Transmission Fluid Temperature (TFT) Sensor

DESCRIPTION
The transmission fluid temperature sensor is located on the transaxle main control valve body. It is a temperature-sensitive device called a thermistor. The resistance value of the TFT will vary with transmission fluid temperature change. The PCM monitors the voltage across the TFT to determine the temperature of the transmission fluid. The PCM uses this signal to determine whether a cold start shift schedule is necessary. The cold start shift schedule allows quicker shifts when the transmission fluid 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.

DIAGNOSTIC TROUBLE CODES
P0712, P0713, P1711, P1783