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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 01-03-2011, 01:18 PM
Scorps Scorps is offline
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Mein Auto: 1998 540i w/Sport package
E39 Steereing Angle Sensor HELP

Hi there all,

I have the dsc light come on every time I restart and drive for about 20-50 yards. Took it to my friends shop and plugged the a Snap-on Solus Pro to scan it, and it returned left front speed sensor and steering angle sensor. We jacked the car and turned the wheel to read its functionality on the scanner it works just fine it reads the Km/H so thats fine erased all codes and the problem is the steering wheel sensor, it reads -1434 which I dont know what it refers but turn the steering wheel one side to the other and no different read, still -1434, which logics says it is not functioning if it was ok the scanner would read actual position when turning. But my question is the following could it be posible that it may need recalibration or fully replace is needed?

Or is there any other way to test its functionality?
By the way I got the car last week.

2000 E39 540i with 20" wheels
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  #2  
Old 01-03-2011, 01:38 PM
Mark@EAC Mark@EAC is offline
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if the scanner is reading live data the steer angle value should change when the steering wheel is turned. If its not sending data the sensor needs to be replaced and then coded/calibrated.
http://eactuning.com/parts/product_details/32306793632

try to have him code and calibrate your existing one, if that does not work replace it.
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  #3  
Old 01-03-2011, 03:21 PM
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bluebee bluebee is offline
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Quote:
Originally Posted by Scorps View Post
Or is there any other way to test its functionality?
There is an excellent PDF of the entire sensing system and how to test the voltages of each of the 20-odd sensors in this system over here ...
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  #4  
Old 01-03-2011, 08:53 PM
Scorps Scorps is offline
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I would have my friend try to recalibrate and code the actual sensor, since I dont know much of previous owner I dont know if they replaced any modules as it mentions on the pdf bluebee posted. I would keep you guys posted of what results are. Thanks for your fast response.
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  #5  
Old 01-04-2011, 08:24 PM
Scorps Scorps is offline
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Hey Mark,

I had my friend code and recalibrate the sensor and problem solved, DSC is working perfectly now. I appreciate your help.
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  #6  
Old 03-09-2011, 02:21 PM
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BigCo540i BigCo540i is offline
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Quote:
Originally Posted by Scorps View Post
Hey Mark,

I had my friend code and recalibrate the sensor and problem solved, DSC is working perfectly now. I appreciate your help.
What type of scanner or tool do i need to re calibrate the steering sensor?
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  #7  
Old 03-09-2011, 04:59 PM
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champaign777 champaign777 is offline
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Gt1
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  #8  
Old 03-09-2011, 07:28 PM
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BigCo540i BigCo540i is offline
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$1100?
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  #9  
Old 03-09-2011, 07:48 PM
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bluebee bluebee is offline
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You might want to team up with BigCo540i who is working on calibrating one or all three of his steering angle sensors over in this thread ...
- Sometimes you have to bit the bullet and take it to an Inde-
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  #10  
Old 03-10-2011, 05:31 AM
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BigCo540i BigCo540i is offline
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Quote:
Originally Posted by Mark@EACTuning View Post
if the scanner is reading live data the steer angle value should change when the steering wheel is turned. If its not sending data the sensor needs to be replaced and then coded/calibrated.
http://eactuning.com/parts/product_details/32306793632

try to have him code and calibrate your existing one, if that does not work replace it.
Mark, do you have the GT1 equipment available for a small fee?
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  #11  
Old 04-01-2011, 06:53 PM
Ironnerd Ironnerd is offline
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I have the DSC light on and had my local indy shop check the codes - sure enough it is the steering angle sensor. Then my indy mechanic says that he can't calibrate and I will need to take it to the dealer (aka stealer) for calibration. Can recal be done with the code reader tool? Anyone have a write-up? I tried turning the steering wheel lock to lock, but no reset after three drives. The sensor my need replacing, but I would rather try a reset/recal before dropping $300 on a new sensor. Thank you for any guidance!!
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  #12  
Old 04-01-2011, 07:43 PM
Jimmys 530i Jimmys 530i is offline
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Quote:
Originally Posted by Ironnerd View Post
I have the DSC light on and had my local indy shop check the codes - sure enough it is the steering angle sensor. Then my indy mechanic says that he can't calibrate and I will need to take it to the dealer (aka stealer) for calibration. Can recal be done with the code reader tool? Anyone have a write-up? I tried turning the steering wheel lock to lock, but no reset after three drives. The sensor my need replacing, but I would rather try a reset/recal before dropping $300 on a new sensor. Thank you for any guidance!!
It is possible to realign the steering angle sensor with a scanner other than the GT-1. I have done this many times with my Launch X-431. A regular code reader will not be able to realign the sensor, but a good diagnostic scanner will be able to.
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  #13  
Old 04-01-2011, 11:26 PM
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bluebee bluebee is offline
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Originally Posted by Jimmys 530i View Post
I have done this many times with my Launch X-431
This is interesting and new enough information to warrant adding a reference so that a quick /steerng angle sensor(F3) in the VERY best of E39 Links will find your ideas more efficiently (see red below):

- All about DSC (1-pdf) (2-pdf) & comparisons to ASC+T (1) & how to diagnose & fix the amber ABS DSC (or ASC) BRAKE trifecta (1) or the amber ABS DSC (or ASC) bifecta (1) (2) (3) (4) (5) (6) (7) or just the DSC light (1) & what is the ABS control module testing pinout for the older E39s (1) & what is the logic of ABS diagnostics (1) (2) (3) (4) (5) (6) & how to test the brake pressure sensor (1) & how to autopsy & fix your Bosch ABS control module yourself for free (1) (2) & what anomalies occur while the ABS control module is out of your vehicle for repair (1) (2) (3) & how to replace wheel speed sensors (1) (2) & why you want OEM wheel speed sensors (1) & what happens if you don't code your VIN into a new/salvage ABS control module (1) & how to test (and align) your E39 DSC steering wheel sensors (1) (2) (3) (4) (5) (6) & how to turn off DSC traction control (1) (2).
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  #14  
Old 04-02-2011, 08:47 AM
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champaign777 champaign777 is offline
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Originally Posted by BigCo540i View Post
$1100?
if you willing to drive to me i will fix it for you for free
will cost you maybe 50$ for gas

Last edited by champaign777; 04-02-2011 at 08:51 AM.
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  #15  
Old 04-02-2011, 08:54 AM
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champaign777 champaign777 is offline
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Quote:
Originally Posted by Ironnerd View Post
I have the DSC light on and had my local indy shop check the codes - sure enough it is the steering angle sensor. Then my indy mechanic says that he can't calibrate and I will need to take it to the dealer (aka stealer) for calibration. Can recal be done with the code reader tool? Anyone have a write-up? I tried turning the steering wheel lock to lock, but no reset after three drives. The sensor my need replacing, but I would rather try a reset/recal before dropping $300 on a new sensor. Thank you for any guidance!!
there is no write up for SAS
this will give you an idea
http://forums.bimmerforums.com/forum....php?t=1395250

Last edited by champaign777; 04-02-2011 at 09:30 AM.
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