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ECU - OBDII DTCs and PIDs

VF GMLAN Stuff

Discuss Diagnostic Trouble Codes and Parameter IDs for the Holden VE Commodore, VEII Series Commodores, and HSV E1, E2, and E3 models

Postby vsboost » Sun Sep 04, 2016 9:51 pm

Hi All
Couldnt find a specific VF place to post this.
Decided to play around with some GMLAN stuff on a VF Calais-V
Using Raspberry pi 3 with a cheap ebay MCP2515 modified module connected to pin 1 & 5 on obd2 connector.

Will post what else i find, would love if people post up their findings.


1020c040#0500002201 -- makes both indicator lamps on the dash light up
1020c040#0500000001 -- turns off both indicator lamps on dash


or use the below script in linux

## Canbus send ##
while [ : ]
do
# int Hazard lights on #
cansend can0 1020c040#0500002201
sleep 0.5
# int Hazard lights off #
cansend can0 1020c040#0500000001
sleep 0.5
done
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Postby TazzI » Mon Sep 05, 2016 9:35 am

Good to see someones playing around on the gmlan bus!

Theres soooooooooooooooo many messages and commands going on at any one time, it can be quite overwhelming.
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Postby vsboost » Mon Sep 05, 2016 9:58 am

Tell me about it, i realised that cansniffer only works with 11bit messages and not 29bit so had to use candump to isolate the message of interest.
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Postby TazzI » Tue Sep 06, 2016 12:41 am

vsboost wrote:Tell me about it, i realised that cansniffer only works with 11bit messages and not 29bit so had to use candump to isolate the message of interest.

Sounds like some custom coding is in order ;)
I find manually searching through frames takes forever.. dont make the mistake like I did and try copy/paste large dumps into word... I found out the hard way that 1000+pages results in crashing the laptop :lol:

Need to put in some more coding to ignore repeated frames and only display new frames.
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Postby vsboost » Tue Sep 06, 2016 2:15 pm

For sure, I recently found a program somebody made called canqv that does what cansniffer does but also works with 29bit messages, also have done some work in excel to remove baseline messages and only display new ones.

Found some more for those that are interested.

10438040#01 vol up
10438040#02 vol down
10438040#03 up/next
10438040#04 down/previous
10438040#05 source
10438040#06 talk
10438040#07 mute
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Postby TazzI » Wed Sep 07, 2016 11:18 am

vsboost wrote:For sure, I recently found a program somebody made called canqv that does what cansniffer does but also works with 29bit messages, also have done some work in excel to remove baseline messages and only display new ones.

Found some more for those that are interested.

10438040#01 vol up
10438040#02 vol down
10438040#03 up/next
10438040#04 down/previous
10438040#05 source
10438040#06 talk
10438040#07 mute


Good ol' excel!

Have you tried sending those to the car, do they actually control changing those parameters.. or are they just "broadcast" indicting the new change?
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Postby vsboost » Wed Sep 07, 2016 11:44 am

Yea i tested them yesterday and they do control the function just as if the actual button was pressed.

Kind of cool controlling the volume from a computer. :lol:

Now to get cracking on a program to do other functions when certain sequence of buttons are pressed.
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Postby TazzI » Wed Sep 07, 2016 8:48 pm

vsboost wrote:Yea i tested them yesterday and they do control the function just as if the actual button was pressed.

Kind of cool controlling the volume from a computer. :lol:

Now to get cracking on a program to do other functions when certain sequence of buttons are pressed.


Ah sweet! Didnt realize that!

Hmm.. tried sending some custom stuff yet?

Like..
10438040#08
10438040#09
10438040#FF
ect

Might do something of interest.. flick to a hidden screen or setting?
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Postby vsboost » Thu Sep 08, 2016 8:50 am

TazzI wrote:
vsboost wrote:Yea i tested them yesterday and they do control the function just as if the actual button was pressed.

Kind of cool controlling the volume from a computer. :lol:

Now to get cracking on a program to do other functions when certain sequence of buttons are pressed.


Ah sweet! Didnt realize that!

Hmm.. tried sending some custom stuff yet?

Like..
10438040#08
10438040#09
10438040#FF
ect

Might do something of interest.. flick to a hidden screen or setting?


Tried those, didn't notice any difference unfortunately. :(
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Postby Brianbri6 » Fri Jan 20, 2017 4:55 pm

the commands control the radio from the steering wheel or you can use it as receive commands to control something from the steering wheel here is my video i made a while ago with an android app that controls the music track.

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