What type of CAN bus is the medium speed BUS
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So I have been trying to learn me something about the CAN system on the LR3, but I am no expert, and I am little confused about the Medium Speed...
From wikipedia I have this about high speed CAN - "ISO 11898-2, also called high speed CAN, uses a linear bus terminated at each end with 120 Ω resistors"
That lines up with the LR3, but wikipedia only references low-speed CAN "ISO 11898-3, also called low speed or fault tolerant CAN, uses a linear bus, star bus or multiple star buses connected by a linear bus and is terminated at each node by a fraction of the overall termination resistance. The overall termination resistance should be about 100 Ω, but not less than 100 Ω."
Land rover documents I have read about the CAN bus mention that some control modules are connected using a 'spur' connection, which to me suggests low speed CAN, but I can't find which modules are connected in a spur configuration.
CAN Buses are standardized systems mandated by OBDII. So I don't think land rover has much wiggle room in deviation. My question is basically this; is the medium speed CAN a high speed or low speed CAN? Oh and does anyone know which modules are 'spur' connected?
From wikipedia I have this about high speed CAN - "ISO 11898-2, also called high speed CAN, uses a linear bus terminated at each end with 120 Ω resistors"
That lines up with the LR3, but wikipedia only references low-speed CAN "ISO 11898-3, also called low speed or fault tolerant CAN, uses a linear bus, star bus or multiple star buses connected by a linear bus and is terminated at each node by a fraction of the overall termination resistance. The overall termination resistance should be about 100 Ω, but not less than 100 Ω."
Land rover documents I have read about the CAN bus mention that some control modules are connected using a 'spur' connection, which to me suggests low speed CAN, but I can't find which modules are connected in a spur configuration.
CAN Buses are standardized systems mandated by OBDII. So I don't think land rover has much wiggle room in deviation. My question is basically this; is the medium speed CAN a high speed or low speed CAN? Oh and does anyone know which modules are 'spur' connected?
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#9
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I'm getting old. This sort of talk makes me long for the old days when all you needed was 12v plus some fuel and you were in business.
I'm becoming a dinosaur.
Of course, I know Volkov is trying to go even simpler than that on his 101 and do away with even the need for 12v. Though I want to see him pump up that air starter by hand - I'll be sure to have a cold beer waiting in my 12v fridge for once he's done.
I'm becoming a dinosaur.
Of course, I know Volkov is trying to go even simpler than that on his 101 and do away with even the need for 12v. Though I want to see him pump up that air starter by hand - I'll be sure to have a cold beer waiting in my 12v fridge for once he's done.
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#10
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Dave Plummer
General Range Rover Discussion - Archived
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06-17-2012 08:18 PM