E46 Can bus project.

[4004]

I've given up on interfacing new-er ACC with KCAN cars, but I forgot the original E38 didn't have KCAN - unlike the E46 peasants, E39/E38 got IBUS.
The (High) KOMBI/IKE seems to be the central IBUS gateway, and is also one of the key controllers of the ACC.

Would anyone know how feasible a KBUS->IBUS conversion is on an E46? Assuming KOMBI, GM, likely LCM need to be swapped? Is message structure the same on IBUS and KBUS?

[4004]

To answer part of my own question above, the message structure is indeed the same, and bus specs are the same.
The key issue is the different master/slave module allocation between KBUS and IBUS, so having an IBUS IKE (that is a master on its bus) and a KBUS LCM (which is a master on the KBUS) seems like it would not work

[kombinator]

Hi,

can someone send me a CAN log with an auto gearbox? I want to understand the message 0x43F.
I can already dispay the gear with Byte1

//Current Gear Display Information Byte1
//0 = Clear Screen
//1 = 1st Gear
//2 = 2nd Gear
//3 = 3rd Gear
//4 = 4th Gear
//5 = Auto / D
//6 = Neutral
//7 = Reverse
//9 = 5th Gear
//10 = 6th Gear

But I am missing the "S" or "M" and I don't know where it is hidden... My guess is from this page: https://www.ms4x.net/index.php?title..._ID_0x43F_EGS1
it must be in Byte2.
But yeah, i tried different values.. nothing worked..

[kombinator]

okay sorry, I have found it.
0x43F
Byte2 = 0x20 = "M"
Byte2 = 0x40 = "S"

[HeinrichG]

Hi guys,

I've buyed a E46 M3 instrument cluster and playing around with it. The cluster is from an UK M3, with mph / kmh speedo.

The oil temp, water temp, rpm gauges are okay and show appropriate values. But, the speedo shows nothing.

The Speedo-signal (BMW call them V1) definition is like this:

• length: 13 bits
• factor: 0.0625
• offset: 0
• byte order: intel
• value type: unsigned

And the layout of my ASC-message (0x153) looks like this:

0x153.jpg

Any ideas?

Many thanks!

[said]

Hello Thaniel

Please drop me a PM

thanks!

[EdsAutomotive]

For E90 information you would have better luck in the E90 thread here: https://www.bimmerforums.com/forum/s...(E60-E65-E87-)

And yes K-CAN isn't wired to OBDII. In older E90's like mine (2006) PT can is also not wired to the OBDII. Best to check a wiring diagram for your car or pull the connector and visually check what wires are there.

Hey bud. I have an M3 we did a swap on, Wiring Specialties provided the harness for the LS side and everything works great but now having issues with the CEL flashing due to some codes in the BMW side that won't clear due to being hard faults. Any way you could help us get this taken care of? Please message me if you would like to discuss, thank you.

[AndrewsHappy]

Amazing, this has helped me no end. Do you know if the fuel gauge is sent over the can bus, or have I got to find the pin and put a variable voltage through it ?

[AndrewsHappy]

I have the e46 instrument cluster which does not have the switched live for the instrument cluster back lights. I think it has to be turned on via the k bus. But I have spent all my effort on the can bus, it is quite deflating having to learn, buy the hardware just to get the dash board lights to light up, has anyone managed to do this via the Can Bus....or have I got no choice but to learn the kbus!

[Thaniel]

Amazing, this has helped me no end. Do you know if the fuel gauge is sent over the can bus, or have I got to find the pin and put a variable voltage through it ?

If memory serves the fuel senders are connected via direct connection to the cluster (not on can bus). The cluster does the analog to digital an outputs the levels on the bus and on the gage

[dsmonsta]

Wow! Thanks for all the hard work and this awesome thread! It’s a wealth of information.