M-Track Mode

[lynas]

Hi,

Great thread, there's another company using your PDF on their site BTW.

However, I also got stuck at SG/SG GET and wrote (I'm guessing) $7MA with FA_WRITE to ALSZ and AKMB by using Change ECU. and then did SG_Codeiren for AKMB, HOWEVER, when I go to change to MK60, it's not there?? Is this a profile thing or SP_DATEN thing?

I have the light on dash and it's deffo got an MK60 as its complaining about brake pressure on circuit 2 and I can read values from it. (Ordered x2 new sensors)

Next fly in ointment, the car has F80 brakes on it at front, is it possible previous owner did something? Unlikely and I'm probs over thinking it. Mine is a 2004 SMG.

I'm probably being an idiot here. I can see DSC in list of ECU's but not overly confident that's correct.

[old///MFanatic]

There is a fairly significant bump after the start/finish line. Without DSC on the car feels fine to me. With M track on it freaks out and seems to apply brakes to rear axle.
I also have codes related to yaw sensor. So there are multiple threads that may have caused it. Just trying to cover all the bases.

Ah I see. Possible that bump is causing traction loss.
GL with tracking down the issue.

[eacmen]

Interested to hear why M-Track mode would intervene on a “straight”?

fwiw I drove for a quite a while on my CSL/ZCP brake swap (before coding over the brake bias) with M-Track mode on often. Never an issue with intervening.

There is a fairly significant bump after the start/finish line. Without DSC on the car feels fine to me. With M track on it freaks out and seems to apply brakes to rear axle.

I also have codes related to yaw sensor. So there are multiple threads that may have caused it. Just trying to cover all the bases.

[old///MFanatic]

Had an issue this weekend with mtrack mode intervening in the rear on the straight at summit point. I had originally coded m track mode to non-ZCP brakes. Before the event installed the Stoptech trophy bbk on all 4 corners..

Interested to hear why M-Track mode would intervene on a “straight”?

fwiw I drove for a quite a while on my CSL/ZCP brake swap (before coding over the brake bias) with M-Track mode on often. Never an issue with intervening.

[eacmen]

[QUOTE=zzyzx85;n163661]

https://thebuildjournal.com/tech-guides/brake-bias-chart-e46-m3/

Thanks. Could have sworn I looked at that chart before and 355mm wasn’t there.

Must be losing my mind.

[eacmen]

Do you know the piston sizes front and rear? Relative force at the pads is easily calculable given that and the MC sizes, and since the discs are the same size, relative brake torque at the wheels is the same ratio as the force

I couldn’t find the piston sizing data. Though the BJ chart seems to have the data I need. Looks like they are closer to ZCP than non-ZCP.

[repoman89]

Bumping this thread.

Had an issue this weekend with mtrack mode intervening in the rear on the straight at summit point. I had originally coded m track mode to non-ZCP brakes. Before the event installed the Stoptech trophy bbk on all 4 corners and didnt touch the m track coding.

Front is st-60 355mm rotor
Rear is st-40 355mm rotor

Anyone know what the bias of this kit is?

Maybe I need to code in ZCP brakes into the dsc to get rid of the weirdness on the straight.

Do you know the piston sizes front and rear? Relative force at the pads is easily calculable given that and the MC sizes, and since the discs are the same size, relative brake torque at the wheels is the same ratio as the force

[zzyzx85]

Bumping this thread.

Had an issue this weekend with mtrack mode intervening in the rear on the straight at summit point. I had originally coded m track mode to non-ZCP brakes. Before the event installed the Stoptech trophy bbk on all 4 corners and didnt touch the m track coding.

Front is st-60 355mm rotor
Rear is st-40 355mm rotor

Anyone know what the bias of this kit is?

Maybe I need to code in ZCP brakes into the dsc to get rid of the weirdness on the straight.

https://thebuildjournal.com/tech-gui...-chart-e46-m3/ <- bias charts are here. unfortunately I can't look at them cuz I'm at work lol.

[eacmen]

Bumping this thread.

Had an issue this weekend with mtrack mode intervening in the rear on the straight at summit point. I had originally coded m track mode to non-ZCP brakes. Before the event installed the Stoptech trophy bbk on all 4 corners and didnt touch the m track coding.

Front is st-60 355mm rotor
Rear is st-40 355mm rotor

Anyone know what the bias of this kit is?

Maybe I need to code in ZCP brakes into the dsc to get rid of the weirdness on the straight.

[T.J.]

From the doc:


That is an interesting statement, the author makes no claim as to which light modes mean M-track mode. On a non-M DSC, the short press is partial-off and long press is full off. So following that logic, short press should be M-track and long press be full-off. But on the M3 DSC the triangle light is full off. So maybe to be consistent they made the triangle+brake light M-track mode and we have been wrong this whole time?

Nope.

Is there a way to test this without driving the piss out of the car and trying to "feel" it?

Try to hang the ass out pulling onto a road

[eacmen]

From the doc:

This will make the DSC system act like the non-M DSC where a single press makes the DSC symbol light up, and a long press makes the DSC and Brake lights turn on

That is an interesting statement, the author makes no claim as to which light modes mean M-track mode. On a non-M DSC, the short press is partial-off and long press is full off. So following that logic, short press should be M-track and long press be full-off. But on the M3 DSC the triangle light is full off. So maybe to be consistent they made the triangle+brake light M-track mode and we have been wrong this whole time?

Is there a way to test this without driving the piss out of the car and trying to "feel" it?

[old///MFanatic]

Yes I did it myself a couple weeks ago and do not have the green circle/arrow light and had to program the alternative lighting method. The functions perform as I described in my previous post.

Well that's interesting. Didn't know they could be coded differently, had this for 7 years. If that's the case anyone know if you can make the default without any buttons touched M-Track mode?
Where's TerraPhantm been lately? Wasn't this his coding crack?

Either way if DTC and CBC switch with this write-up I would love for it to be one press. Going to recode it this weekend to this latest write-up then.

[Dash1]

I did this back in 2013. So if there is a new coding out perhaps. But I can confirm that when I have the "long press" that lights up my DSC+Brake light it's in M-Track mode. I can get the DSC to intervene sometimes under very hard acceleration and turns. Without this settin (no buttons touched) it will intervene early and often otherwise in same driving scenario.
The first press just lights up the usual amber DSC warning triangle (like normal) and turns off DSC and never has intervened during aggressive driving.

Forgive me for asking, not trying to sound rude but have you personally done this to your own car without the M-Track light in dash?

To be honest I would much rather have the M-Track mode turned on with a quick press of button like the ZCP. If this infact does just that I will recode it again once confirmed it is in fact the case.
My car is an early '03.

Yes I did it myself a couple weeks ago and do not have the green circle/arrow light and had to program the alternative lighting method. The functions perform as I described in my previous post.

[old///MFanatic]

If you followed the tutorial then you have it vice versa. DSC light ON is M-track mode. DSC ON and orange BRAKE ON means DSC is off.

I did this back in 2013. So if there is a new coding out perhaps. But I can confirm that when I have the "long press" that lights up my DSC+Brake light it's in M-Track mode. I can get the DSC to intervene sometimes under very hard acceleration and turns. Without this settin (no buttons touched) it will intervene early and often otherwise in same driving scenario.
The first press just lights up the usual amber DSC warning triangle (like normal) and turns off DSC and never has intervened during aggressive driving.

Forgive me for asking, not trying to sound rude but have you personally done this to your own car without the M-Track light in dash?

To be honest I would much rather have the M-Track mode turned on with a quick press of button like the ZCP. If this infact does just that I will recode it again once confirmed it is in fact the case.
My car is an early '03.

[Dash1]

No. Not on mine that's coded.
DSC light on means DSC is turned OFF (just like usual) one press
DSC+Brake Light means M-Track mode is on. long press

If you followed the tutorial then you have it vice versa. DSC light ON is M-track mode. DSC ON and orange BRAKE ON means DSC is off.