SMG II gear change problems

NZ_M3 · 05-04-2012, 05:25 AM

What software was used to reset the SMG system?

I've tried quite a few of them and in my opinion only the GT1 and ISTA works - the rest are rubbish (even INPA with its automated reset function).

If not done correctly and not done in the correct order it simply won't operate properly.

Here's the correct order for the reset:

1. Teach in clutch characteristic curve
2. adapt transmission fully
3. teach in clutch slip point
4. offset longitudinal sensor reset
5. Reset clutch values (under the GT1 this is under a different function within the menu - this is NOT under the standard SMG service menu, it is elsewhere).

My experience is if you don't do #5 above, there's really little point in doing 1 to 4 - as it simply means the system values are still operated against the 'old' clutch adaptation values (i.e. the compensating values stored long term) - so it'll still drive like arse.

when I get sometime I'll post up where to find this adaptation reset (I can't remember it off the top of my head right now).

Also when the SMG pump fluid was changed, was it bled properly with the proper tool?? See below for all the functions:

http://www.cslregister.com/forum/showthread.php?t=5160

For clutch test:

http://www.cslregister.com/forum/showthread.php?t=6164

Otherwise as Bounce stated, could be as simple as the gear positioning sensor (although being a 2nd to 3rd gear thing only, it seems unlikely, as that would mean 4th to 5th would be doing the same thing). The sensor itself houses two sensors within, one does the selection angle and the other shift travel - seems weired it is only doing it on 2nd to 3rd if it is sensor related.

05-04-2012, 05:25 AM	#21
NZ_M3 S5, Sport On, DSC M-track Join Date: Jun 2008 Location: Auckland, New Zealand Posts: 1,434 Casino cash: $13579	What software was used to reset the SMG system? I've tried quite a few of them and in my opinion only the GT1 and ISTA works - the rest are rubbish (even INPA with its automated reset function). If not done correctly and not done in the correct order it simply won't operate properly. Here's the correct order for the reset: 1. Teach in clutch characteristic curve 2. adapt transmission fully 3. teach in clutch slip point 4. offset longitudinal sensor reset 5. Reset clutch values (under the GT1 this is under a different function within the menu - this is NOT under the standard SMG service menu, it is elsewhere). My experience is if you don't do #5 above, there's really little point in doing 1 to 4 - as it simply means the system values are still operated against the 'old' clutch adaptation values (i.e. the compensating values stored long term) - so it'll still drive like arse. when I get sometime I'll post up where to find this adaptation reset (I can't remember it off the top of my head right now). Also when the SMG pump fluid was changed, was it bled properly with the proper tool?? See below for all the functions: http://www.cslregister.com/forum/showthread.php?t=5160 For clutch test: http://www.cslregister.com/forum/showthread.php?t=6164 Otherwise as Bounce stated, could be as simple as the gear positioning sensor (although being a 2nd to 3rd gear thing only, it seems unlikely, as that would mean 4th to 5th would be doing the same thing). The sensor itself houses two sensors within, one does the selection angle and the other shift travel - seems weired it is only doing it on 2nd to 3rd if it is sensor related. Last edited by NZ_M3; 05-04-2012 at 05:45 AM.