EPB Retrofit ... the way to Stop & Go

[dnoermann]

Hi, I'm a 2005 T5 owner and I'm wondering if any of these EPB units could be made to work? I only really want EPB functionally rather tha the ACC stuff ...I've not read all 13 pages so may have missed relevant content but hopefully someone can give me a clear answer. Not afraid of work. Cheers

T5 2005 is to old for that Standalone EPB Module.
You will need to upgrade your car to 2009+ technik to able to do it.
Other way is that you emulate everything else what is needed on the Canbus and install the Module together with the Simulator.

 

[JacobsMess]

T5 2005 is to old for that Standalone EPB Module.
You will need to upgrade your car to 2009+ technik to able to do it.
Other way is that you emulate everything else what is needed on the Canbus and install the Module together with the Simulator.

Thanks, emulation and dummy can signals is doable provided I can find canlogs, what parts are best to go with and what canbus messages do the EPB modules require?
I presume I'd need EPB rear calipers installed also or do these systems just remotely operate a cable/actuator?

 

[dnoermann]

Logs i can provide, next Year
You will need a Can Bridge, because you need at least to supply the Wheel Speed's to the EPB, it needs this to stop when the Wheel is Blocking ...
I have a list of all canmessages that are relevant, i did implement a bridge to do some hacking.
List is in my script used on rspberry pi, see here car-tools/Semi-Autohold/AutoHold.sh at master · dnoermann/car-tools

so any STM32 Microcontroller with 2 Can Ports is a good start ....
And yes you need to install the Actuators, as described in the early pages ...

 

[JacobsMess]

Logs i can provide, next Year
You will need a Can Bridge, because you need at least to supply the Wheel Speed's to the EPB, it needs this to stop when the Wheel is Blocking ...
I have a list of all canmessages that are relevant, i did implement a bridge to do some hacking.
List is in my script used on rspberry pi, see here car-tools/Semi-Autohold/AutoHold.sh at master · dnoermann/car-tools

so any STM32 Microcontroller with 2 Can Ports is a good start ....
And yes you need to install the Actuators, as described in the early pages ...

Thanks, yes I have an STM32 setup that should be able to do what I need... or possibly an ESP32.

One thing I am unsure of though, it seems that I need an ABS module that is capable of controlling the brakes for Emergency braking, my 2005 T5 has a very basic ABS setup so I suspect this isn't an option unless I retrofit a more modern ABS. Do you have a suggestion on the best way to address this?

 

[Robert]

Have a read below.

T6 ABS unit doesn't recognise EMERGENCY BRAKING triggered by EPB resulting with no hydraulic braking.
In such a scenario EPB controller (being very sophisticated and fail-safe unit) performs EMERGENCY BRAKING via servomotors (as shown in my YT video below).

 

[dnoermann]

it seems that I need an ABS module that is capable of controlling the brakes for Emergency braking

I don't think so
No need to change the ABS.
Emergency breaking is done Manual by pulling the Manual Parking break handle now.
And with EPB you than pull the Switch to have the same result ...

 

[JacobsMess]

Thanks, yes I have an STM32 setup that should be able to do what I need... or possibly an ESP32.

One thing I am unsure of though, it seems that I need an ABS module that is capable of controlling the brakes for Emergency braking, my 2005 T5 has a very basic ABS setup so I suspect this isn't an option unless I retrofit a more modern ABS. Do you have a suggestion on the best way to address this?

I don't think so
No need to change the ABS.
Emergency breaking is done Manual by pulling the Manual Parking break handle now.
And with EPB you than pull the Switch to have the same result ...

Yes it dawned on me last night, whilst the kids were awarding me some midnight thinking time... actually the unit should work, I was thrown by Roberts comment on page 4 or 5 that says the servo motors only handle low speed stopping, but then he later clarifies that they are used as emergency stop as well on page 8 I think

 

[JacobsMess]

One thing I'm not 100% sure on. Why are you buying the EPB Module from alibaba? There was an Audi (8K0907801j) one mentioned by dnoermann, Ebay has them for about £25, seems like a good plentiful option, or are you wanting to buy new units? Are these Audi units known to work?
There is an A6 being broken relatively locally to me so I could go and steal the rear calipers, EPB unit, switch and any associated wiring if they're a viable option for my T5.

 

[dnoermann]

The Audi units speek different CAN Bus Generation and can not be used with T5.2/T6 which speak PQ25
You can buy it since you simulate everything, but than you need canbus dumps from an Audi to see what is what ...

 

[JacobsMess]

The Audi units speek different CAN Bus Generation and can not be used with T5.2/T6 which speak PQ25
You can buy it since you simulate everything, but than you need canbus dumps from an Audi to see what is what ...

Makes sense, I'll look for PQ25 based stuff then as it'll keep things simpler.

 

[jankebnu]

Hi, in the EPB 56D, is it possible to enable the Autohold menu in the Cluster, as well as in the Tiguan 3AA?