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  #1  
Old 03-12-2018, 09:03 PM
EvolutionTME EvolutionTME is offline
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BMW F10 - Replaced Steering Rack motor

Hello,

I have a 2011 BMW F10 535i.

The car suffered damage to the steering rack motor. I have sourced a replacement motor (used) to put in this weekend.

I have realised that there is a coding and relearn procedure that i need to do to make this work again? Im confused whether I need to use Esys or Ista P? It seems Esys can do the coding but not the measures/learn procedure?

I also need to upgrade/downgrade the software version depending on what is on the steering ECU has and what the rest of the car has. is that correct?

I have ordered, a yellow Enet cable that should arrive for me later this week, so i can hopefully tackle this task.

Many thanks for your help.
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  #2  
Old 03-18-2018, 02:21 AM
EvolutionTME EvolutionTME is offline
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Ok i attempted to re code the steering rack motor over the weekend without any luck..

i selected replaced module and ISTA-P automatically selected EPS module for replacement and re programming. Every time i selected the confirm modifications it would come back about 15-20minutes later with the same screen. Im not sure what I'm doing wrong.

The car has many error codes because the battery died.This has been replaced with a new battery.

I noticed since changing the steering rack motor that there is a slight clunk every 30 degrees turning or so (when jacked up there is no clunk just a slight hesitation). This is when the car is turned on and the power steering is working. Otherwise the steering rack feels perfect when the car is off. I thought this may be fixed by coding and re calibrating the steering rack

Attached are some screenshots, hopefully this can shed some light on my issue.

The car was also hooked up to a 25 amp power supply throughout this whole process.
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  #3  
Old 03-18-2018, 03:02 AM
BMW-4-Life BMW-4-Life is offline
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Noises and clunks would indicate an issue with drive from the motor (maybe belt slippage).
And BMW had a change of rack at some point - when the motor drive pinion changed size.

You'll eliminate any physical or electronic internal compatibility issues if you swap it for an intact replacement rack - which isn't to say that what you're doing can't work, but it does keep things straightforward.
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Old 03-18-2018, 03:07 AM
EvolutionTME EvolutionTME is offline
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Thanks for your reply. I actually bought a replacement rack with motor. but my rack appeared fine so i just swapped the motors and tensioned it up.

The belt does appear a little loose through the pilot hole, Although it works fine when driving. the clunks dont feel like slipping because there is no momentary loss in power.

Maybe putting the motor back and replacing the rack is a better option. I was just hoping this may have been a relearn/programming issue.

Quote:
Originally Posted by BMW-4-Life View Post
Noises and clunks would indicate an issue with drive from the motor (maybe belt slippage).
And BMW had a change of rack at some point - when the motor drive pinion changed size.

You'll eliminate any physical or electronic internal compatibility issues if you swap it for an intact replacement rack - which isn't to say that what you're doing can't work, but it does keep things straightforward.
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Old 03-18-2018, 03:10 AM
BMW-4-Life BMW-4-Life is offline
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What year was the donor car ?

The motor pinion on the late racks was smaller - and belt slippage will likely be manifest in various unexpected ways.

Program with ISTA-P ... and teach in ISTA-D.
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Old 03-18-2018, 07:15 PM
EvolutionTME EvolutionTME is offline
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The Donor car was - c580922 - Prod.date: 2011-01-26

mine is Prod.date: 2011-04-19

I pmed you my vin number also

------

Im not sure if it helps, but as in my 4th screenshot, that asks to confirm replacement by ticking the EPS module number box and clicking "Modification Completed" resulted in the same dialogue box coming back 20 mins later..

Or is there a different section I code the used device first before doing this?

Thanks,

Last edited by EvolutionTME; 03-18-2018 at 07:22 PM.
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  #7  
Old 03-19-2018, 01:02 AM
BMW-4-Life BMW-4-Life is offline
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With the car jacked up, there's no load on the front wheels - so the belt won't have to deliver much torque ... so it won't slip.

When you fit the replacement motor, you should tension the belt by placing a bit of leverage to move the motor away from the rack.

I'd be interested to see what results you get with eSys.

How did the damage to the motor occur ?
Would there have been damage to the rack too ... because that would place an extra torque burden on the motor, possibly resulting in belt slippage.
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  #8  
Old 03-19-2018, 01:10 AM
BMW-4-Life BMW-4-Life is offline
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What happens if you hook up the connection to the old motor (without fitting it) and ask ISTA-P to code it ?

Seems that it's just not seeing the new motor's ECU for whatever reason.

Last edited by BMW-4-Life; 03-19-2018 at 01:11 AM.
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  #9  
Old 03-19-2018, 10:50 AM
rogaa rogaa is offline
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I've done the same thing on my F20 BMW.

You should use e-sys to code the used EPS steering rack! Just connect > read FA > Activate FA > Read ECU > Find EPS ECU > Rightclick on EPS and use "DETECT CAF FOR SWE" and choose CAFD matching your i-level. > Then VO code EPS and it should work right away.
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Old 04-04-2018, 09:49 PM
EvolutionTME EvolutionTME is offline
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Problem solved.. different sized gearing on the motors..

Decided to put the motor back in the original replacement rack and change the whole lot over. Works perfectly now. Thanks for your assistance everyone and BMW-4-Life
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  #11  
Old 04-05-2018, 12:10 AM
BMW-4-Life BMW-4-Life is offline
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  #12  
Old 11-24-2019, 06:33 PM
KleinyME KleinyME is offline
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Hoping this solves my issue. my steering is making terrible noises after I swapped just the motor too.
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coding, eps, learning, programming, relearn, steering


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