M5POST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read

Go Back   M5POST - BMW M5 Forum > F10 M5 Forum > Engine, Exhaust, Drivetrain Modifications

Post Reply
 
Thread Tools Search this Thread
      07-24-2014, 05:18 PM   #1
isugoo
Major General
isugoo's Avatar
United_States
247
Rep
6,125
Posts

Drives: 991.2 GTS
Join Date: Feb 2008
Location: Irvine, CA

iTrader: (73)

2014 M5 CP start-stop system malfunction

LAST STATUS UPDATED ON 10/13

Some of you guys know me from me threadjacking another member's post to discuss about my start-stop system malfunction. So I decided to make a new one of its own.

I purchased my 2014 M5 Competition package from Steve Thomas BMW on 5/3/14 and from the day 1, my start-stop system wasn't working properly.

Issue
It stops in stop lights but turns right back on within ~1 sec of time.

Even though I don't use this feature often, I want to fix it so it works properly whenever I want to use it. So I took it to Irvine BMW and here is recap:

6/3-6/5 (2 days)
1. Recharged battery overnight and cleaned up a portion of software relate to this issue - didn't fix it.

6/9-7/1 (22 days)
2. Reflash whole software with BMW NA's approval - didn't fix it.
3. Replaced switch unit per BMW Field Engineer's diagnose report - didn't fix it.

(My dealership foremen are working very closely with BMW NA from this point)
4. Replaced negative battery cable - didn't fix it.
5. Replaced Battery - didn't fix it.

7/8 - 7/11 (3 days)
(As they had to special order this unit for my VIN from Germany, I picked up my car and enjoyed between 7/1 to 7/7 and dropped off again on 7/8)
6. Replaced the ignition unit - didn't fix it.

7/21 - 7/26 (5 days)
(Special ordered DSC pressure sensor unit. Picked up and enjoyed for 2 weeks and back to shop on 7/21)
7. Replaced DSC Hydraulic unit with electronic control unit, brake bleeding
8. Replaced temp. sensor in lower radiator hose, engine cooling thermostat - didn't fix it.

8/18 - 8/21 (3 days)
(Special ordered ICM unit on 7/26 and took 3.5 weeks to get this part).
9. Replace ICM control unit and reprogramed car- didn't fix it.

9/22 (1 days)
10. BMW field engineer wants to gather some data from my M5 so dropped it off in the morning and picked up after work.

10/7 - 10/10 (3 days)
11. BMW NA recommended to replace DME. It took a few weeks to get it. But long store short, it didn't fix it.

10/23 - 10/25 (2 days)
12. BMW NA recommends to replace starter unit/module. Took a couple of weeks to get it but it didn't fix it. I'm waiting on the BMW's next move.

Total days at the dealership
41

BMW executive customer care offers
They finally came back and offered 2 options on 7/28:
• Option 1: Lease payment compensations
• Option 2: buy back at the full price I paid for

I decided to go with lease payment compensation and negotiated more months than they originally offered.
__________________

PAST: F80 M3 ZCP | 911.1 C2S | F10 M5 ZCP | E70 X5M | E90 M3 | E46 M3 | E36 M3

Last edited by isugoo; 10-25-2014 at 01:33 PM..
Appreciate 0
      07-24-2014, 05:35 PM   #2
Netwon
Second Lieutenant
Netwon's Avatar
Canada
8
Rep
222
Posts

Drives: '12 BMW M5 Alpine White
Join Date: Nov 2012
Location: Northern Alberta

iTrader: (0)

Garage List
2012 BMW M5  [0.00]
Just a quick question have you tried turning the climate control completely off and see if it still does this? Just use the fan speed switch to take it all the way down to off. This will tell you if it is in the climate system telling the car to start-up again.
Appreciate 0
      07-24-2014, 08:54 PM   #3
isugoo
Major General
isugoo's Avatar
United_States
247
Rep
6,125
Posts

Drives: 991.2 GTS
Join Date: Feb 2008
Location: Irvine, CA

iTrader: (73)

Quote:
Originally Posted by Netwon View Post
Just a quick question have you tried turning the climate control completely off and see if it still does this? Just use the fan speed switch to take it all the way down to off. This will tell you if it is in the climate system telling the car to start-up again.
I don't think I tried that. Next time I pick up my car (...), I'm def going to try.

But do you think it's possible climate control to trigger auto start/stop malfunction?
__________________

PAST: F80 M3 ZCP | 911.1 C2S | F10 M5 ZCP | E70 X5M | E90 M3 | E46 M3 | E36 M3
Appreciate 0
      07-24-2014, 08:59 PM   #4
Netwon
Second Lieutenant
Netwon's Avatar
Canada
8
Rep
222
Posts

Drives: '12 BMW M5 Alpine White
Join Date: Nov 2012
Location: Northern Alberta

iTrader: (0)

Garage List
2012 BMW M5  [0.00]
Quote:
Originally Posted by isugoo View Post
I don't think I tried that. Next time I pick up my car (...), I'm def going to try.

But do you think it's possible climate control to trigger auto start/stop malfunction?
From what I have read it will cut out the start stop if the cabintemp can't keep up. Also it will not stay off if the outside temp hits 35C (95f), you move the steering wheel or start to ease up on the brake peddle.
Appreciate 0
      07-24-2014, 09:45 PM   #5
isugoo
Major General
isugoo's Avatar
United_States
247
Rep
6,125
Posts

Drives: 991.2 GTS
Join Date: Feb 2008
Location: Irvine, CA

iTrader: (73)

Quote:
Originally Posted by Netwon View Post
From what I have read it will cut out the start stop if the cabintemp can't keep up. Also it will not stay off if the outside temp hits 35C (95f), you move the steering wheel or start to ease up on the brake peddle.
I will try it. But as Shop foremen, BMW field engineers and BMW NA are involved all looking into this issue so I don't think this is simple issue like that. But I'm def. going to try to see if it works/helps. Thanks,
__________________

PAST: F80 M3 ZCP | 911.1 C2S | F10 M5 ZCP | E70 X5M | E90 M3 | E46 M3 | E36 M3
Appreciate 0
      07-24-2014, 09:57 PM   #6
Spinny02
Lieutenant Colonel
Spinny02's Avatar
United_States
124
Rep
1,840
Posts

Drives: '14 M5 CP Dinan Stage 2
Join Date: Jun 2013
Location: Houston, Tx

iTrader: (2)

Garage List
Its always the simple things =). Hope thats it.
__________________
Appreciate 0
      07-27-2014, 06:56 AM   #7
Spinny02
Lieutenant Colonel
Spinny02's Avatar
United_States
124
Rep
1,840
Posts

Drives: '14 M5 CP Dinan Stage 2
Join Date: Jun 2013
Location: Houston, Tx

iTrader: (2)

Garage List
Any updates?
__________________
Appreciate 0
      07-27-2014, 12:51 PM   #8
isugoo
Major General
isugoo's Avatar
United_States
247
Rep
6,125
Posts

Drives: 991.2 GTS
Join Date: Feb 2008
Location: Irvine, CA

iTrader: (73)

Quote:
Originally Posted by Spinny02
Any updates?
I'm out of town and will pick up on Monday and I'll see what part(s) they special ordered this time.

After I pick up, I'll try with ac unit completely off.
__________________

PAST: F80 M3 ZCP | 911.1 C2S | F10 M5 ZCP | E70 X5M | E90 M3 | E46 M3 | E36 M3
Appreciate 0
      07-27-2014, 02:25 PM   #9
M6-Coupe
Major General
M6-Coupe's Avatar
1125
Rep
6,065
Posts

Drives: F92 M8
Join Date: Feb 2014
Location: Bay area

iTrader: (0)

Guys, have you seen the different threads in M3/M4 about DCT clunking noise if Auto Start/Stop is enable? Looks like an actuator (?) engages or disengages at Starting/Stopping the ignition when Auto srart/stop is enable. After reading those threads, I just tested my car and I heard the same noise. I had never recognized it since I don't use this at all.
BMW must remove this button from M cars
__________________
Current : 2020 F92 Black Sapphire M8 - ZF8
Gone : 2018 F80 Mineral Gray M3 - 6MT
Gone : 2016 F82 Austin Yellow M4 - 6MT
Gone : 2013 F13 Sakhir Orange M6 -7DCT
Gone: 2013 F13 Alpine White 650i -ZF8
Appreciate 0
      07-29-2014, 03:22 PM   #10
isugoo
Major General
isugoo's Avatar
United_States
247
Rep
6,125
Posts

Drives: 991.2 GTS
Join Date: Feb 2008
Location: Irvine, CA

iTrader: (73)

Quote:
Originally Posted by Netwon View Post
Just a quick question have you tried turning the climate control completely off and see if it still does this? Just use the fan speed switch to take it all the way down to off. This will tell you if it is in the climate system telling the car to start-up again.
tried it and it didn't fix it. =(
__________________

PAST: F80 M3 ZCP | 911.1 C2S | F10 M5 ZCP | E70 X5M | E90 M3 | E46 M3 | E36 M3
Appreciate 0
      07-29-2014, 03:44 PM   #11
isugoo
Major General
isugoo's Avatar
United_States
247
Rep
6,125
Posts

Drives: 991.2 GTS
Join Date: Feb 2008
Location: Irvine, CA

iTrader: (73)

updated new status and executive customer care offers on the first post.
__________________

PAST: F80 M3 ZCP | 911.1 C2S | F10 M5 ZCP | E70 X5M | E90 M3 | E46 M3 | E36 M3
Appreciate 0
      07-29-2014, 04:22 PM   #12
isugoo
Major General
isugoo's Avatar
United_States
247
Rep
6,125
Posts

Drives: 991.2 GTS
Join Date: Feb 2008
Location: Irvine, CA

iTrader: (73)

Quote:
Originally Posted by M6-Coupe View Post
Guys, have you seen the different threads in M3/M4 about DCT clunking noise if Auto Start/Stop is enable? Looks like an actuator (?) engages or disengages at Starting/Stopping the ignition when Auto srart/stop is enable. After reading those threads, I just tested my car and I heard the same noise. I had never recognized it since I don't use this at all.
BMW must remove this button from M cars
do you have a link???
__________________

PAST: F80 M3 ZCP | 911.1 C2S | F10 M5 ZCP | E70 X5M | E90 M3 | E46 M3 | E36 M3
Appreciate 0
      07-29-2014, 07:37 PM   #13
M6-Coupe
Major General
M6-Coupe's Avatar
1125
Rep
6,065
Posts

Drives: F92 M8
Join Date: Feb 2014
Location: Bay area

iTrader: (0)

Quote:
Originally Posted by isugoo View Post
do you have a link???
Here you go :
http://f80.bimmerpost.com/forums/sho....php?t=1011285
and this one:
http://f80.bimmerpost.com/forums/sho....php?t=1012562
__________________
Current : 2020 F92 Black Sapphire M8 - ZF8
Gone : 2018 F80 Mineral Gray M3 - 6MT
Gone : 2016 F82 Austin Yellow M4 - 6MT
Gone : 2013 F13 Sakhir Orange M6 -7DCT
Gone: 2013 F13 Alpine White 650i -ZF8

Last edited by M6-Coupe; 07-29-2014 at 07:45 PM..
Appreciate 0
      07-29-2014, 08:05 PM   #14
Spinny02
Lieutenant Colonel
Spinny02's Avatar
United_States
124
Rep
1,840
Posts

Drives: '14 M5 CP Dinan Stage 2
Join Date: Jun 2013
Location: Houston, Tx

iTrader: (2)

Garage List
Happy they took care of you and sorry you are seeing this!
__________________
Appreciate 0
      07-30-2014, 06:42 PM   #15
avlnch
Lieutenant Colonel
125
Rep
1,622
Posts

Drives: 2013 Individual M5
Join Date: Jul 2007
Location: South FL

iTrader: (0)

It's good that you have everything well documented. It looks like BMW has taken care of you while they continue to diagnosis the issue, which is great to hear.

What another member said about AC is a pre-condition (one of many) but these conditions must be met for the system to engage. It seems like your issue is the amount of time the start stop system works for. It should work up until the time you let off the brake pedal, and you said it only works for about 1 second.

It looks like BMW has properly escalated the issue and are trying all the various remedy's in attempt to solve it.

Keep us updated. Seems like a unique issue, but still let us know what the cause/fix ends up being.
__________________
2013 BMW INDIVIDUAL ///M5 {Frozen Black/Amaro Brown/Amaro Brown Alcantara/White Contrast Stitching/Piano Black Trim}
Appreciate 0
      07-31-2014, 06:01 PM   #16
isugoo
Major General
isugoo's Avatar
United_States
247
Rep
6,125
Posts

Drives: 991.2 GTS
Join Date: Feb 2008
Location: Irvine, CA

iTrader: (73)

Quote:
Originally Posted by avlnch View Post
It's good that you have everything well documented. It looks like BMW has taken care of you while they continue to diagnosis the issue, which is great to hear.

What another member said about AC is a pre-condition (one of many) but these conditions must be met for the system to engage. It seems like your issue is the amount of time the start stop system works for. It should work up until the time you let off the brake pedal, and you said it only works for about 1 second.

It looks like BMW has properly escalated the issue and are trying all the various remedy's in attempt to solve it.

Keep us updated. Seems like a unique issue, but still let us know what the cause/fix ends up being.
Thanks and will keep update this so it can be used for some future reference.
According to my dealership, BMW NA or Germany have never seen this issue on any of their cars with this feature.

Dealership SA, loaner dept, shop foremen are very professional and understand my frustration. BMW executive customer care was excellent with their top notch service.
__________________

PAST: F80 M3 ZCP | 911.1 C2S | F10 M5 ZCP | E70 X5M | E90 M3 | E46 M3 | E36 M3
Appreciate 0
      08-21-2014, 11:37 PM   #17
isugoo
Major General
isugoo's Avatar
United_States
247
Rep
6,125
Posts

Drives: 991.2 GTS
Join Date: Feb 2008
Location: Irvine, CA

iTrader: (73)

ICM unit came in after 3.5 weeks of waiting.
Dealer replaced ICM unit and reprogramed car but it didn't fix it!
Dealer is contacting the BMW NA for next step and I picked up my M5 until I hear next step from dealer/BMW NA. =(
__________________

PAST: F80 M3 ZCP | 911.1 C2S | F10 M5 ZCP | E70 X5M | E90 M3 | E46 M3 | E36 M3
Appreciate 0
      08-22-2014, 07:51 PM   #18
N.S.A
Major
United_States
112
Rep
1,136
Posts

Drives: 991 GT3 Blue Sapphire Metallic
Join Date: Jul 2013
Location: Southern California

iTrader: (1)

Quote:
Originally Posted by isugoo View Post
ICM unit came in after 3.5 weeks of waiting.
Dealer replaced ICM unit and reprogramed car but it didn't fix it!
Dealer is contacting the BMW NA for next step and I picked up my M5 until I hear next step from dealer/BMW NA. =(
I remember you telling me about this at the f10 crew meet in spectrum sorry to hear
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 04:32 AM.




m5post
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