Sorry if the answer is already in a previous thread but could not find it in my search. I was looking for detailed instructions on how to remove the TCU from my 2005 STR6 Roadster. I purchased the ECU/TCU tune from EC and need to get it shipped. Thanks in advance.

 

1) disconnect the Neg battery terminal
2) make sure you've completed #1

3) pull back the carpet in the passenger footwell. There you will see a white foam core approx 1"thick.

4) remove the foam and set aside
5) using a 10mm socket remove the 3 nuts
1 on top/1 left/ 1 right

Note the right one is out of sight line don't drop it, it's hard to fish back out (this is from experience)

The backing plate contains the TCU and the AMP. If you haven't done step 1, do it now.

6) fold the plate down, you'll have to pull it forward from the top and then lift it off of the lower bolts
7) snap a few pics of the TCU with the plate down.

Keeping the TCU in place are 2 torx Screws. (I think the torx heads are #27)

8) remove both screws and cut the 2 zip ties (you'll see them and be careful to NOT cut and wires.)
9) unplug the TCU

Take a few images of the zip ties as you'll need to install new ones. Installing them back onto the unit, it's not intuitive. That's why you should snap a few pics. It easier to install them into the backer plate and bring them through the TCU and then around the wire loom.

 

I neglected to mention

Download the service manual.

There are numerous links to it on the site .

 

Thanks for the detailed instructions UrbanE. That will definitely help.