistor. The resistance value of the TFT will vary with temperature change. The powertrain control module monitors the voltage across the TFT to determine the temperature of the transmission fluid.

The PCM uses this initial signal to determine whether a cold start shift schedule is necessary. The cold start shift schedule allows quicker shifts when the transmission fluid temperature is cold. The PCM also inhibits torque converter clutch operation at low transmission fluid temperatures. Corrects EPC pressures for temperature.

SYMPTOMS
Torque converter clutch engagement and stabilized shift schedules happen too soon after a cold start. Harsh or soft shifts.

DTCs
P0712, P0713, P1711, P1783