Help on ELM327 - KWP2000 - Page 2

Vitaliy · 06-10-2009, 08:34 PM

Quote: Originally Posted by fanl

Updating Solution:

To solve this problem is very simple:
Just issue this comand to ELM327: AT SH 8010F1
SH = Set Header, it will use the proper header for the non OBD KWP2000 of Alfa romeos.
Tested and it is initializing comunication.

Thanks to p2psmurf.

Are you able to get any useful data from the vehicle?

fanl · 06-11-2009, 12:06 AM

I got a string of bytes that were not the tipical awnser like it is suppose to be.
I expected something starting with 41 01.. but i got F7 or 70 as fst byte.. I must try again to get the precise information. As soon I get it tested again I'll post.

Vitaliy · 06-11-2009, 10:46 AM

Quote: Originally Posted by fanl

I got a string of bytes that were not the tipical awnser like it is suppose to be.
I expected something starting with 41 01.. but i got F7 or 70 as fst byte.. I must try again to get the precise information. As soon I get it tested again I'll post.

My guess is that the first byte was actually 7F (negative response)?

Vitaliy

fanl · 06-15-2009, 10:53 PM

hello ppl! Follow the communication I had with the car.. help me understanding it.

Code:


ELM327 v1.3a

>at sh 8010f1
OK

>at tp 5
OK

>0001
BUS INIT: OK
7F 00 11 

>01
NO DATA

>0002
NO DATA

>0101
NO DATA

>at cp
?

>at pc
OK

>at sp 5
OK

>0001
BUS INIT: OK
7F 00 11

fanl · 06-15-2009, 11:06 PM

another string that "worked"

Code:

>8101
BUS INIT: OK
C1 EF 8F

another...

Code:

>1800ff00
58 03 11 72 62 11 73 21 D6 00 A8

fanl · 10-13-2009, 10:59 PM

Ive had access to Fiat documentation, and something come up to my mind:
TO start a communication 81h must be issued, and the awnser is what is shown in my last post.
Then to startDiagnosticSession 10h must be issued followd by the type of session and the baud rate.
Baudrate?! What's going on here? The baudrate of the K line will be changed or other line must be used in the DiagnosticSession ?
Can anyone help me?

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