Theory Of Operation

The Transmission Oil Temperature Sensor is used to determine shift schedule selection. Transmission Oil Temperature is also used in TCC operation. This DTC is checking for a slow, erratic, skewed or shifted Transmission Oil Temperature sensor that is within the passing criteria of the Transmission Oil Temperature sensor High or Low DTCs. The Transmission Control Module (TCM) monitors the transmission temperature by comparing Transmission Oil Temperature to Ambient and Engine Coolant Temperature after a cold soak, by comparing Transmission Oil temperature increases in relation to Engine temperature increases, and abnormal changes over time.