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doityourself D Hello, Could anyone tell me if the new POLO (9N31F4) has CAN-bus ? I'm interested in buying a vag-com interface for diagnostic and need to know which type. I've got 1.4 FSI engine, ESP, Climatronic, 2 airbags, central lock,factory-fitted alarm, and I want to see them all with VAG-COM. What do I need, KKL or CAN interface ? Thanks #1 · Feb 24, 2006 Hello, Could anyone tell me if the new POLO (9N31F4) has CAN-bus ? I'm interested in buying a vag-com interface for diagnostic and need to know which type. I've got 1.4 FSI engine, ESP, Climatronic, 2 airbags, central lock,factory-fitted alarm, and I want to see them all with VAG-COM. What do I need, KKL or CAN interface ? Thanks Sort by Oldest first Oldest first Newest first Most reactions #2 · Feb 24, 2006 Nope, still single K-line. The electronics is pretty much the same as the pre-facelift model. #3 · Feb 24, 2006 Re: (Theresias) Are you sure ? Pls take a look at https://erwin.volkswagen.de/er...60192 It's genuine VW info. #4 · Feb 24, 2006 Re: (doityourself)

Quote, originally posted by doityourself »

Are you sure ?

Yes, I am - otherwise the Polo (9N3) would be on the CAN page.

http://www.ross-tech.com/vag-com/canbus.html I do have several scans from 9N3's here, most modules KWP-1281, only ABS and Radio (RCD200) use KWP-2000. KWP-1281 is only possible via K-Line, while the 2 KWP-2000 modules still do K-Line too.

Quote, originally posted by doityourself »

It's genuine VW info.

The page you are referring to only shows the gobal use of CAN databusses, but this has nothing to do with diagnostics via CAN. Modified by Theresias at 4:10 PM 2-24-2006 #5 · Feb 25, 2006 Re: (Theresias) Thanks a lot for your pro help. That means that I don't need the CAN-bus tester from Ross-Tech, the KEY-USB Interface it's enough to test all systems, right ? #6 · Feb 25, 2006 Re: (doityourself)

Quote, originally posted by doityourself »

That means that I don't need the CAN-bus tester from Ross-Tech, the KEY-USB Interface it's enough to test all systems, right ?

Yup. #7 · Feb 25, 2006 Re: (Theresias) Thanks again, I'll do it. #8 · Jan 8, 2022 Looking at the wiring diagram of VW Polo 9n (2004) found in Autodata. It has CAN-H & CAN-L wires which lead to different modules. What does it actually mean if the car doesn't have a CAN Bus? As @Theresias said, when I take a look at the Control units (modules) information using scan tool, I see majority of them are using K-Line: KWP1281 Protocol, which is confusing to me. Would be nice if anyone can explain this here: Rectangle Product Slope Schematic Font

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