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Author Topic: ME7.5 output via CAN  (Read 2680 times)
geos3
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« on: July 12, 2020, 01:25:30 PM »

Hello,
can you tell me or give me a hint, how to find adresses where ECU sends or can send data via CAN - Mini CAN protocol. In Audi S3 I know it sends calculated torque, but i would like to send some important values like EGT, req lamdba, actual lambda, retarding angle etc.
Thanks in advance
EDIT: I did some search and it looks like ECU needs to be reprogrammed. Not flash. If so, then it is mission impossible. I will attach adresses that I am told needed to be changed/added
« Last Edit: July 12, 2020, 01:47:00 PM by geos3 » Logged
geos3
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« Reply #1 on: July 12, 2020, 01:49:38 PM »

Mini CAN protocol            priority: not used               
ECU output:             HIGH / 00-64 /               
0xF84700 - ID488 byte 6 - ID            MEDIUM / 65-A0 /               
0xF84800 - ID488 byte 7 - DATA            LOW / A1 - FF               
                           
   byte 6   byte 7   byte 8    data desc.   me7   hex to phys   units / sample   min,max   desc
   ID   data   NOT USED                   
                           
0   00   AA      checking friendly ecu   if byte6 = 00 and byte7 = AA            
1   01      ok   boost pressure actual   pvdkds-pu / calc in ecu   x*10 (mbar)   1.23 bar   0,2.55   now only relative boost!
2   02         boost pressure desired   plsol-pu / calc in ecu   x*10 (mbar)   1.23 bar   0,2.55   do not subtract atmospheric pressure!
3   03      ok   wastegate duty cycle   ldtvm   x*0.39062   40 %   0,100   
4   04      ok   overall retarding angle   wkrm   (x-128)*0.75   6 KW   0,18   80h = 128 = 0
5   05      ok   ignition angle   zwist   (x-128)*0.75   18 KW   -90,90   80h = 128 = 0
6   06      ok   EGT sensor   tats_w   (x*5)-50   500 c   -50,1225   
7   07      ok   lambda regulation   fr_w   (x-128)/3.2   12%   -30,30   
8   08      ok   AFR desired   lamsbg_w    x*0.2299   14.5 AFR   0,25.5   
9   09      ok   AFR current   lamsoni_w   x*0.2299   12.8 AFR   0,25.5   
10   0A      ok   injector duty cycle   ti_b1   ((x*0.3328)*RPM)/1200    40%   0,120   
11   0B      ok   mass airflow   mshfm_w   x*1.784   230 g/s   0,455   
12   0C         selected gear   gangi   x   4   0,8   
13   0D      ok   EGT model   tabgm   (x*5)-50   500 c   -50,1225   
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