Transmission Temperature Sensor/Switch: Description and Operation

LOCATION

The Transmission Oil Temperature (TOT) Sensor is located on the transmission body.

DESCRIPTION

This device is a temperature sensitive thermistor.

OPERATION

With varying temperature, the resistance value of the TOT will change. The Powertrain Control Module (PCM) monitors the voltage across the TOT to determine the temperature of the transmission oil.

The PCM uses the TOT signal to determine if a "cold start" shift schedule is necessary.

The shift schedule is compensated when the transmission fluid temperature is cold. The PCM strategy will also prevent converter clutch engagement when the fluid is cold.