ABS fault

Jamez · 30th July 2018, 16:55

Hello All
I wonder if anyone out there can help me recently purchased a ZT 190+ After doing rear suspension bushes & refitting everything back my abs light is not going out, Fault code 16 & 4 coming up on my friends laptop 16 is right rear line ? 4 we don't know, It's had 3 sensors fitted (I broke the second one fitting it) & new Hubs either side .Any ideas where exactly to look please

Best_of_British · 30th July 2018, 17:40

I would scan with T4 / TOAF / PSCAN or whatever to find correct corner.

Check the blue plug that pins have not bent and are in good nick.

Check the cable not been caught in wheel and worn through.

This leaves sensor or reluctor ring. If you have done rear suspension you will have knocked loads of rusty flakes off the crusty rear back plates, these can interfere with signal or get trapped and scrub the magnetic strips off bearing.

If you have fitted new sensor, you will know they are a tight fit and can take force to seat correctly, could it have been damaged?

Was the ABS hole cleaned up and vacuumed to get shut off debris. If you could get the sensor out I would try another known good one.

If you do battery reset I think the light will go out, if it comes on immediately the sensor has failed static test and I would try new sensor, If the light only comes on when the car has moved it could be not seated and the wrong gap to pick up signal.

I did one of mine and the light stayed on, went for a short spin around estate and it went out and stayed out.

Loads of threads with good information on here, particularly Frenchmikes diagnostics with multimeter.

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Best_of_British · 30th July 2018, 17:55

Good thread to pinpoint Static or Dynamic fault.

https://www.the75andztclub.co.uk/for...=139231&page=3

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trikey · 30th July 2018, 19:08

eBay sensors perhaps? I’ve had a couple of dodgy ones in the past.

I take it you have tried clearing the fault codes, sometimes the abs retains the fault even when all is ok.

Jamez · 31st July 2018, 07:18

Thanks for all the replies
Gonna have another look at it after work today if rain stops
In reply if fault is cancelled it comes on as soon as you start moving
New back plates fitted so no rust on hub ring there new as well
The other side is all new as well just right rear is problem.
I assume battery reset is when battery is disconnected ? Is there a specific length it has to be disconnected for ?
I have driven it about 3 miles hoping light would go out
All plugs look OK wires tight in plug

Best_of_British · 31st July 2018, 17:57

Sounds like the gap may not be right to get a a good signal, or some debris could be interfering with it. May be worth trying another sensor. Sometimes the cheap cheap ones are hit and miss, £8 range. I've had a Intermotor one and an SKV one that have been in the £15 - £20 range and have been fine. It's probably not possible to get it out without destroying it, new ones are always a tight fit and I usually trim the plastic lugs down with a craft knife to make fitting and removal easier. If it's an expensive one in I would check it is seated right, if cheap I would try another sensor.

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Jamez · 31st July 2018, 19:05

OK had an interesting afternoon! !!!!
First I unplugged sensors by back seat & compared readings both the same
Next I took right sensor out which either broke coming out or was broken (woo hoo I thought)
New one fitted & discovered if you pull out ABS fuse light go's out (again I thought woo hoo) drove it & light came on dam
So pulled of both discs & check distance from sensor too hub both look the same, pulled hubs off and check mating surfaces all good everything back on .
Yep light still on so either I buy non cheap sensor & try that or find a garage with good mechanic to diagnose the exact fault.

genpk · 31st July 2018, 20:23

It nay not be.related but on my zt, every time i go to wash any battery acid off the bottom of the battery tray the abs light comes on and stays on until it dries out.Even a small amount of water in that area seems to affect the abs block under the battery tray. Must be not sealed properly.
Could not figure it out until i realized both times was washing the tray out and bith times abs lighfs up.

Best_of_British · 31st July 2018, 21:01

Not good, these are frustrating to solve. Logically it's got to be the hub or sensor. All the garage will do different is pinpoint which corner. There is a large electrical plug that connects onto the ABS pump, this is under the battery tray and is sometimes worth checking and cleaning as acid from old batteries can leak on to it. Probably not the problem in your case as the diagnostic pointed at rear right. I would get it on TOAF / T4 or any other reader that will properly read the ABS ECU and point you in right area.

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Jamez · 1st August 2018, 06:30

OK I have just ordered a Genuine MG ABS sensor
I had the battery tray out when I replaced brake pipes all dry under there on pump

30th July 2018, 16:55	#1
Jamez Newbie MG Join Date: Jul 2018 Location: Faversham Posts: 8 Thanks: 0 Thanked 0 Times in 0 Posts	ABS fault Hello All I wonder if anyone out there can help me recently purchased a ZT 190+ After doing rear suspension bushes & refitting everything back my abs light is not going out, Fault code 16 & 4 coming up on my friends laptop 16 is right rear line ? 4 we don't know, It's had 3 sensors fitted (I broke the second one fitting it) & new Hubs either side .Any ideas where exactly to look please

30th July 2018, 19:08	#4
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,774 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	ABS fault eBay sensors perhaps? I’ve had a couple of dodgy ones in the past. I take it you have tried clearing the fault codes, sometimes the abs retains the fault even when all is ok. __________________ Lest we forget..

30th July 2018, 17:40	#2
Best_of_British Gets stuck in Rover 75 Tourer & Arden Green Project Join Date: Jul 2012 Location: Ormskirk Posts: 932 Thanks: 159 Thanked 200 Times in 155 Posts	I would scan with T4 / TOAF / PSCAN or whatever to find correct corner. Check the blue plug that pins have not bent and are in good nick. Check the cable not been caught in wheel and worn through. This leaves sensor or reluctor ring. If you have done rear suspension you will have knocked loads of rusty flakes off the crusty rear back plates, these can interfere with signal or get trapped and scrub the magnetic strips off bearing. If you have fitted new sensor, you will know they are a tight fit and can take force to seat correctly, could it have been damaged? Was the ABS hole cleaned up and vacuumed to get shut off debris. If you could get the sensor out I would try another known good one. If you do battery reset I think the light will go out, if it comes on immediately the sensor has failed static test and I would try new sensor, If the light only comes on when the car has moved it could be not seated and the wrong gap to pick up signal. I did one of mine and the light stayed on, went for a short spin around estate and it went out and stayed out. Loads of threads with good information on here, particularly Frenchmikes diagnostics with multimeter. Sent from my Redmi 4A using Tapatalk

30th July 2018, 17:55	#3
Best_of_British Gets stuck in Rover 75 Tourer & Arden Green Project Join Date: Jul 2012 Location: Ormskirk Posts: 932 Thanks: 159 Thanked 200 Times in 155 Posts	Good thread to pinpoint Static or Dynamic fault. https://www.the75andztclub.co.uk/for...=139231&page=3 Sent from my Redmi 4A using Tapatalk

31st July 2018, 07:18	#5
Jamez Newbie MG Join Date: Jul 2018 Location: Faversham Posts: 8 Thanks: 0 Thanked 0 Times in 0 Posts	Thanks for all the replies Gonna have another look at it after work today if rain stops In reply if fault is cancelled it comes on as soon as you start moving New back plates fitted so no rust on hub ring there new as well The other side is all new as well just right rear is problem. I assume battery reset is when battery is disconnected ? Is there a specific length it has to be disconnected for ? I have driven it about 3 miles hoping light would go out All plugs look OK wires tight in plug

31st July 2018, 17:57	#6
Best_of_British Gets stuck in Rover 75 Tourer & Arden Green Project Join Date: Jul 2012 Location: Ormskirk Posts: 932 Thanks: 159 Thanked 200 Times in 155 Posts	Sounds like the gap may not be right to get a a good signal, or some debris could be interfering with it. May be worth trying another sensor. Sometimes the cheap cheap ones are hit and miss, £8 range. I've had a Intermotor one and an SKV one that have been in the £15 - £20 range and have been fine. It's probably not possible to get it out without destroying it, new ones are always a tight fit and I usually trim the plastic lugs down with a craft knife to make fitting and removal easier. If it's an expensive one in I would check it is seated right, if cheap I would try another sensor. Sent from my Redmi 4A using Tapatalk

31st July 2018, 19:05	#7
Jamez Newbie MG Join Date: Jul 2018 Location: Faversham Posts: 8 Thanks: 0 Thanked 0 Times in 0 Posts	OK had an interesting afternoon! !!!! First I unplugged sensors by back seat & compared readings both the same Next I took right sensor out which either broke coming out or was broken (woo hoo I thought) New one fitted & discovered if you pull out ABS fuse light go's out (again I thought woo hoo) drove it & light came on dam So pulled of both discs & check distance from sensor too hub both look the same, pulled hubs off and check mating surfaces all good everything back on . Yep light still on so either I buy non cheap sensor & try that or find a garage with good mechanic to diagnose the exact fault.

31st July 2018, 20:23	#8
genpk Posted a thing or two Rover 75 Saloon MGZT Join Date: Jul 2012 Location: Perth, AUSTRALIA Posts: 1,664 Thanks: 3 Thanked 461 Times in 299 Posts	It nay not be.related but on my zt, every time i go to wash any battery acid off the bottom of the battery tray the abs light comes on and stays on until it dries out.Even a small amount of water in that area seems to affect the abs block under the battery tray. Must be not sealed properly. Could not figure it out until i realized both times was washing the tray out and bith times abs lighfs up.

31st July 2018, 21:01	#9
Best_of_British Gets stuck in Rover 75 Tourer & Arden Green Project Join Date: Jul 2012 Location: Ormskirk Posts: 932 Thanks: 159 Thanked 200 Times in 155 Posts	Not good, these are frustrating to solve. Logically it's got to be the hub or sensor. All the garage will do different is pinpoint which corner. There is a large electrical plug that connects onto the ABS pump, this is under the battery tray and is sometimes worth checking and cleaning as acid from old batteries can leak on to it. Probably not the problem in your case as the diagnostic pointed at rear right. I would get it on TOAF / T4 or any other reader that will properly read the ABS ECU and point you in right area. Sent from my Redmi 4A using Tapatalk

1st August 2018, 06:30	#10
Jamez Newbie MG Join Date: Jul 2018 Location: Faversham Posts: 8 Thanks: 0 Thanked 0 Times in 0 Posts	OK I have just ordered a Genuine MG ABS sensor I had the battery tray out when I replaced brake pipes all dry under there on pump