Reading a partnumber

Reading part number from ECU 0x50

---> ID=000ffffe data=50 88 00 00 00 00 00 00
<--- ID=00000003 data=50 8e 00 00 31 25 49 03
Part Number: 000031254903

CAN_HS ---> ID=000ffffe data=cb 50 b9 f0 00 00 00 00
CAN_HS <--- ID=01000003 data=8f 50 f9 f0 00 08 68 85
CAN_HS <--- ID=01000003 data=09 13 20 20 41 30 65 70
CAN_HS <--- ID=01000003 data=4c 24 20 20 41 00 00 00

First byte in reply is a technical field, like rolling counter, start (0x80)/end(0x40 flag of the multipart message, etc. The P/N is:

08 68 85 13 == 8688513

quick analysis

data = cb 50 b9 f0

• length = 3 (cb-c8)

• module = 50 (CEM)

• type of operation = b9 (read datablock by offset)

ECU Identification

B9F0
  can0  00400003   [8]  8F 50 F9 F0 00 08 69 07
  can0  00400003   [8]  09 19 20 20 20 30 72 89
  can0  00400003   [8]  4C 79 20 41 41 00 00 00

B9F1 - B9F4
  can0  00400003   [8]  CC 50 7F B9 12 00 00 00

Downloadable Software Part Number

B9F5
  can0  00400003   [8]  8F 50 F9 F5 00 30 78 63
  can0  00400003   [8]  09 53 20 41 41 00 00 C0
  can0  00400003   [8]  0A 00 00 30 78 62 13 20
  can0  00400003   [8]  0B 41 41 00 00 40 00 00
  can0  00400003   [8]  0C 30 72 89 81 20 41 41
  can0  00400003   [8]  4C 00 00 70 00 00 00 00

hex2human

CAN Config Part Number: 0030786353204141 (30786353 AA) Flash Sector Start Address: 0000C000

Application Software Part Number: 0030786213204141 (30786213 AA) Flash Sector Start Address: 00004000

Local Config Part Number: 0030728981204141 (30728981 AA) Flash Sector Start Address: 00007000