Siemens ECUs - the reflash/modding possibilities

[DucNaked]

Just a note about the ProTune.
I didn't have the issue with the display reading the wrong units. My bike went straight to USA.  Of course, I bought my ProTune directly from the company in Italy.

The dyno results are on a post at the DML, If anyone wants me to, I can also post them here.  Let me know.

I put a link to your post on the DML on the first page of this thread 

[Link]

I got the Rexxer Unit and installed the new map on the 696 & the results of the reflash are great ! The map is set up for Hi flow filter, slip ons & 02 sensors still installed with a rev limit at 9500 RPM. The bike is a lot smoother at low RPM's you can lug it down to almost 2K and it's still smooth and at 3500-4000 crusing in 3rd is really nice just roll on the throttle and she scoots, there is no noticeable dip in the power band from 3K to 5K (I want to get it on a dyno just to compare maps from the DP ECU to Rexxer) from 5K to 9K the bike pulls much harder then before so I'm thinking there's a torque increase starting at around 5K cracking the throttle from 7K to redline is a LOT more fun then it was and will make passing cars much better. Having the redline at 9.5K makes a big difference (my dash was reads about 9.8K when the rev limiter kicks in) Over all the Rexxer reflash transformed that 696 motor into a nice little power plant, it actually will now power wheelie with very little effort. IMO if you like your 696 your gonna really like it after your reflash. The unit was sold with 2 maps, 1 map installed on unit for instant plug & play the other map was emailed to me but as of now I can't acsess the 2nd map which is set up for complete open loop with no 02 sensors I'm waiting for some help from Christian on this. The only problem I have with the reflash is the dash is now in EU mode. I checked the manual but could not find any way to change it back to USA. Does any one know how I can get the dash back to USA mode ? I saw a post here or on the DML forum on how to change the dash but after searching I can't find the post. Thanks in advance for any help.
Link

[DucNaked]

I PMed you how to set to us specs, then if you go back a page obsidian gt also exlpains it. Glad your bike is running well. 

[Link]

I PMed you how to set to us specs, then if you go back a page obsidian gt also exlpains it. Glad your bike is running well. 

With your info. I'm back to USA spec. & all is well.
Thank-you

[dennisd]

Damit, I thought after the Ohlins shock and OZ wheels swap out, my major spending was done.  Now you guys are making my wallet start to bother my ass.  Guess I'll have to make it a little thinner again.

[ggemelos]

The Rexxer unit definitely sounds interesting.  I have a set of the new BoomTubes (series 2) on my M1100, but I have not touched the air box.  I would love to get rid of the low end jerkiness and increase the RPM limit.  Would a Rexxer map accomplish this, something like the slipon map, or would I first need to open up the air box?  I am not looking for more power, just smoothness throughout the RPM range.     

Also, on their website under updates, they claim to have the backup feature working.  Can anyone verify this? 

[ungeheuer]

I have an unresolved issue with my Rexxer reflash.  

My Rexxer reflash deleted the stock closed loop and therefor (in theory) the need for the stock o2 sensors..... but....

Since physically disconnecting and removing my stock o2 sensors I now get the "check engine" light illuminating when I roll off the throttle from above 6000rpm back down into the supposedly deleted closed loop area at 4250>>4000rpm.  Light stays on for around 4 seconds and then goes away.... until the next time I roll right off the gas.  Interestingly this only happens when actually riding, when in gear and on the move.  If I pull the clutch, rev the motor... or in neutral... no light.  I used the Rexxer to retrieve the DTC error codes (so I can confirm that feature functions well).  Both codes - P0133 and P0153 - are defined as "o2 sensor circuit slow response".  And yet the ECU is meant to be flashed to pay no regard to any o2 inputs.....   .

I emailed Christian @ Rexxer on Monday morning..... and am still waiting to hear if theres a fix  .

[Link]

I have an unresolved issue with my Rexxer reflash. 

My Rexxer reflash deleted the stock closed loop and therefor (in theory) the need for the stock o2 sensors..... but....

Whilst the bike continues to run well, since physically disconnecting and removing my stock o2 sensors I now get the "check engine" light illuminating when I roll off the throttle from above 6000rpm back down into the supposedly deleted closed loop area at 4250>>4000rpm.  Light stays on for around 4 seconds and then goes away.... until the next time I roll right off the gas.  Interestingly this only happens when actually riding, when in gear and on the move.  If I pull the clutch, rev the motor... or in neutral... no light.  I used the Rexxer to retrieve the DTC error codes (so I can confirm that feature functions well).  Both codes - P0133 and P0153 - are defined as "o2 sensor circuit slow response".  And yet the ECU is meant to be flashed to pay no regard to any o2 inputs.....  .

I emailed Christian @ Rexxer on Monday morning..... and am still waiting to hear if theres a fix  .

I was thinking that probably only happens while riding is due to the increase in air pressure but WTF do I know. It may be possible that the reflash has just adjusted the parameters of that circuit instead of deleting it. I know on the Suzuki ECU's that can be tuned with a Teka box that's what happens you just adjust the parameters until you get the desired result never really removing the o2 code but for all intense & purpose it's like deleting it. It still seems odd that you have a code that says slow response on something that is removed from the bike ?? One would think the code would say "no o2 circurt" DuckNaked is also running no 02 sensor map I wonder if he's getting the same code but I don't think he's done the wasp mod or running the PCV and what that would change is beyond me. FYI Christian was out of town all last week His last email to me was He won't be answering any emails until next week. I also have the no o2 sensor map but I can't get it to load from my email to the User Unit so Christian has more than one email waiting for Him. I know He'll get my problem sorted out. Good luck with this & keep us posted.

[hcomp]

OH BOY! OH BOY! OH BOY! - I want this!

[ungeheuer]

....DuckNaked is also running no 02 sensor map I wonder if he's getting the same code......

Yeah but when I last checked with DN, he still has the o2 sensors in place and connected (no "check engine" light on mine when I ran like that either).   It seems to me that when the revs drop back down into the former closed loop area.... the ECU is still waiting to hear.... something...  from the o2 sensors.  And I need the ECU to want nothing from the stock o2s.

[DucNaked]

Yeah but when I last checked with DN, he still has the o2 sensors in place and connected (no "check engine" light on mine when I ran like that either).   It seems to me that when the revs drop back down into the former closed loop area.... the ECU is still waiting to hear.... something...  from the o2 sensors.  And I need the ECU to want nothing from the stock o2s.

Jesus you're a pain in the ass 
So, on my nice relaxing Sunday I went out and braved the rain, wind, and cold. I unhooked those make the beast with two backsing sensors and went for a test drive!!!!!   

















And the verdict is  Same errors!!
As you said they quickly go away and only occur when you snap the throttle closed. I don't know what to make of it. Hopefuly Christian can shed some light on the subject.

[Raux]

sounds like there's a condition that the computer reads that is seperate of the map.

[DucNaked]

sounds like there's a condition that the computer reads that is seperate of the map.

That's what I'm thinking.

[DoWorkSon]

So which is better....

Rexxer or Protune?

Or the same.... ?

[Veloce-Fino]

So which is better....

Rexxer or Protune?

Or the same.... ?

Haven't seen you around for a few weeks, vacation?

Both units appear to do the same job, but rexxer is less expensive and offers great customer support from what I have read. Maybe the others can ship in with 1st hand experience.