Shadow Password E84, E98, E39, E39A

[antus]

What is the shadow password used for? It sounds like a bootloader recovery unlock so that if the PCM is bricked then it is still locked but recovery can be unlocked with the shadow password. Is this correct?

[kostia111]

this is the password to enter recovery mode
each instance of the block has its own password
I can recover this password from the label
https://www.youtube.com/watch?v=w_pUh09WVD0

if the block died during programming and does not respond to commands
or if, for example, the tuner protected the block from reading
knowing the password you will be able to read and write the correct firmware
etc

[3staar]

We have come across a few instances of needing the password, usually quicker to program a donor ecu to car. Would love to revive the few dead ecus we have.

[3staar]

A big thank you to kostia111, he provided the correct password for us to recover our bricked ECU saving buying and programming another. FYI there is no other way of calculating the password other than from the label itself. EEPROM/Flash etc are all useless.

[kostia111]

I don't know how to edit the topic title
and the first message.
It is now also possible to calculate the password using the label for E84 modules.

[antus]

You edit the first post of the thread, and change the title there. I've done it for you.

[Arcadius82]

Hello. Is it possible to decoding shadow password from this E98. Data has been corrupted

E98
55509243
1310101000000X
395357783
1118233886714970
SERV 55501366

Regards
Arek

[maxjope]

hello I need the shadow password for a delco 39.
12648906
12643248

86aa69c121252905

[kostia111]

Hello. Is it possible to decoding shadow password from this E98. Data has been corrupted

E98
55509243
1310101000000X
395357783
1118233886714970
SERV 55501366

Regards
Arek

Hello
can be counted

I rarely go to the forum
It’s easier to find me on telegram @kostia111