We Diagnose A Rear Wheel Speed Sensor ABS Fault - Vauxhall Mokka
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- čas přidán 20. 08. 2024
- We got an ABS light up on this Vauxhall Mokka 2013 and a scan revealed a fault on the rear left sensor. Let's see how we diagnosed the problem to find out where the fault lies.
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Bring back cars from the 80s ,so simple back then ,none of these headaches lol 😆,keep up the good work Martin 👍
Thanks 👍
And none of the safety either!
As they say , "keep it simple stupid" too much technology and not for the faint hearted.
@@davidpost6902 ABS? Seems pretty straightforward to me, and I'd not want a loved one driving a car without it.
ABS has been around since the 1960's and was first used in aircraft, namely Concorde.
You're looking much better than you were a few months ago, good to see you working on cars again.
Martin, I'm a hgv mechanic, what I would have done is use Handheld Digital Oscilloscope, on the abs pick up check signal ect first, disconnect from the loom, then you know is wiring back from the plug, at fault or abs sensor or the pickup ect, as You might know the abs sensor inductive type sensor, you can check resistance with a multimeter, anyway to confirm,
Saves alot of time, in my game time is money and the job needs to be done ect
Thanks for sharing
Clever way of checking mate id have done similar 👍
Another fabulous video Martin, so complicated for what it is,,,,continuity testing on these new cars must be a nightmare. Top idea thinking about the wires being incorrect from the garage, I was definitely banking on that. fascinating demonstration so far on a diagnostic approach to these electrical circuits
Thank god your back! I've learned a lot from your videos and you always work on Vauxhalls! I wish to keep learning, Thank you
Nice to see you both doing a video together, another great video.
Thanks 👍
Nice for you both to have so much knowledge on repairing cars. Must be a great help for yourselves and by helping people, and as a customer knowing you have had a good job done. Just shows doesn’t it when you go to a garage you trust them don’t you. .. makes you winder doesn’t it, I know we have often thought things haven’t been done when you collect your car back, but maybe they hope you go back. You can can clearly see you both know what your looking at , shame not a few more about like you. Pity you don’t live near us, our daughter in law needs a lot doing to her car , she hasn’t used it for ages, but garage want so much to sort just small issues., like we just saw, how much would really be done. At a high cost . Thanks for sharing.
Martin, this reminds me of when I had an ABS problem on the right rear wheel on my 2009 Mercedes C200. The sensor was still reading the wheel speed in the live data on my scantool. I replaced the sensor (cheap and easy enough to try) but it didn't fix the problem. The magnetic ABS pickup ring had delaminated and once it had been replaced it fixed the problem. The left rear one went the same way so I changed the pickup ring on that side too and it has been fine ever since.
That was worth showing for sure, nice work! Your in good spirits here which is great to see! 🙂👌
Martin brilliant diagnosis, my speed sensor prob on my connect turned out to be a failing wheel bearing, no noise at that point replaced the bearing gone🤔
Nice work Martin and Gary love watching your repair videos watching from South Africa
Enjoyed the step by step investigation. Thanks for taking us along.
sorry about my comment about the reluctor ring, its me thats got it wrong with the mokka reluctor ring, you were right about the wiring,
Greatly informative video Martin, hope it never happens to my Mokka, what a pain!
Best not to go under cars with just a hydraulic jack holding it up, at least wedge a spare wheel (or 2) under the side sills to save your life and properly wedge the other 3 wheels. Hydraulic jacks depend on a very small seal to stop them dropping.
I read that it's possible to wedge a couple of blocks of wood in the jack frame under the saddle, so the jack can't lower, but I would still wedge spare wheels under the sills (if the sills are strong enough), before attempting to properly position the axle stands.
Great work mate and Gary 👍🏻👍🏻. Definitely opening a can of worms
@10:14 i guess one thing you could have tried here would be to swap it with another wheel speed sensor from a working corner and see if the issue is still present, that would tell you wiring or sensor was the issue.
There was nothing wrong with the sensor or hub as I showed in the video. Didn't you see me connect that hub to the drivers side loom and it worked?
Very well worked out ! Hopefully there’s a part 2 !! 👏🏻👏🏻
Hi Martin a great bit of detective work. I thought when I saw the bare wires that was your problem.
Unfortunately like my father in law's Jaguar sensors I am still trying to work out the problem. Give me a Mk2 Escort anytime. Lol
Take care, Jeff
Thanks Jeff, yes, a pain tracing faults in modern cars.
Great video , loads good ideas for any one with similar faults cheers the Pair of you .
Always keep a breaker bar near your seat with a socket on 😉 if you know what I mean
Had same issue with a vauxhall meriva, which was the bearing not the sensor.
Top team 👍🏻🙋🏼♂️🏴
Nice on Martin, good vid.
Brilliant Martin , very clever fault finding techniques , not bad for an old boy 😁👍
Hi Michael, yes I got it wrong, I had already replied that I had, really sorry my mistake.
I would have joint the two earths together left and right side, you might get lucky find it’s just the earth wire broken left side
Whatever cable is broken, it still goes into the loom and we need to find the route. That's the next stage now we have told the owner.
It’ll be a BCM fault, Body control module. Most likely be near the ABS pump.
Thanks for doing these informative video's. Its really interesting seeing how you get to the bottom of problems.
Glad you enjoy it!
👍👍👍. Thanks Martin
you got it all wrong with the Mokka. the problem is its not picking the signal up from the rear left reluctor ring could be rust on it, also when you connected the wires up to the offside rear you said you had confirmed the left side was working, what you had done is confirmed the wiring to the left rear was working . watch your video again.
Think you need to re watch the video he got all his diagnosis correct the near side abs sensor and reluctant ring picked up a signal when it was connected to the off side main side of the harness
You need to watch the video again bud.
I had a bearing with a built in speed sensor ring on the rear of an Audi and it had a loose ring that was slipping in the bearing giving an intermittent fault it felt like marbles under my foot on the brake pedal. The only way I found it was using the software and a laptop and reading the wheel speed.
I addressed that in this video.
Continuity is that your new favourite world??
Cool, good work Martin.
Hi Martin and Gary. Love the vids. A car I had a while ago had the fault code c0041 and said something very similar about open line in the diagnostics . Had the sensor changed and tested still the light came on. It turned out in the end to be a very small crack in the abs reluctor ring.which was hard to spot Once that was changed the fault went away. Hope that could be of help for you guys. :)
I proved in the video that the hub and reluctor was fine by connecting it to the right hand side loom bud.
No problem. I just felt as I had the same issue for months it may have been of help. Keep up the greats vids 👍
Has it had a wheel bearing changed recently?? If so it may have been fitted the wrong way round
Well done Martin.. you should be a mechanic!!😃
Could it be a fuse on a open circuit
Once we get the workshop manual, that's the next check. I doubt it though as they are signal wires.
@@retrorestore can wait for you next video on it and good luck keep up the good work and project man
Are you able to turn off the speed sensor in the setting on your diagnostic device? What is it actually for?
It controls the ABS
@@retrorestore ah, bugger. At least you’ve been able to identify where the problem lies.
Thanks for taking the time to reply. 👍🏻
Those crimp connector are rubbish you’re better off, soldering the wiring and using heat, shrink completely make water tight seal on the wiring
Not bothered whilst testing. Once the problem is located we'll attend to a permanent fix.
Agree those crimps in that wet/muddy area is a terrible idea.
I bet its going to be the vcu thats faulty always the expensive things that go wrong 🤦♂️
Hi its the hub
I just proved in the video it wasn't the hub.
Hi sorry just checked the video again you were right
👍👍👍👍👍👍👍👍👍👍👍👍👍👍
Vauxhalls troublesome to say the least 😂
What cars aren't