2002 Toyota Yaris crash data reset -- 89170-0D040 -- TRW 205881-102

[strock77]

Hi!

My 2002 Toyota Yaris started flashing its airbag light without any accidents. I took it to my mechanic, he read from the OBD port and said that there is crash data in the airbag electronics.
So now I'm trying to repair it.

TOYOTA 89170-0D040
TRW 205881-102

There are 2 chips with 8 pins on the board, one says

ATMEL212
25040NA
.1C0379B

and the other

2903
PMBD

which one may be the eeprom? I will try to hook it up to a Raspberry Pi running Debian and try to read it. Do I need to desolder it? Or can I dump the data without it?

Thanks for your help!

[strock77]

Small update, I think I found the chip. The eeprom should be the Atmel, here is the datasheet:

https://ww1.microchip.com/downloads/en/devicedoc/doc0606.pdf

I will try to read the chip by connecting a clip to the board, and the other end to a Raspberry Pi.

[fuzz1]

Hi
Better desolder to read. However there are so many files for this module on here that u can get another dump to clear and write to your ECU

[strock77]

Alright, I was able to read the chip without desoldering by using a clip. I did not have any eeprom readers so I used an esp32 and this lib if anyone is in the same situation.
https://github.com/nopnop2002/esp-idf-spi-eeprom

I only have one question, I have looked at other bad and cleared files, and mine is just a little bit different. Near the end of the file people have FE or FD both in their cleared and their bad files, but I just have plain FF. See the attached files, ORIGINAL_BAD is the dump from my ecu, and other files are from the forum. GOOD is the cleared ones. In the third line from the back on the third character they all have FE or FD, should I just keep mine FF?

[fuzz1]

Just write the known good working file to your eeprom. If this does not work your ecu has probably gone bad