More recent kinds of automatic transmission, such as the semi-guide gearbox and CVT use other methods of energy shipping and delivery, and don't incorporate torque converters. The PCM/TCM is not going to established a DTC unless there is a problem Using the electrical circuit controlling the torque converter clutch solenoid. https://torque-converter-clutch20741.blogoxo.com/34143792/torque-converter-clutch-options