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Author Topic: ABS and TC lights sometimes on sometimes off  (Read 5171 times)

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henryd

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Re: ABS and TC lights sometimes on sometimes off
« Reply #15 on: 01 April 2014, 00:05:00 »
Quote from: Andy B on 31 March 2014, 23:53:21
Quote from: Toledodude1973 on 31 March 2014, 21:52:37
i know the ring you mean now thanks, always learning with Omegas :)

The reluctors - both front & back) are basically the same on her Smart, as they were on my Senators (never ventured under the Merc yet  :o) ) An exception was my C reg MKI Carlton, that used a single sensor that looked at the teeth on diff's crown wheel

A lot of cars these days use a magnetic covering on the wheel bearing seal as a reluctor :y
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Kate

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Re: ABS and TC lights sometimes on sometimes off
« Reply #16 on: 01 April 2014, 19:07:12 »
It was a second hand abs ecu that was fitted.

Will this be a big repair job?
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Entwood

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Re: ABS and TC lights sometimes on sometimes off
« Reply #17 on: 01 April 2014, 19:39:42 »
Quote from: Kate on 01 April 2014, 19:07:12
It was a second hand abs ecu that was fitted.

Will this be a big repair job?

Same size as the last one .. :(  Any second hand ECU runs the risk of the same failure as the first (and in your case - the second :( )

It is for that reason that I suggested getting yours repaired .. you then know where you stand with it .. 2 places do the job ..

ecutesting and bba-reman ....   bba-reman were £130 with a 1 year warranty, but that was 5 years back so price has probably changed....
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terry paget

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Re: ABS and TC lights sometimes on sometimes off
« Reply #18 on: 01 April 2014, 22:06:28 »
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terry paget

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Re: ABS and TC lights sometimes on sometimes off
« Reply #19 on: 01 April 2014, 22:20:33 »
Sorry, pics failed. Have has to switch from Firefox to internet explorer to avoid pest of a Trojan. Will try again.
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Entwood

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Re: ABS and TC lights sometimes on sometimes off
« Reply #20 on: 01 April 2014, 22:22:41 »
HTH



:)
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Kate

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Re: ABS and TC lights sometimes on sometimes off
« Reply #21 on: 02 April 2014, 09:39:58 »
Thanks for that. :y

Is there a guide for this job?
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Andy B

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Re: ABS and TC lights sometimes on sometimes off
« Reply #22 on: 02 April 2014, 11:13:05 »
Quote from: Kate on 02 April 2014, 09:39:58
Thanks for that. :y

Is there a guide for this job?

yes  ;)
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Andy B

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Re: ABS and TC lights sometimes on sometimes off
« Reply #23 on: 02 April 2014, 11:13:54 »
seek ........................ and thou shall find  ::)

http://www.omegaowners.com/forum/index.php?topic=90627.0
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terry paget

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Re: ABS and TC lights sometimes on sometimes off
« Reply #24 on: 02 April 2014, 14:05:59 »
https://www.dropbox.com/s/ag6b8t7teuhtxq1/ABS%20RELUCTOR%20RINGS%2020%25.jpg
https://www.dropbox.com/s/286s6h2n1fazzkq/RELUCTOR%20RING%20CRACK.JPG
https://www.dropbox.com/s/mami3ko109lqtfl/DRIVE%20SHAFT%20W.CRACK%2020%25.JPG
Here are pics. One of the diff from below; you may note that the right hand ring (shiny one) is further out from diff than left hand.
One shows the half shaft removed at later date, you may glimse the crack in reluctor ring.
One shows the crack in close up.
Sorry about the delay.
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Entwood

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Re: ABS and TC lights sometimes on sometimes off
« Reply #25 on: 02 April 2014, 15:31:50 »
Terry ...  HTH :)





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henryd

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Re: ABS and TC lights sometimes on sometimes off
« Reply #26 on: 02 April 2014, 17:01:14 »
Quote from: Entwood on 01 April 2014, 19:39:42
Quote from: Kate on 01 April 2014, 19:07:12
It was a second hand abs ecu that was fitted.

Will this be a big repair job?

Same size as the last one .. :(  Any second hand ECU runs the risk of the same failure as the first (and in your case - the second :( )

It is for that reason that I suggested getting yours repaired .. you then know where you stand with it .. 2 places do the job ..

ecutesting and bba-reman ....   bba-reman were £130 with a 1 year warranty, but that was 5 years back so price has probably changed....

I think I would be getting the codes off it before getting the spanners out,it could just be something else ::)
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Kevin Wood

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Re: ABS and TC lights sometimes on sometimes off
« Reply #27 on: 02 April 2014, 18:52:59 »
Quote from: henryd on 02 April 2014, 17:01:14
I think I would be getting the codes off it before getting the spanners out,it could just be something else ::)

Yep, there's not much you can tell about ABS sensors by looking, unless it's something obvious like the reluctor ring missing. You can't often get the sensors off intact, so best to leave them be until diagnosed failed.

A chat with a tech 2 will establish what's going wrong, as if the ECU has failed, it's normally impossible to connect to them. Other problems leave fault codes, so easily tracked to the offending sensor.

I have to say, if it takes out the speedometer, it's normally an ECU failure. :'( If it loses one wheel sensor, it can still work out the speed using the remaining 3.
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terry paget

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Re: ABS and TC lights sometimes on sometimes off
« Reply #28 on: 02 April 2014, 19:25:42 »
Quote from: Kevin Wood on 02 April 2014, 18:52:59
Quote from: henryd on 02 April 2014, 17:01:14
I think I would be getting the codes off it before getting the spanners out,it could just be something else ::)

Yep, there's not much you can tell about ABS sensors by looking, unless it's something obvious like the reluctor ring missing. You can't often get the sensors off intact, so best to leave them be until diagnosed failed.

A chat with a tech 2 will establish what's going wrong, as if the ECU has failed, it's normally impossible to connect to them. Other problems leave fault codes, so easily tracked to the offending sensor.

I have to say, if it takes out the speedometer, it's normally an ECU failure. :'( If it loses one wheel sensor, it can still work out the speed using the remaining 3.
On OE03EWW I had ABS and TC lights coming on, and lost speedo reading. I changed the ABS ECU three times, fault was nor cured. Only when I tracked it down to RH rear eluctor ring moving about did I cure the fault. Above car takes speed and distance information from rear RH sensor, and no other. I suspect all manuals are the same. On a 4 pot Omega driven by son Jonny an alarming ABS fault developed, ABS kicking in on dry roads. To make the car useable I cut the wire from RH rear sensor. Big mistake, speedo also failed. I repaired Rh rear sensor cable, cut LH rear sensor cable, and the speedo returned and the brakes worked simple - no ABS but otherwise fine.
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05omegav6

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Re: ABS and TC lights sometimes on sometimes off
« Reply #29 on: 02 April 2014, 20:35:08 »
Terry I would suggest that had more to do with plod wiring rather than Vauxhall...

Mine had the TC disabled, and in service had a switch for disabling the ABS for collision investigation purposes.

Worth noting that TVP routinely disabled the TC switch on their Omegas.
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