M48 connection problem

Discussion and support for MoTeC's earlier generation ECUs

M48 connection problem

Postby MrGeeTee40 on Tue Jan 16, 2018 7:40 pm

Hey guys and girl's,

Ive been trying to connect to my m48 and am at a loss.
Heres tge situation so far:

Currently has a db9? (9-pin male connector) hard wired to tge ecu.

Running a female to female extension to get cord out of car.

Connected to other end is a male rs232 to usb.

Doesnt seem to connect when i open program up, ive tried hittinf the diagnostic option and it says ecu not connected in the grey bar at the top,
Have also tried retrieving data from ecu bht comes up with "connect ecu" and ive tried hitting that but it does nothing so not sure if thats how to connect or its a message telling me to connect.

The even weirder part is when i plug it all into the computer i get a tingle from the metal parts on the car.

Any help would be greatl appreciated.

Thanks

Mitch
MrGeeTee40
 
Posts: 3
Joined: Mon Jan 15, 2018 6:42 pm

Re: M48 connection problem

Postby AdamW on Tue Jan 16, 2018 8:50 pm

All M48’s and early M4’s didn’t have direct RS232 level comms, it used a lower voltage TTL signal. The correct Motec PCI cable is needed to connect: http://www.motec.com/ac-cc-seriallogicl ... llogic-pc/
There are other DIY methods of achieving something similar (for instance FTDI TTL-232R) but you will need to have a reasonable idea what you are doing to get that working.
Motorsport Electronics Ltd.
AdamW
Pro User
 
Posts: 265
Joined: Wed Nov 16, 2011 10:08 am

Re: M48 connection problem

Postby MrGeeTee40 on Tue Jan 16, 2018 8:54 pm

Just had a quick look and its pin 6 that goes to the earth on the car.
MrGeeTee40
 
Posts: 3
Joined: Mon Jan 15, 2018 6:42 pm

Re: M48 connection problem

Postby MrGeeTee40 on Tue Jan 16, 2018 9:00 pm

Thanks adam, well thats crappy news, 160 bucks for a cable is a little outrageous. Is there any information on doing it the otger way? Can get those cables for 45 bucks.
MrGeeTee40
 
Posts: 3
Joined: Mon Jan 15, 2018 6:42 pm

Re: M48 connection problem

Postby AdamW on Mon Jan 22, 2018 7:05 pm

Sorry for the slow reply, this forum doesnt notify me of replies so its easy to forget about...

Its been many years but from memory you need just 3 connections from the FTDI cable to the M48. (Im sure I used the 3V3 version).

Image

Note the forum software has cut the side of my image off so try right click>save image as.
Motorsport Electronics Ltd.
AdamW
Pro User
 
Posts: 265
Joined: Wed Nov 16, 2011 10:08 am

Re: M48 connection problem

Postby swade on Wed Feb 07, 2018 2:38 am

I just finally connected my M48 to a Windows 7 laptop. Actually now i have managed to connect it to two laptops. You must have Windows 7 full or professional software, Win 7 Home will not work. Using a FTDI cable as Adam mentioned and installing Virtual PC then Windows XP Mode, then running the Motec program within the XP Mode environment. This took ages to figure out and no end of clicking and a bit of swearing.

Wade
swade
 
Posts: 6
Joined: Mon Apr 20, 2015 10:27 am
Location: Kopervic, Norway


Return to M4 and M48 ECUs (including M2R and MLS variants)

Who is online

Users browsing this forum: No registered users and 4 guests