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CAN and multiplex (Read 249 times)

fisher Super Nerd Picogroup Offline Deceased Posts: 2,734 Concord California USA Gender:	CAN and multiplex Mar 1^st, 2015 at 9:32pm Might someone steer me towards some CAN and multiplexing literature fit for an automotive technician?
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Logic LSD Guide Picogroup Offline Posts: 4,147 Bentleigh Victoria Australia	Re: CAN and multiplex Reply #1 - Mar 1^st, 2015 at 11:16pm Fisher, I have been consistently doing that, there is quite a lot of information here that I have posted....
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Derreck LSD Guide Picogroup Offline It's getting better all the time... Posts: 2,367 Murray 535 ft Kentucky USA Gender:	Re: CAN and multiplex Reply #2 - Mar 2^nd, 2015 at 11:51am http://www.autonerdz.com/yabbfiles/Attachments/can20.pdf Here's a good start Fisher. Get some coffee ... it's a tough read
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fisher

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Re: CAN and multiplex
Reply #3 - Mar 3^rd, 2015 at 8:24pm

Thank you fellows. I found your stuff, Logic. It has been my first experience with a CAN system these last few weeks; a Ford E-450 van with 6.0 litre. It is an ex-ambulance/emergency vehicle sold to my employer by an unscrupulous player, I think.
It has multiples of codes, some related to the CAN network and others from differing modules regarding low voltage or open circuits. I will probably work no more on it as practically any components on it are inaccessible except with more hours of disassembly and removal of parts for to get access to the components than I want to spend on it. Let us see what the local dealership can do for us.
I did get a capture of it's network but am having a hard time getting it to post here...

Ford_E-Series_Van_2008_Diesel_20150301-0001.psdata (10092 KB | )

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Tom Roberts Autonerdz Administrator Picogroup Offline Autonerdz Founder Posts: 8,598 Olympia Washington USA Gender:	Re: CAN and multiplex Reply #4 - Mar 4^th, 2015 at 8:30am Fisher, Not sure where all that waviness is coming from on your CAN lines. If you deploy a math channel A-B it cleans it right up.
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fisher Super Nerd Picogroup Offline Deceased Posts: 2,734 Concord California USA Gender:	Re: CAN and multiplex Reply #5 - Mar 4^th, 2015 at 6:00pm I see what the math channels proves; that the two are parallel to each other...how about this trace?
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fisher Super Nerd Picogroup Offline Deceased Posts: 2,734 Concord California USA Gender:	Re: CAN and multiplex Reply #6 - Mar 4^th, 2015 at 6:02pm It is at moment 706.4.
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Logic LSD Guide Picogroup Offline Posts: 4,147 Bentleigh Victoria Australia	Re: CAN and multiplex Reply #7 - Mar 11^th, 2015 at 3:07am I have come across a case of CAN multiplex today where there are several signals in one byte of a CAN message where each bit is a different signal, not just each byte/s of the CAN message
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