[dan1111]

Hello.

I’ve bought a m sport differential and I am planning to change the stock open one.

From what I researched this would be possible but I need any advice if you have any.

If anyone did this before pleae share your insights.

From what I can see the GHAS control module is the same on both equipment levels, the wiring from the trunk seems do be the same but the sport diff has a plug. Is the wire hidden somewhere between the trunk and the underbody?

Would codding the VA be enough to enable the diff?

Thank you! I’ll update the post when I am done, diff arrives in couple of days.

[TheNine90]

I think you will need to modify the fa to match a vehicle equipped with m sport differential

[dan1111]

Yeah, that’s right. I found out I didn’t have the GHAS computer. I bought one and I need to install it. There is one plug going directly to the diff and one to the “car”. The plug for the car has 1 positive from fuse box, 1 negative, and 3 wires to the BDC. Still trying to figure out it I need to route them to the BDC in front or there is something in the trunk where I fan plug them in.

[TheNine90]

The GHAS needs to go to the bdc to be connected to the flexray. Not sure if there is spare flexray port allocations at the rear

[dan1111]

Based on the diagram the flexray goes from connector A416*1B (ghas module) to connector A258*8B (bdc module). Would a "spare port" show in the diagram?

[TheNine90]

You will have to open the ports using tool32 and then reset and relearn the flexray configuration.

[dan1111]

Originally Posted by TheNine90

You will have to open the ports using tool32 and then reset and relearn the flexray configuration.

So pretty much even if I run the wires from the GHAS connector to the front BDC connector and plug them in the coresponding PINs I still need to enable the ports using tool32?

Thank you, this is very helpful!

[TheNine90]

Yes. The GHAS needs to be added to the flexray configuration.

[dan1111]

Originally Posted by TheNine90

Yes. The GHAS needs to be added to the flexray configuration.

Thank's! I think I have everything I need now. I'll update this thread when everything is set up.

[hanselfransel]

Enabling ports with tool32.

Can you explain a little more precise please

[TheNine90]

open ZGW using tool32
steuern_flexray_pfad ==>F5(select required ports)
steuern_reset_learn_flexray==>F5

[hanselfransel]

Originally Posted by TheNine90

open ZGW using tool32
steuern_flexray_pfad ==>F5(select required ports)
steuern_reset_learn_flexray==>F5

Thank you for the answer,
is it possible to delete GHAS in the other direction.
If i like to retrofit a G80 with real diff its not possible to delete GHAS as i know.Is it possible to delete the ports,so that GHAS isnt shown anymore.If you remove GHAS its always shown in ista, don t know why
Do you know a way for this too?

[TheNine90]

Try deleting it from SVT and see if that fixes the issue.

[hanselfransel]

Originally Posted by TheNine90

Try deleting it from SVT and see if that fixes the issue.

No, the standard things i did several times

[TheNine90]

I can have a look at it if interested.

[hanselfransel]

I am searching for this for long time, i never had a full solution for error free retrofit for G80.
Ghas module is always shown with icom next although its not inside anymore.If you use normal enet its not shown , but with icom next its shown in ista.

So if you have good idea would be very nice

[TheNine90]

So issue is only ICOM? Check using tool32 the configuration of flexray

[hanselfransel]

Originally Posted by TheNine90

So issue is only ICOM? Check using tool32 the configuration of flexray

OK, will do