If you have a Friend who knows a bit Electronics, he can help you Build a minimal EPB Controller based on the safety prizipals Robert shared (Mostly some Relais and some passive Parts will do the Job i think.
So, long time no update.
It looks like with retrofitting 56D EPB from Passat NMS is not bringing us "Keep Car stopped after doing FTS"
For this feature the Autohold Feature of ABS is needed.
And T6 MK100 ABS does not support Autohold.
Two possible ways to go on:
1. Patch MK100 Firmware to support Autohold
2. Install Sharan ABS, which does support EPB and Autohold, it is a TRW460
- 1. Is the preferable way, ABS and in special ESP is safety related to the CAR, Vehicle Mass, Middle Point of Mass, all Variables are T6 relevant, Sharan is near to T6 but still not the same, so ESP will be worser with Sharan ABS ....
- But 2. is still the more easier way, only needs to change ABS, Electric Wiring, Hydrolic Wiring, Coding, patching VIN to match Sharan and ...
It looks like with retrofitting 56D EPB from Passat NMS is not bringing us "Keep Car stopped after doing FTS"
For this feature the Autohold Feature of ABS is needed.
And T6 MK100 ABS does not support Autohold.
Two possible ways to go on:
1. Patch MK100 Firmware to support Autohold
2. Install Sharan ABS, which does support EPB and Autohold, it is a TRW460
- 1. Is the preferable way, ABS and in special ESP is safety related to the CAR, Vehicle Mass, Middle Point of Mass, all Variables are T6 relevant, Sharan is near to T6 but still not the same, so ESP will be worser with Sharan ABS ....
- But 2. is still the more easier way, only needs to change ABS, Electric Wiring, Hydrolic Wiring, Coding, patching VIN to match Sharan and ...
So with ACC and DSG in the T6 we have the FollowToStop capability.
But i wont more, i wont to have "Stop and Go" like it is available in the VW Sharan PQ35 which is very likely like the T6 which is PQ25.
Needles to say we need Auto-Hold and EPB to get Stop & Go capability.
T6 ABS is a complete different one than the one in Sharan.
But changing to Sharan ABS is no good idea because the internal Settings for ESP which are cricial relevant for safety, from the Sharan for shure are no fit for the T6.
So we need to get EPB added and get Authold enabled in ABS.
I have no clue if that is possible, but i started.
Elektronic part of EPB is working, together with an EPB Aktor simulation.
EPB is Number 53, which is not possible to enable in T6 Gateway, but still you can install it on Engine Can-Bus and it works.
Than you can enable EPB in ACC Coding without getting an error about missing EPB.
In DSG you can see that EPB now talks to DSG, no error, too.
Electricaly it looks good, no errors.
I did two Videos to show the very little difference in Car behaviour when doing FTS now.
The one available standalone EPB is the one from Passat B6/B7, 3AA907901H
but that one uses an additional communication-line to ABS, which we don't have, so that one i was not able to get running.
You need EPB Controller together with its switch from the PQ35 Passat NMS China
- 56D907801A
- 56D927225
Mechanical Part is now the Question:
Audi A4/S4 rear Brake with 300x22mm Disk is probably a good fit for the T6 294x22mm Disks
Part numbers:8W0615404and8W0615403
Need to check how this can be mounted on the T6 ...
Getting AutoHold enabled in the T6 Mk100 ABS is the next probably impossible task to accomplish ....
Adding some Pictures of the flying EPB Setup and Simulation of EPB Motors behind the Driver seat.
Autoscan: 53 is manually scanned and added @ the end.
View attachment 92880
View attachment 92881
@dnoermann , can you please describe the test setup here?
I can see two power resistors providing constant load in both directions.
What is parallel to them? I am guessing a series diode and then transistor delay switch which switches additional load resistors?
Can you please provide the component values?
This might be a solution for you.
Electric parking brake controller, EPB Installation Kit
Electric parking brake controller is designed to operate Tesla Brembo and Tesla Model 3 parking brake calipers. Push button or hand brake lever operation, especially for electric cars and EV
I use some IRF224N N Channel Mosfet as Switch, which slowly switches on to simulate the Max High Current when EPB is Closed
In Series is 2x 0.62 Ohm 5 Watt Resistor, so that when Fully Closed minimal Resistance is 1,24 Ohm.
A simple 10k R is Loading a 2200µf Elko connected to the Gate, to slowly enable it
A 20A Diode in Series was needed, too, so that it only works when Closing EPB.
Thank you for the explanation. Are the values critical? Did it take you long to figure correct values?
I was thinking about replacing the delay switch with inrush current limiter (NTC resistor).
Do you think that would work?
I have bought all the above electronic components, can you tell me how to connect the wiring? How does k237 light up? How does autohold turn on? Thank you very much
I want to make it happen
1. Ignition is being switched OFF.
2. Ignition ON and drivers door is opened.
3. Ignition ON and drivers seat belt is unfastened.
Job's done. I have successfully emulated EPB with working autohold.
esp32-can/src/main.cpp at epb · danielkucera/esp32-can
Contribute to danielkucera/esp32-can development by creating an account on GitHub.
github.com
P.S.: I have 56D module plus the 7N0 switch spare
Whilst looking at Hill Decent Assist I found this Hill Decent Assist, Retrofit to a 2011 4Motion Transporter which suggests that for a T6 with ESP/ABS its wire in the button and make a coding change.Job's done. I have successfully emulated EPB with working autohold.
esp32-can/src/main.cpp at epb · danielkucera/esp32-can
Contribute to danielkucera/esp32-can development by creating an account on GitHub.
P.S.: I have 56D module plus the 7N0 switch spare
Would your ESP32 code turn that into autohold?
andreimercas
New Member
Job's done. I have successfully emulated EPB with working autohold.
esp32-can/src/main.cpp at epb · danielkucera/esp32-can
Contribute to danielkucera/esp32-can development by creating an account on GitHub.
P.S.: I have 56D module plus the 7N0 switch spare
can you tell me more about how you managed with epb and autohold?
andreimercas
New Member
you can tell us more about how you did it (emulated EPB with working autohold.)Job's done. I have successfully emulated EPB with working autohold.
esp32-can/src/main.cpp at epb · danielkucera/esp32-can
Contribute to danielkucera/esp32-can development by creating an account on GitHub.
P.S.: I have 56D module plus the 7N0 switch spare
I have a golf V at which I try to do EPB. It would help me a lot if I could do epb without the module on the Chinese passat
just ask yourself when you want to Auto Hold function , what conditions is need to apply "auto hold"
It's quite simple, the device I use (ESP32 with CAN interface) is simply sending the same message, that would a 56D module send.
This allows you to code "EPB present" in ABS which in turn enables autohold. The autohold function is performed by ABS but it will not enable without "functional" EPB.
ABS will hold the brakes in autohold only for 3 minutes, after that it calls EPB to engage. The trick to overcome this I use is, that I show a yellow warning "press brake pedal" icon on cluster before the limit expires. After you press the pedal, EPB will pretend it got engaged, autohold will turn off, then EPB will disengage and autohold enabled again and you can release the pedal. This will reset the time limit. If you don't do it in time, the car will start to move.
For the ambitious T6/t5 retrofitters.
danman is using a car which does have an ABS that supports Autohold ...
probably no T6For the T6 we first need to patch ABS to support Autohold ....
Already working on it
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