BMW Motronic 1.1

[Land Shark]

At 11:52 AM 1/8/97 -0500, you wrote:

>I need a crash course on the Motronic 1.1
>This unit is out of a BMW 325ix 1989 Box # is 0 261 200 173

 Umm.. that's Motronic 1.3, not 1.1

>I have a dump of the eprom, and have found most of the tables i just need to
>know how to identify if they are for fuel, Ign, dwell, lambda and warm-up,
>also i would like to find the rev-limiter, how to read the service codes and
>how to set the service lites back to zero.

 Service codes are best read by the old accellerator pedal trick
 which flashes out 4 digit codes on the Check Engine lamp

 Service lites have NOTHING to do with the Motronic!!

>Is it possible that some maps are only one line.??

 Sure it is..

 But WHY in Gods sake are you messing around with your Motronic
 unit.. EVEN if you find the maps you need, you cannot change
 them, because you will set a checksum fault, there are hidden
 checksums in the EPROM, 1 in M1.x, and THREE in M3.x

 To figure it all out PROPERLY will take you MONTHS

 Trust me.. I did it .. with help from a genius of a robotics
 engineer... WE know of exactly ONE other guy who really knows
 how these things work.. ONE.. 

 Most of the "chip tuners" have NO clue!!

 You need to disassemble the thing..

 You need to extract the ROM code out of the 80C515 processor
 (there's a GIFT, the CPU ID, took us 2 months to find it out!)

 Merge it with the EPROM code.. 

 The run a dissassembler on it..

 THEN you will need a DYNO, an AFR meter, and a lot of skil
 to tune your car in..

 A "crash course" won't do here... these things were NOT designed
 to the tuned outside of the OEM realm.. unlike Motec, EFI, etc etc

 Jim