DSC / MK60 Behaviour | AEM
5 posts / 0 new
Last post
paulclaude
Offline
Last seen: 4 months 1 week ago
Joined: 08/21/2017 - 01:02
DSC / MK60 Behaviour

Hi AEM,

Recently installed an AEM Infinity in an E46 M3 with the Plug and Play jumper harness. Very impressed with it!

A question - in the plug and play harness manual, it states the following;

"The BMWVDC system, when enabled, may apply brake pressure to one ormore of the wheels to maintain
vehicle stability during spirited driving"

Does this mean that the braking/stability control from the MK20/MK60 DSC module is still active, even though TC is handled by the Infinity?

The car is primarily used on track, so obviously don't want the stock DSC applying braking.

Thanks, Paul

AEM_BB
AEM_BB's picture
Offline
Last seen: 1 year 5 months ago
Joined: 06/04/2014 - 11:53
Hey Paul,

Hey Paul,

The DSC/ABS system works mostly independently of the ECU, so the DSC/ABS system will still function like stock, where it will use the brakes to help stabilise the car. M Track Mode and full DSC disable will also still function using the DSC button.

However, the DSC is also responsible for sending a torque reduction request to the factory DME to close the throttles or pull timing to reduce engine torque. This part of the DSC system will no longer work with the Infinity, but because the Infinity has its own T/C system, you can essentially replicate that same functionality, or adjust how aggressively it intervenes.

Keep in mind if you get excessive wheelspin with the DSC still enabled, the DSC system may throw a fault and temporarily disable itself, but can be re-enabled with a key cycle.

paulclaude
Offline
Last seen: 4 months 1 week ago
Joined: 08/21/2017 - 01:02
Thanks for the explanation -

Thanks for the explanation - that makes perfect sense, I totally overlooked the fact that the DSC button would still control the normal/m-track/dsc off functions in terms of the braking/stability assistance. Problem solved!

I know from my own tuning and testing with the stock DME, there is a simple 1-byte change that stops the engine torque reduction request when DSC is triggered in all modes (tested this previously myself). I guess if it could be identified how that message is relayed to the DSC module, it would be a solution to preventing the DSC lights being triggered during excessive wheelspin with the Infinity.

Cheers, Paul

asimons15
Offline
Last seen: 2 years 9 months ago
Joined: 10/26/2017 - 20:03
So theres no way to Totally

So theres no way to Totally delete this? 

paulclaude
Offline
Last seen: 4 months 1 week ago
Joined: 08/21/2017 - 01:02
asimons15 wrote:

asimons15 wrote:

So theres no way to Totally delete this? 

I haven't re-visited this yet myself, but I think if you simply pull the fuse for DSC (61?), then code out DSC system from the cluster via NCSExpert, you should have active ABS via the MK20/60 along with no annoying cluster lamps illuminating during wheelspin.