just finished removing rear right caliper and carrier to give it a clean up relube etc due to being hot on both rears (hotter than expected)
anyway after a bit of trouble getting the caliper to rewind and then pumping back out to rewind a few times to check free.
i stupidly broke my old rule of if it aint broke dont fix it , but there looked to be a build up of crud on the wheel speed sensor ring so gave it a gentle scrape with screwdriver to clean crap off(no scratching).
all rebuilt and on test drive abs failure popped up , luckily have fes and green plug so cleared fault and for referance my stilo jtd 16v 150hp is bosch abs 8.
read code as rear right wheel speed ok stripped again and this time with a brush and a spray bettle cleared all round the ring and the sensor, good enough to see it looks like greyish magnetic ring.
rebuilt and tested again and abs popped up again but now nothing showing in fes but only tested on drive for sensors working.
all wheel speeds are reading and look close enough to me see a very small drop in right rear hoping a few days of driving will settle and clear.
there appears to be no relearn for these sensors ?

sussexa said:

there appears to be no relearn for these sensors ?

Click to expand...

The sensors are just pulse generators, so there's no need for a relearn. They either work or they don't. Looks like yours are working.

BTW. There's a new version 4.2 of MES available. http://www.multiecuscan.net/
.

thanks for the reply i will do the update not needed it for ages now.
also dont know why it instantly comes back on dash abs but shows no fault logged , might need a higher speed to log one.

as suspected the fault re triggered and abs popped back on dash when got a bit more speed into it on the road.
could be a worth while note , as I can see how a garage could look into it clear the fault and send you on your way again only for it to pop up again down the road.

anything else i could have messed up winding calipers back ?
i did the other side caliper today and went a little easier so had time to look at airgap sensor to ring , was about 1mm when cleaned all crap off again.
so with this in mind i checked original fault as i do remember fitting a wheel bolt to hold disc on when checking stuff and seem to remember it not turning so starting to thing it may have been bolt hitting sensor.
anyway checked airgap and was a lot smaller so pried up gently to about 1mm.
i did batt disconnect for an hour to see if a hard reset cleared anything.
reconnected batt and started it up and low and behold abs popped up instantly.
could the actual abs unit be bad ? seems odd it popped up before moving anywhere.
will try tommorow with mes again see what it says still.
i havnt rushed this as drove all week with it popping up each trip but not noticed any brake feel or performance change even with a test emergency brake(fast stop not tying to lock all wheels)

each time i connect fes i get ebd failure message also but only appears to be triggered as fes connects
fault this time c1052 rear right phonic ring.
slow speed test looked better
https://ibb.co/jz9mQCP
road test threw up again and this time crashed fes also
https://ibb.co/JmWF8pk
you can still see a few drop outs in yellow trace
sorry for links for pics but couldnt upload for some reason straight here.
i couldnt see any damage or marks on the phonic ring so am gonna fire the parts cannon at the sensor.

as far as i can tell from eper
all stilos have sensor 51792166 on the rears on both sides doesnt show anything different for model variations or hatch or estate , yet ebay lists super variations in prices and all listed as seperate variations
fired the cannon at a sub 12 quid version.
will report back when arrives later in week.

as promised feedback on the sensor
bought off ebay £11.92 listed as lemark LAB463
old sensor removed and put side by side new sensor lead approx 20mm longer if that all rubber grommits there , plug correct sensor tip looks identicle.
might save some one a few pennies in future.
fitted and tested again.
unfortunately looks like more error than previously logged.
pics of sensors together
https://ibb.co/LZHCGVK
https://ibb.co/QdN2z6J
https://ibb.co/YytTtVS
https://ibb.co/MVt7r18
https://ibb.co/Pc0DQH3
logs
https://ibb.co/qWSJybp
https://ibb.co/mhyTNVX

as no better and issue looked to be similar with 2 sensors old and new my next thought is the phonic ring ?

sussexa said:

as suspected the fault re triggered and abs popped back on dash when got a bit more speed into it on the road.
could be a worth while note , as I can see how a garage could look into it clear the fault and send you on your way again only for it to pop up again down the road.

Click to expand...

With the new sensor making no improvement

Points at rotor.. or wiring.

Shame you cannot swap sides easily..

yep ordered a pair of abs rear hubs and bearings.
not money i wanted to spend but i think for having abs working again is worth it .
plus i will have 2 new rear bearings to boot, nothing lasts forever and these are all original wheel bearings on car since 2006.
shame cheapest fix failed me this time.
regarding wiring it was not disturbed at all until now , the plug is hidden under the wheel arch liner.
first time in there i remember dropping a bolt in behind disc also now looking back and tried to fished it out with a magnetic pick up tool leaving disc on , starting to wonder if that has affected the phonic ring in someway?

update 2 new wheel bearings abs type arrived 2 new nuts 2 new caps.
2x TBK1101 and i think nuts/caps must be TBK1101-22 total £46.90 delivered
not bad i thought.
had the pullers ready for pulling old bearings hubs off but to my surprise once the nut was off (32mm socket fitted ok and a very long breaker bar)the hubs just pulled off by hand , stub shaft sparkling no signs of rust.
so new ones fitted and torqued to as tight as they were coming off, used new nuts but old caps as new ones werent going on so easy old ones popped back in easy.
plugged mes back in and cleared fault, again abs and ebd error popped up just on connecting to abs ? think this is some strange glitch or cable fault ?
took for a spin up road all previous only seemed to take 30-40 mph to trigger fault, left on screen showing 4 wheel speeds and screen shot bellow.
after a few hundred yards noticed traces dropping out all 4 wheels , also speedo started pulsing on off bouncing up and down , carried on for a few hundred yards like this and then auto disconnected.
at that point the speedo returned to normal and the abs light stayed off, car drove ok and gave it a few sharp brakes to test, still ok
will update again only if abs fault returns ,
may test and log again if bored one day , nothing else touched ie speed sensor.
screen shot of multiscan
https://ibb.co/pxV2kr7
its a strange one

just seen this as still wondering why

that magnetic pic up tool was very similar to the type i had down the back to pick up a dropped item.
have some magnetic viewing film on order , as i just gotta know now.
at least i have 2 side by side to compare , one suspect one was ok no issues.
will post pics or vid when film arrives.

my magnetic viewing film just arrived and so here is the final thoughts of this
affair.
yes i fecked it with the magnetic pick up stick.
here are the 2 old hubs one good one suspect the tool that caused it and some cool pics of the field on the magnetic phonic ring.












as hopefully shows pretty clearly a segment of the ring was odd/ misssing/lessened/whatever , the untouched side shows a good un.
to prove the point i gave it another sweep with the magnet in the same section plus a bit and for sure it got larger and worse.
this magnetic viewing film is now a diagnostic tool as i think had i had it to begin with it would have been simple enough to view the phonic ring all the way round and observed this fault(caused by me)
so to confirm bevery carefull with magnets of any type around your abs rings or any other sensor ring for that matter.

just to clarify order of pics the hubs laying flat with film on top were first pics taken , hubs untouched since removal , then the wrap around , then the extra sweep with magnetic stick showing more black /less stripes , then the pick up stick last just for referance
lesson learned , share and move on, case closed.

That's interesting. I wouldn't have though the ABS rings were so fragile vs a magnetic field, so very worth pointing it out.

Ralf S.

sussexa said:

my magnetic viewing film just arrived and so here is the final thoughts of this
affair.
yes i fecked it with the magnetic pick up stick.
here are the 2 old hubs one good one suspect the tool that caused it and some cool pics of the field on the magnetic phonic ring.

View attachment 195796

View attachment 195797
View attachment 195802
View attachment 195798

View attachment 195799

View attachment 195800

View attachment 195801
as hopefully shows pretty clearly a segment of the ring was odd/ misssing/lessened/whatever , the untouched side shows a good un.
to prove the point i gave it another sweep with the magnet in the same section plus a bit and for sure it got larger and worse.
this magnetic viewing film is now a diagnostic tool as i think had i had it to begin with it would have been simple enough to view the phonic ring all the way round and observed this fault(caused by me)
so to confirm bevery carefull with magnets of any type around your abs rings or any other sensor ring for that matter.

just to clarify order of pics the hubs laying flat with film on top were first pics taken , hubs untouched since removal , then the wrap around , then the extra sweep with magnetic stick showing more black /less stripes , then the pick up stick last just for referance
lesson learned , share and move on, case closed.

Click to expand...

What about the screwdriver? Can you alter the field by using the same screw driver?

what screwdriver ?
i never mentioned a screwriver as far as im aware , the tool , is the magnetic pick up tool in the last set of pics , that was what i fished the bolt out with right at the start, must have swiped accross the magnetic ring.
i have no magnetic tipped screwdrivers to test if thats what your asking and dont fancy magnetising one just to test this , im sure any magnetic field would affect it to some degree, these pick up tool magnets are very strong compared to a magnetic screwdriver tip but its easier just to avoid contact of the phonic rings with any magnetic field.

sussexa said:

what screwdriver ?
i never mentioned a screwriver as far as im aware ,.

Click to expand...

>>there looked to be a build up of crud on the wheel speed sensor ring so gave it a gentle scrape with screwdriver to clean crap off(no scratching)