So a bunch of people have swapped the M3 steering rack into their cars, but the servotronic is not enabled and there is no assist at low speeds. A member on another forum gave this tip:
So I'm thinking there has gotta be a way to make this work with some coding trickery. Did anyone get this working or know how to enable it? @Levanime @WedgePerformance
Update - I asked if he had made any progress and this is what he said:
Hope this helps guys....
I found that on a 1m the JBE controls the servotronic (pretty sure the dme does on a m3)
Hopefully that means that we can make servotronic work on our cars by possibly programming/coding the jbe and wiring it up
So the wires from servotronic go to the large connector on the back of the JBE/JB connector (X14270)
Pin 5 (black wire with brown stripe)
pin 6 (black wire with white stripe)
These are not listed in ANY wiring diagram, with factory diagnostic software it says those pins are not used. I verified by checking continuity between the servotronic connector and the pins at the jbe. Its 100% accurate.
The ZB number of the jbe that has working servotronic is 9264577
Remember this is on a 1M, im 80% sure this will work on a e90. It should work for sure on a 135i.
GOOD LUCK!
So I'm thinking there has gotta be a way to make this work with some coding trickery. Did anyone get this working or know how to enable it? @Levanime @WedgePerformance
Update - I asked if he had made any progress and this is what he said:
yes I was able to have a coder turn it on in the jbe. need a higher output PS pump though for good assist. Havnt got around to doing that. needs a 1m power steering pump. they are expensive