Powered tailgate struts

[AllyG13]

Hi,

Has anyone fitted newer power tailgate struts from an f15 to their e70?

Is there any canbus compatibility issues?

I dont have an e70 wiring schematic but have one for an f15 see attached.
The e70 has 5 wires (2 power and 3 to the hall sensors, which i presume are canbus?)
The f15 uses 6 wires, seems to have an extra shielded wire next to the power wires.

Im not too clued up on electronics, any help much appreciated.

The reason I ask is in the UK f15 struts are half the price of e70 and probably better.

Thanks.

[0-60motorsports]

Interesting and awesome if they are compatible

[gpeterson]

Looks like CAN isn't a factor as the struts are not directly on the bus in the F15 or E70, but I'd still be surprised if they fit physically or were compatible otherwise.

You can view the E70 wiring diagram at https://bmwteka.com/wds/en/e70/2991c3c6.

[AllyG13]

Thanks for link.
I think physically they are close enough overall, e70 strut Length from centre to centre is 522mm/ 148mm stroke and f15 is 538mm/ 138mm stroke.

[AllyG13]

So looking at the e70 diagram, all the hall.sensor wires are same colour as the f15 diagram.
The only difference is the additional shielding wire on the f15 strut that does not seem to connect to anything.
A quick google says its for shielding data (canbus) wires, so that begs the question why would this be needed if the struts do not use canbus...
As the e70 wiring harness does not have this 6th shielding wire, would it matter?

[ard]

just spitballing I say 1 in a million chance it works.

[AllyG13]

Well thats what Im trying to find out, dont want to throw away money.

[ard]

im guessing the wires are the 'easy' part- DC drive motor and two hall effects..the shielding is probably to prevent that long motor drive from creating spurious RF which can hose other modules/circuits (ie radio antenna input at the rear). As a practice, they shield wires for two reasons- prevent signals getting in AND/OR prevent noise from getting out!


Is the 'gearing' on both the same? You cannot reprogram the control system, so are they calibrated the same? ie one turn = one Hall impulse = x.x mm... needs to be the same on both. IMO. The system expects that (say) '267 hall impulses will be a full opening' for the E70 application. is this the same on the F15?

I gave the TIS a quick review on both, seems to be the same basic system, wires count is the same. (ie 5 wires plus the shield, same on both F15 and E70 when I looked)


If you do test it, start with just one.



And then if you find a solution and tell all of us, start a go fund me and we can pony up a few quid as a reward for this intrepid quest!


GL!