Drive-by-Wire

[jdp1962]

I want to check whether my A4 (1999 post-facelift 2.8 Quattro Tiptronic) has a drive-by-wire throttle system. What do I look for?

It might sound a bit obvious, but it's never a stupid question if you'd don't the answer

Hope someone can help

JEFF

 

[excursion]

DBW cars had the CAN bus, which means you'll have a digital clock on your tacho /ubbthreads/images/graemlins/smile.gif

 

[Mutinyno9]

I was wondering why i got shafted with the non-digital clock

 

[DavidR]

[ QUOTE ]
excursion said:
DBW cars had the CAN bus, which means you'll have a digital clock on your tacho /ubbthreads/images/graemlins/smile.gif

[/ QUOTE ]

Digital clock does not equal CAN bus... The A3/A4 from 1999 had digital clock but no CAN bus.

Best way to check for DBW is to look at the intake plenum on the engine for a sign of a cable /ubbthreads/images/graemlins/smile.gif

 

[excursion]

Digital clock defiantely equals CAN bus. CAN & digital clock introduced 8/99, very few cars for 99 mostly all 2000. (You see a lot of 1999 facelift A4's with the analogue clock)

There are a few facelift cars that didn't have DBW and CAN, ones to get as respond well to tuning but have the facelift extras.

 

[jdp1962]

Mine's a 99 T-reg (I think it was July), and it has an analogue clock. The reason I want to know is that Fontain do a OEM cruise control retro-fit for £350, but it's only for DBW cars.

 

[excursion]

Confusing! 3 totally different combinations.

Facelift: Analogue clock
Facelift; Digital clock, non DBW, non CAN
Facelift; Digital clock, DBW & non CAN

I give up! lol

 

[Anito]

Looking at the manual it seems all cars from 99 onwards had electronically-operated throttle valve.

I can also find reference to cars from 96 onwards having Throttle position sensor whihc suggest to me that these cars had DBW also.

I'll do a bit more digging

 

[Anito]

Darn....

 

[DavidR]

[ QUOTE ]
Anito said:
I can also find reference to cars from 96 onwards having Throttle position sensor whihc suggest to me that these cars had DBW also.

[/ QUOTE ]

TPS has nothing to do with drive by wire.

 

[excursion]

An automatic may have some kind of throttle kicker solenoid, but no 96 had DBW. The earliest to have DBW was the S4, on Motronic management in 1998.

 

[jdp1962]

Thanks for the input, guys. I guess the only way to be sure is to get my head under the bonnet, remove the plastic hoardings & look for a throttle cable into the injection system.

 

[excursion]

Jeff - take a pic of your engine bay for me, and the T/B area

 

[jdp1962]

[ QUOTE ]
excursion said:
Jeff - take a pic of your engine bay for me, and the T/B area

[/ QUOTE ]

Cool! It'll be a day or two before I can do that, but cheers, pal. /ubbthreads/images/graemlins/beerchug.gif

 

[Anito]

Just got this back from someone else on another forum

"1.8T went to DBW in 2000. 2.8 went to DBW in 99.5. S4(2.7T) was always DBW"

 

[Patrick]

My 2p. My last 1997 S4 didn't have a digi clock but it was DBW. but then that's standard for the 2.7 twin turbo engine.