Bimmerpost
3
/
4 Series
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
2019+ BMW 3 AND 4-SERIES FORUMS (G2x Generation) General G20 Sedan / G22 Coupe / G26 Gran Coupe Discussions Auto stop/start no longer working

Post Reply
 
Thread Tools Search this Thread
      02-23-2020, 12:46 PM   #1
StevenDS85
I ///M Fan
Belgium
336
Rep
367
Posts

Drives: BMW 330i M-Sport
Join Date: Apr 2019
Location: Belgium

iTrader: (0)

Auto stop/start no longer working

BIMMERPOST
     Featured on BIMMERPOST.com
I know that a lot of forum members would be happy with my issue, but I want to post it anyway. It looks like my auto stop/start engine function is no longer working. I checked all the parameters but I don’t know why the engine doesn’t stop running when I’ at a traffic light or traffic jam.

- above 10 degrees celsius
- door closed
- seatbelt clicked in
- foot on brake pedal
- in eco pro or comfort driving mode
- engine warm enough
- interior climate on right temperature (or switched off)
- no error messages

Anybody is aware of a known issue before.I.contact my dealer?
Appreciate 0
      02-23-2020, 12:48 PM   #2
gofast182
Captain
614
Rep
766
Posts

Drives: 2020 M340i xDrive
Join Date: Jan 2019
Location: New Jersey

iTrader: (0)

Luckiest G20 owner alive and you want to call the dealer!
__________________
2020 M340i xDrive, Portimao Blue
2019 X5 xDrive 40i, Mineral White
2006 S2000, Berlina Black (Track car)
Appreciate 13
      02-23-2020, 01:40 PM   #3
VipinLJ
Petrolhead
VipinLJ's Avatar
United_States
1937
Rep
3,520
Posts

Drives: ‘20 330i,‘16 X3,‘18 SQ5,‘17 A7
Join Date: Nov 2019
Location: Illinois

iTrader: (2)

How long has it been since it stopped working? How long was this trip?
__________________
Current:
2020 BMW 330i xDrive
2018 Audi SQ5 Prestige
2017 Audi A7 Prestige
Appreciate 0
      02-23-2020, 02:02 PM   #4
TanzaniteBlue
BMWphile
TanzaniteBlue's Avatar
United_States
92
Rep
132
Posts

Drives: BMW & FCA! <3
Join Date: Jun 2014
Location: NY/NJ

iTrader: (0)

You can code it to default to OFF everytime you turn the car on also.
Appreciate 0
      02-23-2020, 03:28 PM   #5
VipinLJ
Petrolhead
VipinLJ's Avatar
United_States
1937
Rep
3,520
Posts

Drives: ‘20 330i,‘16 X3,‘18 SQ5,‘17 A7
Join Date: Nov 2019
Location: Illinois

iTrader: (2)

Quote:
Originally Posted by TanzaniteBlue View Post
You can code it to default to OFF everytime you turn the car on also.
He wants it on
__________________
Current:
2020 BMW 330i xDrive
2018 Audi SQ5 Prestige
2017 Audi A7 Prestige
Appreciate 0
      02-23-2020, 03:37 PM   #6
StevenDS85
I ///M Fan
Belgium
336
Rep
367
Posts

Drives: BMW 330i M-Sport
Join Date: Apr 2019
Location: Belgium

iTrader: (0)

Last time it worked was in December as far as I remember. I do weekly commutes of 150 km, mixed traffic. So must normally work ... And yes, for daily commute I want it on. In weekends I switch to sport where it can stay off.
Appreciate 0
      02-23-2020, 04:46 PM   #7
VipinLJ
Petrolhead
VipinLJ's Avatar
United_States
1937
Rep
3,520
Posts

Drives: ‘20 330i,‘16 X3,‘18 SQ5,‘17 A7
Join Date: Nov 2019
Location: Illinois

iTrader: (2)

Quote:
Originally Posted by StevenDS85 View Post
Last time it worked was in December as far as I remember. I do weekly commutes of 150 km, mixed traffic. So must normally work ... And yes, for daily commute I want it on. In weekends I switch to sport where it can stay off.
So it hasn’t worked since December? Yea then something is definitely wrong. Did you try turning it off and then on again? Does it show a symbol on the dash of an A with a circular cut through it?
Also, is your car stock?
__________________
Current:
2020 BMW 330i xDrive
2018 Audi SQ5 Prestige
2017 Audi A7 Prestige
Appreciate 0
      02-24-2020, 12:29 AM   #8
StevenDS85
I ///M Fan
Belgium
336
Rep
367
Posts

Drives: BMW 330i M-Sport
Join Date: Apr 2019
Location: Belgium

iTrader: (0)

Quote:
Originally Posted by VipinLJ View Post
So it hasn’t worked since December? Yea then something is definitely wrong. Did you try turning it off and then on again? Does it show a symbol on the dash of an A with a circular cut through it?
Also, is your car stock?
Yes, I do get the symbol that auto stop/start on the dash that indicates that the engine will not turn off. No engine modifications or coding at all.
Appreciate 0
      02-24-2020, 12:42 AM   #9
VipinLJ
Petrolhead
VipinLJ's Avatar
United_States
1937
Rep
3,520
Posts

Drives: ‘20 330i,‘16 X3,‘18 SQ5,‘17 A7
Join Date: Nov 2019
Location: Illinois

iTrader: (2)

Quote:
Originally Posted by StevenDS85 View Post
Yes, I do get the symbol that auto stop/start on the dash that indicates that the engine will not turn off. No engine modifications or coding at all.
And your steering is pointing straight when you come to a stop right? I remember reading somewhere that it won't activate if the steering is tilted but I could be wrong.

Edit - Check this link out.
https://f30.bimmerpost.com/forums/sh....php?t=1434770
__________________
Current:
2020 BMW 330i xDrive
2018 Audi SQ5 Prestige
2017 Audi A7 Prestige

Last edited by VipinLJ; 02-24-2020 at 12:54 AM..
Appreciate 0
      02-24-2020, 01:30 AM   #10
blazesquall
Enlisted Member
30
Rep
44
Posts

Drives: G20 m340i, G30 m550i LCI
Join Date: Nov 2019
Location: St. Louis

iTrader: (0)

What does the efficient dynamics page say? It usually gives a reason for why the ASS has started the engine, e.g.
Intention to turn ( left blinker and radar detects no car in front)
Driver request (I tapped brake weird)
Climate request (wants to heat cabin more)
.. I'm betting there are others for charging system faults
Appreciate 1
VipinLJ1936.50
      02-24-2020, 04:02 AM   #11
StevenDS85
I ///M Fan
Belgium
336
Rep
367
Posts

Drives: BMW 330i M-Sport
Join Date: Apr 2019
Location: Belgium

iTrader: (0)

I contacted the dealer this morning and they will have a look on the 6th of March as I do need to visit them anyway for the installation of my M-Performance bumper.
Appreciate 0
      02-24-2020, 04:39 AM   #12
Sussex_G20
First Lieutenant
Sussex_G20's Avatar
United Kingdom
145
Rep
379
Posts

Drives: G20 330i M Sport
Join Date: Jun 2014
Location: South Coast - Eastbourne

iTrader: (0)

I have noticed that the Start Stop requires a certain level of battery charge.
In the winter with lots of short trips or trips where all the electrics are working (heated seats, heated steering wheel, rear window and blowers etc. the efficient dynamics do not seem to keep up with the charging requirements. I have noticed this on most of BMWs since my 435i 2014. I then bought a battery maintainer for when my car sat idle during business trips.

As an example that I have had with my 330i.
A few weeks ago during a cold and wet period I drove to the airport 35 miles with very little braking required on the journey and had heated window, seat heating, wipers, steering wheel all on, and on my arrival to the car park I switched the engine off while I made a call. Warning came on 'battery charge very low please start engine'. I had noticed start stop was not working but put it down to the cold and wet, not producing the correct conditions. 4 days later I came back late at night, luckily car started ok and I got home without further warnings. The next morning I put my battery maintainer on the car, the cycle was very low which usually means little state of charge. Left it for 24 hours and then drove for a short journey and yes Start/Stop was active again.

Me I have coded this out on my last few cars but I really find this version to not be intrusive enough to bother, definitely an improvement on versions before.
Appreciate 0
      02-24-2020, 04:47 AM   #13
StevenDS85
I ///M Fan
Belgium
336
Rep
367
Posts

Drives: BMW 330i M-Sport
Join Date: Apr 2019
Location: Belgium

iTrader: (0)

Thanks for your valuable post Sussex_G20. My guess is indeed a lower battery level. I do a lot of motorway journeys without much braking and with all electric systems on. No indication on low battery level, but let the dealership confirm this.
Appreciate 0
      02-24-2020, 11:04 AM   #14
VipinLJ
Petrolhead
VipinLJ's Avatar
United_States
1937
Rep
3,520
Posts

Drives: ‘20 330i,‘16 X3,‘18 SQ5,‘17 A7
Join Date: Nov 2019
Location: Illinois

iTrader: (2)

I thought battery discharged faster when you drive slow in stop and go traffic or similar compared to when you’re cruising on the motorway?
__________________
Current:
2020 BMW 330i xDrive
2018 Audi SQ5 Prestige
2017 Audi A7 Prestige
Appreciate 0
      02-24-2020, 11:11 AM   #15
AP
Major General
AP's Avatar
2702
Rep
5,020
Posts

Drives: G30 M550
Join Date: Apr 2011
Location: UK

iTrader: (0)

Think of the alternator as a smart alternator and if the battery is on the low side then it will charge as necessary to get it back to a decent level, regardless of the type of driving this as opposed to just charging when you have taken your foot off the gas.
Appreciate 1
VipinLJ1936.50
      02-24-2020, 02:08 PM   #16
HighlandPete
Lieutenant General
6659
Rep
15,858
Posts

Drives: BMW F11 535i Touring
Join Date: Mar 2007
Location: Scotland, Highland Region

iTrader: (0)

Quote:
Originally Posted by AP View Post
Think of the alternator as a smart alternator and if the battery is on the low side then it will charge as necessary to get it back to a decent level, regardless of the type of driving this as opposed to just charging when you have taken your foot off the gas.
Problem is, energy management works in different states (or levels) according to the SoC. How I see it, get a driving profile which sits in the wrong place to sustain a decent SoC and that's where users get the issues.

Battery has quite a low SoC for the charging system to take on a 'conventional' mode. Even then, it only brings the battery back up to a certain SoC, then reverts back to intelligent alternator control, with specific charging parameters.
Appreciate 0
      02-25-2020, 12:37 AM   #17
Sussex_G20
First Lieutenant
Sussex_G20's Avatar
United Kingdom
145
Rep
379
Posts

Drives: G20 330i M Sport
Join Date: Jun 2014
Location: South Coast - Eastbourne

iTrader: (0)

Quote:
Originally Posted by HighlandPete View Post
Problem is, energy management works in different states (or levels) according to the SoC. How I see it, get a driving profile which sits in the wrong place to sustain a decent SoC and that's where users get the issues.

Battery has quite a low SoC for the charging system to take on a 'conventional' mode. Even then, it only brings the battery back up to a certain SoC, then reverts back to intelligent alternator control, with specific charging parameters.
Exactly my experience, it does not seem to be as simple as AP describes. In my instance a few weeks back a 35 mile drive back home in the dark on fast roads should have seen my battery charge fully restored. But sadly this was not the case
Appreciate 0
      03-06-2020, 10:00 AM   #18
StevenDS85
I ///M Fan
Belgium
336
Rep
367
Posts

Drives: BMW 330i M-Sport
Join Date: Apr 2019
Location: Belgium

iTrader: (0)

Went to the dealer today and they confirmed the battery is on the low level. One of the causes can be that I do drive most often in ecopro mode. The advice is to drive more in different modes. On the 3th of April my car has to go in for the 03/2020 Idrive 7 software update (and a recall action). Let’s see If I’m able to charge the battery more by then.
Appreciate 0
      03-06-2020, 11:29 AM   #19
SteveinArizona
Brigadier General
United_States
3086
Rep
4,210
Posts

Drives: BMW 530e
Join Date: Jul 2016
Location: Greater Phoenix

iTrader: (0)

Quote:
Originally Posted by gofast182 View Post
Luckiest G20 owner alive and you want to call the dealer!
Appreciate 0
      03-09-2020, 05:21 AM   #20
Skeewiff03
Private First Class
Cyprus
38
Rep
162
Posts

Drives: BMW 320i (G20)
Join Date: Mar 2019
Location: Cyprus

iTrader: (0)

Quote:
Originally Posted by StevenDS85 View Post
Went to the dealer today and they confirmed the battery is on the low level. One of the causes can be that I do drive most often in ecopro mode. The advice is to drive more in different modes. On the 3th of April my car has to go in for the 03/2020 Idrive 7 software update (and a recall action). Let’s see If I’m able to charge the battery more by then.
I am on the same as you, even though I drive mostly in Comfort.
Went car went in for SW update, the dealer charged the battery and ASS worked fine for the next day; and then went off again...
Now, I have come to live with the fact that their system is not as intelligent as it should be
Appreciate 0
      03-09-2020, 06:52 AM   #21
HighlandPete
Lieutenant General
6659
Rep
15,858
Posts

Drives: BMW F11 535i Touring
Join Date: Mar 2007
Location: Scotland, Highland Region

iTrader: (0)

Quote:
Originally Posted by Skeewiff03 View Post
I am on the same as you, even though I drive mostly in Comfort.
Went car went in for SW update, the dealer charged the battery and ASS worked fine for the next day; and then went off again...
Now, I have come to live with the fact that their system is not as intelligent as it should be
You could look at it another way.

It is intelligent enough to switch off the stop-start function, as your driving profile doesn't give the battery enough charge, and/or your energy demands are high.

The fact it keeps the engine running means more charge time and lessens demand on the battery.
Appreciate 0
      03-09-2020, 06:58 AM   #22
Skeewiff03
Private First Class
Cyprus
38
Rep
162
Posts

Drives: BMW 320i (G20)
Join Date: Mar 2019
Location: Cyprus

iTrader: (0)

Quote:
Originally Posted by HighlandPete View Post
You could look at it another way.

It is intelligent enough to switch off the stop-start function, as your driving profile doesn't give the battery enough charge, and/or your energy demands are high.

The fact it keeps the engine running means more charge time and lessens demand on the battery.
Well, I do not have heated steering/seats, I do no use the A/C (other than defogging windows on rare occasions) and ASS stopped working 2 weeks after delivery and has worked only twice since then.
I am not an expert on the system's details but a 'smarter' system would see that its level is low (maybe no instantly but tracked over a period) and would (saying) couple the engine more to charge battery
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 07:48 AM.




g20
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST