I was not aware that I was required to pick a side?

 

Please can you chill for a bit... this thread was not posted for going back and fourth who side is who or whatever. Posted a nice informative thread, and still the same stuff over and over. So please all of you just chill out. Thanks, I would really appreciate that very much.

 

I will write another article on how the ECU store and use Adaptations, and maybe show some sample coding routines that I found from diassembly that covers that function. But I will post that on our forum because some people have to start pissing matches all the time here on NAM.

 

Jason/Mike,

Can you confirm or deny the claims in this thread by 002 that the speedo reset really doesn't do anything for the ECU?

 

This is what I notice in the past... 2002-2005 models when I did a cluster reset it did nothing for the DME. On a 2006 MCS a cluster reset did affect the DME adaptations. First, I put our remote tune software (beta) and read the current adaptations. Then I did a cluster reset, and you can hear the throttle body open and closed just like when you turn the car off. Then when I was finished, I connected our software and hardware and read the adaptations again, and they were are set to zero. That's my experience so far, but I will do some investigation and research why the other years don't. I will try to look at the instrument cluster code...lol... Yes, I got into the instrument cluster and read out the flash and started disassembling that too... Just haven't spent much time with that.

 

Bone Stock

 

Can you provide a little more info about your car?
- How long have you had the car before this code start showing up?
- Was there any immediate work done to the car prior to this code showing up?
- Noticed anything out of the oridinary about your car (excessive black residue at the tailpipe or other abnormal signs) when this code came on?
- What 'fixes' did the dealership try in previous attempts? did they check the O2 wires? replace the sensors? check the running values?

When the dealer replaced my faulty stock CAT, they ran an extensive test prior to replacing the CAT... and afterwards, they ran some more tests to make sure the running values were within range before giving the car back to me.

More info please... And yes, these ECU's are running science labs and they contain a lot of codes and parameters...

 

-I had the car for maybe a year. At that point it was about two years old and had a little over 22k on it.

-No engine related work (in the sense of combustion). Oil pan gasket and T-stat housing is all really.

-One of the first clues that things where a little off was that there is a good amount of carbon on my tail pipes. AFAIK these cars run rich to begin with (duh I supposed, forced induction) and the amount on the back didnt seem excessive. Although the engine guy I was working with on my FSAE team thinks otherwise.

-My favorite part.
1. Update ECU software
2. Reset ECU (all adaptations, everything they said)(what a BS fix, it took them a week to come up with this one after talking with the "engineer's" back at HQ)
3. Replace cracked intake tube (running between throttle body and SC)

They haven't told me anything about the sensors, anything about how the car is running, or anything about the 02 wires. It would seem obvious to check that stuff first, and maybe they did, but they certainly haven't implied they have. The first time I brought it in the SA I handed the car off said it was probably the 02 sensor, so I would Imagine they were checked.

As a side question. Does the ECU use the pre-cat or post-cat sensor to monitor AFR's and trim fuel? I would imagine just the pre cat but I wouldnt put it past BMW to use both.

 

Based on our analysis of the code, the MINI uses both pre-cat or post-cat sensors to monitor & compensate for trim levels...

The next time u bring the car in for service, i would suggest that you insist that they take a closer look at the O2 sensors and wires

Hope this helps... cheers. mike

 

Very interesting. I would have thought they would use just the pre-cat sensor due to the simple fact that it monitors things before they have been scrubbed by the cat. That is to say, you dont have to figure out how efficient your cat is before you can analyze the AFR.

02 sensor is where my money is at too, the wires are also a good call.

 

yeah, everything points to the O2 and wiring. Pls report back after your next dealership visit Cheers.

 

Thanks Jason!

 

Jason,

First just like to say top work! Its good to see someone going to the time to work out how the ecu is really working and the code its processing.

I have one interesting question for you though! Have you looked at the closed loop idle hunting problems on facelifted July 04 onwards ECUs?? Seems to only be during closed loop fuelling from what I can test but do you think this is related to the intrusive O2 Sensor testing??

 

Do you have your ECU software ID#? I can look into the code since there are some code differences from the USA to UK models. I have some UK 512k ROMS just need to know which version # in your ECU uses. I have found the closed loop functions and also limp home mode functions, just haven't gotten in depth on the limp mode functions just yet.

 

Great work as usual Jason! Keep it comin' & I'm psyched for you to lay some of this genius on the FPD's ECU.

 

Would need help finding the ID but might check the ident info on INPA tonight and see if its in there. Never know Hubie might have passed mine on sometime and it might be in your collect

 

You might be correct on that one.

 

Jason,

Thanks again!
I finally was able to get the ECU reset last night, along with the P0136, P0139, and P0420 codes, and drove it around the block a few times.

The proof is in the pudding. I asked the wife how the Mini felt today, and she reponded "SMOOOOOOOOOOOOOOOOOOTH".
It pretty much felt like it did after our last tune... and the rough idle that has developed recently appears to be gone.

Big thumbs up for the information!!!
Dare I ask about O2 simulators in this thread, and your take on them?

 

Wow, Jason...I'm impressed!

Excellent work