Porshe 968 MY92 siemens 5WK4062

[tkacki]

Hello,

Please help to clear crash data.

Car ident: Porsche 968 year 1992 dual airbag.
Airbag ECU ident: Siemens 5WK4062, OEM no 944 618 217 02
EEPROM ident: OKI M811P / 93c46

Thanks in advance.

[auto80]

Try & report

[tkacki]

Thanks. Unfortunately it doesn't work.
Result: Airbag light flashes. Unable to connect to airbag unit using factory diagnosis tool.
After reprogramming to original content, the unit starts and behaves as previously (crash record).

[tkacki]

Original dump:

FF FF FF FF FF FF FF FF 80 FF FF FF 34 BC B3 80
64 9B 23 74 16 4C 1D 50 1F 30 30 0C 04 4E FF FF
FF FF FF FF FF C1 C1 B0 B0 B5 B0 37 38 34 38 FF
FF FF FF AA FF FF 14 01 00 9E 00 62 03 92 FF 0C
FF FF FF FF FF FF FF FF 7F FF FF FF CB 43 4C 7F
9B 64 DC 8B E9 B3 E2 AF E0 CF CF F3 FB B1 FF FF
FF FF FF FF FF 3E 3E 4F 4F 4A 4F C8 C7 CB C7 FF
FF FF FF 55 FF FF 03 00 00 9E F0 40 03 13 FF 0C

The memory seems to be hashed. Compared to other 5WK40xx (i.e. BMW e36 5WK4060) the addres bit 0 and 5 are chenged.
The dump after decoding should be like:

FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
80 7F FF FF FF FF FF FF 34 CB BC 43 B3 4C 80 7F
64 9B 9B 64 23 DC 74 8B 16 E9 4C B3 1D E2 50 AF
1F E0 30 CF 30 CF 0C F3 04 FB 4E B1 FF FF FF FF
FF FF FF FF FF FF FF FF FF FF C1 3E C1 3E B0 4F
B0 4F B5 4A B0 4F 37 C8 38 C7 34 CB 38 C7 FF FF
FF FF FF FF FF FF AA 55 FF FF FF FF 14 03 01 00
00 00 9E 9E 00 F0 62 40 03 03 92 13 FF FF 0C 0C

The crash record is highlighted in RED.
However, still not sure how to clear it. Putting 00s or FFs causes removal of crash record (ecu responds) but there is an error "Control unit faulty" (probably bad eeprom checksum or invalid fill bytes in crash record).

HELP !!!!

[tkacki]

Reorganized original file with crash data

[tkacki]

Solved. Clean data below.

FF FF FF FF FF FF FF FF FF FF FF FF FF FF 00 00
80 7F FF FF FF FF FF FF FF FF FF FF FF FF FF FF
64 9B 9B 64 23 DC 74 8B 16 E9 4C B3 1D E2 50 AF
1F E0 30 CF 30 CF 0C F3 04 FB 4E B1 FF FF FF FF
FF FF FF FF FF FF FF FF FF FF C1 3E C1 3E B0 4F
B0 4F B5 4A B0 4F 37 C8 38 C7 34 CB 38 C7 FF FF
FF FF FF FF FF FF AA 55 FF FF FF FF 14 03 01 00
00 00 9E 9E 00 F0 62 40 03 03 92 13 FF FF 0C 0C