Citroen c2 can data help

ADU
1

Since installing the adu having issues with the bcm in the car. Is there full can stream data available as something must be missing and unable to pinpoint it

Any help would be appreciated

Thanks

Ben

2

Hi,

Which model year of the C2?

And did you remove the OEM cluster?

3

2008 vts

1.8t / Dsg conversion

Adu / emu black. cluster removed

4

So what is the actual issue you have?
What are the symptoms?

Do you have the C2 CAN stream enabled in EMU?

There might be some messages sent from the OEM cluster, and removing them broke communication.

To test it, you could temporarily connect the cluster to see if the issues go away.

If that’s the case, we can try to log the CAN bus and identify which other CAN frames need to be replicated.

5

Bsi randomly goes into eco mode and beeps

This has only happened since adding the adu to the car.

Issues go away with original cluster connected

can stream cannot be enabled with the emu as the Dsg and Citroen stream have some of the same addresses. So they clash with shifters etc

emu can streaM worked perfectly before car was Dsg so ideally would like to add the full can stream to the adu so that emu can run the dsg and the adu sends signals to the Citroen system

Hope that makes sense

Thanks

Ben

6

Yeah, as I said, the BCM requires some frames from the cluster.

The problem is that EMU doesn’t have “full stream”. The C2 CAN stream emulates the OEM ECU, so it doesn’t send cluster frames. And we don’t know which frames the cluster sends.

There are two solutions:

  1. Recording CAN communication with the OEM cluster connected, and trying to replicate the required frames with ADU.
  2. Connecting the OEM cluster and hiding it, so it’s connected to the system, but not visible to the passengers. You can try to disassemble it a bit so it’s smaller and easier to put somewhere.
7

Thanks for the info I can add the cluster back in and try and work out the data

Is the can data you do have available for us?I feel it could be useful in Getting the car right

Thanks for all your help

Ben

8

When the C2 stream is enabled, EMU is sending frames with the following IDs:
0x208
0x348
0x38D
0x488
0x50D

There are 4 real-time values we are sending in those frames.
The remaining bytes are replicated from the OEM ECU.
Real-time values:
Engine RPM
Vehicle speed
Engine coolant temperature
Engine check light status

You can try to find frames sent by the cluster by using a USB-to-CAN interface and comparing frames when the dash is connected vs. disconnected.

9

Thanks for the help

I will get logging and try and work it out

Thanks