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Thread: CAN Bus Speed?

  1. #1
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    Default CAN Bus Speed?

    What exactly is CAN Bus Speed?

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    It's the baud rate of communication transmission. There are 3 Classes used in the car, A, B, and C. The baud rates range from 10Kbps to 1Mbps. Your internet connection speed is a baud rate.
    Last edited by Prop1; 04-07-2009 at 06:59 AM.
    Brad






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    thank you very much Brad

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    What are the rates used for the Cali MY07 and the upgraded MY09?
    replaced - hub bolts, warped rotors, 3 batteries, 2 screens, 12 alloy wheels, seat cover, armrest, Track-rod ends, clutch master cylinder, LH tail unit, LCAs, rear toe link,

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    Quote Originally Posted by Aleks View Post
    What are the rates used for the Cali MY07 and the upgraded MY09?
    What I stated above. There has been no change between the years.
    Brad






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    Quote Originally Posted by Prop1 View Post
    What I stated above. There has been no change between the years.
    I was thinking of the thread below imagining it was a USB 1.0 to USB 2.0 type change. So are there three speeds operating on our Canbus and just the Stereo connection got upgraded?

    Quote Originally Posted by rmurad38 View Post
    the Caliber, as with many other DCX vehicles switched from the low to High speed CAN Bus system. The REC is a Low speed device. My 07 (slow speed bus) took the REC without issue, simple plug and play.
    It get confusing with the High Speed Bus vehicles. I do not know if they are backwards compatible with low speed devices. the RER is the "new hotness" so to speak. To add one more layer of complexity, it came/comes in 2 varieties.. a low and high CAN Bus speed version.. I believe either work in the High Speed Vehicles (not sure on the '08) but only the slow one works w/ an 07.

    rmurad38
    replaced - hub bolts, warped rotors, 3 batteries, 2 screens, 12 alloy wheels, seat cover, armrest, Track-rod ends, clutch master cylinder, LH tail unit, LCAs, rear toe link,

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    Quote Originally Posted by Aleks View Post
    I was thinking of the thread below imagining it was a USB 1.0 to USB 2.0 type change. So are there three speeds operating on our Canbus and just the Stereo connection got upgraded?
    CanBus has become a catch-all phrase. LinBus is for the lowest data-rate functions, CanBus for medium speed, MostBus for the high-speed data rates, and FlexRayBus is for safety-critical applications such as steer- and brake-by-wire. Each of these operate in one of the three Classes (A, B, C).

    What Class the sensors and controls operate at is only an assumption based on my years in and around electronics, but I would assume Class B. The radio and lights would probably be Class A, The slowest. I was working on and designed similar circuits for military planes back in the late 80s. That's how old this technology is. But I was on the leading age of technology, then.
    Brad






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    Yeah "Fly-by-Wire" at least it's transferable technology.

    So would you say it was still true that the later head units can not be used in the earlier Calibers due to the Bus speed data rates?
    replaced - hub bolts, warped rotors, 3 batteries, 2 screens, 12 alloy wheels, seat cover, armrest, Track-rod ends, clutch master cylinder, LH tail unit, LCAs, rear toe link,

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    Quote Originally Posted by Aleks View Post
    Yeah "Fly-by-Wire" at least it's transferable technology.

    So would you say it was still true that the later head units can not be used in the earlier Calibers due to the Bus speed data rates?
    I seriously doubt that the bus speed is any different for the radios.
    Brad






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    Standardizing In-vehicle LAN Interfaces Covering Multiple Functional Areas
    Article gives info on background to Auto Data Standards.

    ForumZ thread about the later head units and earlier Calibers
    replaced - hub bolts, warped rotors, 3 batteries, 2 screens, 12 alloy wheels, seat cover, armrest, Track-rod ends, clutch master cylinder, LH tail unit, LCAs, rear toe link,

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