Golf 4: How to Enable/Disable ABS?

Hello.

Is it actually possible to make the ABS switchable via a switch in a Golf 4 TDI ARL, manufactured in 2002?

Sure, here is the translation of the text from German to English:

"MFG" is an abbreviation for "Mit freundlichen Grüßen," which means "Sincerely" or "Best regards" in English.

Does the Golf have a separate fuse for the ABS? If so, remove it.

Oli.

Or simply put a switch in a sensor line.

I would never do that.

m;

Does the Golf have a separate fuse for the ABS? If so, remove it.

Oli.

For example, in my Lupo, it might not work as expected because, to my knowledge, the electronic brake force distribution is also deactivated at the same time.

A switch in the sensor line would cause an error code to be stored (for those interested). I would rather make the power supply switchable. If you have ESP and ASR/EDS, those systems will also fail. Can we find out the reason?

HI,

As far as I know, cars with ABS no longer have a load-dependent adjustment for the rear brakes. Therefore, it is likely more dangerous to drive around with the ABS turned off than to drive without ABS at all.

Otherwise, I'd also like to know the reason... just because of a little bit of snow, on which it might be a few centimeters better without ABS? I would also avoid that... as soon as there's even a little bit of grip, ABS is clearly superior (go to an ADAC safety training... it's really impressive what the difference is between having and not having ABS).

Best regards,

Jan.

As far as I know, cars with ABS no longer have a load-dependent adjustment for the rear brakes.

Hello Jan,
Are you really sure about that?
My Alfa has ABS and a load-dependent control system, as well as ABS. In a Corrado, we had to replace this control unit after the TÜV (German technical inspection authority) had issues with it. That car also had ABS.

Well, all of them are vehicles with older systems. But if I remember correctly, I would have had to adjust the load-dependent setting on my Seat after lowering it.

Best regards, Jochen.

So, the Goelfe models no longer had that annoying TÜV lever on the rear axle, thanks to the introduction of ABS.

So, Jan is right.

m;

dieselmartin wrote:

So, the Goelfe models no longer had that stupid TÜV lever on the rear axle, thanks to ABS. So, Jan is right. m;

This doesn't relate to ABS, but rather to the Golf 4 (the G3 had it, and the G2 as far as I know). That was probably Jochens' problem. The statement: "no more BKR after ABS" is therefore incorrect.

My G3 VR6 AAA '93 has a BKR (I believe it's part number 1H0 612 151 C). It has ABS, just like the Corrado that Jochen mentioned.

@dieselmartin
Didn't your ex-G3 Variant 1Z also have a BKR (I think it was part number 1H0 612 151)?

No, Tom.

He had absolutely no background check.
To the best of my knowledge, the "Jetzt mach ichs mir selbst" manual specifically mentions that the Mark20 performs this function.

Therefore, when replacing the rear axle rubber-metal bushings on a Golf with ABS, the process is significantly easier because the screws on the left side can simply be unscrewed.

m;

Martin, don't weaken me .

I know that the G3 VR6 has a BKR, I'm not speculating . If I didn't have such a stupid camera (you know), I would send you a picture tomorrow (unless it's blurry, in which case that's okay too). My Etzold even describes how it needs to be tested.

http://www.amigo-autoteile.de/dl.php?nr=320111%2F712
http://www.originalanleitungen.de/shop/pub/more_downloads/VW0027.pdf (Page 5, 47-5 "Brake force regulators for vehicles with ABS").

I have no idea if the Variant model has the same part, which is why I'm asking. Where did I get this part number from? Well, never mind, you'll probably know about the Variant.

Regards,
Tom.

EDIT

I did some research.

The difference between having a BKR (Bremssättel Kalibrierungs Regelung - Brake Caliper Calibration System) or not likely depends on the version of the braking system. Both Passats & Variants, as well as Golfs & Variants, and Corrados were probably delivered (presumably until 1995/96) with the MK4 braking system. The MK20 no longer has a BKR, while the MK4 supposedly does. Therefore, my part numbers likely come from the MK4.

Here is a source: https://community.dieselschrauber.org/en/viewtopic.php?t=10356&highlight=

Essentially, the following applies: There are ABS systems with a mechanical brake force distribution (BKR), such as the MK4. Starting with the MK20 (followed by the MK60), an "electronic brake force distribution" was installed, which made the BKR obsolete (and better, as it was a vulnerable component and often problematic during the TÜV inspection).

Hi,

Sorry, I didn't mean to be right about that. As always, it seems that the transition period has resulted in a mix of different systems.

The fact is that, without the BKR (Bundeskriminalamt - Federal Criminal Police Office), temporarily shutting down the ABS (Automatic Border Surveillance) is an even worse idea than it normally would be.

I'm not sure how it works with my Ibiza either... it's a bit of a mix of parts from the VW range. At least it has the older ABS system, which controls both rear wheels together, so it has only three instead of four circuits. The instructor was quite surprised during the safety training when my Ibiza, during a full stop (left wheels on a smooth surface, right wheels on wet asphalt), drove perfectly straight ahead with the steering wheel loose and the brakes fully applied, contrary to his theory (even ABS cars tend to drift slightly to the right). We had a discussion about this once... I was able to explain to him that (because the system regulates the rear brakes more gently than necessary, one of the rear wheels provides perfect steering).

Best regards,

Jan.

Hello everyone!
While reading this thread, I came across some rather absurd ignorance and false statements, so I would like to clarify a few things here.
First of all:
There are Gölf models with a mechanical brake force limiter, and these models can have either ABS or lack it, depending on the year of manufacture.
The first Golf models that offered ABS as an option were the Golf II, starting with the 1986 model year. These vehicles were equipped with the three-channel, four-sensor ABS system from Conti-Teves, Mark 2. This system selectively controls the front wheels and, in a "Select-Low" configuration, controls the rear axle jointly to the rear wheel with the lower friction coefficient. The braking force is amplified hydraulically, and there is no conventional master cylinder or diagonal split. Instead, the brake cylinders, amplifier, and valve block form a large unit that is directly mounted to the brake pedal.
The basic front-to-rear brake force distribution in this ABS system is generated by the ABS hydraulic unit. Under normal circumstances, the brake pressure for the rear axle is generated purely hydraulically and electronically by the ABS module, depending on the front wheel brake pressure. There is absolutely no mechanical connection to the master cylinder or the brake pedal. Therefore, if the ABS fails or the ignition is switched off, these vehicles can only brake using the front axle. Secondly, this is also evident because bleeding the rear brakes using the conventional method with pumping does not work in this system.
To more precisely adjust the rear axle to the load conditions, the basic brake distribution is designed for a fully loaded vehicle. When the vehicle is unloaded, the mechanical brake force limiter, often mentioned here, reduces the braking force depending on the rear axle load. On the other hand, over-braking is not as critical here because the ABS immediately intervenes. Instead, it's more of a basic setting of the rear axle brake pressure, adjusted to the assumed vehicle load.
The Mark 2 was installed in all Volkswagen Golf II models, the Corrado, and earlier Passat 35I models. Later, it was also produced as the Mark 3 with EDS.
However, all of these ABS systems share one thing in common: they still have a mechanical brake force limiter.
The Golf III occupies a special position.
Up to the 1995 model year, the Conti/Teves Mark IV was used, which, unlike the Mark 2/3, is a true four-channel, four-sensor ABS system. This means that the rear axle is also individually controlled by the ABS, and conventionally, two brake circuits are created in a diagonal split. The separation of the master cylinder and the ABS unit also enables a wide range of possibilities and combinations for different brake force distributions, which can thus be designed much more optimally. The Mark 4 still has a conventional brake design for full load on the rear axle and an adjustment to the actual load via the well-known brake force limiter.
The Conti-Teves Mark20-I control unit was introduced starting with the 1995 model year and underwent a fundamental redesign. It was later used in the facelifted 3A0 and subsequently in the Polo 6N, but never in the Corrado, even until its end of production in 1995.
This ABS has been completely redesigned. It now includes an EBV, an electronic brake force distribution system. The basic layout is still diagonal and front/rear, based on the master cylinder ratios. However, a pressure reducer for the rear axle is now integrated into the ABS hydraulic block, which can prevent over-braking of the rear axle much faster and more precisely than the previous mechanical solution. So why should we continue to manufacture a significantly inferior, mechanical, and moreover, terribly expensive system, when it can be replaced with a system that is many times better, using only a fraction of the components and an electronic control system?
So, all vehicles from model year 95 onwards in the Golf with the Mark 20 KE engine no longer have a brake force distribution system on the rear axle, and neither do the 3A0 and 6N models!
If the ABS fails, then the EBV (Electronic Brake Force Distribution) also fails. In this case, the basic brake force distribution of the system is no longer optimal for many driving conditions. While it may work in some situations, it can also lead to over-braking of the rear axle in others. The Golf IV uses the Mark 20IE, which is an evolution of the ABS control algorithms, focusing on cleaner and faster operation, and integrates CAN communication with the engine control unit to enable ASR (Anti-Slip Regulation) in addition to EDS (Electronic Differential Lock).
It wasn't until the introduction of ESP with the MJ 2000 model year that the Mark 60, still used in the Golf V, incorporated ESP functionality. These cars no longer have a brake force distribution system. Deactivating the ABS is completely pointless and therefore no longer possible. Any interruption of the power supply will inevitably lead to error codes, especially in the Golf IV, where the ABS and engine control unit communicate via the powertrain CAN bus, if you remove fuses or do anything similar.
That's a good thing!
Best regards,
Matse.

Hello.

Okay, I think I'll skip it. It was just a question! My friend has an old Audi S2, and he said you can disable the ABS, which apparently makes it easier to brake on snowy roads. That's why I wanted to ask about it.

Sure, here is the translation of the text from German to English:

"MFG" is an abbreviation for "Mit freundlichen Grüßen," which means "Sincerely" or "Best regards" in English.