E46 Canbus Thread

[cmj]

I've seen quite a few threads regarding E46 / Canbus support.. It might be helpful if it's all in one spot.

I just wired into the canbus and everything is working as it should. Temp gauge is weird, but I understand that the cluster processes that information. Tach is smooth, and check engine light works.

My question is regarding speed.

Does the DME put the speed on the canbus? (i no longer have DME). I know that the MS43 has an input for unfiltered wheel speed..

What i'm saying is, my dashboard shows speed correctly, but choosing 'canbus' in software does not register speed there. Am I going to have to wire in the wheel speed sensor?

[magelius]

Original speed signal is processed in the acs/dsc/abs unit and speed signal is send to the original dme with separate wire. The pin is 40-pin black connector pin number 22. Try to use this, should work?
But individual wheel speeds should be also available in CAN messages. Don't know does the EMU support that information?

[cmj]

Original speed signal is processed in the acs/dsc/abs unit and speed signal is send to the original dme with separate wire. The pin is 40-pin black connector pin number 22. Try to use this, should work?
But individual wheel speeds should be also available in CAN messages. Don't know does the EMU support that information?

Based on this website: https://www.bimmerforums.com/forum/show ... us-project

The following data is available:

Code: Select all

ARBID: 0x1F0 (ABS)
Individual wheel speeds:
Signal wheel 1: startbit 0, bit length 12, Intel LSB, unsigned, gain 1/16 (0.0625) (byte0 + next 4 bits of Byte1)
Signal wheel 2: startbit 16, bit length 12, Intel LSB, unsigned, gain 1/16 (0.0625) (byte2 + next 4 bits of byte3)
Signal wheel 3: startbit 32, bit length 12, Intel LSB, unsigned, gain 1/16 (0.0625)
Signal wheel 4: startbit 48, bit length 12, Intel LSB, unsigned, gain 1/16 (0.0625)

I don't believe with the current canstream settings in the software, I can correctly input this message. Any input?

[Jadzwin]

Hi!

The problem is that the ABS is on another CAN bus. To make it work you need to connect CANs toogether and use user defined CAN to check if it work.
Then we can add this into the software

[Jadzwin]

Hi!

The problem is that the ABS is on another CAN bus. To make it work you need to connect CANs toogether and use user defined CAN to check if it work.
Then we can add this into the software

[magelius]

What about AC request via CAN? Does EMU support this message?

[cmj]

Hi!

The problem is that the ABS is on another CAN bus. To make it work you need to connect CANs toogether and use user defined CAN to check if it work.
Then we can add this into the software

I will look into this and report back. Thanks!

[magelius]

Hi!

The problem is that the ABS is on another CAN bus. To make it work you need to connect CANs toogether and use user defined CAN to check if it work.
Then we can add this into the software

What do you mean by "other CAN-bus"? There is only one actual CAN-bus and the other ones are BMW specific. According to BMW WDS, the wheel speeds are exchanged via CAN-bus. Two pictures attached.

[cmj]

I would like to get wheel speed via canbus and i'm to a point where I need to use it in my calibration.

Has anyone looked further into this, or gotten it figured out?

[Sm887]

I would like to get wheel speed via canbus and i'm to a point where I need to use it in my calibration.

Has anyone looked further into this, or gotten it figured out?

Hi.
Have you figured this out?

I wil be installing black in my E46 soon. Where did you connect to the canbus system? I am struggling to find any proper wiring info online.

[cmj]

I tapped into the canbus from the original DME location. Speedometer works through the ABS system but I have not put any effort into getting it into the EMU. I will probably just wire in the wheel speed output directly.

[Sm887]

I tapped into the canbus from the original DME location. Speedometer works through the ABS system but I have not put any effort into getting it into the EMU. I will probably just wire in the wheel speed output directly.

I see that in the latest software Can wheel speeds are added.
Have you gotten a change to test this? I wonder if all 4 wheels are supported.

I think the steering wheel button is via CAN aswell. I see AEM has the option to change boost levels ect. with the steering wheel buttons in E46, and boost level is shown by the RPM gauge.

[cmj]

Motor is out for a refresh. Will be going back together in the next week or two. Plan to play with this straight away. I’ll post back when I see what’s up.

[Sm887]

Thank you. I am exited to hear about it

[Sm887]

Update:
I have now connected EMU Black in my own E46. All 4 wheel speeds are working perfect via canbus

[Bimmer]

could anyone help me out ? Updated ECU firmware, downloaded latest version of software where it says that e46 CAN VSS is supported now. But my ECU still doesnt see vehicle speed. dashboard works fine by CAN... but no VSS. What is wrong with settings ? What CAN ID to use ?