shipy Posted September 5, 2006 Report Share Posted September 5, 2006 Does anyone know if the CAN interface is required to enable Cruise control, looked at Ross Tech and they say only some control modules require it. Rgds Lyndon Link to comment Share on other sites More sharing options...
TDiAvant Posted September 5, 2006 Report Share Posted September 5, 2006 You will need a can bus lead to program cruse on the B7. Link to comment Share on other sites More sharing options...
craigyb Posted September 5, 2006 Report Share Posted September 5, 2006 Although the B7 is not equipped with a CAN gateway like the A3/A6/A8 and Q7, it does have CAN connections to its diagnostic port connected directly to the cluster. So it looks like you would need a CAN enabled lead for some of the functionality like the Ross Tech website says. Link to comment Share on other sites More sharing options...
Sebastian Posted September 5, 2006 Report Share Posted September 5, 2006 The instrument cluster is not connected with the diagnostic tool via CAN in a B7. The 1.8T in the very early B7's can be diagnosed via K-Line too - so cruise control enabling would not require a CAN capable interface. Link to comment Share on other sites More sharing options...
shipy Posted September 5, 2006 Author Report Share Posted September 5, 2006 [ QUOTE ] The instrument cluster is not connected with the diagnostic tool via CAN in a B7. The 1.8T in the very early B7's can be diagnosed via K-Line too - so cruise control enabling would not require a CAN capable interface. [/ QUOTE ] Mine is an April 2005 1.8T Quattro so it looks like i can buy the cheaper lead then. What sort of things would require CAN interface? Link to comment Share on other sites More sharing options...
craigyb Posted September 5, 2006 Report Share Posted September 5, 2006 Strange as this is what Elsawin says that from 2005... A2 - Positive connection (15), in dash panel wiring harness A32 - Positive connection (30), in dash panel wiring harness A57 - Positive connection 3 (30), in dash panel wiring harness A70 - Connection (15a, fuse 231), in dash panel wiring harness A76 - Connection (diagnosis wire K), in dash panel wiring harness A121 - Connection (high bus), in dash panel wiring harness A122 - Connection (low bus), in dash panel wiring harness A159 - Connection (L), in dash panel wiring harness Link to comment Share on other sites More sharing options...
Sebastian Posted September 5, 2006 Report Share Posted September 5, 2006 [ QUOTE ] Mine is an April 2005 1.8T Quattro so it looks like i can buy the cheaper lead then. What sort of things would require CAN interface? [/ QUOTE ] As far as I remember the very early B7's like yours havent't had any modules that talked via CAN, so the chances are high that a non-CAN interface will suffice. Nevertheless you should head for a real Ross-Tech interface since 3rd party ones won't work with any version newer than 409 and there have been a couple of things that you will find very useful when using current versions of the software. [ QUOTE ] Strange as this is what Elsawin says that from 2005... [/ QUOTE ] If you check the wiring diagram more closely, you'll notice that the A4 (B6/B7) has 3 different CAN databuses: CAN-Powertrain, CAN-Comfort and CAN-Infotainment. Unlike other current models, the A4 doesn't have a "real" CAN-Gateway, so the diagnostic tool uses mostly K-line except for some control modules that are connected to the CAN-Powertrain. The instrument cluster is connected to the CAN-Powertrain too, but it doesn't talk via CAN to the diagnostic tool. Here's a short excerpt from a VAG-COM control module finder listing. You'll see that there are 3 protocols used KWP-1281, KWP-2000 and CAN (actually KWP-2000 via CAN). Address 01: Engine Protocol: KWP2000 Controller: 03G 906 016 FE Component: R4 1,9L EDC 0000SG 7002 Coding: 0000071 Shop #: WSC 00000 Address 03: ABS Brakes Protocol: CAN Controller: 8E0 910 517 B Component: ESP8 front H04 0180 Coding: 0004401 Shop #: WSC 06335 Address 08: Auto HVAC Protocol: KW1281 Controller: 8E0 820 043 AK Component: A4 Klimaautomat 2728 Coding: 00000 Shop #: WSC 06335 Address 09: Cent. Elect. Protocol: KW1281 Controller: 8E0 907 279 J Component: int. Lastmodul ECE 0303 Coding: 00001 Shop #: WSC 06335 Address 16: Steering wheel Protocol: KW1281 Controller: 8E0 953 549 Q Component: Lenksáulenmodul 0601 Coding: 04011 Shop #: WSC 06335 Address 17: Instruments Protocol: KWP2000 Controller: 8E0 920 900 P Component: KOMBI+WFS 3 H12 0020 Coding: 0004041 Shop #: WSC 50563 Address 25: Immobilizer Protocol: KWP2000 Controller: 8E0 920 900 P Component: KOMBI+WFS 3 H12 0020 Coding: 0004041 Shop #: WSC 50563 Link to comment Share on other sites More sharing options...
craigyb Posted September 5, 2006 Report Share Posted September 5, 2006 Yes, but the cluster directly connects to the CAN and Diag port, I agree there is no gateway like the A3 etc. I also agree that to do things correctly you should have the correct lead with CAN. Link to comment Share on other sites More sharing options...
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