Stop/Start and Regen algorithms?

[MrTango]

Hi folks,
I'd like to know the algorithm for the Stop/Start feature and the Regen. My Stop/Start is so random I can't work out why it seldom cuts in.
It also regens 3 or 4 times per tank. It would be nice to know why.
Can anyone shed some light please?
T6 2016 140 DSG camper conversion with solar panel and CTEK split charger.
Thanks.

 

[Dellmassive]

have a look here:

Stop/start...regen...smart Alternator... Dc-dc Charger For Leisure Battery Or Not?

So With all the talk regarding the Bluemotion thing and regen breaking and leisure batteries our T6 has finally arrived. The first thing we done was to checkout the factory fitted setup,...... Stop/start=check, Regen Braking=check, AGM starter battery=check leisure battery under passenger...

www.t6forum.com

and here:

DPF Regen, Yellow Light & Adblue - Whats It All About? -

DPF Regen, Yellow light & AdBlue - Whats it all about? - The DFP light is becoming a more apparent issue with modern diesel vans, unfortunately, it’s a fact of modern diesel life. what is a DPF? Diesel particulate filters (DPF) are very effective in cutting emissions, trapping even the...

www.t6forum.com

all the rest here - Dellmassive’s "How I Done It" blogs.


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[Dellmassive]

oh , , ,

here too:

Stop/start Doing Your Head In? Disabling It - How We Done It -

Stop/Start doing your head in? Disabling it - How We done It - The start/stop is an interesting topic, some love it - some hate it. The thing is, its a requirement of the T6 EU6 licence as it is used for the consumption figures and especially the CO2 emissions for the registration...

www.t6forum.com

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[mmi]

T6 TPI - Start-stop System Fails Intermittently, Engine Does Not Switch Off Or On -

Being a T6 geek and spending my Sunday afternoon trawling through T6 TPI`s and Service info i thought i would share this with you. stop/start is a very complex system even though you would assume its simple. An interesting read IMO and details the stop/start requirements and issues/non-fault...

www.t6forum.com

SSP 426 - Start/Stop System 2009

VW Self Study Programme, Document 426 - Start/Stop System 2009 Rising fuel prices and stricter emissions laws have made it necessary for us to look for ways to save energy and reduce exhaust gas emissions in vehicles. With this in mind, a...

www.t6forum.com

 

[MrTango]

Bigs thanks all. Some reading material for later.

 

[MrTango]

After a good read, thank you so much for the data, great work by the way, I had a look at my battery, seems like a good place to start as it has an effect on the DPF regen and Start/Stop.
Checking the 12v socket in the van, it was 12.1v at rest and 13.8v when running, was 14.8v at initial start up then dropped to 13.8v constant.
A couple of questions,
1 Is it time for a new battery?
2 Do I need to get the new battery 'coded' in?
3 Is it worth me getting the latest firmware flashed into the ECU?

Thanks again.

 

[Dellmassive]

Standard battery life is 3 to 5 years.

Can can get a tester that shows you the health of the battery.

Or vcds will also show you what the van thinks of the battery.

Post a few pics of the battery.

You have a 2016 van.... Is it the original battery?

 

[MrTango]

Thanks Dellmassive.
Here's the battery.




Confession time. I have fitted a D250SE wired to another battery. Varta E11 12v 74 Ah. However, I was double checking the wiring and I had connected the battery select cable black wire to ground, for an AGM battery, which the E11 is not.

 

[Dellmassive]

Looks like an original battery to me.?

Could be worth getting it tested at a local place.


Dare I mention Halfords for a quick battery test?....if you do ask for a copy of the print out.

Or take a pic of the tester screen.

 

[MrTango]

I tried this, best I have until the weekend. It didn't seem to want to charge it.

 

[MrTango]

Hmm, I attached the charger, it started 25% flashing red, then went through 50 and 75 ending green at 100%. Then it started back at the 25% flashing red again. Repeats the cycle.

 

[Dellmassive]

if the battery SOH (State of health) is bad ie - less than 50% then it will show as charged very quickly.

but then die quick.

you need a tester like this to tes the health of a SLA battery.

https://amzn.to/3iujz21

About this item​

• ✔ ANCEL BST200 12V car battery tester shows you the basic battery parameters such as voltage, internal resistance, battery condition and charge status. In addition, ANCEL BST200 also tells you whether you should replace or charge the battery.
• ✔ Works with 12V lead acid batteries from 100 - 1100 CCA, including regular flood batteries, AGM flat plate batteries, AGM spiral batteries and GEL for cars, RVs, SUVs, motorcycles, boats, light trucks and even golf carts.
• ✔ Gives you an accurate result in just seconds, such as CCA value, CCA rating, voltage, internal resistance, health and state of charge, based on the rating standard of CCA, CA, MCA, JIS, DIN, IEC, EN and SAE.
• ✔ With the two test models "OUT OF VEHICLE" and "IN VEHICLE", you can test the battery both inside and outside the vehicle and get even more accurate test data. Plus, you do not need an internal battery and get power directly from the detected battery.
• ✔ The device is equipped with reverse polarity protection and will not emit light, heat or sparks and will not discharge the battery. Safe for you, your cars, your batteries and the tester itself. Built-in 10 operating languages.

 

[MrTango]

I'll ask if I'm allowed one....

 

[Dellmassive]

more info:

Replacing LB Battery - what Ah & spec AGM?

Sorry:rolleyes:, van info would of been useful...2016 T32 102ps HL, stop/start but no Adblue...or do I need to check under the bonnet?

www.t6forum.com

Flat battery?

I have just been out to start the van, flat battery. I noticed yesterday that the interior lights did not stay on when the door was opened, as they would normally do,& then fade out after approx 30 seconds after the door was shut, they just went out after approx 30 seconds, no fade out as...

www.t6forum.com

Leisure Battery - Is it faulty? BM2

Hi all, I use BM2 to monitor my starter and my leisure battery (2 seperate BM2s). I checked the starter battery the day after we'd had a 1 night camping trip and it showed 7% - almost flat!! Which is odd as the battery is less than a year old and clearly we had driven home from the camping...

www.t6forum.com

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[Dellmassive]

Hmm, I attached the charger, it started 25% flashing red, then went through 50 and 75 ending green at 100%. Then it started back at the 25% flashing red again. Repeats the cycle.

sounds to me like the battery SOH is bad.


could be time for a new one.

 

[MrTango]

If I get a new battery, do I need it coding in?

 

[Dellmassive]

Yes.no.maybe.definatly.

you can fit a new battery and it will work straight away.

The van will adapt over the next 10 drive cycles.

But the SOH logged in the vans ECU will need resetting by coding a new battery at some point.

So.

You can get a battery fitted at a place that will code van for you.

Or fit your own battery and get obd11 or other to code..... Or give someone on here beer tokens to code in for you.

 

[MrTango]

Apologies, just read the links. I will get a Carista as I want to sort some other things as well.

 

[Dellmassive]

I'm not sure if carista can code battery...

Maybe it can now?

 

[airhoguk]

Carista can now code the battery according to their website