OM648 swap into a w123
OM648 swap into a w123
11-09-2012, 02:51 PM
#16
(10-30-2012, 09:42 AM)raysorenson(09-30-2012, 08:06 PM)whipplem104 I just figured out the actual start message today. I still need to break down the authorization messages.
I know I may be asking too much, but how did you identify a message? Are you using an oscilloscope? I've looked at the HS CAN on a scope in a few vehicles, mainly for network troubleshooting, but I'm curious how I could identify which module is doing the talking to which module it's talking. I know it's a big question but any info would help.
You have to get a device for reading CAN. I have a P-CAN from PEAK.
Then you have to figure out which modules are sending which messages and then figure out what each one means. It is all in hex. You then have to figure out how to convert the hex into an actual value. So what I do is look for a particular message that I want to find. Say wheel speed. I know that comes from traction. So figure out what ids are traction and then what hex value changes with wheel speed. Then you have to compare that hex value to a actual wheels speed say in actual values in the SDS. Then figure out how to convert. Say hex is FA. Decimal value 255, wheel speed 25mph. Then get another value point and figure out the conversion. It can be a multiplier or simple add or minus or straight value.
The drive authorization unfortunately is a Hash function encoded message. The only way to break this down is with what is called brute force. Basically a program throughing values at it until one sticks. Then you can easily figure out the base message from that. This part is above my pay grade but I have talked to some folks about it and may pursue working on it. Although there may be easier methods of dealing with DAS.
whipplem104
11-09-2012, 02:51 PM #16(10-30-2012, 09:42 AM)raysorenson(09-30-2012, 08:06 PM)whipplem104 I just figured out the actual start message today. I still need to break down the authorization messages.
I know I may be asking too much, but how did you identify a message? Are you using an oscilloscope? I've looked at the HS CAN on a scope in a few vehicles, mainly for network troubleshooting, but I'm curious how I could identify which module is doing the talking to which module it's talking. I know it's a big question but any info would help.
You have to get a device for reading CAN. I have a P-CAN from PEAK.
Then you have to figure out which modules are sending which messages and then figure out what each one means. It is all in hex. You then have to figure out how to convert the hex into an actual value. So what I do is look for a particular message that I want to find. Say wheel speed. I know that comes from traction. So figure out what ids are traction and then what hex value changes with wheel speed. Then you have to compare that hex value to a actual wheels speed say in actual values in the SDS. Then figure out how to convert. Say hex is FA. Decimal value 255, wheel speed 25mph. Then get another value point and figure out the conversion. It can be a multiplier or simple add or minus or straight value.
The drive authorization unfortunately is a Hash function encoded message. The only way to break this down is with what is called brute force. Basically a program throughing values at it until one sticks. Then you can easily figure out the base message from that. This part is above my pay grade but I have talked to some folks about it and may pursue working on it. Although there may be easier methods of dealing with DAS.
Messages In This Thread
OM648 swap into a w123 - by whipplem104 - 09-10-2012, 04:59 PM
RE: OM648 swap into a w123 - by aaa - 09-10-2012, 06:27 PM
RE: OM648 swap into a w123 - by JustPassinThru - 09-11-2012, 01:35 AM
RE: OM648 swap into a w123 - by whipplem104 - 09-11-2012, 10:49 AM
RE: OM648 swap into a w123 - by Tmadia - 09-11-2012, 04:12 PM
RE: OM648 swap into a w123 - by whipplem104 - 09-15-2012, 09:48 AM
RE: OM648 swap into a w123 - by HoleshotHolset - 09-16-2012, 07:58 PM
RE: OM648 swap into a w123 - by diesel2fast4u - 10-30-2012, 01:39 AM
RE: OM648 swap into a w123 - by whipplem104 - 09-16-2012, 09:12 PM
RE: OM648 swap into a w123 - by HoleshotHolset - 09-16-2012, 09:17 PM
RE: OM648 swap into a w123 - by Punchi - 09-30-2012, 04:06 PM
RE: OM648 swap into a w123 - by majesty78 - 09-30-2012, 04:57 PM
RE: OM648 swap into a w123 - by Punchi - 09-30-2012, 05:10 PM
RE: OM648 swap into a w123 - by whipplem104 - 09-30-2012, 08:06 PM
RE: OM648 swap into a w123 - by raysorenson - 10-30-2012, 09:42 AM
RE: OM648 swap into a w123 - by whipplem104 - 11-09-2012, 02:51 PM
RE: OM648 swap into a w123 - by whipplem104 - 08-07-2013, 07:46 PM
RE: OM648 swap into a w123 - by giorgosktel82 - 12-01-2013, 05:13 PM
RE: OM648 swap into a w123 - by whipplem104 - 12-04-2013, 03:36 PM
RE: OM648 swap into a w123 - by Ksteen2 - 12-06-2013, 04:03 AM
RE: OM648 swap into a w123 - by whipplem104 - 12-06-2013, 09:11 AM
RE: OM648 swap into a w123 - by giorgosktel82 - 12-08-2013, 01:49 AM
RE: OM648 swap into a w123 - by whipplem104 - 12-08-2013, 10:11 AM
RE: OM648 swap into a w123 - by giorgosktel82 - 12-08-2013, 03:31 PM
RE: OM648 swap into a w123 - by whipplem104 - 12-08-2013, 08:21 PM
RE: OM648 swap into a w123 - by Ksteen2 - 12-09-2013, 02:48 AM
RE: OM648 swap into a w123 - by majesty78 - 12-11-2013, 02:51 AM
RE: OM648 swap into a w123 - by giorgosktel82 - 12-09-2013, 12:45 PM
RE: OM648 swap into a w123 - by whipplem104 - 12-10-2013, 05:24 PM
RE: OM648 swap into a w123 - by giorgosktel82 - 12-11-2013, 01:42 PM
RE: OM648 swap into a w123 - by whipplem104 - 12-11-2013, 03:00 PM
RE: OM648 swap into a w123 - by mike-81-240d - 12-11-2013, 04:40 PM
RE: OM648 swap into a w123 - by whipplem104 - 12-11-2013, 05:01 PM
RE: OM648 swap into a w123 - by mike-81-240d - 12-11-2013, 05:47 PM
RE: OM648 swap into a w123 - by giorgosktel82 - 12-12-2013, 04:24 AM
RE: OM648 swap into a w123 - by whipplem104 - 12-12-2013, 09:06 AM
RE: OM648 swap into a w123 - by Druk - 12-12-2013, 09:33 AM
RE: OM648 swap into a w123 - by whipplem104 - 12-12-2013, 01:14 PM
RE: OM648 swap into a w123 - by giorgosktel82 - 12-12-2013, 01:29 PM
RE: OM648 swap into a w123 - by AlanMcR - 12-12-2013, 02:57 PM
RE: OM648 swap into a w123 - by Druk - 12-12-2013, 05:21 PM
RE: OM648 swap into a w123 - by whipplem104 - 05-18-2014, 10:19 AM
RE: OM648 swap into a w123 - by Druk - 05-18-2014, 11:00 AM
RE: OM648 swap into a w123 - by whipplem104 - 05-18-2014, 07:58 PM
RE: OM648 swap into a w123 - by whipplem104 - 05-19-2014, 11:09 AM
RE: OM648 swap into a w123 - by merc mek - 08-05-2014, 05:28 AM
RE: OM648 swap into a w123 - by whipplem104 - 08-07-2014, 03:47 PM
RE: OM648 swap into a w123 - by whipplem104 - 09-21-2014, 09:49 AM
RE: OM648 swap into a w123 - by whipplem104 - 11-25-2015, 12:54 PM
RE: OM648 swap into a w123 - by TKMad - 11-25-2015, 02:28 PM
RE: OM648 swap into a w123 - by M-ic - 11-27-2015, 02:57 PM
RE: OM648 swap into a w123 - by whipplem104 - 11-28-2015, 11:05 AM
RE: OM648 swap into a w123 - by Tobulus - 12-01-2015, 06:07 AM
RE: OM648 swap into a w123 - by whipplem104 - 12-01-2015, 09:15 AM
RE: OM648 swap into a w123 - by whipplem104 - 04-14-2016, 04:37 PM
RE: OM648 swap into a w123 - by North_Star - 04-16-2016, 05:03 PM
RE: OM648 swap into a w123 - by whipplem104 - 08-03-2016, 09:49 AM
RE: OM648 swap into a w123 - by atypicalguy - 08-04-2016, 08:57 PM
RE: OM648 swap into a w123 - by whipplem104 - 08-30-2016, 03:11 PM
RE: OM648 swap into a w123 - by whipplem104 - 09-28-2016, 02:01 PM
RE: OM648 swap into a w123 - by bkc - 09-28-2016, 10:09 PM
RE: OM648 swap into a w123 - by SurfRodder - 09-29-2016, 01:50 AM
RE: OM648 swap into a w123 - by whipplem104 - 09-29-2016, 11:43 AM
RE: OM648 swap into a w123 - by whipplem104 - 10-04-2016, 01:26 PM
RE: OM648 swap into a w123 - by whipplem104 - 10-06-2016, 03:25 PM
RE: OM648 swap into a w123 - by TKMad - 10-07-2016, 12:58 PM
RE: OM648 swap into a w123 - by whipplem104 - 10-07-2016, 02:18 PM
RE: OM648 swap into a w123 - by starynovy - 10-09-2016, 05:04 AM
RE: OM648 swap into a w123 - by whipplem104 - 10-09-2016, 09:10 AM
RE: OM648 swap into a w123 - by whipplem104 - 10-13-2016, 11:08 AM
RE: OM648 swap into a w123 - by Frankencar - 02-03-2017, 10:52 PM
RE: OM648 swap into a w123 - by whipplem104 - 10-17-2016, 04:25 PM
RE: OM648 swap into a w123 - by whipplem104 - 10-23-2016, 06:25 PM
RE: OM648 swap into a w123 - by whipplem104 - 10-28-2016, 02:35 PM
RE: OM648 swap into a w123 - by starynovy - 10-29-2016, 09:02 AM
RE: OM648 swap into a w123 - by whipplem104 - 10-31-2016, 08:58 AM
RE: OM648 swap into a w123 - by whipplem104 - 10-31-2016, 01:23 PM
RE: OM648 swap into a w123 - by starynovy - 10-31-2016, 06:33 PM
RE: OM648 swap into a w123 - by mike-81-240d - 12-04-2016, 03:57 AM
RE: OM648 swap into a w123 - by whipplem104 - 12-06-2016, 01:16 PM
RE: OM648 swap into a w123 - by whipplem104 - 12-06-2016, 01:23 PM
RE: OM648 swap into a w123 - by 50harleyrider - 01-26-2017, 06:20 AM
RE: OM648 swap into a w123 - by whipplem104 - 01-26-2017, 09:01 AM
RE: OM648 swap into a w123 - by M-ic - 01-29-2017, 07:32 AM
RE: OM648 swap into a w123 - by whipplem104 - 01-29-2017, 02:31 PM
RE: OM648 swap into a w123 - by 50harleyrider - 02-01-2017, 06:58 AM
RE: OM648 swap into a w123 - by whipplem104 - 02-01-2017, 01:40 PM
RE: OM648 swap into a w123 - by baldur - 02-02-2017, 06:04 PM
RE: OM648 swap into a w123 - by SurfRodder - 02-03-2017, 08:52 AM
RE: OM648 swap into a w123 - by whipplem104 - 02-04-2017, 11:05 AM
RE: OM648 swap into a w123 - by SurfRodder - 02-08-2017, 04:04 PM
RE: OM648 swap into a w123 - by Porkymerc - 02-05-2017, 03:18 PM
RE: OM648 swap into a w123 - by whipplem104 - 02-05-2017, 05:52 PM
RE: OM648 swap into a w123 - by Porkymerc - 02-06-2017, 03:24 PM
RE: OM648 swap into a w123 - by whipplem104 - 02-06-2017, 04:23 PM
RE: OM648 swap into a w123 - by Porkymerc - 02-06-2017, 04:50 PM
RE: OM648 swap into a w123 - by M-ic - 02-15-2017, 02:47 PM
RE: OM648 swap into a w123 - by whipplem104 - 02-16-2017, 10:35 AM
RE: OM648 swap into a w123 - by starynovy - 02-17-2017, 03:39 AM
RE: OM648 swap into a w123 - by tmoney - 12-16-2018, 12:39 AM
RE: OM648 swap into a w123 - by Jeepinaround - 07-13-2020, 11:24 AM
RE: OM648 swap into a w123 - by a_l-1028 - 08-04-2021, 10:36 PM
RE: OM648 swap into a w123 - by TE27Levin - 08-07-2021, 01:52 PM
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