Does anyone have any information on what one of these does? I have one on the bench that I'm playing with, I have pulled the code from the software and I'm tracing out the circuitry.  I have a wiring diagram which shows me which pin is which but I could do with some more info from someone with an FSM or who has knowledge of the 4 speed. Here in the UK we see more UFOs than we do auto transmissions.

I have a pin marked 'Light' which goes to the exterior lights system combination switch - Why???
Theres also a connection to the brake light switch - Why???
There is a lamp marked P/N but only the N switch appears to be wired to the TCM, does the lamp do anything in park???

All info gratefully received, details are being published here:

http://www.rhinopower.org/ECUs/TCM_57B40/TCM_57B40.html

I have a 95 FSM for my 95 Tracker, but it's a 3 speed auto. I've read through it for other jobs many times and never came across any info on the 4 speed auto. That must be for a 4 door? I'll check again later today and see what I can find for you.

I think its for a 95, this TCM came my way cheaply because the guy that had it didn't know what it was for. I know that there were a couple of people who were interested in fitting a 4-sp into an early model so I thought I'd have a look inside it. Suzukiinfo.com is down at the moment, I'll keep looking and see if I can find any other info.
Thanks
James

Look here.   http://www.acksfaq.com/trackerfsm.htm

Look here.   http://www.acksfaq.com/trackerfsm.htm

I couldn't find the correct info there. I have found the wiring and some diagnostics info at this site:

http://www.suzuki4x4.net/manual/

I just need to work through it and see if it answers all my questions.

Well try this one then.   http://www.acksfaq.com/96-FSM-v1-7A-pdf.htm

Well try this one then.   http://www.acksfaq.com/96-FSM-v1-7A-pdf.htm

Does that link work for you? all I get is a red x. I'll try it again when I get home.

Works for me.

I managed to download the file at home, there is a bit of info in there that should help, thanks. I still don't know why it wants to know that the headlights are on 

That is an odd one.

I've finished tracing through the circuitry now so I can associate processor pins with functions. I'll feed that into the disassembly of the code and see if any of it makes sense.