97+ aw4 to 88 ax15.. what do I do with the aw4 wiring?

[0regon]

Hi.

This might be more a question to post on Naxja but we all know how much better answers are here..

I'm doing a 97+ swap on my 88 mj 

the xj is a 98 with aw4, the mj had a stock 4.0 and ax15. 

I'm keeping the ax15.

My question is do I need to do anything with the aw4 wiring or TCM?   If I'm understanding correctly, the ECU and the TCM work independently from each other, so if I leave the TCM out will I have any trouble on the engine side?

 

Thanks