Jump to content





News Feed (View All Updates)


Photo

ABS activating after rear wheel bearing changed


  • Please log in to reply
22 replies to this topic

#1 2mondeos

2mondeos

    Member

  • Members
  • 10 posts
  • 0 thanks
  • Vehicle Driven:Zetec 2 tdci 130

Posted 17 November 2011 - 06:27 PM

Hi all,

I have an '03 tdci - it needed 2 new rear wheel bearings to pass MOT and these were fitted a couple of weeks ago.

Now, the ABS is activating at low speeds at the end of the braking - it's very brief but it's there. e.g. a 6 mile journey today - the ABS came on once - but on return journey it came on half a dozen times. When the ABS activates there is no warning light, just the braks pulsating for a second (if that). it's never had any ABS issues since I've owned it and it started the moment I left the shop after haviong the bearings replaced.

They are certain the new wheel bearings are fine, have been fitted correctly and the alignment is good for the sensors. They also replaced both bearings on once occasion, using a different supplier to rule out probs with bearing teeth etc.

It's a well respected local company, but the car has been with them 6 or 7 times over last couple of weeks and we're no further forward. It's had diagnostics run by at least 2 different places (one of them is a diags specialist).

Garage are trying their best, but I'm not mechanical at all so rely on them.

Has anyone had this sort of issue before and is there a checklist we can at least go through? If it's not the bearing, then is it a sensor not functioning, a wiring fault.

The fault is there, so why doesn't it come up on computer diags?

Thanks for your help.

#2 Gary Price

Gary Price

    TF regular

  • Members
  • 1,017 posts
  • 86 thanks
  • Vehicle Driven:Mondeo Mk3 TDCi
  • Name:Gary Price
  • Location:Flintshire

Posted 17 November 2011 - 06:49 PM

Normally the bearings are fitted with new abs sensors?
Was this the case with the bearings they fitted?

I would normally suspect faulty sensors in the new bearings, but since they have changed both to another set of bearings this should have ruled this out.
Are the 2 sets of bearings form different manufacturers? They could be from different suppliers but form the same manufacturer.

Are they activating on one wheel or both?

It is possible the wiring is damaged, or water in the connectors.

#3 2mondeos

2mondeos

    Member

  • Members
  • 10 posts
  • 0 thanks
  • Vehicle Driven:Zetec 2 tdci 130

Posted 17 November 2011 - 07:53 PM

Normally the bearings are fitted with new abs sensors?
Was this the case with the bearings they fitted?

I would normally suspect faulty sensors in the new bearings, but since they have changed both to another set of bearings this should have ruled this out.
Are the 2 sets of bearings form different manufacturers? They could be from different suppliers but form the same manufacturer.

Are they activating on one wheel or both?

It is possible the wiring is damaged, or water in the connectors.


Thanks Gary.

Normally the bearings are fitted with new abs sensors?
Was this the case with the bearings they fitted?
I don't know but I can ask them tomorrow. I was only charged for bearings, so likely answer is no.

Are they activating on one wheel or both?
I don't know. It's hard to tell because it's brief - but it feels like the front driver side, strangely. A mechanic drove it today while I sat in passenger seat and I'm not sure he knew either, but he knew it was coming on.

Sorry this is vague and probably no help at all.

#4 stripe88

stripe88

    Big Megger

  • Members
  • 2,031 posts
  • 152 thanks
  • Vehicle Driven:mondeo 2l ghiax
  • Location:worcestershire

Posted 18 November 2011 - 03:16 PM

thought they were sold with the sensors....go grab your old ones out of their bin...spares. probably plugs just want a clean up...wd40.

#5 totalguy

totalguy

    TDDI Buff

  • Members
  • 37,014 posts
  • 388 thanks
  • Vehicle Driven:mondeo tddi
  • Location:Rhondda Cynon Taff

Posted 18 November 2011 - 09:36 PM

thought they were sold with the sensors....go grab your old ones out of their bin...spares. probably plugs just want a clean up...wd40.


yes bearings are sold with abs sensors on them already. they sometimes come with bolts to bolt the bearing on sometimes you need to buy them seperate
51 plate ghia x tddi with extra oomph

Boost Pressure = ((MAP x 10) - BARO)/6.895 (use with F-Super readings)

My Blog http://abitoveverything.blogspot.co.uk

#6 Bamso

Bamso

    Just Joined TF!

  • Members
  • 1 posts
  • 0 thanks
  • Vehicle Driven:Mondeo Mk3
  • Location:Norway

Posted 22 November 2011 - 10:49 PM

Hi

I live in Norway, and have a similar problem with my '02 estate 2.0 TDDi. The problem startet after I had a garage to change all 4 brake discs. ABS is activated in the same way as you describe. In addition to that the brake pedal becomes very firm/hard sometimes, and the car requires a very hard pressure to the pedal before it stops.

I had a Ford dealer to run a full diagnostic, without any result. There are no fault codes. They also run the car with data logging on all four wheel, and all sensors seems to be operating as they should,

I would be very interested to learn if you have any progress with your car.

#7 PURPLE_2L_LX

PURPLE_2L_LX

    Mondeo Mk3 Moderator

  • Members
  • 14,991 posts
  • 688 thanks
  • Vehicle Driven:Estate, TDCI 130 (6)
  • Location:westmidlands

Posted 23 November 2011 - 12:00 AM

When they fitted new pads did they crack open a bleed nipple for the excess fluid to escape?

If not it can damage the seals in the ABS unit and the master cylinder.

How many miles have you done since?

2004 TDCi 130 LX Estate. (6)


MK3 FUSE INFO CLICK HERE ......... FORD WIKI CLICK HERE ........... FORD ETIS CLICK HERE


Adding your location may find someone local who could offer assistance.

F-Super, Bluetooth OBDII (ELM) and a MS509 scanners (test subjects required).


#8 siruncle

siruncle

    missing the "view new content" button

  • Regional Moderator
  • 15,258 posts
  • 933 thanks
  • Vehicle Driven:mondeo 2.0 ghia mk2
  • Name:Pete
  • Location:Rutland

Posted 23 November 2011 - 01:28 AM

Bamso: i'm pretty sure you can get a reading off the sensors at the connectors under the back seat, using a multimeter, there's a few topics on this in this forum/section, as well as how to's.

the haynes workshop manual (book) for your car will have details of what readings to expect.

From Rutland, Leicestershire or Northamptonshire? Join the Rutland Group, http://www.talkford....land-area-page/ Leicestershire, http://www.talkford....leicestershire/ or Northamptonshire, http://www.talkford....rthamptonshire/
2000 (W) Mondeo Mk2 Ghia 2.0 Hatch in Stardust Silver, now needing a pair of front jacking point covers...
 

Ever noticed that putting "anal" in front of some ford model names makes them sound funny? Fiesta, Probe, Ranger. Explorer, Maverick etc... lol


#9 woodsy133

woodsy133

    Just Joined TF!

  • Members
  • 2 posts
  • 0 thanks
  • Vehicle Driven:2005 mondeo st tdci
  • Name:lee woods
  • Location:England

Posted 31 January 2012 - 08:00 AM

Hi all, I have an '03 tdci - it needed 2 new rear wheel bearings to pass MOT and these were fitted a couple of weeks ago. Now, the ABS is activating at low speeds at the end of the braking - it's very brief but it's there. e.g. a 6 mile journey today - the ABS came on once - but on return journey it came on half a dozen times. When the ABS activates there is no warning light, just the braks pulsating for a second (if that). it's never had any ABS issues since I've owned it and it started the moment I left the shop after haviong the bearings replaced. They are certain the new wheel bearings are fine, have been fitted correctly and the alignment is good for the sensors. They also replaced both bearings on once occasion, using a different supplier to rule out probs with bearing teeth etc. It's a well respected local company, but the car has been with them 6 or 7 times over last couple of weeks and we're no further forward. It's had diagnostics run by at least 2 different places (one of them is a diags specialist). Garage are trying their best, but I'm not mechanical at all so rely on them. Has anyone had this sort of issue before and is there a checklist we can at least go through? If it's not the bearing, then is it a sensor not functioning, a wiring fault. The fault is there, so why doesn't it come up on computer diags? Thanks for your help.


i have just had a similar problem, i have just changed a rear wheel bearing, but at the same time i changed all four discs an pads, i initially thought that i had not bled the braking system properly. anyway like you said it was at the very end of braking at really slow speeds. i had diagnostics done and nothing flagged up. At this point i suspected a faulty sensor on the new wheel bearing. I took the whole thing back to local motor factors and they changed it under warranty.Put new one on and hey presto no more problems with it.
i thought it was strange that nothing came up on diagnostics though.
anyhow just a heads up to anyone else who encounters this problem.

#10 scratch golf

scratch golf

    rasa

  • Members
  • 148 posts
  • 5 thanks
  • Vehicle Driven:mondeo tdci mk3
  • Name:kenneth lansbury
  • Location:tyne&wear

Posted 31 January 2012 - 08:06 AM

mine has been doing it for weeks,my mate owns his own garage so i tok it to him,he had a look and before he put it on the ramps he said it was abs ring,all 4 would have to be checked to find the culprit,but he said it was nothing major.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users