Golf mk7: Auto Start/Stop disable switch - who wants to help?

[Talle]

Hi again, yup, its probably a slightly different procedure on the golf, thats why I highlighted that this procedure is for the Audi A6 on a slightly older platform. And yeah, my Audi is behaving exactly as your golf. I have subtracted 4 from adaption channel 34 (it had a value of 20, -4 = new value 16). And now the s/s is off as default during startup (you have a light in the s/s button). And if you want to enable the s/s again during your jurney, just push the button and the light goes out, and s/s is back on. No warnings, no hack, everything works as if you just had pushed the button after start up, exactly like your hardware hack. And I am SURE that there is a procedure like this on the mk7 also. What value do you actually have in adaption channel 34 ? (remember to login first).

[DV52]

Hi again, yup, its probably a slightly different procedure on the golf, thats why I highlighted that this procedure is for the Audi A6 on a slightly older platform. And yeah, my Audi is behaving exactly as your golf. I have subtracted 4 from adaption channel 34 (it had a value of 20, -4 = new value 16). And now the s/s is off as default during startup (you have a light in the s/s button). And if you want to enable the s/s again during your jurney, just push the button and the light goes out, and s/s is back on. No warnings, no hack, everything works as if you just had pushed the button after start up, exactly like your hardware hack. And I am SURE that there is a procedure like this on the mk7 also. What value do you actually have in adaption channel 34 ? (remember to login first).

Talle: Hm... not sure how to say this any other way, but to my knowledge, there is no "channel 34", or anything like this facility on a mk7 -the fundamental structure of adaptation channels is completely different in the car!

The process of adding/subtracting Hexadecimal numbers to/from a single car-wide bank of adaptation channels to change settings for SS simply doesn't apply to MQB platform vehicles. In MQB models, each control module has it's own individual bank of adaptation channels (except of the auto transmission control module at address hex02 - which has no adaptation channels at all).

As I said previously, in total the mk7 will have in excess of 3,000 adaptation channels spread across the 10-20 control modules. Each adaptation channel is specific to it's related control module and some (many?) can only be changed with security access codes that apply to a specific control module. So there is no single security access code for the entire bank of adaption channels (as I suspect that there is in the Audi).

For example, if I search for the term "Start Stop" in the database of adaption channels for my car, I get 22 hits. These SS adaptation channels appear in the BCM, the CAN Gateway, Auto HVAC -Air conditioner, and the Engine control module. So SS is integrally intermeshed into the car's DNA on MQB platform vehicles

It's great that in your Audi, the designers have simplified the control of SS into a single adaptation channel - #34. Alas this does not appear to be the case in the mk7 (or at least, no one has found this to be the case in a mk7 since the cars were first released).

This said (and as indicated in my VCDS tweak instructions to disable SS), later models of the mk7 are fitted with the control module Acc/Start Auth. (address 05, HW:5Q0-959-435). This controller has only one adaptation channel with the descriptor Deactivation of start-stop function and default setting is not active. However, to my knowledge no one has been able to disable SS using by this setting.

Never-say-never, perhaps someone will find a way to replicate your tweak - for now though, I suspect that the Audi solution simply won't work on a mk7, I would be delighted to be proven wrong

Again, many thanks for your interest
Don

[Talle]

This said (and as indicated in my VCDS tweak instructions to disable SS), later models of the mk7 are fitted with the control module Acc/Start Auth. (address 05, HW:5Q0-959-435). This controller has only one adaptation channel with the descriptor Deactivation of start-stop function and default setting is not active. However, to my knowledge no one has been able to disable SS using by this setting.

Yup, the A6 is also equipped with the 05 Acc/star auth. and yes, you will also find s/s system here, and in a bunch of other modules, but it is only in module 09 (with the correct login) you can code it permanently afaik. And again, I am sure that there is a way also on the mk7 platform, but I don't know the procedure for it.

[Volks]

DV52: do you recon this will work for an Audi S1? If you end up selling these let me know!

[DV52]

DV52: do you recon this will work for an Audi S1? If you end up selling these let me know!

Volks: Wow -what an excellent question!! I'm annoyed that I didn't think about how the device might be applied more generally to other vehicles when I was in development phase - I blame this on my failing mental capacity (due in most part to old age and an overindulgence on red wine!)

It's real easy to do this -with at most, only a minor alteration to the circuit. What I tried to do in the mk7 case was minimise the number of connection points between the device and the wiring loom in the car. I was able to use the fact that one side of the SS on/off switch on the centre console of a mk7 was earthed. This meant that could use the earth inside the device for the same purpose thus avoiding one connection point in the wiring loom - hope this makes sense.

In the case of the Audi S1 (a very nice car indeed), I'm not sure if the native SS on/off switch is similarly earthed on one side. Do you know if this is the case? If it is (you may need to refer to a wiring diagram), then the mk7 design should be OK. If the SS on/off switch is not earthed on one side, then the circuit below should work




Hopefully it's evident from the diagram above that that device simply connects in parallel with the SS on/off switch in the car. The only change from the mk7 case is that I have removed the internal earth in the contacts of the micro-relay (it's as easy as that).

With the modified design above, the contacts in the micro relay are entirely independent of (and completely insulated from) any other part of the car's electrical circuits. So the device should be able to be applied regardless of the wiring configuration of the native SS on/off switch in the car (as long as this is a momentary on/off switch). But alas, as with all things in life, this modification comes with a catch - an extra wire needs to be connected to the car's wiring loom (there are 4 x connections with this design- whereas the mk7 design had 3).

As to commercial production of these devices - this may be an option in the future! But since the circuit is so simple, why not make one yourself?
Don

[Volks]

Hi Don, thanks for your informative reply I'm not skilled in electronics and I have only done basic things like strip wires and solder things together but never have I built a circuit from scratch. I did however pull the electrical connector from the switch panel and post some pictures and hopefully you can comment.

[DV52]

Hi Don, thanks for your informative reply I'm not skilled in electronics and I have only done basic things like strip wires and solder things together but never have I built a circuit from scratch. I did however pull the electrical connector from the switch panel and post some pictures and hopefully you can comment.

Volks: I like your enthusiasm. Already pulled the console apart and photographed the switch!!

First impressions are that it looks promising! The connectors in the two cars look "not dissimilar" as the pic below suggests (the mk7 pic comes from post #57 on this thread by AJW:



Cleary the two vehicles use a similar set-up (both use 10 pin connectors which look identical) albeit the physical S1 wiring at the connector appears to be simpler (which is a good thing). But the "acid-test" is what the wiring diagram says! If you can get access to a wiring diagram for an S1 - I am willing to have a look and see if it's at all possible.

Not sure if you already know (my apology if you do), but there's lots of information about Audis on the Erwin site (link below)

https://erwin.audi.com/

A fee applies to use the site, but it's very modest amount (€7.00 for one hour). You will have to register and then you will need to navigate to the section that has the wiring diagrams for your particular model Audi. In their wisdom, the Audi call wiring diagrams "Current flow diagrams" (which kind-of makes sense in a German way!). The site is fairly easy to use and when you find the file that matches your car (type and year of manufacture), you simply down load the PDF file onto your PC - it's that easy!
Don

[Volks]

Thanks Don, I will look into getting a wiring/flow diagram for the Audi S1, you may want to edit your previous post and change A6 to S1 . ErWin dosen't list the S1 so I assume its the same as the A1. If you registered with erWin for the entire day I'm guesing you could download the entire manual?

[ozmale]

Is this project still active ?
Just ordered a new golf 7.5 "R". live in Sydney.
I hate car with this start/stop function, sooner disabled the better.

[DV52]

Is this project still active ?
Just ordered a new golf 7.5 "R". live in Sydney.
I hate car with this start/stop function, sooner disabled the better.

Ozmale: Active? How do you mean? This is a DIY project, so it's as "active" as you want to make it

I've been using mine for many years now and it has never missed a beat! In fact, now I have forgotten all about it - it just operates quietly in the background whenever I switch-on the ignition. I know of a couple of forum colleagues in Europe/UK who have also built the unit - AFAIK, it works OK for them too.


You should be aware that there are alternative methods to disable SS. If you have a diagnostic cable, you could use a VCDS/OBDeleven tweak, or you could buy on of these:



from Kufatec. It's a bit easier to install (it plugs into the OBD port), but it's nowhere near as fun to build and DIY (IMO)

Don

[ozmale]

G,day Don,
I didn't mean "active" in any disrespectful way, its just that the last post was some time ago so wondered if your gadget had somehow over time become redundant.
I am an electronic engineer myself (worked for Telstra for 40 years) but sadly a medical condition prevents me from welding a soldering iron with any accuracy these days.
Thus my next question was if anyone is building your device for sale?
Thanks for the "Kufatec" link, it obviously does the job but there is no real indication from the site if the unit needs to be permanently plugged into the ODB port. This would be undesirable.
I prefer an external solution, thus your device.

Chris

[gregozedobe]

Thanks for the "Kufatec" link, it obviously does the job but there is no real indication from the site if the unit needs to be permanently plugged into the ODB port. This would be undesirable.

From what has been said in other threads on this site, you only need to connect the Kufatec device for a minute or so, and can then remove it entirely. Each time it is connected it toggles auto stop/start from on to off, or from off to on. It can only be used on one car, so no fixing everyone's cars with the one device.

[DV52]

G,day Don,
I didn't mean "active" in any disrespectful way, its just that the last post was some time ago so wondered if your gadget had somehow over time become redundant.
I am an electronic engineer myself (worked for Telstra for 40 years) but sadly a medical condition prevents me from welding a soldering iron with any accuracy these days.
Thus my next question was if anyone is building your device for sale?
Thanks for the "Kufatec" link, it obviously does the job but there is no real indication from the site if the unit needs to be permanently plugged into the ODB port. This would be undesirable.
I prefer an external solution, thus your device.

Chris

Chris: sorry to read about the medical condition. I still have sufficient bits in the junk box to put together another device (I think). If you want to use an auto SS kill switch, PM and we can arrange the details

Don

[Kachingg]

I have the kufatech module and used it on my car with no issues at all easy to use can use it multiple times on the same car (it locks to the 1st car its used on)
You don't need to leave it plugged in to the obd port
Much better imo than soldering stuff into your car!

[ozmale]

Don,

Thanks heaps for the offer to knock one up for me with PM you

Chris