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BMW E46 2004 - Steering angle sensor, code 5E43 - Fixed #

Posted by Martin Kelly on January 30, 2018, 10:29 am

Year of Manufacture *: 2004
( Optional ) Engine Code or CC: 256S5

Verus scanner
ATE MK 60 ABS/DSC system

Hi, in ABS/DSC car has logged DTC 5E43 Steering angle sensor, internal.
Live data showed it stuck at -3.8°, tried reset procedure a number of times without success.
Have replaced steering angle sensor and fault remains as before.
I have since noticed that there is a separate Steering Angle Sensor (LWS) system, the same DTC is logged but this clears and the live data is reading correctly.

The steering angle sensor has 6 wires, 2 for CAN and 1 to the ABS/DSC control unit, Autodata does not show the other 2 wires on any wiring diagram.
When viewing the data etc via LWS am I seeing it through the CAN network?
So when looking at it through ABS/DSC and it is stuck data and won't re-align could this point to a faulty ABS/DSC control unit?

Any help would be appreciated.

Thanks, Martin.

Re: BMW E46 - Steering angle sensor

Posted by Simon Kefford <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3159' width='330' height='300' border=0 style='border:none;'> on January 31, 2018, 10:34 pm, in reply to "BMW E46 - Steering angle sensor"
Simon Kefford

Hi Martin,

From memory - your ABS is complaining about not getting the data from the SAS. This will be on the HS can. Scope the can at ABS and SAS.

Pins 1 and 2 NVB fused 3 and 4 Can. Pin 6 have a look at signal to ABS via Dash MFCU glove box and DLC - 5 is ground.

The only other nodes on this is PCM and TCM and they're probably not concerned with the info so not flagging faults.

Have you done calibration/adaption on new SAS in ABS/DSC?

Note:
Steering angle sensor adjustment must be carried out:
Before adjustment work on the front axle/steering
after all mechanical work on the steering system
E46 (all-wheel drive), E53, E83: after disconnecting the battery
after replacement / coding / programming of the following components:
Fixture for switches of steering column / switch cluster / steering angle sensor
Dynamic Stability Control (DSC) control unit
Control unit active anti-roll stabilization (ARS)

Global scan to be sure no other can complaints.

General state of the car and "add-ons"

Hope this is of help. - you really need wiring diagrams.

S

Re: BMW E46 - Steering angle sensor

Posted by Martin Kelly <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT2863' width='330' height='300' border=0 style='border:none;'> on February 1, 2018, 8:22 am, in reply to "Re: BMW E46 - Steering angle sensor"

Thanks for the info Simon, much appreciated, Martin.

Re: BMW E46 - Steering angle sensor

Posted by Martin Kelly <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT2863' width='330' height='300' border=0 style='border:none;'> on February 6, 2018, 9:15 pm, in reply to "Re: BMW E46 - Steering angle sensor"

Simon, found that the NBV +30 on pin 1 of the SAS was zero, fuse had been removed, now ok.
SAS pin 2 +15 Ig. on ok, scoped CAN at SAS and ABS and both good.
Scoped the signal, SAS pin 6, at pin 8 of the DLC and at pin 2 of ABS and have got 10.28v at both.
I'm not sure what type of signal I am expecting to see but constant 10.28v doesn't seem right?
Will check SAS pin 5 ground next.

Also, have noticed that when communicating with the ABS the DSC light is on but not the ABS light, odd?

Thanks, Martin.

Re: BMW E46 - Steering angle sensor

Posted by Simon Kefford <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3159' width='330' height='300' border=0 style='border:none;'> on February 7, 2018, 8:57 pm, in reply to "Re: BMW E46 - Steering angle sensor"
Simon Kefford

This may help

https://www.knowyourparts.com/technical-resources/suspension/steering-angle-sensor-diagnostics/

https://www.knowyourparts.com/technical-resources/electrical/steering-angle-sensor-basics/

I can't really offer much more advice

Si

Re: BMW E46 - Steering angle sensor

Posted by Martin Kelly <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT2863' width='330' height='300' border=0 style='border:none;'> on February 9, 2018, 10:17 am, in reply to "Re: BMW E46 - Steering angle sensor"
Martin Kelly

Many thanks Simon, I'll post fix when I get there.

Martin.

Fixed #

Posted by Martin Kelly on February 24, 2018, 1:20 pm, in reply to "Re: BMW E46 - Steering angle sensor"
Edited by board administrator March 1, 2018, 12:13 pm

It turns out that the new SAS has to be coded in, had someone locally who did that, all ok now.

Thanks for your help, Martin.

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