Transmission Fluid Temperature Sensor
The Transmission Fluid Temperature (TFT) sensor is located on the transaxle main control body. It is a temperature-sensitive device called a thermistor. The resistance value of the TFT sensor will vary with temperature change. The PCM 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 TCC operation at low transmission fluid temperatures and corrects EPC pressures for temperature.
PCM Reset
After a PCM reset procedure, the following conditions will be met
- All DTCs cleared from PCM memory.
- All freeze frame data cleared from PCM memory.
- All oxygen sensor test data cleared from PCM memory.
- OBD-II system monitor status is reset.
- DTC P1000 set in PCM memory.
To perform PCM reset using scan tool, ensure connectors are properly connected. Program scan tool following manufacturer's instructions. Follow operating instructions from scan tool menu.
All DTCs should now be cleared from PCM memory. If concern has not been corrected or fault is still present, hard fault will immediately be reset in PCM memory.