A.B.S.problem?

Kenneth Smith · 22nd July 2017, 15:04

Hi Everyone, my Rover 75 diesel Club saloon has developed a fault with the A.B.S. sensors or module I think. The brake pedal slightly 'shudders' and makes a strange 'pinging sound' when I pull up slowly as if the A.B.S. is being ask to come in. I had this problem about a year ago but was cured by replacing one of the A.B.S. sensors. Now the fault has returned but the Garage and the Auto Electrician cannot solve this problem as they have gone so far but cannot determine whether one of the A.B.S. Sensors or the A.B.S. Module are at fault as they cannot interpret what the car is telling them. It could be deep inside the car said the garage and cost a lot of labour time to repair so I stopped them going any further after paying them £120 for no result. The Garage said they would live with problem if the car was theirs but I'm not sure what to do next. Got any ideas. Regards Ken

chris75 · 22nd July 2017, 15:40

You did well to leave that garage !

I would go for some diagnostics ; get the car to someone with a T4 , or if you feel confident yourself then download and use TOAF .Either will tell you which wheel is originating the issue etc .
Hint : If your speedo is still working then it is not front o/s , and if your cruise control is working then it is not the front n/s

squire · 22nd July 2017, 16:30

As suggested you really need to get the car on a T4 to find out where the fault is, problems with the rear hubs are getting more common, particularly as the back plates rust and rust particles stick to the magnetic ring.
There is a list of T4 operators on here or use the Google search for them, also a lot of threads about ABS problems, again use the Google search for them. It seem very often the rhs rear hub is the main culprit, but you really need T4 to point you in the right direction. Hope this helps.

Martyn

HarryM1BYT · 22nd July 2017, 16:45

Quote:

Originally Posted by chris75

Hint : If your speedo is still working then it is not front o/s , and if your cruise control is working then it is not the front n/s

Failure of either, would mean the ABS light would be on and their was no suggestion of that. It sounds like it could be an intermittent sensor issue, working most of the time.

I agree that getting away from the garage was the right thing to do, they would not fill me with confidence.

marinabrian · 22nd July 2017, 16:56

A quick run up to see CB750Chris in Pompey will reveal all, however I'm going to go out onto a limb and suggest a plausibility issue with one of your rear wheel bearings being the culprit.

Slowly road testing the car while looking at the live data from the ABS module will pinpoint as well as reading the relevant fault codes

Brian

Master · 22nd July 2017, 19:55

As suggested get your car on a T4 otherwise you will end up like me going around in circles & spending money you dont have to

trikey · 22nd July 2017, 19:58

Im with Brian on this one, rear wheel bearings are well know for causing this fault.

Dallas · 22nd July 2017, 20:23

Quote:

Originally Posted by trikey

Im with Brian on this one, rear wheel bearings are well know for causing this fault.

Most probably the N/S, as it gets all the road debris from kerb-side. This is what my problem was last year, water and puddles seem to aid the corrosion problem, my O/S is in much better shape.

Kenneth Smith · 22nd July 2017, 20:32

Thank you very much everyone for your valuable advice which I will take. Ken

KOH · 22nd July 2017, 21:42

Ken
I had ABS problems for a few months when i first got my 75 CDTi. sensors all tested ok (using test harness and manually rotating wheels - 38? voltage changes) but changed both rear sensors anyway. Still no better.
Problem resolved by cleaning prongs on ABS fuse in engine bay fuse box.
Passing enough current to pass start-up test but couldn't manage full load when ABS invoked for real?

22nd July 2017, 15:04	#1
Kenneth Smith Avid contributor Rover 75 1.8T Tourer Join Date: Jan 2010 Location: Hayling Island Posts: 214 Thanks: 56 Thanked 7 Times in 7 Posts	A.B.S.problem? Hi Everyone, my Rover 75 diesel Club saloon has developed a fault with the A.B.S. sensors or module I think. The brake pedal slightly 'shudders' and makes a strange 'pinging sound' when I pull up slowly as if the A.B.S. is being ask to come in. I had this problem about a year ago but was cured by replacing one of the A.B.S. sensors. Now the fault has returned but the Garage and the Auto Electrician cannot solve this problem as they have gone so far but cannot determine whether one of the A.B.S. Sensors or the A.B.S. Module are at fault as they cannot interpret what the car is telling them. It could be deep inside the car said the garage and cost a lot of labour time to repair so I stopped them going any further after paying them £120 for no result. The Garage said they would live with problem if the car was theirs but I'm not sure what to do next. Got any ideas. Regards Ken

22nd July 2017, 15:40	#2
chris75 same car since 2005 2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006 Location: Ellesmere Port , Cheshire Posts: 3,811 Thanks: 379 Thanked 549 Times in 466 Posts	You did well to leave that garage ! I would go for some diagnostics ; get the car to someone with a T4 , or if you feel confident yourself then download and use TOAF .Either will tell you which wheel is originating the issue etc . Hint : If your speedo is still working then it is not front o/s , and if your cruise control is working then it is not the front n/s __________________ Who said it was simples ?

22nd July 2017, 19:58	#7
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,765 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Im with Brian on this one, rear wheel bearings are well know for causing this fault. __________________ Lest we forget..

22nd July 2017, 20:32	#9
Kenneth Smith Avid contributor Rover 75 1.8T Tourer Join Date: Jan 2010 Location: Hayling Island Posts: 214 Thanks: 56 Thanked 7 Times in 7 Posts	A.B.S. problem? Thank you very much everyone for your valuable advice which I will take. Ken

22nd July 2017, 21:42	#10
KOH Regular poster Rover 75 Auto Tourer Join Date: Apr 2015 Location: Forest of Dean Posts: 51 Thanks: 10 Thanked 3 Times in 3 Posts	ABS Problem Ken I had ABS problems for a few months when i first got my 75 CDTi. sensors all tested ok (using test harness and manually rotating wheels - 38? voltage changes) but changed both rear sensors anyway. Still no better. Problem resolved by cleaning prongs on ABS fuse in engine bay fuse box. Passing enough current to pass start-up test but couldn't manage full load when ABS invoked for real?

22nd July 2017, 16:30	#3
squire Posted a thing or two MGB GT, 2 Morris Minor Travellers Join Date: May 2011 Location: Bilston Posts: 1,661 Thanks: 1,610 Thanked 497 Times in 370 Posts	As suggested you really need to get the car on a T4 to find out where the fault is, problems with the rear hubs are getting more common, particularly as the back plates rust and rust particles stick to the magnetic ring. There is a list of T4 operators on here or use the Google search for them, also a lot of threads about ABS problems, again use the Google search for them. It seem very often the rhs rear hub is the main culprit, but you really need T4 to point you in the right direction. Hope this helps. Martyn

22nd July 2017, 16:56	#5
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	A quick run up to see CB750Chris in Pompey will reveal all, however I'm going to go out onto a limb and suggest a plausibility issue with one of your rear wheel bearings being the culprit. Slowly road testing the car while looking at the live data from the ABS module will pinpoint as well as reading the relevant fault codes Brian

22nd July 2017, 19:55	#6
Master Loves to post Rover 75 saloon Join Date: Dec 2013 Location: Newcastle Posts: 489 Thanks: 279 Thanked 84 Times in 46 Posts	As suggested get your car on a T4 otherwise you will end up like me going around in circles & spending money you dont have to