I have seen a lot of posts for older Acura models. I have a 2012 Acura 3.2 TL with the same battery draining issue with no help from the dealer except to just keep replacing the batter (3rd one since 2013 when I bought this car).

I want to disconnect the HFL module first.

Then, may be replace it with a newer module if it is available and does not work the same way as the old module.

 

Welcome to the forums.

This thread has been moved from the First Generation TSX Discussion (2004-2008) Forum to the car specific forum applicable to your vehicle.

 

I think this might be the part you are thinking of...Though unclear on the Battery draining issue
Part list
ELECTRICAL / EXHAUST / HEATER / FUEL : CONTROL UNIT (CABIN) (1)
39770-TK4-A42