Brake Assist level?

Hi, just wondering what this actually does.

Heard people talk about adjusting this with the vagcom.

I was wondering what else I can adjust...

like Steering stiffness, etc.?

i heard that the MY 06 gti can adjust the stiffness of the steering wheel ...

Contrary to steering adjustments* I noticed a remarkable difference when I changed
the brake assist level from '00' to '02'.
Don't set '01' as the brake assist will even intevene earlier then.

With '02' brake modulation is improved significiently when applying the brakes very
hard on track and it's much easier to prevent ABS intervention.



* I tried several steering settings on my first Mk.V and they showed different lightnesses,
but no real progress in precision. My GTI already had the stiffest setting from factory.

Hey bruce can u show us how to set up the break assistance and steering wheel stiffness? ...

Thread jack time ... I autox last weekend. My tires were locking up everytime I braked hard after a fast straight. Is there a vagcom setting I can change so this doesn't happen again? ...

I don't remember the steering setting with VCDS, but the brake assist should be
found on channel '09'. You will surely find more info here:

http://www.golfmkv.com/forums/showthread.php?t=167216

LOUCFUR said:

Thread jack time ... I autox last weekend. My tires were locking up everytime I braked hard after a fast straight. Is there a vagcom setting I can change so this doesn't happen again? ...

Click to expand...

That's what we're talking about. The main issue is not the ABS (although you might think).
The main issue is brake assist.
When you hit the brake quickly (common on track after a straight) the brake assist does
"think" this is an emergency situation and you need help. The brake assist opens a valve
(metaphorically speaking) and applies full brake force - don't matter how smoothly you
modulate the brake pedal.
No wonder with full brake pressure the ABS engages . . .


Set the brake assist to '02' if possible and you will be able to modulate the brakes as
you want - not as the brake assist wants. The brake assist is still there, but much more
reluctant than before.

:thumbsup:

Awesome ... Thx ^ ... It's the 1st time I've felt that at autox. And I tried braking early, late, hard, soft. But I always had the same results ...

Can you please elaborate on the levels?

Brake - 0 = Stock, brake assist on full?
1 = ?
2 = Hard, no brake assist?


Also on the Steering setting...
0= stock , stiffest?
1 = ?
2 = loosest?

Brake

channel 09:

00 = stock, brake assist on medium
01 = BA on full (early intervention)
02 = BA on "late" (almost no interventions)

I tried them all. Unfortunately it can't be disabled completely. :frown:
Not a big problem though as "late" means really late. :wink: All three settings
are remarkably different. '01' is extremely early and annoying to drive when
hitting the pedal quickly. I was standing it one day, then went to '02'.


I don't remember the steering settings as it's years ago I have tried them out.
I'm sure you will find the info on the web though as many Golf owners did hope
to get some GTI feeling by copying the GTI setting.

the bruce said:

Brake

channel 09:

00 = stock, brake assist on medium
01 = BA on full (early intervention)
02 = BA on "late" (almost no interventions)

Click to expand...

Bruce, is it based on somekind of technical document? If so, would you give us the source? Well, I tried them all and it is my hunch... so I don't really know the truth.


Mine is 06 model, can change steering assist force. On weekend, I'll show you how to do that.
00= stock, brake assist on medium
01= I felt its has less brake force than 00.
02= enhanced brake force, even when ESP applies brake, its force enhanced too.

Regarding intervention timing, 00, 01, 02 are not much difference.

That is how I felt.

Mine is 06, can change steering force. I'll show you how this weekend.

I didn't notice in brake force itself. The brake assist is known for 10 years as increasing
brake force when hitting the pedal extremely fast. The BA suspects an emergency case.
Keep in mind most avarage drivers hit the brakes without the necessary force to engage
ABS. This is described in several VAG SSPs.

Of course our aim is different, we are no grannies.

I didn't read the BA settings anywhere in SSPs or on the web. This function is not
documented well. I had a talk with a VW engineer and he told me where to look with
VCDS. I had to make my on testing on the three settings.

the bruce said:

I didn't notice in brake force itself. The brake assist is known for 10 years as increasing
brake force when hitting the pedal extremely fast. The BA suspects an emergency case.
Keep in mind most avarage drivers hit the brakes without the necessary force to engage
ABS. This is described in several VAG SSPs.

Of course our aim is different, we are no grannies.

I didn't read the BA settings anywhere in SSPs or on the web. This function is not
documented well. I had a talk with a VW engineer and he told me where to look with
VCDS. I had to make my on testing on the three settings.

Click to expand...

I couldn't find any BA document for our cars... so still this mod changing value is a mystery to me. What I though was, by changing value increases/decreases initial braking force, not the assist timing. Probably a maximum braking force are all the same, but it differs the basic hydraulic force.

Did some easy experiments in the past. Apply brake with same force and stroke (which I think...) to stop from 60kmh at the particulary defined line.

Preset was 02, drove my car for more than a month, then changed value to 00, I over run the line every 5 times. Then, I stayed value 00 for another month, did samething next month. Value 02 made me stop before the line every 5 times.

With same pads, same rotors, from same speed, got myself used to the setting more than a month. Not a hard braking like I used to do on a track, its like when I used to stop at a red signal.

But all these maybe a placebo effect.
I want to know how monitor this to check it by using vcds.

This easy test was done at the straight way (actually a supermarket parking space at night), so I think no ESP intervention. Regarding ESP, once I ran race track with 00 and 02 setting, both intervened at the same corner, but the brake grabs much stronger when 02, that was my impression.

Brake Assist is an algorithm that attempts to determine if you are in a panic-stop situation. If it decides that you are, it applies maximum braking pressure, regardless of the pressure you are actually applying to the pedal.

Why? There was a study done a few years ago that showed the average driver sometimes does not make maximum use of the brakes in an emergency situation. One reason is that few people have actual experience and practice with maximum braking and tend to be wimpy about it. Another reason is that the pulsing of of the ABS actually spooked some people into coming off the pedal. These facts led to the conclusion that that Brake Assist intervention could save some lives. Bravo, I say.

The problem on the track is that BA is either ON or OFF. It is hard to modulate the brakes with BA kicking in and out in a long braking zone. I am glad to learn that the threshold of BA can be adjusted via VAGCOM.

It seems to me that there should be no difference in stopping distance between a BA stop and a mash-the-pedal non-BA ABS stop, though.

Yeah, Dynjo, you're right with the exception of the last sentence.

I'd like to add that there is a difference in stopping distance. A skilled and experienced
driver is able to reach even better negative acceleration with proper modulation than
ABS. He will be able avoid ABS interventions if no brake assist kicks in.
A smooth turning wheel is capable of transfering higher forces than an ABS-modulated
wheel.

so 02 for Brake assist is where WE should have it!