[Joe-BMW33]

I coded out ASS to remember my last setting, which is of course off.

On moving the lever to the left, I use this all the time for a quick way to get into sport mode. I find it much easier than hitting the mode buttons. Mind you, this only puts the engine and tranny in Sport mode, not the steering or suspension. Great for a quick way to be in Comfort and want to pass someone quickly.

[oldtexasdog]

Originally Posted by WinoGregorio

Does anyone else have an overly aggressive Auto Stop/Start system? Mine will kill the engine while the car is still rolling up to 3MPH. This is extremely frustrating when trying to creep into a parking spot. As the engine dies, the car lurches to a stop as there is no more engine torque pushing it forward. Natural inclination is to release brake making the engine fire right back up causing the car to lurch forward because there is no longer enough brake force to restrain it. Obviously, pulling the gear selector over to S or pressing the defeat button will prevent this ugliness but that is a big ask of anyone else driving the car like my wife.

Complained several times and finally the dealer opened a TSARA case. They checked the onboard FASTA data and found nothing but they still authorized reprogramming with newer software. Still no change in operation. The dealer then used ISTA to calibrate all DSC sensors and throttle bodies.

They claim victory but I am not convinced there is any improvement. The only real noticeable change is that the engine lost its roar on startup. It sounds like an anemic 4 cylinder instead of a performance V8 when you press the start button. That helps the lurch forward a little but nothing else.

I see it looks like you have a 2020 M550i XDrive/ I do also. On mine there is a small toggle just below the start stop button that you can push to engage and it turns off the start stop function. You do have to remember to do it every time you start the car but no big deal just start and the push it as it is right there under the start button.

[Joe-BMW33]

Originally Posted by oldtexasdog

I see it looks like you have a 2020 M550i XDrive/ I do also. On mine there is a small toggle just below the start stop button that you can push to engage and it turns off the start stop function. You do have to remember to do it every time you start the car but no big deal just start and the push it as it is right there under the start button.

Or you can use Bimmercode to have the car remember the setting you last used with the button and never have to push it again.

[NGT2]

Originally Posted by Joe-BMW33

I coded out ASS to remember my last setting, which is of course off.

On moving the lever to the left, I use this all the time for a quick way to get into sport mode. I find it much easier than hitting the mode buttons. Mind you, this only puts the engine and tranny in Sport mode, not the steering or suspension. Great for a quick way to be in Comfort and want to pass someone quickly.

I don’t even know if I can code it out of the X7. It doesn’t have an on/off button like the G30 does. Since we never use sport mode on that vehicle, I set all the Sport Indiv settings to “comfort” and I just use that every time. Sport mode doesn’t use ASS. That’s an aside to this conversation, but loosely related. It’s a work around, if you don’t mind turning Sport Indiv into a milder setting.

[Joe-BMW33]

Originally Posted by NGT2

I don’t even know if I can code it out of the X7. It doesn’t have an on/off button like the G30 does. Since we never use sport mode on that vehicle, I set all the Sport Indiv settings to “comfort” and I just use that every time. Sport mode doesn’t use ASS. That’s an aside to this conversation, but loosely related. It’s a work around, if you don’t mind turning Sport Indiv into a milder setting.

Correct, if you don’t have the start stop button to deactivate it, you can’t code it out, unfortunately. You can code the car to start in a different mode other than Comfort which kills it. Including setting an individual mode that basically copied Comfort if you still want comfort mode.

[fooliojp]

How does a G30/G31 decide if it's going to stop-start?

When commuting into work (15-20 minute drive @ 60-70 mph - dual carriage way) I assume the car would be in a state where the stop-start would come into affect, however it doesn't always. Does this mean my battery is low or in poor condition?

Thanks in advance

[spiderman1982]

Why does the on off button stay off for 3-5 start stop cycles? It is not consistent, but I am glad that I don't have to turn it off every time that I have to start up the car. These should be manufactured so that you push a button and it deactivates this annoying feature until you push it to activate it.

[AP]

Have a look in the manual. There is about a dozen reasons why stop start will not kick in.
Low battery is one of them.
Others that come to mind are
Cabin not at desired temp
Steering wheel turned
Engine not warmed up
In sport mode

[Joe-BMW33]

Originally Posted by fooliojp

How does a G30/G31 decide if it's going to stop-start?

When commuting into work (15-20 minute drive @ 60-70 mph - dual carriage way) I assume the car would be in a state where the stop-start would come into affect, however it doesn't always. Does this mean my battery is low or in poor condition?

Thanks in advance

Auto Stop Start is for cars with ICE and only kills the engine when stopped and starts again when you move. This is not what you are thinking which is more of what hybrids do.

[fooliojp]

Originally Posted by Joe-BMW33

Auto Stop Start is for cars with ICE and only kills the engine when stopped and starts again when you move. This is not what you are thinking which is more of what hybrids do.

I expected the car to stop-start whenever the car comes to a stop. At least this was how my F31 was behaving before. It could be due to the battery as mentioned by AP or any number of other conditions. However there are no signs of the battery being in a poor state. I could try and charge up the battery this weekend and see if this makes any difference. The car is being used for my daily commute and weekend taxi service... (boys play football and rugby).

[fooliojp]

Originally Posted by AP

Have a look in the manual. There is about a dozen reasons why stop start will not kick in.
Low battery is one of them.
Others that come to mind are
Cabin not at desired temp
Steering wheel turned
Engine not warmed up
In sport mode

Thanks I'll dig it out this weekend. Seems like a wide range of reasons for it not to activate.

[LogicalApex]

Originally Posted by fooliojp

I expected the car to stop-start whenever the car comes to a stop. At least this was how my F31 was behaving before. It could be due to the battery as mentioned by AP or any number of other conditions. However there are no signs of the battery being in a poor state. I could try and charge up the battery this weekend and see if this makes any difference. The car is being used for my daily commute and weekend taxi service... (boys play football and rugby).

It may have already been discussed, but keep in mind the battery for the Auto-Start-Stop functionality is the auxiliary battery, not the main battery. If that’s weak or dead it won’t activate.

[fooliojp]

Originally Posted by LogicalApex

It may have already been discussed, but keep in mind the battery for the Auto-Start-Stop functionality is the auxiliary battery, not the main battery. If that’s weak or dead it won’t activate.

I did not know this... But found this posting

https://g30.bimmerpost.com/forums/sh...3&postcount=26

I thought the G6 battery is the car battery - located below the rear boot fuse box.
G1 is the main car battery - under the car boot floor.

Looks like you're not supposed to charge the G6 auxiliary battery.

[adhrp]

Originally Posted by NGT2

I don’t even know if I can code it out of the X7. It doesn’t have an on/off button like the G30 does. Since we never use sport mode on that vehicle, I set all the Sport Indiv settings to “comfort” and I just use that every time. Sport mode doesn’t use ASS. That’s an aside to this conversation, but loosely related. It’s a work around, if you don’t mind turning Sport Indiv into a milder setting.

The difference is your X7 has the B58 with mild hybrid and the electric system is used for the start/stop which (I remember reading somewhere) is more efficient and less stressful (apparently) than full ICE. If I had the 48V electric motor, I would have no issue with the start stop system. On the ICE, I don't want it stopping/starting every hundred feet.

[NGT2]

Originally Posted by adhrp

The difference is your X7 has the B58 with mild hybrid and the electric system is used for the start/stop which (I remember reading somewhere) is more efficient and less stressful (apparently) than full ICE. If I had the 48V electric motor, I would have no issue with the start stop system. On the ICE, I don't want it stopping/starting every hundred feet.

It is a much smoother system than in the 2018 540

[Qsilver7]

Originally Posted by fooliojp

How does a G30/G31 decide if it's going to stop-start?

When commuting into work (15-20 minute drive @ 60-70 mph - dual carriage way) I assume the car would be in a state where the stop-start would come into affect, however it doesn't always. Does this mean my battery is low or in poor condition?

Thanks in advance

Switch-off inhibitors(some examples)

The engine continues running although the vehicle is at standstill and held with the brake pedal.

The following preconditions act as switch-off inhibitors and prevent the engine from shutting down:

• Engine adaptation (e.g. cylinder adjustment)
• Regeneration of the diesel particulate filter
• Carbon canister needs purging
• Insufficient knock resistance of fuel
• Engine fault
• Engine coolant temperature
  • below a defined value (depending on engine version approx. 20 ‐ 60 °C)
  • above a defined value (depending on engine version approx. 100 ‐ 130 °C)
• Automatic transmission not ready
• Gearbox adaptation active
• Drive position “S”, “M”, “N”, “R”
• Driving surface incline too great
• Assist system active (Active Cruise Control, Parking Assist, Hill Descent Control)
• Stop-and-go driving
• Last MSA stop was too long
• Air conditioning requirements:
  • MAX AC button pressed
  • Defrost button pressed (request to defrost the windscreen)
  • high blower speed and low blower temperature, compressor button pressed
  • high blower speed and air distribution directed to windscreen, compressor actuated
• Ambient temperature ≤ 3 °C
• Engine speed > 1200 rpm
• Battery condition:
  • State of charge too low
  • Measured battery state of charge not plausible
  • Battery temperature too high (approx. 50 °C)
  • Starting voltage drop from previous ASSF start too low
• Vehicle rolling

[fooliojp]

Originally Posted by Qsilver7

Switch-off inhibitors(some examples)

The engine continues running although the vehicle is at standstill and held with the brake pedal.

The following preconditions act as switch-off inhibitors and prevent the engine from shutting down:

• Engine adaptation (e.g. cylinder adjustment)
• Regeneration of the diesel particulate filter
• Carbon canister needs purging
• Insufficient knock resistance of fuel
• Engine fault
• Engine coolant temperature
  • below a defined value (depending on engine version approx. 20 ‐ 60 °C)
  • above a defined value (depending on engine version approx. 100 ‐ 130 °C)
• Automatic transmission not ready
• Gearbox adaptation active
• Drive position “S”, “M”, “N”, “R”
• Driving surface incline too great
• Assist system active (Active Cruise Control, Parking Assist, Hill Descent Control)
• Stop-and-go driving
• Last MSA stop was too long
• Air conditioning requirements:
  • MAX AC button pressed
  • Defrost button pressed (request to defrost the windscreen)
  • high blower speed and low blower temperature, compressor button pressed
  • high blower speed and air distribution directed to windscreen, compressor actuated
• Ambient temperature ≤ 3 °C
• Engine speed > 1200 rpm
• Battery condition:
  • State of charge too low
  • Measured battery state of charge not plausible
  • Battery temperature too high (approx. 50 °C)
  • Starting voltage drop from previous ASSF start too low
• Vehicle rolling

Thank you for the extensive list. A lot of checks as soon as I lift my foot of the brake! I also switched off the Auto Hold thinking this also made a difference to the stop-start however it's. not a listed item.

[ADSD530e]

2018 530e; I was having this same issue: After reading a ton of message posts as well being super intimidated about using any coding programs, I purchased BIMMERCODE as well as the recommended OBDLink CX. Super easy, I was able to Code "Sport Mode Individual" all to "Comfort" Settings and code in for my 530e to always start in this mode. The auto stop start is no longer kicking in and shaky on this setting. Also, I do not have to deal with constantly changing now when getting into the car.

After a full days worth of driving my MPG went from 39.8 to 37.8, so not much loss here and well worth the cost to not be frustrated with Stop/Start. I will make some other adjustments to I can dial in the full "Sport" settings as well to make this easier to activate when I want with my personalized settings.

[SquareWheels]

I had a 2020 440, that remembered that I turned it off, and it never came on again. I never did any coding.

Now I have a 2023 550, I am not a fan of ASS.
I do not want to code it to remember the last setting as I prefer not to do any coding.

I do not want to have to set my car to Sport every time I get in.

I just want to get in the car, have it default to Comfort, and drive. I don't want it stopping the engine, ever.

One scenario that I think is particularly silly is when I pull into my driveway, stop, and put it in reverse to back in my garage. When I stop, even for just 1 sec, the engine stops, then starts right back up when I put it in reverse. This must be adding to wear and tear on the starter.

Are there options?

[Joe-BMW33]

Originally Posted by SquareWheels

I had a 2020 440, that remembered that I turned it off, and it never came on again. I never did any coding.

Now I have a 2023 550, I am not a fan of ASS.
I do not want to code it to remember the last setting as I prefer not to do any coding.

I do not want to have to set my car to Sport every time I get in.

I just want to get in the car, have it default to Comfort, and drive. I don't want it stopping the engine, ever.

One scenario that I think is particularly silly is when I pull into my driveway, stop, and put it in reverse to back in my garage. When I stop, even for just 1 sec, the engine stops, then starts right back up when I put it in reverse. This must be adding to wear and tear on the starter.

Are there options?

Pay the dealer to turn it off. It is still coding, but more official and you don't have to do it yourself. But honestly, Bimmercode for $50 bucks or so and an adapter and you are in and out in two seconds with only a dew clicks.

[SquareWheels]

Originally Posted by Joe-BMW33

Pay the dealer to turn it off. It is still coding, but more official and you don't have to do it yourself. But honestly, Bimmercode for $50 bucks or so and an adapter and you are in and out in two seconds with only a dew clicks.

Thanks for the replies.

Does that void my warranty?
If I did that, do they undo it when they service the car?

[Joe-BMW33]

Originally Posted by SquareWheels

Thanks for the replies.

Does that void my warranty?
If I did that, do they undo it when they service the car?

If will not void your warranty. Remember, the car comes from the factory with this enabled because it was legal in just about any country except the US. When it’s a US car, they disable it. If you look at your VIN decide, you will see an entry for it being disabled. It’s also legal now and the dealer can do it if they want to, for a large fee I’m sure.

If the dealer flashes your car with new software, it will overwrite the coding back to disabled.

I tell the dealer to never update my software without asking me first. Honestly, they won’t update your software unless they are troubleshooting something.

It’s a really cool feature. It’s what the lights were meant to do.

EDIT - I had this thread confused with the AD/VLD thread, but no, disabling ASS will not void your warranty.