Torque Converter Clutch Lock-Up ON (Engaging Torque Converter Clutch)
WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
The fluid pressure is applied to the lock-up fluid passage (94) in the torque converter, causing the torque converter clutch in the torque converter to be engaged and then the turbine and the torque converter cover to be engaged. The mainshaft rotates at the same speed as the engine crankshaft when the torque converter clutch in the torque converter is engaged.