Canned Databus
Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=70509
Printed Date: May 03, 2024 at 11:32 AM
Topic: Canned Databus
Posted By: techguy688
Subject: Canned Databus
Date Posted: January 10, 2006 at 9:24 PM
Can someone give the scoop on the new canned databus on the new vehicles. What is it and how does it differ from Serial Databus.. Just trying to keep up. I know thr are some Certified Auto Techs out there..
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Just because you've done something for a long time doesn't mean you're any good at it.
Cable Ties Rock!
Replies:
Posted By: KPierson
Date Posted: January 10, 2006 at 10:30 PM
Can bus is a highly sophisticated communication bus. There are typically two wires, a high (Can H) and a low (Can L). Can bus' have a great error detecting capability, and a very high transfer rate. Each device on the bus is connected in parallel on the bus and each device comunicates selectively, and can pick out information sent directly to it. If I remember right there is no main controller in a canbus system, if two devices start communicating at the exact same time the one that goes low first will win the use of the line for its string. The coolest feature of Can (IMO) is that it technically can work if one line is cut, grounded, or shorted to (+) voltage. The devices will realize that one line has been compromised and switch to a one wire, low speed com protocol. Another somewhat cool thing is that Can bus devices will freak out if they are the only device on the line, they don't like talking to themselves! I hope this helps you in someway, I guess to sum it up Can is just a different protocol. Its basically considered an industry standard, and is used in cars and lots of other applications. And, for the record, Can Bus' are serial data bus' ------------- Kevin Pierson
Posted By: techguy688
Date Posted: January 11, 2006 at 7:27 PM
Thanks, What is a good source, manual or book on canned databus?? I have looked in some search engines but an actual reference would be good.. I appreciate you expertise.
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Just because you've done something for a long time doesn't mean you're any good at it.
Cable Ties Rock!
Posted By: jstruckman
Date Posted: January 12, 2006 at 5:13 PM
it is not canned, it is CAN, it stands for Controlled Area Network.
Jazzy
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Posted By: techguy688
Date Posted: January 12, 2006 at 6:56 PM
Thanks , More Please
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Just because you've done something for a long time doesn't mean you're any good at it.
Cable Ties Rock!
Posted By: gus1
Date Posted: January 12, 2006 at 10:17 PM
Bosch.de
Dig around on there for awhile... they have some excellent reading on the subject (they invented it)
Gus
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Wherever I go, that is where I end up......
Posted By: techguy688
Date Posted: January 15, 2006 at 9:45 AM
CAN Data. This is easier to find now that I know the right name. Thanks I found a few good sites. https://www.gmtcny.com/lan.htm https://www.picotech.com/auto/canbus.htm https://www.techonline.com/community/ed_resource/feature_article/22590 The bosch site is good too. www.bosch.com I ordered a free poster, DVD,and manuals from them(in English) Interesting site. They say by 2008 most vehicles will have the CAN bus. I hope the aftermarket bypass modules will keep up. Some say it will be easier to interface with CAN data in the future?? Have to wait and see.. ------------- Just because you've done something for a long time doesn't mean you're any good at it.
Cable Ties Rock!
Posted By: firstrax
Date Posted: January 18, 2006 at 11:23 PM
techguy688 wrote:
Thanks, What is a good source, manual or book on canned databus?? I have looked in some search engines but an actual reference would be good.. I appreciate you expertise.
SAE HS-3000 manual (expensive) and ISO 15765-4 have everything you could want to know about CAN including codes and protocols. The SAE manual also includes VPW and PWM data.
Posted By: firstrax
Date Posted: January 18, 2006 at 11:35 PM
techguy688 wrote:
They say by 2008 most vehicles will have the CAN bus. I hope the aftermarket bypass modules will keep up. Some say it will be easier to interface with CAN data in the future?? Have to wait and see..
CAN for OBD is mandatory by 2008. Most new cars are CAN now in addition to their old format. If pins 6 and 14 of the J1962 connector are populated its likely to be CAN compatible. The after market modules should have no problem keeping up. If not, I know what my next CAN project will be.
Posted By: 5150azn
Date Posted: January 19, 2006 at 11:17 AM
Any word on interfaces and stuff yet? Do you guys know if it will be a standardized CAN system for all cars or will it be different for each vehicle as it is now.
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Tell the Snap-On guy I'm not here!
Posted By: gus1
Date Posted: January 19, 2006 at 2:32 PM
There is one interface out there for some of the Euro stuff...... 2005.5 and newer.  Works pretty slickly...
It is scheduled to hit the market later this summer.
Gus
------------- Wherever I go, that is where I end up......
Posted By: 5150azn
Date Posted: January 19, 2006 at 3:34 PM
Thanks, any info is good info.
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Tell the Snap-On guy I'm not here!
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