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Thread: Auto Hold function on MQB platform

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    Verified VCDS User andyvee's Avatar
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    Auto Hold function on MQB platform

    Hi experts at Ross-Tech

    The Golf VII is available with auto hold, the one where when you come to a stop it maintains brake pressure via the ABS unit after you release the footbrake, until you accelerate again. (Not HHC).

    As I understand it, if you have ACC this means it will hold you indefinitely on with ACC in traffic.

    So is it possible to enable this on other MQB platform (Octavia 3 etc.)?

    I would assume you need the correct ABS module and there would be some wiring to do for the switch as well?

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    Anyone know? If the golf uses the ABS module and not the EBP for this feature then we should be able to enable it (as long as the module supports this feature)

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    Quote Originally Posted by Xpower View Post
    Anyone know? If the golf uses the ABS module and not the EBP for this feature then we should be able to enable it (as long as the module supports this feature)
    Xpower: Good morning - first I'm not an expert, just a sub-100 IQ bloke with a dangerously minor understanding of Mr Ross's cables - but that's a very interesting project, I hope that you are successful. As to your question, isn't ACC fitted to MQB vehicles in USA many (most?) of which don't have EPB?

    According to SSP #374-Traction Control and Assist Systems:
    "Brake intervention [for ACC] is implemented via the hydraulic unit with return flow pump. In the hydraulic unit, the switch valve is closed and the high-pressure valve is opened. The return flow pump is actuated and begins pumping. As a result of this, the pressure at the wheel brake is built up."
    And according to SSP #516 - The Golf 2013 Driver Assist Systems:
    " [for ACC] Vehicles with a manual gearbox are automatically accelerated or decelerated to the preferred speed. The system is automatically deactivated at speeds below 20 km/h and the driver is prompted to take charge by visual and acoustic signals."
    and
    "Vehicles with a dual clutch gearbox (DSG) can be decelerated down to a standstill, depending on the situation, and started automatically."

    Don

    Edit: I've just had a quick look at the WD for J428 (the ACC control module fitted to the front bumper). There doesn't appear to be any physical wiring to the ABS - which suggests (I'm guessing) that communications between the two modules happens over the CAN Gateway-I think! The point being that you will need to make sure that the ABS module on the Ocky-3 is capable of understanding the ACC's language and also that it is capable of providing the necessary "hand-shaking" messages. Someone else here who is more knowledgeable might make a comment

    Edit2: Yep, I believe that my hunch above was correct! Here's a picture of the PIN_OUT for J428. Notice the absence of any reference to connections vaguely resembling ABS -all dialogue must happen on the CAN bus as digital nomenclature (not analogue)! Also, my understanding is that the front camera connections are not connected in many instances


    Last edited by DV52; 02-01-2016 at 07:22 PM.
    VW Golf MkVII (103TSI) my13

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    Verified VCDS User Mrclopec's Avatar
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    Look in your trunk for your PR sticker. Youre looking for PR code 1AT. If you see 1AS, then you cant do it. I would assume that if you have ACC, then your ABS is 1AT. It would just be a matter of retrofitting the switch, 2 wires from the switch to the ABS unit in the engine compartment, and some coding.
    I retrofit not because I settled for a car that didn't have everything. I retrofit for the challenge!

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    Verified VCDS User Gizmo's Avatar
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    Andy on the Superb 3 there are also an extra couple of (brake??) lines going to each calliper, I assume this has something to do with the Auto Hold?
    Does the Octavia have them?

    I didn’t look too deep into them as it was cold and getting dark when I fitted the winter wheels!

    FWIW:

    Address 03: ABS Brakes (J104) Labels: 5Q0-907-379-IPB-V1.clb
    Part No SW: 3Q0 907 379 AB HW: 3Q0 907 379 G
    Component: ESC H42 0723
    Revision: 00000000 Serial number: 62725000002243
    Coding: 1D07929C34220B750780060141CB49B8492CD0E0608292F538 61F0F8C2A9
    Shop #: WSC 33361 790 00063
    ASAM Dataset: EV_Brake1UDSContiMK100IPB 034036
    ROD: EV_Brake1UDSContiMK100IPB_SK37.rod
    VCID: 7AF0471FFD8940EE3F-802E


    No fault code found.
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    Verified VCDS User rojas's Avatar
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    Quote Originally Posted by Mrclopec View Post
    2 wires from the switch to the ABS unit in the engine compartment, and some coding.

    2 wires? where ? ...

    I think you just have to be equipped swich ACC ( 5Q0953513 AG ), check the ABS control unit to see if it is compatible ( IPB = ok , ESP = not correct para ACC ) , x2 rear abs sensor : (WHT003864A) , but you need code activation swaap

    think it is , true ?

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    I'll check my sticker. I do have ACC & DSG and it does bring the vehicle to a complete standstill but will only hold it for a few seconds. I would like it to hold it indefinitely until the traffic begins moving.
    It's a pain to have to keep your foot on the brake pedal (and annoy the person behind you with the brake lights).
    I drove a 2015 passat not long ago without ACC and it worked exactly like this. You brought the vehicle to a stop, and it held it there for you allowing you to take your foot of the brakes - all in D.
    When your ready, tap the accelerator and the brakes release, clutch engages and your off.

    Also I am looking for the security codes login codes for NEW MY16.5 instruments (it's not 20103), and access codes for the ABS (that actually allow you to make changes to the auto hold section)
    So far no luck :-(

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    Verified VCDS User Gizmo's Avatar
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    Quote Originally Posted by Xpower View Post
    It's a pain to have to keep your foot on the brake pedal (and annoy the person behind you with the brake lights).
    On the Superb at least the brake lights are always lit whilst auto hold is doing its stuff, ideally I would like to code this so they go out after a couple of seconds rather than having to put the (electric) handbrake on just to turn the brake lights off.
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    It would seem that this should be quite simple, there are 2 channels in the ABS module. 1 I can change the other a security code is required. Both are set to not active by default. The first one below is to set when it is on, options are never, always, and basically what ever the switch says (which the Octavia doesn't have) and may not need if it's set to always active like I have done below.





    All I need now is the security code, I have tried all the ones available and most are accepted, unfortunately non of them will allow this change to be made. Help :-(

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    Verified VCDS User Gizmo's Avatar
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    What codes have you tried?

    I have tried the following which were all accepted under 03, but without success to change the ‘drivers door status’:

    11966
    15081
    20103
    24435
    25004
    31857
    37202
    40168

    These were all rejected:
    10505
    18573
    28183
    44595

    31347 was also tried but can’t remember if it was accepted or not but was no good for the adaptation I needed.
    Last edited by Gizmo; 02-07-2016 at 12:56 PM. Reason: missed code
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