ads File question (writing ABS stream)

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LittleNo
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ads File question (writing ABS stream)

Post by LittleNo »

i'm just trying to write a ads file for the 90-92 B-Body ABS systems (Bosch)

it's a common ALDL 8192 stream, but the stream length depends on the number of fault codes stored.

15 bytes without any code
20 bytes with one code
25 bytes with two codes
30 bytes with three codes

in the response message of the ABS controller at the beginning of the ALDL session, there is one byte that says how long the stream will be, thats the way the Tech 1 scanner of GM knows what length should be expected ... any ideas how i could implement this, or maybe a variable length of the stream, in the ads File?
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Mangus
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Post by Mangus »

Wow, I didn't know that they did that! With the current incarnation, your only choice is to have a different command for each scenario (byte length). Then try each command until you get a reply.

I'll consider a way to make this better in the version 5.

Very interesting, and good to know.
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LittleNo
Posts: 26
Joined: Fri Jun 24, 2005 9:11 am
Location: Munich, Germany
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Post by LittleNo »

ok, great, if you want to have a look to the stream, its files A134.DS

in case of the B-Bodies, there is no other master module on the ALDL (like described in the stream file)
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