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1st December 2019, 18:56 | #1 |
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ABS warning light
I have looked at previous threads on this but can't find circumstances similar to mine so I thought I would post a new one as I'm sure there's lots of experience out there.
My ABS warning light came on the other day and at the same time my speedo stopped working and my fuel gauge was not registering correctly. From what I'd researched on here I narrowed it down to my front offside sensor. The day before I'd driven through some heavy rain and through a number of quite deep puddles in the road. I checked the blue connector under the bonnet as well as the wire going to the front hub and all seemed to be dry and ok. This was not to be unexpected as the front sensors was replaced about 4 months ago at a garage when the wheel bearings were replaced. It was a sunny day when I checked everything and the warning light did not come on so I put it down to getting water in the system and that this had dried out. The next morning I found that when I started the car the light was on again. I drove if for a mile or two, switched the engine off and restarted and everything was ok once more. Again I put it down to residual dampness probably made worse by the damp morning which got dried out after a couple of miles driving. This went on in a similar way for a couple more days but now the light is on and won't go off if I restart the car. Is there something else I should be checking? I'm assuming that the sensor is ok because it is nearly new. I did try to remove it from the hub to check bit it was stuck quite fast and I didn't want to break it while removing it and wasn't really sure that there was much to check once removed. Any suggestions will be gratefully received. |
1st December 2019, 19:50 | #2 |
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Hi Pugcrew. I can't speak specifically for the Rover, but on other cars where I have experienced intermittent ABS lights, the most common fault is the reluctor ring (the toothed magnetic ring which the sensor picks up on) being at the limit of the range that the sensor can detect. Any play in the wheel bearing (I know it has just been replaced) can take it out of range, and the light comes on. Jack the wheel up off the ground, grasp it at top and bottom, and try to rock it. Any play detected could be the cause of your problem. Alternatively,muck or corrosion on the ring can also confuse the sensor. The gap between sensor tip and ring should ideally be less than 1mm.
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1st December 2019, 21:29 | #3 |
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Have you checked the connector in the engine bay? I fitted a sensor bought off eBay and it worked for a while but then the warning light started to come on now and again before staying on. Turned out the connector was not seating properly. I bought one from dmgrs and when I connected it you could hear a nice click as it connected. I have had no issues since then.
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2nd December 2019, 08:47 | #4 |
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NOW a Club Tourer was 1999 - 75 2.0Ltr Connoisseur SE petrol Saloon Join Date: Jan 2012
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Check out the multi-plug to the ABS unit under the battery, particularly if you have had a lot of water lately.
See my catastrophe last year at http://www.the75andztclub.co.uk/foru...t=abs+traction and at http://www.the75andztclub.co.uk/foru...t=abs+traction. do a search in the Technical Help forum for ABS Traction that might help. In the end I managed to obtain a new part-loom with plug and a new ABS unit, Follow all advice on bleeding the system, but I found it can be done without power on, although it helps at the end to have the engine running for that little extra "push"! __________________
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Chuck Nth. Dorset. UK Membership #1896 Don't take life so seriously.... it is not permanent! |
8th December 2019, 18:29 | #5 |
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Thanks for the replies.
Over the last week it has gone from intermittent to always on so I guess my theory about water getting in somewhere then drying out may not be right. I will try the connector as you suggest Clarky before I get too involved with anything more complex. I've had similar problems with the airbag connections under the front seats so I'm hoping it will be something simple as that. As the detector is new I'm pretty confident that it will be ok and I know the wheel bearings are good although I will double check when the weather is better and I get the opportunity. If all that fails it may be the reluctor ring. Does anyone know how I can get to this to see if its corroded or simply needs cleaning? |
8th December 2019, 19:15 | #6 |
I really should get out more.......
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Before ripping apart ABS bits, you also said that your fuel gauge was playing up and your speedo had stopped working. Speedo could be ABS related but the fuel gauge? Wouldn't it be worth a trip down the coast to Fareham and see CB750 Chris who has a T4 diagnostic computer rather than guessing?
Regards |
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