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Lateral acceleration sensor

25K views 60 replies 8 participants last post by  MMatty95  
#1 ·
Hi! Recently the BAS/ESP light came on in my 2001 320. The code showed that the lateral acceleration sensor is bad so I bought a checked used one. This made the light go away for a while and then came back with the same error. Cleaned the connection with drying contact cleaner and then put copper paste on the pins. The light went and came back again after a while. Bought an iCarsoft reader and ran some live tests (results in pic) while standing still at my driveway. What I noticed is that the yaw sensor is showing crazy values as well but it doesn't have any fault codes. Could it be caused by some contact issues at the lateral acc. sensor or should I investigate somewhere else? While doing the tests I sometimes managed to get the lateral sensor show values around 0 and that made the light go away so that is promising.
571178
 
#2 ·
Hi,

You have to Calibrate both G Sensors, not just plug and play.

I do not know if your iCarsoft will support this function, but certainly SDS does as I've done several now.

We did this to death on a recent thread on this forum, have a search about ;)

HTH,
 
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#4 ·
Please report back if iCs actually will activate the Calibration procedure, if you can't find it then it won't and you will need SDS ;)
 
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#8 ·
Hey! So I just checked the iCarsoft and it does have something that I suppose is the calibration procedure. (See pictures) One of its preconditions is replacing the lateral acceleration sensor. Tried it in my street but couldn't do it properly due to lack space (Will have to find an empty parking lot:D). Can you please confirm it is in fact the calibration procedure?
 

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#5 ·
Oh btw, the reason you see some guys (who don't know any better) tell you things are plug and play is because some sensors will be close to the original sensors values, so won't pop a fault code, but even then, their system will not be working at it's best.

It is the same with module replacements, most Modules will always require their "Version Coding" at least checking with SDS, and then corrected if needs be ;)
 
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#7 ·
The only thing I've replaced so far that didn't need to be calibrated was the ABS Module and the N10-3
Hi,

Were their any Version Codings in ABS / ESP and perhaps N10/3 although I'm not actually sure if N10/3 is a communicating Module ??

I'm only asking because I've never delved into either, but if I replaced one I'd certainly plug SDS in just to have a look see ;)
 
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#9 ·
Yes buddy, that is it, I always try to find an empty Industrial Estate Car Park out of business hours :)

I have problems right now, so if you need any further advice feel free to pm me or better still email footerbare@btinternet.com :)
 
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#11 ·
Hi! Did the road test today with no success so I compared iC's instructions with the STAR bulletin. I'm pretty sure I did something wrong. Will have to come back to it during the weekend.

Matty
 
#12 ·
Hi Matty,

Did the ABS / ESP Lights go out at any time whilst you were doing the procedure ?

If so that is the indication that the procedure has completed successfully, and then if they subsequently come on shortly after then there is likely another fault ............

Perhaps the Sensor you got is dodgy ?
Are you certain that you changed the correct G Sensor ? .........

They are both very close to each other under the Centre Console behind Shifter ;)

TBH in the past I have tried doing this procedure on 2 different expensive "professional grade" Generic Machines that I own, (Snap On and Autel Ultra Pro), without success, but it always works for me when using SDS ;)

HTH,
 
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#13 ·
Hey Dave,

Only the ABS light went out the ESP always stayed on. Once I managed to delete the ESP fault code with the scanner after the test, that made the light go away (and the sensor showed correct values) but came back when I would restart the car. With the same fault code: C1142-001

I'm sure I changed the lateral acceleration sensor (the smaller, cubical looking). I'm considering putting back the previous one (maybe someone changed it before me and forgot to calibrate it:unsure:) to see what values it shows.

Anyways if I don't succeed might have to contact a MB mechanic to check it out.

Thanks!
Matty
 
#14 ·
Hi Matty,

They are definitely a "problematical part", perhaps consider buying another, a good used one from a decent breakers, you certainly know what you are doing here, and certainly know more than local garages near me, I'd stick with it if I were you ;) .............

Here is a spare one I just photo'd, this is what it looks like :-



HTH,
 
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#15 ·
Hey,

Yeah that's the one I changed. Will run one more round with it once I get back from work for the weekend. Hopefully I can fix it but luckily these are not too expensive sensors. I do have trust issues with small garages as well:LOL:

Thanks!
Matty
 
#16 ·
I do have trust issues with small garages as well:LOL:
Hi Matty,

Except mine of course :D ?

Lol I know what you're saying :)
Some of the bigger ones, especially main agents and chains are actually a bigger minefield too ;)
Some of them aren't being dishonest, they are just clueless, more so with MB's because they are always ahead of other cars and also do things differently to other mfrs ;)

But then that is one of the reasons I started this Business up a few years back, I got fed up with seeing and hearing all the tales of woe from local friends etc, and (without any advertising) it just got busier and busier, all word of mouth which works especially well in a smaller community like ours ;)

I never buy them new from MB, same with Modules, I just find an EBay breaker with good reputation, I don't buy used parts from EBay privates, the parts have often been removed for a reason ;)

If you were nearer I'd let you borrow this one for testing, but it is currently the only spare one I have ;)

Let us know how you get on ;)
 
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#17 ·
Hey Dave,

Yeah except yours :LOL: TBH I don't know any reputable garages in my 50km area (might be a good idea to start one:unsure:)

Yeah I usually order from eBay as well. Not many people break SLKs in Hungary (or even own one) so finding parts locally is almost impossible and sometimes more expensive than ordering one from abroad.

Thanks for the offer but I'll give this sensor one more chance and maybe try the old one. Will keep this thread updated once I get back home. ;)

Matty
 
#18 ·
Hey Dave,

Yeah except yours :LOL: TBH I don't know any reputable garages in my 50km area (might be a good idea to start one:unsure:)

Yeah I usually order from eBay as well. Not many people break SLKs in Hungary (or even own one) so finding parts locally is almost impossible and sometimes more expensive than ordering one from abroad.

Thanks for the offer but I'll give this sensor one more chance and maybe try the old one. Will keep this thread updated once I get back home. ;)

Matty
You might find Germany a better hunting ground.
Even UK users look there at times.
German ebay has been fruitful.

There is a German MB forum (I forget name)
 
#24 ·
I must admit I only use Dronsfield if no one else has got a part ...........

The "Mercedes Tax" can be a bit high ;)

There are a few London way who are good Indie MB Breakers, and also the Eastern Europeans are very honest and have all sorts of good and hard to get parts stashed away, like the Powerfold R170 Mirrors and Switch I bought recently ;)
 
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#27 ·
Aya Dave, I totally argree, but must say that looking on my missus fb motors for sale, there's a gold mine of goodies, as soon as I brought my 98 slk lovely, I had to get some alloys, after a few minutes of wailing through post n general tosh I found this guy who was breaking an 2001 slk230 and brought them to refurb, and to my surprise he gave me ÂŁ300worth of dash and center console with all the switches really cool so I sent them off too get flax pau leatherette to cover all that rubbish paint that mercedes want you to cough up ÂŁ20 odd to dab on as soon as ya done it ya leg rubs it off so that was pants so ill wait till its all done can't wait to see it all..
 
#29 ·
Hello!

Just arrived back from calibrating the sensor (the one I bought). It looks like I have succeeded but I have some doubts. The first few times were a failure but at one point the ABS light went out (along with the warning triangle) but the BAS/ESP stayed. I hooked the scanner on the car and the fault code became 'historic' and the lateral acc readings were normal. After deleting the code and restarting the car the light was off so I drove about 50kms (with top down:love:) and everything seemed alright. Got home, restarted the car once more, still no fault on the dashboard or in the scanner.
One thing I noticed: the yaw sensor is still all around the place. It might be bad as well?:unsure:
Anyways will keep an eye on it throughout the weekend to see if anything comes back before I start to celebrate.

Thanks for all the help,

Matty
 
#30 ·
Hello!

Just arrived back from calibrating the sensor (the one I bought). It looks like I have succeeded but I have some doubts. The first few times were a failure but at one point the ABS light went out (along with the warning triangle) but the BAS/ESP stayed. I hooked the scanner on the car and the fault code became 'historic' and the lateral acc readings were normal. After deleting the code and restarting the car the light was off so I drove about 50kms (with top down:love:) and everything seemed alright. Got home, restarted the car once more, still no fault on the dashboard or in the scanner.
One thing I noticed: the yaw sensor is still all around the place. It might be bad as well?:unsure:
Anyways will keep an eye on it throughout the weekend to see if anything comes back before I start to celebrate.

Aya matty, was just browsing ya post, and what the feck is a yaw sensor do when it's not even on my many to do list of electrical parts, as have only had my slk for just over month now and I don't care if its got problems it's all sortable, so wtf is a yaw, please enlighten me!!, slk98
 
#34 ·
I never knew my pocket would suffer as much as I budgeted
Too replace the wings I have from the fatherland it's definitely taking a beating I mean I do want my slk looking as good the day it left the factory ahhh memories :cool:
 
#36 ·
Too replace the wings I have from the fatherland it's definitely taking a beating I mean I do want my slk looking as good the day it left the factory ahhh memories
Try here :-


I will be replacing my right front Wing (Fender) next year and I will simply weld a small patch inside the Indicator Repeater hole and filler before paintwork, I've seen the price of post Facelift Wings from MB ? (and I get a hefty "Trade Account Holders" discount) ;)

HTH,
 
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#35 ·
As for the electronics it's something that needs to be looked at as the alarm has never gone off and I can see parts of the wiring has been disturbed my main concerns was the ignition switches so upon dismantle the switch was lack a d smelled of overheated and a melted junction box halalooya so ÂŁ200 later and a box of tricks later alls well everything working as should coz some things weren't now all is cool this because someone decided to bypassing the fuel pump heck that was fun leaking pump didn't help either so instead of secondhand one I brought a new one Bang goes the budget but now it no smells of fuel cool hydraulic pump topped up alls well and the answer to the lateral acc sensor yep an auto spark guy who lives 2 doors away done it for a few beers so now like I said previously it's all about the bodywork and alloys
 
#37 ·
Cool thanks but I had the doshola when my mother passed away a 2 years ago and it wasn't very much money either but helped me get this slk which I love so I saved a few beans and went shopping I got the wings at the right time as they are now 350 for the pair I got them for 280 free post and the side repeaters plus the weather seal strips and the sealant which is grey and a screwdriver with rubber greese just need a decent day of sunshine and no nipple showing off from the misuss
 
#39 ·
You've got a workshop that Interesting is it located near the southwest of England pray tell otherwise I gotta rent a bay for a day OK ya get use of some air tools but ya gotta bring ya own tools which is an issue coz the boot ain't big enough so I gotta plan it with least amount of tools and other stuff
 
#40 ·
NW Scotland, and I don't rent it out ;)
 
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#41 ·
Cool not for me though there are places about down here in the sunny southwest not that is is sunny right now I think I saw the sun a few days ago maybe I was in a diabetic shock lol
But yeah have used a place here several times and it's got cheaper as am in an out of there pending parts delivery keeps me out of the elements cool stuff
 
#42 ·
Hello,
Interesting things happened today. When I started the car the mighty BAS/ESP light was on. Read the code, of course it's the lateral acc sensor. Quickly changed it to the original one that was bad initially. Went to calibrate it. Couldn't do it. Went home changed the sensor again. Calibrated it successfully on the first try (all lights went out). No code in the iC.

What's more interesting is the yaw sensor reading. Previously it was between 90-140°/s now it's 2-40°/s (while standing still)

I have a feeling this is not over yet. :D
Will check on it again during the weekend and report back

Matty
 
#43 ·
Hello,
Interesting things happened today. When I started the car the mighty BAS/ESP light was on. Read the code, of course it's the lateral acc sensor. Quickly changed it to the original one that was bad initially. Went to calibrate it. Couldn't do it. Went home changed the sensor again. Calibrated it successfully on the first try (all lights went out). No code in the iC.

What's more interesting is the yaw sensor reading. Previously it was between 90-140°/s now it's 2-40°/s (while standing still)

I have a feeling this is not over yet. :D
Will check on it again during the weekend and report back

Matty
As it happens a friend of a friend went to the bath n weston Showground and behold brought a Mercedes benz default code reader and pinpoit the sensor to replace it cool tech am waiting meself in anticipation as of Saturday there coming over, yeah to just add we went out to NHS and basically the car stalled over the bridge which was amusing a kind van driver helping me push car into a taxi rank busy morning high foot work area wasn't happy called Green flag an hour an 20 later a young pup turned up I asked ya know anything about mercedes slk's nope not a clue but amazing thing happened 10mis before he turned up ya guessed it slk started so I told him to follow me home list him got home and so I wait now.
 
#44 ·
Well well Boris the doof jug head wants to ban petrol by 2035 so what's it gonna mean for those of us who have classic slk's or classic cars full stop yessh I would hate to think how much it would cost to convert to an electric motor holy climate change but I think cars don't give out as much as planes can have it till 2050 which is a load of tosh masses of industrial companies that pump out thousand of tons of pullution so here's my plan get as much enjoyment out of ya slk as ya can and deal with future when it's here hopefully an all electric slk AMG I'll have one in a second... ?
 
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