Looking for Info on OBD2 GM 60*V6's

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Looking for Info on OBD2 GM 60*V6's

Postby planethax » Wed Jan 20, 2010 3:07 am

I looked through the freebasic code that sabercatpuck posted for his Saturn.

I have been trying to convert for GM 60*V6 Obd2

There are def differences, I just need info on where to find some stuff.

Example, when I send
27 02 (plus the key I want to try . example FF FE ) the return is
7F 27 02 FF FE 22
Not sure what the 7F is?
I am guessing the 22 means wrong key tried, what would a successful key be?

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Re: Looking for Info on OBD2 GM 60*V6's

Postby planethax » Wed Jan 20, 2010 3:34 am

To be honest, I was expecting to see
67 02 37 (wrong key) or 67 02 34 if it was correct.

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Re: Looking for Info on OBD2 GM 60*V6's

Postby sabercatpuck » Wed Jan 20, 2010 5:53 am

the 7f means that there is something definitly not correct going on. That is an error response code like you are sending the command in the wrong mode. You did start the thing off with a "at sh 6c 10 f1"? If you are using an elm or elm compatable try typing in "at h1" so you can see the whole headder. the responses should be 33 which is like a breach of ediquete, for instance you tried to put in a key without asking for a seed, or past the timeout number (for instance you cant type these in fast enough to get it in before the timeout). 34 is the response for a correct key, 35 I get on the first wrong attempt, 36 on the second, you now need to wait 10 seconds, 37 is for too many tries within 10 seconds.

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Re: Looking for Info on OBD2 GM 60*V6's

Postby planethax » Wed Jan 20, 2010 9:56 am

Yes, I have learn 7F means
I Screwed UP!!


Lol,

I was only sending the Key the initial try, maybe I need to send each time?

Like
27 01 < request seed
27 02 XX XX Key attempt
27 01
27 02 XX X2

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Re: Looking for Info on OBD2 GM 60*V6's

Postby sabercatpuck » Wed Jan 20, 2010 12:40 pm

Yep, you are correct. You need to send the request each time, and then there is the timeout if you take too long after the seed request to send the key

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Re: Looking for Info on OBD2 GM 60*V6's

Postby planethax » Thu Jan 21, 2010 10:55 am

this wierd, to check what was going on I went and connected via elm327 via hyperterminal to the Pcm

Connect fine to Elm get responses, get fine to Pcm can check for Dtc and coolant temp etc but when I request seed or even try to send key I get
"NO DATA"

What else must I be missing?

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Re: Looking for Info on OBD2 GM 60*V6's

Postby sabercatpuck » Thu Jan 21, 2010 11:23 am

did you make sure to change to physical addressing mode by issuing "at sh 6c 10 f1"?. That changes the the headder you are sending, then when you go to send the get key command you send just the "27 01"

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Re: Looking for Info on OBD2 GM 60*V6's

Postby planethax » Thu Jan 21, 2010 12:01 pm

Well a bit closer,
wasn't getting the set right the physical addressing mode correctly by issuing "at sh 6c 10 f1", was setting on form load which didnt take for some reason.

but sometimes when requesting seed instead of getting my seed, I am getting
67 01 37

Must have to do with my timing, may have to rework everything but atleast I am closer.

Here is copy of a short test

Com Port 4 Closed and Ready......
Opening Com 4 Port
Com Port 4 Open
AT Z


ELM327 v1.1

>at sh 6c 10 f1
OK

>27 01
67 01 05 BC

>27 02FF FE
67 02 35

>Incorrect Key Tried FFFE
Trying Key FFFD
27 01
67 01 05 BC

>27 02FFFD
67 02 36

>Incorrect Key Tried FFFD
Trying Key FFFC
27 01
67 01 37

>27 02FFFC
67 02 37

>Incorrect Key Tried FFFC
Trying Key FFFB
27 01
67 01 37

>27 02FFFB
67 02 37

>Incorrect Key Tried FFFB
Trying Key FFFA
27 01
67 01 37

>27 02FFFA
67 02 37

Incorrect Key Tried FFFA
Trying Key FFF9
>27 01
67 01 05 BC

>27 02FFF9
67 02 35

>Incorrect Key Tried FFF9
Trying Key FFF8
27 01
67 01 05 BC

>27 02FFF8
67 02 36

>Incorrect Key Tried FFF8
Trying Key FFF7
27 01
67 01 37

>27 02FFF7
67 02 37

>Incorrect Key Tried FFF7
Trying Key FFF6
27 01
67 01 37

>27 02FFF6
67 02 37
Incorrect Key Tried FFF6
Trying Key FFF5

>27 01
67 01 37

>27 02FFF5
67 02 37

>Incorrect Key Tried FFF5
Trying Key FFF4
27 01
67 01 05 BC

>27 02FFF4
67 02 35

>Incorrect Key Tried FFF4
Trying Key FFF3
27 01
67 01 05 BC

>27 0Incorrect Key Tried FFF3
Trying Key FFF2
27 01
67 01 37

>27 02FFF2
67 02 37
Incorrect Key Tried FFF2
Trying Key FFF1
Restart with Key FFF1



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Re: Looking for Info on OBD2 GM 60*V6's

Postby planethax » Thu Jan 21, 2010 12:09 pm

Def timing issue, was getting locked out,

shouldn't be to hard to fix.

well I know my Seed is
67 01 05 BC

Now to wait 4 or 5 days with this running to see if it works.

(wish I knew key already to test lol)

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Re: Looking for Info on OBD2 GM 60*V6's

Postby VL400 » Thu Jan 21, 2010 1:06 pm

Try a key of D748, I am not confident of it being correct but it may work

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