What Module Controls The ECH2?
 

Goal: Change the speed at which the "off road" ride setting disengages.

The ECH2 trace file pulled with NCS shows basically nothing. So I would think the command to drop the car back down to normal height at 50 kph is coming from another module, it has to be. I'm looking for direction as in which module to search in and further more what to look for. I was thinking I would see a "50kph" some where, but I have yet too. I'm thinking it is going to involve a "wert" value change.

Thanks!

http://www.bimmerboard.com/members/q...%20Diagram.jpg

http://www.bimmerboard.com/members/q...20ECH%20II.jpg

http://www.bimmerboard.com/members/q...20ECH%20II.jpg

The EHC2 module monitors speeds and various from the k-bus and/or CAN bus. I would be surprised if this was a programmable feature.

Since it is not a dedicated signal (like a compressor temp signal, for example), I'm not so sure it's going to be spoof able.

I know my car is not pleased if I have the height too high and am going 60 per. I've had it up and rolling, and I can feel it in the wheel. I figure if I can feel it, my CV joints are pissed at me.

Thanks Qsilver. I actually have that complete file and it shows (page 20) the GM3 going into the ECH...... So I am now scouring the GM trace file trying to find something related to the air suspension. Do you think I'm on the right track?

Subscribed! Would love to be able to drive over 25mph in the lowered setting, without the ECH2 module raising the car back to standard ride height. I've gone through the whole GM3 trace file though and didn't notice that option anywhere. I'll keep checking here for updates.

Ya I'm on a mission:)

The vehicle now is lowered 19mm at all settings. Off road mode is all most "normal" now. We want to be able to raise the vehicle to this modified level (which is right at stock normal height) and be able to drive it like that and at the same time be able to put it back to normal (slammed) via the dash switch.

Not going to be able to be coded. Intrax used to sell a module which overrode it but they are no longer made.

find a height you like to drive at normally and keep it there.

Oh come on RB, you need to be more optimistic:)

If someone found something to over ride, great! We need to figure out what they are over riding. There is obviously a signal coming from another module that is telling the EHC to activate. That being said, this is happening at a certain value, which in my eyes, this would have to be programmed somewhere....

I would email Intrax then, if it was as simple as coding a module out, they wouldn't have success selling it for $700+ back a few years ago.

There has to be something plugged in-line with the ECU and/or the GM between it and the module resisting the signal. I'm optimistic, but its been talked about before but never accomplished.....yet.

Here is the Intrax manual so you can get a feel of how its piggybacked into the module..

http://www.dvs-one.com/4sale/ICM-20.6.103.pdf

This would be the company in the Netherlands?

700 bucks a few years ago?

Thinking out loud here and trying to boost my optomisism... There are piggybacks and add on modules people pay hundered's for today to increase HP on an engine, yet you can obtain the software and most of the how to knowledge for FREE, but maybe only 1-2% of the gear heads do this...

Thats why I wanted to share the info with you and perhaps you can gather what may be needed by the way the Intrax was directed to be wired up.

This is getting interesting!

Ok guys still acquiring info...

Can anyone confirm that a euro version e53 equipped with an ech2, lowers from off-road mode at 50kmp?

Does anyone know if the ech2 module, in an e53, is flashable?

Does anyone here have any experience with winkfp? Or better, you might have a daten file from the ech2 on a euro model that was extracted with winkfp.

Basically where I'm at now is digging into the ehc2 with winkfp. This program will pull a different file (flash file? Or flashable file) and allow me to modify the flash. If I had a different flash file from a module (euro?) with a different activation speed, this task would become somewhat easy at that piont.

According to Realoem, the Euro E53 models use the same EHC2 module, part number ending 999. The Euro models also appear to use the same GM3 modules as US. So I don't think there's any difference in the way they operate.

The EHC2 modules are not flashable with WinKFP. There are Daten files for diagnostics, but nothing that can be updated. The only thing I can think of is that there are options (activ/nicht activ) in the trace file that control this. NCS Dummy doesn't have explanations for several options. It must be one of those (if it's possible).

Part number will be the same. The code/program/flash/ whatever you want to call it, can and is sometimes different.

Example would be the GM module that comes on a us spec car would not have windows up via key fob, euro spec cars (Acording to my knowledge) do. So the same part number would do different things. I beleive the code/program is labeled on each module, but again I could be wrong on that.

Have you tried to flash an EHC module?

I'm not sure about that. Every module has unique hardware and software numbers. In revisions of any module, hardware may stay unchanged, but if software changes then the module will be given a new part number from BMW. Since the US and Euro models share the same part number, I would argue that they are the exact same coding (unless otherwise dictated by the car's ZCS). But the ZCS has nothing about when the EHC2 module does what.

The module can't be flashed in Winkfp. The only modules on an E53 that can be flashed are engine, trans, ABS, transfer case, and vanos. Navigation can be updated via update CD. That's it.

The only way this can be done in my opinion is via the trace file using NCS Expert. Otherwise, in INPA, the activate/modes screen has lots of different modes that I've never tried. I'm not sure what any of them do but one or two. Does someone want to experiment?

So you feel that say a GS8 tranny module in our e53's would have the same coding as a GS8 in an e38? Or just the same coding for each module, in the same model car?

May be I can start a new thread to ask euro owners what options they have. This would confirm or denie a different coding.

Thanks for your help and interest.

Edit: I understand more of what your saying.

Anything new on this topic?


I could provide data from a EU model...


Would be great if I could decide by my own about the level of the car.