This vehicle came to shop about 4 moths ago with code P0740 and no lock up. We built the unit deliver the vehicle and still have same code. We change tc twice, Valve body, tcc, sol. and I know for a fack that the command is there I monitor the command at the sol.
P0740 Tcc sol. circuit
Problem
There is a command and a signal to the tcc sol. but no drop on rpm when tcc is aplied by pcm. we clear the code and it will take weeks to come back. We have done everything we can think of. Im staring to wonder if is a pcm problem.