Siemens ECUs - the reflash/modding possibilities

[DucNaked]

+1 on everything ungeheuer said

I believe that ung and I are the first to try the Rexxer on the m1100 and there are still some bugs to work out. Our bikes aren't excepting the tuned map, but we are able to reload the stock map on the unit and flash our ECU back to stock.

 Christian seems like a first rate guy, and replied very quickly to my problem. I believe in the end I will be satisfied with this product. Hopefully some good news to report next week.

[Raux]

I'll try to make it up to Intermot and talk to the guy.

[ungeheuer]

I'll try to make it up to Intermot and talk to the guy.

That would be great  .  But since Intermot is still almost a month away, I'm somewhat hopeful that we'll have all this sorted prior to that.  Gotta love this network we have here  .

[Link]

Link, both DucNaked and myself have the Rexxer User unit.  At this stage.... there are problems.  We're already in contact with Christian who - as you say - is extremely helpfull and I have no doubt that he'll do whatever it takes to resolve the current issues.  BUT...  at this stage I would hold off buying the Rexxer until we have a resolution.  Feel free to mention  "ungeheuer in Australia" to Christian.... He's well aware of the issues we're experiencing and that we're awaiting ... satisfactory outcomes.....

On the surface it does seem like the Rexxer unit offers most features for the $$, yup.  Over and above just reflashing your ECU, Rexxer promises the following:
1) Automatic Stock ECU back-up.
2) Error code diagnostic/resetting function.
3) Service light reset function.
Whereas ProTune we know is just a reflash tool, with none of the additional functionality listed above.

But thus far we have learned that the Rexxer Unit will NOT - despite their earlier assertions - back up the ECU's original mapping before uploading the tuning map reflash. 

Exactly as was reported of the ProTune unit on TOB. 

Christian resolved this issue by sending me a copy of the stock ECU map to keep as backup - so in theory you could swap back and forth between your "tuning map" and the stock map as often as you like.  But.... as I said above, currently there are issues preventing this from working as it should.

Christian and Rexxer are preparing to exhibit at the Intermot show in Cologne early next month and so I'm sure they'll be keen to have all the current issues resolved prior to then.

You might like to let him know that you're eagerly awaiting the outcome before you buy  .  A little pre-sales pressure goes a long way  .

DN and myself will keep y'all posted.

Thanks for clearing that up, I will send an email to Christain and drop your name not to put him on the spot but just to let em know I'll be waiting for "bugs" to be worked out prior to buying one. It must be frustrating if the the ECU isn't excepting the tuned map that's the main and only reason to have one of those units. I picked up a stock ECU on ebay for real cheap and I'll keep the original ecu stock and have the ebay ecu to play with so it really wouldn't matter to me if the Rexxer stored the stock map or not. It seems strange that they would release them with such major flaws. Oh well at least there trying. And big props to you & DucNaked for all your work time & money you've been putting into this and sharing it. 

[DucNaked]

Gentlemen we have lift off  

[Veloce-Fino]

OHH SHIT. liftoff indeed. UPDATES don't tease! Was it successful? rpm limit increased?? bike runs properly??
 

[DucNaked]

OHH SHIT. liftoff indeed. UPDATES don't tease! Was it successful? rpm limit increased?? bike runs properly??
 

yes,yes,and yes

still have to talk to ung. about a few things. 

[causeofkaos]

yes,yes,and yes

still have to talk to ung. about a few things.  

lift off nothing i got a funny in my pants.

talk about what?? you guys are going back and forth in german!! we all need to be in on the conversation!!

[mattc7]

interesting

it's, ALIVE!

[DucNaked]

This is what I'll say for now.
The flash process was under five minutes. The map that I'm currently running removes the 02 sensor and the flapper valve. I have to say the map is pretty good. Removing the closed loop portion of the map and fattening it up has completely changed the bike in the lower rpm range. No more lurching or jerking down low. I now have nice smooth acceleration through the whole rpm range (which has also been raise).
 More to come. I'm waiting on a couple of answers to questions I have before I give a full review.

[ungeheuer]

Good news DN 

But shit.  I'm stuck here at work....  I wanna go home and play ECU flashing... 

Is it time yet?





What about now?

[causeofkaos]

How bout now???

[ungeheuer]

Yup, now's good  

Closed loop? What closed loop?  .  Christian at Rexxer sorted out the initial problem very quickly - I'm very impressed with his willingness to jump right in and get things sorted...... oh, and with his ability to withstand the gazillion emails going back and forth between me, him and DN.  

So this Rexxer thing?  Once we got the bug out of the system..... (I'm sure Christian has it sorted now for all future Siemens application Rexxers too  ).....  it really is plug-n-play.... it reflashed my ECU in just a few minutes.....  it allowed me to read and reset error codes....  seems it all works very well  .

My reflashed ECU now runs modified DP mapping - its a clone of the DP "racing EVO" ECU which is supplied with the Termi Full System exhaust, but with the o2s deleted and rev limit bumped to 9500rpm.  Oh and most importantly of all.... it now scrolls....  

"UNGEHEUER 1100"  
....on the display at start-up   .



See you in the PCV/Autotune thread for Part 2  

[DucNaked]

So can we agree to give this product two thumbs up?    

[mattc7]

SWEEEEET

(says me)

NOOOOOOOOOOOOOO!

(says my credit card