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      09-05-2016, 05:10 PM   #1
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disabling ASD

Recent owner of a 2014 235i. I was searching the forums on ways to disable the ASD, and came across 2 options - technicPnP harness and via coding.

However, upon digging into ISTA/D (Rheingold), I saw two other options, which seem much simpler.

1. Per documentation attached, seems like disconnecting any speaker should disable ASD. Several members here have disconnected the center speaker on their HK systems - Have you verified if that disabled ASD?

2. There is a "muting ASD on" option in the ASD ECU in Rheingold. I enabled the option.

Is there an easy way to tell if ASD has been disabled?
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File Type: pdf asd.pdf (432.6 KB, 605 views)
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      09-05-2016, 05:28 PM   #2
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Not sure on the other options. I've opted for the Technic harness which physically isolates the ASD module from the speakers. Others have reported that disabling it via coding turns off the ASD sound, but leaves it in the path, which leaves the audio anomalies the ASD module generates present. I'd go with the harness. Easy way to check is to get on the highway, set the cruise at a set speed, 60mph perhaps? Then switch back and forth between comfort and sport, you should be able to hear the ASD kick in, even though there's no change in engine RPMs.
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      09-05-2016, 06:57 PM   #3
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Quote:
Originally Posted by orangeglim View Post
Not sure on the other options. I've opted for the Technic harness which physically isolates the ASD module from the speakers. Others have reported that disabling it via coding turns off the ASD sound, but leaves it in the path, which leaves the audio anomalies the ASD module generates present. I'd go with the harness. Easy way to check is to get on the highway, set the cruise at a set speed, 60mph perhaps? Then switch back and forth between comfort and sport, you should be able to hear the ASD kick in, even though there's no change in engine RPMs.
Per the documentation I attached, merely disconnecting a speaker should disable ASD. Just wondering if any forum member who has disconnected the center speaker but did not use the harness or coding method, has their ASD disabled? I'll try the method you suggested to check whether I was successful in disabling the ASD through ISTA/D. Thanks!
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      09-05-2016, 08:57 PM   #4
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Disconnecting the centre speaker did not disable ASD. I don't see where in that documentation it says anything of the sort, but if it does ... it's wrong. I disconnected my centre speaker and still had ASD. Bypassed it using Technic's harness.
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      09-05-2016, 10:12 PM   #5
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Quote:
Originally Posted by JohnnyCanuck View Post
Disconnecting the centre speaker did not disable ASD. I don't see where in that documentation it says anything of the sort, but if it does ... it's wrong. I disconnected my centre speaker and still had ASD. Bypassed it using Technic's harness.
It's at the very end of the document:
"At every engine start (pure electrical driving mode or driving mode with combustion engine), the ASD control unit checks whether all speakers, including acoustic sensors, are connected. If a speaker is detected as disconnected, the ASD control unit switches the ASD function off completely. Not until all speakers are detected as connected does the ASD control unit release the ASD function."

The documentation is from the software the dealers use for diagnosis, so I'd be very surprised if the documentation was wrong - likely that i'm reading it incorrectly.

I'll report tomorrow whether turning mute ON in the ASD ECU helped.
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      09-06-2016, 10:06 AM   #6
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I see it now, but my own experience is that it had no effect on ASD.
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      09-06-2016, 10:47 AM   #7
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this is very interesting.

boot up detection is possible and is consistent to what i found when removing/reinstalling the center speaker. A true reboot is necessary in order to reactivate the previously removed center speaker
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      09-06-2016, 11:36 AM   #8
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Quote:
Originally Posted by daimeow View Post
this is very interesting.

boot up detection is possible and is consistent to what i found when removing/reinstalling the center speaker. A true reboot is necessary in order to reactivate the previously removed center speaker
sorry, I'm not following you - Are you saying you did notice that ASD was disabled when you disconnected the center speaker?
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      09-06-2016, 11:40 AM   #9
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Quote:
Originally Posted by JohnnyCanuck View Post
I see it now, but my own experience is that it had no effect on ASD.
yeah, it is somewhat confusing -- several members with HK audio have disconnected their center speakers, but none reported that ASD was turned off, so that's consistent with your experience

BTW, during my commute today on the highway, I switched from comfort to sport and back several times (at about 60 - 65 mph). All I noticed was a rpm increase (or decrease when going from comfort -> sport) and a mild growl that accompanied it -- seemed quite different from the over-the-top engine growl that I used to get previously when I moved from comfort -> sport. Looks like ASD has indeed been turned off.

I'll turn muting off in the ASD ECU in Rheingold and test to see if the loud artificial growl is back.
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      09-06-2016, 07:16 PM   #10
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Quote:
Originally Posted by bmwx5er View Post
yeah, it is somewhat confusing -- several members with HK audio have disconnected their center speakers, but none reported that ASD was turned off, so that's consistent with your experience

BTW, during my commute today on the highway, I switched from comfort to sport and back several times (at about 60 - 65 mph). All I noticed was a rpm increase (or decrease when going from comfort -> sport) and a mild growl that accompanied it -- seemed quite different from the over-the-top engine growl that I used to get previously when I moved from comfort -> sport. Looks like ASD has indeed been turned off.

I'll turn muting off in the ASD ECU in Rheingold and test to see if the loud artificial growl is back.
You really should do the highway test with the cruise control set like orangeglim suggested. That way there's no change in rpm when you switch modes. Much easier to tell for sure if the ASD is disabled.
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      09-07-2016, 04:47 AM   #11
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Quote:
Originally Posted by bmwx5er View Post
BTW, during my commute today on the highway, I switched from comfort to sport and back several times (at about 60 - 65 mph). All I noticed was a rpm increase (or decrease when going from comfort -> sport) and a mild growl that accompanied it -- seemed quite different from the over-the-top engine growl that I used to get previously when I moved from comfort -> sport.
Put the transmission in Manual mode first, upshift to top gear, and THEN do the test. That way, there's no RPM change.


Quote:
Originally Posted by wjones14 View Post
You really should do the highway test with the cruise control set like orangeglim suggested. That way there's no change in rpm when you switch modes. Much easier to tell for sure if the ASD is disabled.
No. Cruise control setting will have no impact on the RPM change.

If you want to see if ASD is still there, pull the shifter left (moving to transmission manual/sport mode), upshift to 8th gear with cruise set on the highway, and THEN do the switch between Sport/Manual using the switch. In that case, the RPM won't change.
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      09-07-2016, 12:19 PM   #12
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Quote:
Originally Posted by wjones14 View Post
You really should do the highway test with the cruise control set like orangeglim suggested. That way there's no change in rpm when you switch modes. Much easier to tell for sure if the ASD is disabled.
I saw change in RPM when changing modes even in cruise.
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      09-07-2016, 12:20 PM   #13
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Quote:
Originally Posted by Zooks527 View Post
Put the transmission in Manual mode first, upshift to top gear, and THEN do the test. That way, there's no RPM change.




No. Cruise control setting will have no impact on the RPM change.

If you want to see if ASD is still there, pull the shifter left (moving to transmission manual/sport mode), upshift to 8th gear with cruise set on the highway, and THEN do the switch between Sport/Manual using the switch. In that case, the RPM won't change.
Yep, upshifting manually to 8th gear worked - thank you for the suggestion! I noticed no change in rpm or engine "growl" when switching modes. Looks like ASD has been disabled, but i'll repeat the test after turning muting OFF, just to be sure.
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      09-07-2016, 03:03 PM   #14
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The TecnicPnP harness is the only way to go, all of that racket is gone and the HK radio sounds better too. The one thing that I didn't expect was that any/all exhaust drone that I thought I was hearing all went away with that stupid ASD.
(what were they thinking) I would recommend it to all, so far the best and cheapest improvement you can make to your car.
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      09-07-2016, 04:03 PM   #15
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Option 3:
If you have JB4 you can disable it through the dash menu.
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      09-07-2016, 06:48 PM   #16
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Quote:
Originally Posted by bmwx5er View Post
I saw change in RPM when changing modes even in cruise.
Sorry, this shows my ignorance regarding automatics. Never owned one in 40 years of driving!

If you're using cruise control with a manual, there will be no rpm change when changing modes between Sport and Comfort. Didn't realize that changing modes with an automatic while in cruise will change gears... ugh.

You can also do the ASD test in your driveway. Get rpms to 2000 or so and switch modes.
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      09-08-2016, 04:30 AM   #17
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Quote:
Originally Posted by Anthony235 View Post
Option 3:
If you have JB4 you can disable it through the dash menu.
Cannot !!!
I got the below information from JB4's website.

OBDII In Dash Menu
'***************************************

'0 map menu, map shown on tach. Note map guide above.
'1 Not used for this model
'2 Boost gauge on fuel, boost is shown in the fuel gauge under heavy throttle with empty being 0psi boost and full being whatever you've assigned to your boost failsafe PSI on the user adjustment page. Default is 18psi. To enable this feature move the tach from 0 to 1.
'3 LED MAX brightness mode. For those with factory LED headlights this option brightens HALO during nighttime operation. To enable this feature move the tach from 0 to 1.
'4 OBDII Diagnostic Code Delete
'5 1st gear boost limit setting. 0-7000rpm = 0-20psi.
'6 2nd gear boost limiter
'7 3rd gear boost limiter
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      09-08-2016, 10:03 AM   #18
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Quote:
Originally Posted by daimeow View Post
Cannot !!!
I got the below information from JB4's website.

OBDII In Dash Menu
'***************************************

'0 map menu, map shown on tach. Note map guide above.
'1 Not used for this model
'2 Boost gauge on fuel, boost is shown in the fuel gauge under heavy throttle with empty being 0psi boost and full being whatever you've assigned to your boost failsafe PSI on the user adjustment page. Default is 18psi. To enable this feature move the tach from 0 to 1.
'3 LED MAX brightness mode. For those with factory LED headlights this option brightens HALO during nighttime operation. To enable this feature move the tach from 0 to 1.
'4 OBDII Diagnostic Code Delete
'5 1st gear boost limit setting. 0-7000rpm = 0-20psi.
'6 2nd gear boost limiter
'7 3rd gear boost limiter
You are wrong and the JB4 website is not accurate for m235i specific features.

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      09-08-2016, 09:54 PM   #19
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Quote:
Originally Posted by Anthony235 View Post
You are wrong and the JB4 website is not accurate for m235i specific features.

Would you mind sharing how in the menu and where you get that information?
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      09-08-2016, 09:58 PM   #20
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Tested with center speaker removed.

I kept changing back and forth from comfort to sport. RPM is constant and ASD cannot be disabled.

You don't need cruise control or anything to do this test. It's extremely obvious.
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      09-09-2016, 08:30 AM   #21
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Quote:
Originally Posted by daimeow View Post
Tested with center speaker removed.

I kept changing back and forth from comfort to sport. RPM is constant and ASD cannot be disabled.

You don't need cruise control or anything to do this test. It's extremely obvious.
How did you get the rpms to stay constant when switching modes without doing anything different? I was unable to get it to stay unchanged except when I did the upshift-to-8th-in-manual trick.
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      09-09-2016, 10:07 AM   #22
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Quote:
Originally Posted by daimeow View Post
Would you mind sharing how in the menu and where you get that information?
It's option 1 in the Jb4 dash menu. The m235i is the only F series N55 car that has ASD so BMS will say it's not used for this series of cars. The exception is the m235i and it does work

I've tested it multiple times. Takes 15 seconds for me to switch it on and off.

0 map menu, map shown on tach. Note map guide above.
'1 Not used for this model
'2 Boost gauge on fuel, boost is shown in the fuel gauge under heavy throttle with empty being 0psi boost and full being whatever you've assigned to your boost failsafe PSI on the user adjustment page. Default is 18psi. To enable this feature move the tach from 0 to 1.
'3 LED MAX brightness mode. For those with factory LED headlights this option brightens HALO during nighttime operation. To enable this feature move the tach from 0 to 1.
'4 OBDII Diagnostic Code Delete
'5 1st gear boost limit setting. 0-7000rpm = 0-20psi.
'6 2nd gear boost limiter
'7 3rd gear boost limiter
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