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Topic: ABS/TCS rolling test fail (Read 3505 times) |
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mk1boy
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I'm a YaBB newbie!
Posts: 31
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Re: ABS/TCS rolling test fail
« Reply #20 on: Dec 31st, 2011, 6:02pm » |
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Thanks guys. I can only asume that it is the controller that needs replacing and I don't know how I would test a replacement without it being on the car so taking one from a scrapyard is going to be a gamble (if I could find one that is).
A couple of silly questions - are the readings I have for the sensors ok - ie are they are as expected if the sensors are serviceable and secondly, I presume the motor only works when required - its not running all the time? If thats the case, i shouldn't be too surprised that it only works when 12v is applied as there wouldn't be power to it when the car is stationary?
thanks
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
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Re: ABS/TCS rolling test fail
« Reply #21 on: Dec 31st, 2011, 7:14pm » |
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The sensor readings are fine - but as mentioned doesn't mean they are functioning correctly.
The reason for testing the motor is that the code that usually indicates a failure of the controller is “C1095 Hydraulic Pump Motor Circuit Failure”
This is because the motor is tested as part of the startup/rolling road test. The motor is seen as at fault because of the pin fault preventing it being tested.
The advice to test the motor is just to rule it out if there is a C1095 code (not that I’ve seen any posts of a faulty motor).
Some of the details are in the link that Mike posted:
http://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl?board=admin;action=dis play;num=1268910490
There is also some advice on the main site:
http://www.fordscorpio.co.uk/abssystem.htm
Where do you live? There may be someone nearby with a reader who could check for codes.
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ABS multiplug wheel sensor pins MK IV or MK 20
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mk1boy
Newbie
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Posts: 31
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Re: ABS/TCS rolling test fail
« Reply #22 on: Jan 2nd, 2012, 12:07pm » |
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Thanks for the explanation. On the basis that it isn't working, I will probably have a go at reparing the controller - I can't see that I can make it any worse (well...)
I'll let you know how it goes once we get a weekend without any rain...
cheers
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mk1boy
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I'm a YaBB newbie!
Posts: 31
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Re: ABS/TCS rolling test fail
« Reply #23 on: Jan 2nd, 2012, 8:05pm » |
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More confusion...I was driving the car today and after around 10 minutes I noticed that the ABS and TCS lights weren't on. I went over to a nearby area of private land that is suitably rough surfaced and tested it out - the ABS and TCS worked perfectly!
Feeling confused but happy, I set off again only for both lights to come back on after a minute or so. When i next started the car, the start up test was fine but the lights came back on once i drove away. back to square one... 
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Tekno
Full Member
Tenho Ruohoranta
Posts: 599
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Re: ABS/TCS rolling test fail
« Reply #24 on: Jan 2nd, 2012, 10:41pm » |
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Have you cleaned front ABS sensor wire connectors? (next to Front shocks) They always collect moisture and dirt.
But I believe its the abs pump box solderings... i had 100% same symptoms..
just drill hole in box and resolder them like instructions say. easy job if done carefully
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1998 Ford Scorpio Ultima Estate 2.3i 16V
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
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Re: ABS/TCS rolling test fail
« Reply #25 on: Jan 2nd, 2012, 11:03pm » |
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That’s typical of ABS one minute it works, next it doesn’t. Prior to getting a code reader I wasted hours messing about with mine trying to get it sorted for the impending MOT.
I’ve just checked a MK IV controller. Although this picture is a different controller it’s the same arrowed motor pin that should link to earth (you’ll notice the plastic of the motor socket is curved next to the earth pin).
The one I’ve just tested if I gently push on the pin in all directions I can find one direction where the meter consistently looses contact. (Yes that’s your spare Mike  (Simmo) it’s faulty.)
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ABS multiplug wheel sensor pins MK IV or MK 20
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