Cruise control retro fit to a 2.8 W reg A4 Quattro

[auroan]

Does anyone know if it's easy enough to retro fit cruise to a 2.8 2000 model year A4 quattro? (prays Stu or Lummox comes along)

My audi workshop manuals are on a HDD at work and I can't check straight off if the 2.8 is drive-by-wire or not.

[VRStu]

With the engine running and the throttle pressed so it's a little above tickover press the brake, does it return to tickover? If so then it's normally a good indication of DBW.

[auroan]

Ah I can't do that quite yet if you know what I mean

[Tech1e]

It should be, don't think i've seen a cabled 2.8.

[auroan]

yey !

[auroan]

Bum bum bum, just fitted the cruise stalk and login 11463 doesn't seem to enable it......

[auroan]

Oh damn, cruise is enabled but I can't confirm if I need an additional loom or not.

[VRStu]

I'm assuming by your post it isn't working then.

Have you got a fault code relating to the CC?

[auroan]

nope no fault codes. But I think I may have missed that I may or may not need a loom. I didn't notice any empty connectors when I put the steering wheel back together, but I could be wrong.

Problem is I can only find info on Passat B5 installations and not A4 B5s. Cruise is recognised as enabled as I can see the G in the engine desc of controller 01. But when I look at location 4 of the measuring block 066 it doesn't register any of the switch functions when I test.

It's all back together now so I'm going to have to strip it down again and check I'm not missing a connector/loom.

[VRStu]

Do you know if you have any wiring to the ECU from the bulkhead?

[auroan]

Looks like I need one of these;

KUFATEC GmbH - Kabelsatz GRA Audi A4 B5 TDI 30096

[VRStu]

Can't quite make out where that would plug into though. The pins on the free end look too big for the ECU.

[auroan]

Well I've managed to find the wiring diagram for my engine (2.8 APR) out of the 451 pages of diagrams I have.

Now I just have to figure what what the hell it means.

From looking at the diagram I think I've got it figured as to what pins match what from the cruise switch to the relavent ECU plugs. But what would wire T6y5 go to ? Is that the fused feed ? As it just goes to a box labeled 12 in the diag.

2.8 cruise switch.pdf

[VRStu]

T6Y will be a plug and then pin 5.

[auroan]

Yup understand that bit, but don't know what 12 in a box bit is ? Could it be the fuse number ?

[VRStu]

I've not seen the diagram yet, just installing acrobat

[VRStu]

Look at the numbers along the bottom of the drawing, 26 to 37.

The 12 relates to the same set of numbers on a previous drawing, it's a way of mapping several drawings together.

T6Y will be the plug on the stalk.

[auroan]

Hmmmm I'm confused now. So what does wire TY6/5 connect to. I have no reference to a diagram 12 anywhere on any of the other diagrams.

[auroan]

Ah hargh !!!!!!!!!!! I think I've got it. T6y/5 needs to connect to T10ar/5

Thanks for the help Stu.

[VRStu]

T10 isn't shown in the picture you posted so I assume that is where the 12 leads you to.

Is it a 12v supply from the fuse box or brake pedal?

[auroan]

Yes and no it is another connector in the row of ecu plugs (10-pin brown connector) It's the one where is needs splicing in rather than adding to the semi empty white connector. But it does look like its a 12v fuse feed

I realised what you meant my the numbers at the bottom and went back two pages and found it.

[auroan]

hummmpf. Cable arrived today, and fitted tonight (what a bugger of a job that is)

Cruise works.... but now I've either left a cable un plugged or damaged some wiring as my steering sensor is mooing in vagcom (including abs and esp lights).

So guess I'll be stripping it down again !!!!

[VRStu]

What fault codes do you have? Is it just to do with Basic Setting Adaptions because you've had the battery off?

[auroan]

I didn't log the fault so will have to scan it today again. But it's a fault in the ABS controller section of VAGCOM. Didn't think you needed to do basic settings for that.

[VRStu]

It depends what they are mate.

I know yours is an older car but the Audi's are normally a little ahead of the other VAG stuff. With the new Octy you nearly always get a steering angle fault or similar when fitting CC. Sometimes this is easily fixed by a few yards drive in a straight line but sometimes it also requires a basic setting.

Post up your Autoscan.