ASR is anti slip regulation, it stops the wheel from slipping by retarding engine timing to reduce engine torque to the transmission. ESP is electronic stabilization program that works with ASR,EDL and the wheel speed sensors to help the driver maintain their intended course by generating corrective forces mostly when making sudden maneuvers like avoiding an accident.

 

The ESP has a series of pitch and yaw gyroscopes that determine, based on those inputs and inputs from the steering angle sensor and the wheel speed sensors, whether the car is going into a spin. In order to break out of the spin, it selectively brakes the necessary wheel to make the car pivot out of the spin.

ASR comes into play with ESP, but what ASR does primarily is prevent wheelspin by braking the spinning wheel and backing off the electronic throttle.

All ESP cars have ASR, but not all ASR cars ave ESP. If you have a button on the console marked ESP, you have ESP. If you have a button marked ASR, you have ASR and no ESP.

 

That was quick, I was wondering since I have seen some Passats with ASR and some with ESP. By the way is the ASR supposed to kick in when the driver's side wheel spins? Mine only activates when the passenger wheel spins, never for the driver's side.

 

ASR should activate when either of the front wheels spin. My guess is that for you, every time the ASR came on it happened to be by coincidence that the passenger side wheel had less grip. Try gunning it while taking a left turn. The inside (drivers) side wheel will be unloaded, have less grip, and will therefore have less grip. I know this happens in my mother's 01 Volvo V70, only Volvo call it STC in stead of ASR.

(I only mention the Volvo since I get my license in about 3 weeks. I'm still on my learner's permit >_<. There's an 02 1.8T 5 speed Passat GLS w/ 4Motion on the local VW dealer's lot with my name on it! Nothing can beat the Passat for the money.)

 

My ASR sucks.... Maybe its my tires lol

 

Passat2.8, could be your driver's side ABS sensor isn't working right, and the computer hasn't caught the fault...

 

I just took a hard left turn on snow, this activated the ASR from my driver's side wheel...finally. The passenger side wheel must be the drive wheel, which makes it spin first. Which is why it activates ASR before the other wheel.

 

The passenger side wheel must be the drive wheel, ....

:crazy:
Go on a diet or carry a passenger of equal mass, you are putting too much load on the driver's side drive wheel making it less likely to slip.
Or maybe the brake on the driver's side is dragging all the time, or a bad bearing, or it has a more worn tread, or different air pressure, or something.

An open differential is dumb. If one of the two equally powered drive wheels has less coefficient of friction, that is the one that will spin first. For some reason you have been aware of engine output torque exceeding that which the easier to spin tire can hold only when that has been the passenger side tire. Time to investigate why it isn't just as likely to be the driver's side, and it's NOT because you have a 1 wheel drive car.

 

ASR - anti slip regulation, ESP is what you wish you had when tried to do something and looked like an idiot cause the ASR is still on

 

Chill, that's not what I meant by it being the drive wheel. I meant that it is the wheel that will spin first. It is the wheel that naturally has more torque applied. If it was a Posi-unit, both wheels would spin almost equally. It is most likely a standard differential in our VW's, which would cause this to happen in my car. For example, a friend of mine has a Nissan 240sx that has his passenger rear wheel spin first and burn out, rarely if ever does his driver's side spin equally. He has a standard diff. Drag racers have posi-diffs, both wheels spin equally.

 

Seems a good question.
I've always been able to get both wheels to spin in a burnout. Two black streaks on pavement.
But it probably is an open diff.
Perhaps in our Passats it is a limited-slip diff to some degree?
Anyone with knowledge of the ZF tip know the answer to this?
Or maybe EDL is very subtle and works very well, even with ASR off.
What do you think?

 

limited slip seems about right but i know for sure one tire spins sometimes and the other one doesnt, or both at the same time

 

no there is not any type of limited slip in the passat its completely open, but you have to remember, equal length half shafts mean torque steer is not an issue so that means there is the same force on both sides of the tranny, if you get both tires spinning on the same surface they will both spin, if its 2 different surfaces the side with less traction will spin only.

 

So was ESP an option on the Passat?
Mine has ASR, and my friends GTI has ESP.

 

ESP was definitely optional on the B5.5
My question is does the EDL still function when ASR is switched off? I suspect not, and EDL is just a side effect of ASR's spin reduction. Too bad, Snow season is coming soon.

 

Yes, if you disable ASR, you won't get EDL. (EDL isn't a "side-effect", it's an integral part of the ASR system... without it, ASR would just be throttle cuts; not very useful.)

 

Ahh, yes. If only we could have the EDL activity without the throttle cut back. Any chip tuning programs known to have an effect on that, BTW? (Yes I'm 33, and still want to act totally immature in my car.