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Airbag: EEPROM read/write and crash data clearing

This special function reads and writes the EEPROM of an airbag module and clears crash data. You need it when simply clearing the fault codes is not enough because the crash is stored in the device's EEPROM.

Procedure

1. Check that the module is among those covered for EEPROM read/write: all Siemens CAN airbags 2003-2008 such as 4F0959655B (Audi A6/Q7/Allroad 2003-2008), 1K0909605AB, 1K0909605C, 1K0909605AD, etc.; K-Line airbags (Siemens and Bosch) 1C0 909 605 C, 8L0 959 655 A, 1J0 909 609, 6Q0 909 605 C, 6Q0 909 605 A, 6Q0 909 605 B, 3B0 959 655 B, 1C0 909 605 F, 1C0 909 605 H, 1J0 909 607, 1J0 909 603, 4B0 959 655 C, 4B0 959 655 J, 4D0 959 655 C, 8L0 959 655 F, 8A0 959 655 C, 8A0 959 655 K, 4D0 959 655 H, 8D0 959 655 C, 8D0 959 655 L.
2. Open the "Airbag" special function.
3. First try clearing the fault codes with the "Clear DTCs" diagnostic request.
4. If the crash is still stored, use the "Clear crash data" function: automatic clearing is supported on the K-Line airbags (Siemens and Bosch) in the list 1C0 909 605 C, 8L0 959 655 A, 1J0 909 609, 6Q0 909 605 C, 6Q0 909 605 A, 6Q0 909 605 B, 3B0 959 655 B, 1C0 909 605 F, 1C0 909 605 H, 1J0 909 607, 1J0 909 603, 4B0 959 655 C, 4B0 959 655 J, 4D0 959 655 C, 8L0 959 655 F, 8A0 959 655 C, 8A0 959 655 K, 4D0 959 655 H, 8D0 959 655 C, 8D0 959 655 L.
5. If the model does not support automatic clearing, do it by hand: use "Read EEPROM" to read the memory, locate where the crash data is stored, edit the data and write the memory back with "Write EEPROM".

Reference screenshots