July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
DTC Control Unit (Ram), Control Unit (ROM): Description
WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The unit controls the A/T.
Fig 1: View Of DTC Control Unit (RAM), Control Unit (ROM)