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Author Topic: ABS & TC lights on  (Read 13107 times)

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TheBoy

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Re: ABS & TC lights on
« Reply #45 on: 28 September 2015, 18:34:15 »
Pics needed to make a better/alternative/enhanced/merged guide ;)
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terry paget

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Re: ABS & TC lights on
« Reply #46 on: 28 September 2015, 19:41:37 »
I have posted a new thead describing how to change  the ABS ECU. I note TB wants more pics to update existing guide. I hope you can follow my notes, any problems let me know. Al and Chris might disapprove of my procedure, they are perfectionists. Good luck!
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Entwood

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Re: ABS & TC lights on
« Reply #47 on: 28 September 2015, 20:11:32 »
Many thanks .. printed off, camera on charge, memory card clear .. I'll see what happens !!
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terry paget

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Re: ABS & TC lights on
« Reply #48 on: 28 September 2015, 20:30:21 »
I am hoping all the LPG plumbing is on the inlet side and not in your way.
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Entwood

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Re: ABS & TC lights on
« Reply #49 on: 29 September 2015, 13:18:47 »
Excuse me while I swear very loudly and for a long time ... :(

ECU changed - not quite as simple as Terry suggests . but I'll do a "how to" when I've calmed down ...

Only difference in the ECU's ... my old one yellow sticker "WH", replacement one yellow sticker "WQ" ... don't know if that makes any difference, but it has made no difference to the problem.

Driven down the road for 2 miles ... fault remains .. fault code

C0035 (4) - Front Left Wheel Sensor Open CircuitRear Left Wheel Sensor Open Circuit - PRESENT

Go to measuring blocks and both rear wheels show speed output, both front wheels show 0

I realise "My Naff Code Reader" may be telling me lies .. but I still don't see 2 wheel sensors failing simultaneously....... other than a trip to Brackley to get the codes read by an expert with the right kit .... any ideas ??

p****d off of Wootty B
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Sir Tigger KC

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Re: ABS & TC lights on
« Reply #50 on: 29 September 2015, 14:15:40 »
Did the replacement ECU come form an identical vehicle? If not then a chat with a Tech2 might sort it.  :-\
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Entwood

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Re: ABS & TC lights on
« Reply #51 on: 29 September 2015, 14:23:02 »
Quote from: Sir Tigger on 29 September 2015, 14:15:40
Did the replacement ECU come form an identical vehicle? If not then a chat with a Tech2 might sort it.  :-\

I'm reliably informed a 3.2 auto saloon ... same as mine .. :-\
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Sir Tigger KC

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Re: ABS & TC lights on
« Reply #52 on: 29 September 2015, 14:29:48 »
Quote from: Entwood on 29 September 2015, 14:23:02
Quote from: Sir Tigger on 29 September 2015, 14:15:40
Did the replacement ECU come form an identical vehicle? If not then a chat with a Tech2 might sort it.  :-\

I'm reliably informed a 3.2 auto saloon ... same as mine .. :-\

Maybe it has to be more specific, same age, within a range of engine numbers etc.  :-\

That's about the limit of my advice so I'll pipe down, but I guess either hooking up to a Tech 2 might sort it, or worst case scenario you now have the original out and can send it off for repair.  ::)  Good luck!  :y
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Kevin Wood

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Re: ABS & TC lights on
« Reply #53 on: 29 September 2015, 15:10:52 »
It's unlikely that you'd get exactly the same fault symptoms even if the ECU were misconfigured for the vehicle, IMHO.

I think a failure of the two wheel sensors or the wiring to them, however unlikely, might be all that remains.
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Entwood

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Re: ABS & TC lights on
« Reply #54 on: 29 September 2015, 15:32:19 »
OK .. getting more pissed off at every step .. but possibly reaching a solution .... :(

In desperation I unplugged all 4 sensors and went for a drive ... "My Naff Code Reader" stated only fault the same as before ... front left rear left .. no mention of the other 2 !! all 4 sensors showing 0 speed as expected.

plugged in JUST front right, no change to fault code (front left rear left) but front right showed speed - which it had not done before -

unplugged front right, plugged in each rear in turn, no change to fault codes at any time (front left rear left) but each wheel showed speed,

plugged in JUST front left, still no change to codes (front left rear left) but no speed indicated at all.

Plugged all back in, no change to codes (front left rear left) but now all wheels EXCEPT front left show speed.

So looks like a front left sensor ?? going to take the wheel off and check the wiring best I can but I'll ask in parts for a front left sensor as that's the next logical thing to change.

Also looks like "My Naff Code Reader" does not tell the truth ...  :(

Just need someone to explain how unplugging / replugging the front right, this time but not last,  has made it start to work ...
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Kevin Wood

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Re: ABS & TC lights on
« Reply #55 on: 29 September 2015, 16:51:45 »
Hmm. Does look like something has been lying to you.  ::)

Can you measure the resistance of the 2 front sensors, just to see if they are similar? Might rule out a wiring issue between sensor and ECU?

IIRC, the front sensors don't come out in one piece, so changing them is a one way street
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terry paget

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Re: ABS & TC lights on
« Reply #56 on: 29 September 2015, 17:33:21 »
Front sensors sods to change. My solution was to buy a used hub complete with bearing and ABS sensor from Steve Brown at Heathrow for £20 and fit it as an assembly.
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Entwood

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Re: ABS & TC lights on
« Reply #57 on: 29 September 2015, 17:43:44 »
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TheBoy

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Re: ABS & TC lights on
« Reply #58 on: 29 September 2015, 18:11:34 »
On the offchance the sensor is cheap, ring dealer.  You'll likely have to drill/retap hub, but at least you know your bearing/hub/geo are all good (presumably). "new" hub introduces some new unknowns.
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terry paget

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Re: ABS & TC lights on
« Reply #59 on: 29 September 2015, 19:50:51 »
Hi Entwood, sorry fault is not cured. My first Omega ABS fault I assumed was ECU, bought used ABS.ECU unit (£150) from Steve Brown, fitted it Haynes, involving unscrewing all hydraulic pipes, no cure. So removed ABS.ECU, returned for refund, refitted original. Replaced NS front sensor by replacing hub, no change. In despair, looke at rear sensors, they were OK. Then spotted crack in NS rear eluctor ring, allowing it to slide along drive shaft. Glued ring to shaft, fault cured. Pic follows.
[urlhttps://www.dropbox.com/s/gsouoxpfppyglbt/ABS%20RELUCTOR%20RING%20CRACK70%25.JPG?dl=0][url]
On a Citroen CX, my ABS fault was a frayed front sensor cable. On a Senator I had a rear sensor fail. On older cars ABS is a mixed blessing.
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