DSC Internal Sensor?

[SlickGT1]

Congradulations. I am glad you got it all done. So no more errors? Scan and reset with GT1, I am sure the fault will still be there.

Also a suggestion for anyone reading. This tool has saved my knuckles countless times. I recommend everyone have at least the straight one. I have ones that are bent also. A screw gun driver will fit, and make an extension for you. You can basically put any bit into it and you have a ratchet drive screw driver.

9-41469 Craftsman Screwdriver Set, Reversible Offset Ratchet 5pc

[TwinsPoppa]

Originally Posted by SlickGT1

Congradulations. I am glad you got it all done. So no more errors? Scan and reset with GT1, I am sure the fault will still be there.

Also a suggestion for anyone reading. This tool has saved my knuckles countless times. I recommend everyone have at least the straight one. I have ones that are bent also. A screw gun driver will fit, and make an extension for you. You can basically put any bit into it and you have a ratchet drive screw driver.

9-41469 Craftsman Screwdriver Set, Reversible Offset Ratchet 5pc

I updated the first post with the results. After replacing the sensor the warning light and SLS Inactive message both went away.

In GT1 CANbus error (SLS inactive) was not present anywhere. The DSC sensor error showed up in the first screen after a Short Test - but DSC module does not show having an error on the screen where you delete faults.

If I run a test plan on the DSC error it proceeds to read the DSC module and says no fault read. If you run the short test, DSC module does NOT show an "X" indicating a problem in that module.

I will try and clear it by turning/on off between deletes and/or try to find something in the function mode. Maybe its one of those errors that stay because its a clone GT1 - like that stupid BD fault (Brake Force distribution) that always shows but I cannot clear it and I have no way of clearing or even have a test plan.

There's a screen where it will show readings of the DSC sensor (rotation-rate) but I couldn't remember where I found it. I'll go back and look some other time.

I was to eager to get done and stop from being eaten alive by the mosquitos!

BTW .. you can bet that I did NOT completely tighten the hard to get to screw. I just threaded it in enough to stay in place and fuggetboutit!

[SlickGT1]

Originally Posted by TwinsPoppa

I updated the first post with the results. After replacing the sensor the warning light and SLS Inactive message both went away.

In GT1 CANbus error (SLS inactive) was not present anywhere. The DSC sensor error showed up in the first screen after a Short Test - but DSC module does not show having an error on the screen where you delete faults.

If I run a test plan on the DSC error it proceeds to read the DSC module and says no fault read. If you run the short test, DSC module does NOT show an "X" indicating a problem in that module.

I will try and clear it by turning/on off between deletes and/or try to find something in the function mode. Maybe its one of those errors that stay because its a clone GT1 - like that stupid BD fault (Brake Force distribution) that always shows but I cannot clear it and I have no way of clearing or even have a test plan.

There's a screen where it will show readings of the DSC sensor (rotation-rate) but I couldn't remember where I found it. I'll go back and look some other time.

I was to eager to get done and stop from being eaten alive by the mosquitos!

BTW .. you can bet that I did NOT completely tighten the hard to get to screw. I just threaded it in enough to stay in place and fuggetboutit!

Fugghetaboutit. LOL. You know there is a sign when entering Brooklyn from NYC, it says, Welcome to Brooklyn, Fugghetaboutit. lol.

[X3-terrestrial]

Originally Posted by TwinsPoppa

Well, Craig says that exact part has been discontinued. The new replacement part is $60 more so now its $350 total.

WOW, they sure went up since last year! I just paid $487 + tax for the same part for my 2005 X3! And that was with my BMWCCA discount!

[HEISING]

Tighten the screw properly or the box will warp.

[Alika808]

Originally Posted by TwinsPoppa

The DSC/xDrive (4x4) light came on and its a solid yellow. I also get the SLS Inactive message on the Check Control Alphanumeric Display.



Tried pressing the DSC button on the console to turn the DSC light off - no change.

Pulled, checked and re-installed fuses in the back and glove compartment - no change.

BTW ... there's a 30amp fuse in the back panel, looking at the panel its the last one all the way to the right, that only has one connector on the female side - unlike the others which have two. I think I found another one IIRC that was marked "trailer socket" and it also had one connector in the fuse block. Weird.

Anyways, scanned it with the GT1. Got a "5F0C DSC sensor, internal" fault in memory that was not selectable or deletable.


Went through the Test plan and got these screens.


Based on those screens, I interpret it as the internal sensor fault was found in the DSC module not a separate sensor that could be replaced.

So, before I buy a DSC module I want to see what the forum has to say.

The external sensors are a Brake Pressure sensor, (Four) Wheel Speed sensors, (Two) Rotation Rate sensors, and a Steering Angle sensor. There's also a DSC Hydraulic unit but it doesn't seem to be related to any of these at first glance.

Maybe I should disconnect the battery for about 1hr and see if that helps.

SOLUTION:
Replace Rotation Rate (yaw) sensor under the center console. Old sensor (discontinued) on the left and made in Germany. New sensor on the right and made in Hungary. After replacement, the DSC/xDrive (4x4) light and SLS Inactive message went away. I did not have to code/program anything.

I know this is old thread but I hope you guys can give more input above issue. 2005 X5 3.0, have the same issue as above. I replaced the rotation rate sensor and wheel angle sensor, the fault still
there. I read few thread about to calibrate the wheel angle sensor after installing a new. By the way, I don't have calibration tools and the dealer charging $150.00 to calibrate. I appreciate for all input.

[X5monsterBMW]

Well - with the help of the above pics I just changed my Lateral Acceleration Sensor - same part no. as in above pics. Thank you for great pictures !
4x4 warning yellow warning had come on and the usual SLS suspension inactive
I had code 5F08 (Lateral Acceleration Sensor Plausibility)
And as a result
0032 (Can bus coms) on the air suspension - apparently the SLS de-activates when the 'Lateral' module dies.
BMW wanted £380 + VAT for the part (£468)....... no chance of that - so I bought a guaranteed one from e-bay £39
Fitted myself - however I would just like to say, this is horrible job. Never want to go there again
Anyway - 3 hours later the job is done - the moment I plugged up the replacement the code disappeared (4x4 warning went out) & SLS re-activated.
Great result but not much fun!
Best Malc

[Prospect25]

Hi All,

Longtime lurker and first time poster; don't flame me too hard

I have a 2001 4.4 X5 Neiman Marcus Edition with just over 75k miles. Car runs great but i have been chasing after an issue for about three months with no results yet.

The speedometer will intermittenlty shut off and the Brake, ABS, and DSC lights come on. Most of the time this is caused by the left rear wheel speed sensor.

Not having a scanning tool like i did with my Audi (VAG-COM), i took it to a local indy shop with good reviews. The indy shop installed a new wheel speed senor and the fault returned. I found out later they installed the wrong part number, more on that later. Since the fault returned, they tried to repack the wheel bearing as well as installing and subsequently unistalled a new ABS module and instrument cluster as neither of those changed the fault from returning.

The indy shop was baffled and surrendered the car back to me. When i picked the vehicle up, the ABS system was going nuts and i wasn't even able to drive the car around the block since the ABS system kept kicking in with the wrong part installed. I had the car flatbedded to a BMW dealership in hopes they could get to the bottom of the issue.

They didn't. First time the vehicle went in they informed me the wrong part was installed as their was a model split and the correct part (34-52-6-756-380) would remedy the error. New part installed, the techs were satisfied and i picked up the vehicle. No less than 24 hours later, the symptoms of speedo, ABS, DSC, and Brake lights returned. I spoke with the service manager and he said to bring it back and they'll re-inspect.

Upon the second trip to the BMW dealership, they believed that a stripped hole where the wheel speed sensor attaches to the bearing was causing the sensor to rattle under operation and cause an intermittent signal failure. A new wheel hub was installed and the fault returned once more, this time with the addition of the SLS Inactive light.

I spoke with the shop foreman this time and he said he tried swapping the wheel speed sensors on the back two wheels and the fault didn't follow the newly installed part but stayed at the left rear wheel. He informed me he also checked all the wiring and used a multimeter to check the voltage, which were all within normal parameters when he cleared the vehicles faults.

In speaking with the foreman and service manager, they said they felt "95% sure" that the real cause is the DSC Control Unit and the Control Unit for the ride height sensors as a new ride height sensor didn't remedy the SLS light. All said in done, i was quoted another $4,000 in addition to the $1,200 i spent for the new sensor and wheel hub. They gave me a list of faults, which are as follows:

00008C DME: Activation, map cooling
00001E DSC: Wheel-speed sensor, rear left, transmits no signal
0000BD IKE: Electronic brake-force distribution
000001 EHC: Ride-level sensor, left
000028 LCM: Light check module: fault stored
S 0002 No communication possible with: Slide/tilt sunroof
S 0039 No communication with: Cruise control

The new DSC part the dealer gave me is 34-52-2-285-045 and the Ride Height Level Control Unit is 37-14-6-874-414.

I have spent about $4k on the car in the last six months, some routine maintanence and the rest on this back and forth with the dealer, so i'm trying to determine what's next for our relationship. The easiest thing would be to get rid of it as-is and never look back. However, I'm hard-headed and want to see if this issue really is the straw that broke the camels back financially or if there is something i'm missing, like a DSC/ABS rebuild or yaw sensor. It could be the first shop had the right idea with the ABS sensor but the wrong wheel speed sensor wouldn't let the two work together correctly; hoping y'all can help me find out.

Sorry for the book, but figured i'd give all the details i have to this point. Thank you in advance!

[X5monsterBMW]

Hi Prospect25 - sounds like a right can of worms!
This one might be a bit out of my league...
I am a bit like you i.e. when I had on-going problems it was tempting to let the beast go - however, in my case the perseverance paid off - I hope it does for you - I hate to give up eh!
Having had the YAW failure (Lateral Acceleration Sensor) failure, this does not sound like that!
Pls don't take my word for it but I also do not think that it is the Ride Height Level Control Unit - this may be locked out as a result of the root fault.
The thing I do not understand here, is why on replacement of the Rear Left Wheel Sensor (or even swapping it with the right) still shows the same fault code.
This could point to the DSC Control module - are you in USA?? Over here in UK there is a couple of workshops that can test (if removed of course) the DSC/ABS & re-build if req'd for a flat fee fraction of the new cost.
Back to yours - there are lots of bits connected to the DSC (YAW, Streering angle Sensor, Wheel Spd sens, AGS - gearbox control) to name just a few not to mention 4 or 5 gadgets on the can-bus!
Is there somewhere you can get the DSC checked out as this rear wheel thing sounds inconsistent?
This is probably a really stupid question - but is your battery good on volts? My battery went low at one point and it caused havoc with loads of systems in the car... just checking!
I used to work in industrial electronics (Audio & A/V now) and I have to say some of these auto electrical faults drive me nuts!
Let us know how you get on!
I would be interested to see what the others on here write - there are some great guys on here who understand this stuff back to front!
Attached is a pic - hopefully attached - may not be the same as yours but gives you an idea of what is connected.
V best malc

[Prospect25]

Malc,

Thanks for your thoughtful response. I personally haven't checked the volts on the battery, but will certainly do that as a first check! I imagine both the indy shop and dealership would have done so, but you know what they say about assumptions....

Reading through a few threads I also think the root issue, likely DSC, is causing the SLS inactive light to come on as well, so will take it one step at a time. Your diagram of all the components that tie into the DSC is a bit, well, intimidating! But when broken down into each individual component seems very straight forward.

I am in the USA and have seen a few threads who have used shops to repair and return their modules. MyAirBags.com has a repair and return service for $169 and offers 24 hour turn-around. However, I can't find a DIY removal and reinstall writeup for the life of me! If i could, i think i would give this a shot as it's cheaper than the alternatives of losing a few thousand on selling it or giving the dealership a few thousand to throw parts at it.

Open to any and all suggestions on what else to investigate based on the fault codes from the vehicle.

Thanks all!!
AJ