Crash Clear TRW airbag fiat with CH341a without desoldering

[pjakub]

Hello everyone, in this post I want to show you how I made a crash clear to a Fiat Palio TRW airbag control unit using a CH341a programmer.


CLARIFICATION 1: Sorry if some sentences are not well understood, my English is not very good and I am using Google Translate.
CLARIFICATION 2: The information in this post is informative. The airbag is a safety device which must be handled with care knowing what to do. I am not responsible for any breakage that may cause the misuse of this information.


Taking as a reference the post made by “dadoCA” where he explains how to use the CH341a to read 95xx memories (https://www.digital-kaos.co.uk/forum...-95xxx-Eeproms) I made the corresponding connections on the pads that connect with the eeprom on the PCB (see attached photo)

conexiones-trw-ch341a (Grande).jpg

SOFTWARE: I use AsProgrammer (https://github.com/nofeletru/UsbAsp-...mmer_1.4.1.zip) which is compatible with CH341a programmer and 95640 eeprom.


To do the reset, the memory rows from CD0 to F40 must be filled with FF.

[fuzz1]

Hi
Silly question how did you find the pin out?

[pjakub]

Sorry for the delay in responding, I haven't been here for a long time.


For the pinout look for the datasheet of the EEPROM memory and from there take the pinout