AiM Dash Display install

[t3ddftw]

Not necessarily, I did an INPA brake fluid flush on my MK60 without any connection to K-line. Only the can bus was connected to transfer information.
I also revisited the connector pinout of the MK60 as I did not recall K-Line from doing the conversion. There's no pin for K-Line.

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The EDIABAS API (what's under the INPA hood) is written entirely with the DS2 protocol in mind, which is exclusively used on the D-Bus (K-Line). As Heinz points out, CAN isn't even accessible from the OBD-II port.

CAN is used for high speed inter-module communication between the cluster, transmission controller, DME and DSC module.

-Ted

[heinzboehmer]

I also revisited the connector pinout of the MK60 as I did not recall K-Line from doing the conversion. There's no pin for K-Line.

BMW calls it TXD in their wiring diagrams. Pin 2 in the pinout Ted posted.

Here's the entire TXD1 (goes to pin 8 on the OBD II plug) bus:


There's also a TXD2 bus, but that just goes from pin 7 on the OBD II plug to the DME and transmission control module:



The two are bridged together by some jumpers on the OBD II plug cap.

[Altaran]

My configuration is specific to my car, not much help on yours to be honest.

I am running a few metrics from the standard AIM configuration on CAN1, and then picking up alot of metrics on CAN2. This is the only way to do it, in my opinion. I have a full list of some CAN ID's I can share in this thread that may be of use.

I have a custom module in place that is emulating the stock cluster, satisfying the MK60/SMG, as well as converting some KBUS/DBUS metrics to CAN.

That would be good for the other guys considering it in the future.
I changed my Aim Can Bus directly with the Ecumaster preset, since I run an EMU Black. It gives me a whole lot of additional things to grab. Though the BMW preset works as well for the info the stock ECU distributes on the bus.

What is the custom module you are running for the K-/D-Bus translation? Is this obtainable somewhere?

For the time being, all lighting options work for me using analog inputs. I am only waiting for the mounting fixture delivery and I still have to do the fuel tank sensor measurements, then it's good to go.

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[Altaran]

I think the big disconnect is that the industry refers to BMWs "D-Bus" as K-Line / K-Bus. BMW couldn't call it that because they decided to create an unrelated "Karosserie" Bus to simplify comms between the different body ECUs.

Anyhow, dug this up from the interwebs:


If INPA sees these values, then it's 100% available on the D-Bus.

I would guess that this DS2 command would give you the raw sensor data from the MK60:

56 05 90 00 C3

Logging the D-Bus while watching the values is going to be your best bet at deciphering it

-Ted

Not necessarily, I did an INPA brake fluid flush on my MK60 without any connection to K-line. Only the can bus was connected to transfer information.
I also revisited the connector pinout of the MK60 as I did not recall K-Line from doing the conversion. There's no pin for K-Line.

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[heinzboehmer]

Thanks Ted! I'll give it a shot soon

[t3ddftw]

Ah I'm kinda just grabbing info from this thread to add to my own datalogger (Gauge.S). I'm not sure if the AiM products can log values from D bus, but Gauge.S can. So, if brake pressure is on D bus, it should be simple to add.

I think the big disconnect is that the industry refers to BMWs "D-Bus" as K-Line / K-Bus. BMW couldn't call it that because they decided to create an unrelated "Karosserie" Bus to simplify comms between the different body ECUs.

Anyhow, dug this up from the interwebs:


If INPA sees these values, then it's 100% available on the D-Bus.

I would guess that this DS2 command would give you the raw sensor data from the MK60:

56 05 90 00 C3

Logging the D-Bus while watching the values is going to be your best bet at deciphering it

-Ted

[heinzboehmer]

Maybe I missed it what do you have in mind?

I really want to start looking at brake pressure data to further develop my skills...would be outstanding if I could get that through my AiM SoloDL without adding an additional sensor (reliability and weight).

Ah I'm kinda just grabbing info from this thread to add to my own datalogger (Gauge.S). I'm not sure if the AiM products can log values from D bus, but Gauge.S can. So, if brake pressure is on D bus, it should be simple to add.

[bigjae46]

Hmm, I was hoping nickpiper12 meant D bus as well, but found some other threads that say K bus. e.g. https://www.bimmerforums.com/forum/s...6#post28926476 and https://nam3forum.com/forums/forum/s...6797#post96797

Maybe everyone means D bus? If it's on D bus, then that would make my life super easy.

Maybe I missed it what do you have in mind?

I really want to start looking at brake pressure data to further develop my skills...would be outstanding if I could get that through my AiM SoloDL without adding an additional sensor (reliability and weight).

[heinzboehmer]

I'm going to assume Nick meant K-Line (D-Bus). Brake pressure is 100% not on the I/K-Bus.

Hmm, I was hoping nickpiper12 meant D bus as well, but found some other threads that say K bus. e.g. https://www.bimmerforums.com/forum/s...6#post28926476 and https://nam3forum.com/forums/forum/s...6797#post96797

Maybe everyone means D bus? If it's on D bus, then that would make my life super easy.

[t3ddftw]

On the K bus? That's a weird bus to have that info on. Pretty sure the MK60 isn't connected to the K bus, so some other module must be doing the translation from CAN/D bus to K bus.

Seems like there's a way to get two way communication between K and D buses using diagnostic messages. Don't know the specifics, but t3ddftw was talking about this on the Gauge.S discord the other day. Maybe I can get leverage this to get brake pressure data on the D bus and then onto my gauge. Another project added to the list!



Yes, please!

I'm going to assume Nick meant K-Line (D-Bus). Brake pressure is 100% not on the I/K-Bus.

Looking at the MK60 pinout, it has a connection to CAN H/L and D-Bus:


-Ted

[heinzboehmer]

The MK60 streams brake pressure data over KBUS, oddly enough. I have them converted to CAN on a custom ID the AIM can pick up.

On the K bus? That's a weird bus to have that info on. Pretty sure the MK60 isn't connected to the K bus, so some other module must be doing the translation from CAN/D bus to K bus.

Seems like there's a way to get two way communication between K and D buses using diagnostic messages. Don't know the specifics, but t3ddftw was talking about this on the Gauge.S discord the other day. Maybe I can get leverage this to get brake pressure data on the D bus and then onto my gauge. Another project added to the list!

I have a full list of some CAN ID's I can share in this thread that may be of use.

Yes, please!

[bigjae46]

Yes my stock cluster is completely removed. Once you do so, module to module communications become out of whack. The IKE serves as a “center” module, if that makes sense.

With it removed, DSC will be permanently off/ABS should function. Within the stock AIM configuration, I want to say they are able to get wheel speed and steering angle data. It's been a while since I tested this, so I can't remember if I had the stock cluster unplugged or not.

I still have SMG, so it complicated things. Immediately I received CAN errors due the MK60 not communicating with the SMG DME. Until the handshake between the cluster and DSC/ABS unit, it will not relay any data necessary for SMG to function properly.

Thanks for confirming. Can you still pull fault codes from the MK60 as you would when the OE cluster is plugged in?

Do you have any more info on how you converted brake pressure data to CAN?

[nickpiper12]

I just asked him for his Race Studio Config File, so I don't have to ask for the math formulas. Don't know if he would want to make that public, guess thats up to him. I have not received feedback on that pm...

I talked to tech support today as well. Using factory sensors is just like Nick said not going to be plug and play. The way they usually do it is connect ground and connect signal and connect current with a resistor to signal and start measuring. So getting this data and what type of resistor used would really help to speed things up.




How did you do that? I have not found that option in RS3. Does it "occupy¨ one of the two Can circuits? Since I run another ABS I need both Can Bus.

My configuration is specific to my car, not much help on yours to be honest.

I am running a few metrics from the standard AIM configuration on CAN1, and then picking up alot of metrics on CAN2. This is the only way to do it, in my opinion. I have a full list of some CAN ID's I can share in this thread that may be of use.

I have a custom module in place that is emulating the stock cluster, satisfying the MK60/SMG, as well as converting some KBUS/DBUS metrics to CAN.

[nickpiper12]

It is, but it's on another address than all the other parameters. Makes it annoying to grab if your device can't poll multiple at once.

The MK60 streams brake pressure data over KBUS, oddly enough. I have them converted to CAN on a custom ID the AIM can pick up.

[nickpiper12]

What's up!

Just wanted to verify that you deleted the OE cluster.

I'm not really concerned with DSC but does ABS still work normally? Can you still get data from the unit? I like looking at wheel speed and steering angle data.

Im thinking this should be easy for me, all I have is the ECU, MK60, LCM (brake lights), and the IKE. Everything else has been deleted. The only other data I want is brake pressure data that I can't already get through CAN.

Yes my stock cluster is completely removed. Once you do so, module to module communications become out of whack. The IKE serves as a “center” module, if that makes sense.

With it removed, DSC will be permanently off/ABS should function. Within the stock AIM configuration, I want to say they are able to get wheel speed and steering angle data. It's been a while since I tested this, so I can't remember if I had the stock cluster unplugged or not.

I still have SMG, so it complicated things. Immediately I received CAN errors due the MK60 not communicating with the SMG DME. Until the handshake between the cluster and DSC/ABS unit, it will not relay any data necessary for SMG to function properly.