Servotronic on a 335i
- Thread starter doublespaces
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These are the 2 strange codes. The other strange thing is that there is no any fault on the Servotronic. My latest thoughts are that not every GBBF 3 has Servotronic function.
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Small update, but apparently my power steering pump is 135 bar. Makes me wonder if they are just ripping people off because it's an M part and the difference lies in the module coding perhaps.
In the pic here (mid right in the photo) the wires(like I have) coming from the rack are brown and red/purple, and in the photo on the right are black/white and brown/black. Where did they change and what matches what? Sorry I feel so out of sorts doing this I have been trying to figure this out on my own.EDIT:
On the wds diagram on the first page, pin 5 is the Black/Brown wire and pin 6 is the Black/White wire. Had to figure out what SW/BR and SW/WS meant.
Edit 2: Feeling stupid because this information was quoted in my first post. I think I have information overload
Here is an updated photo:
View attachment 3369
Someone mentioned on E90 post that there is a restrictor built into the high pressure side of the power steering lines on older BMWS to make the steering feel heavier. Pretty sure the same restrictor is present in the N5x steering line. I might play around with removing it to see how light the steering becomes. Might be considerably easier than trying to get servo to work... Or, someone produce a slight overdrive pulley for the pump... No one seems to be able to get servo retrofitted correctly.
as long as you have a jbffe3 you can hook it up and code it then it will work 80%, if you want 100% you will need to upgrade your steering pump to a 1m/m3 steering pump
if you dont have a jbbfe3, you can retrofit it and it should just work the same
the pinout is somewhere in this thread...iirc it goes directly from the motor on the steering rack to the jbbfe
unfortunately i only have a jbbf2 and dont feel like retrofitting one for steering assist so i cant help on this
I'll have to read back through the thread. Lots of info here so I am not even sure what applies to me lol. 2011 135i so I am guessing I have JBBF3. You make it sound like I can just wires up the servo and it should operate fine (not full assist but better than nothing?) No coding?
Alternatively, I am going to look into removing shims from the power steering pump pressure regulator. The in-line restricter that I had previously mentioned IS present in the high pressure line but removing it would actually make the steering heavier (from what I understand anyway). But, the E46 M3 guys used to ADD shims to the power steering pump to make the steering heavier so I believe removing one or two of the factory shims might give me the 20% boost in assist I am looking for. Might be easier than the multiple 10 page long threads that getting the servo to work has created lol.
Comprehensive BMW Steering Information Thread - BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)
Comprehensive BMW Steering Information Thread E46 M3 (2001-2006)
www.m3forum.net
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Pretty sure there is coding involved, and from what I recall there were just not as many options available in terms of refinement.
Finally going to try to tackle getting servotronic hooked up.
Any chance you can describe how to remove the x14270 plug from the back of the junction box? I cant get at it at all. Am I going to have to pull the whole thing down?
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Is that the thing on the side or up under the glovebox?
Either way, the wires are tight and to avoid accidentally depinning anything I pulled out everything. It was a pita but you can see properly.
Either way, the wires are tight and to avoid accidentally depinning anything I pulled out everything. It was a pita but you can see properly.
Alright I'll start taking out the glove box lol. Thanks.
Yeap... It's another one of those positions where you get uncomfortable but there is only one way to get at it.
Got it out. Probably could've skipped all the disassembly now that I know how the harness disconnects. Pops right off when you slide its clip off similar to like how the injector harness works on the n55 dme.
Can you verify which repair kit you ordered? I had two pins laying around from an ambient temp sensor harness repair kit but they turned out to be just a hair too small. They dont slip into the harness right. Going to have to order up some new ones that are the right size.
