Omega Owners Forum - TC light comes on when accelerating hard at speed

MV6Matt

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On 19's with 3 litre cams
and Irmscher kit

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TC light comes on when accelerating hard at speed
15. Feb 2010 at 11:01

Anyone come across this at all?

The T/C has had a lot of use in the last couple of months with all the snow.

However, in the last 2 weeks when I've accelerated hard to overtake the TC light comes on and doesn't go off.

It clears after you have turneded the engine off and restarted.
Should I be worried - what can I check? Undecided

Anyone seen this before - common? Sad

Can anyone advise?

Matthew

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TheBoy Administrator Offline TBE has an MOT! Posts: 64817 Brackley, Northants Gender: Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10	Re: TC light comes on when accelerating hard at speed Reply #1 - 15. Feb 2010 at 11:10 Do a paperclip test anyway - I have a theory about 19s... Also wonder if this could be the start of ABS ECU failure...
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MV6Matt

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On 19's with 3 litre cams
and Irmscher kit

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London
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Drives: '98 2.5 V6 CDX Estate (in MV6 guise with lots of Irmscher)

Re: TC light comes on when accelerating hard at speed
Reply #2 - 15. Feb 2010 at 11:16

TheBoy wrote on 15. Feb 2010 at 11:10:

Do a paperclip test anyway - I have a theory about 19s...

>>>...oh yes?.....I have a bad feeling about this....... Sad

Also wonder if this could be the start of ABS ECU failure...
>>>......uh oh, I have a really bad feling about this....................... Cry

Ok ta

Matthew

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TheBoy

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Re: TC light comes on when accelerating hard at speed
Reply #3 - 15. Feb 2010 at 11:45

Before my crank sensor eventually died (outside Dijon, France), I'd had a few weeks with an orange light flickering on my dash when hoofing it. I thought it was TC one, but was so quick, never actually got to see which one it was.

Hence, if you do see a 19, that might be an easy fix. And best to get it done now, rather than at a more inconvenient time when you *REALLY* need the car.

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Dave-C

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Re: TC light comes on when accelerating hard at speed
Reply #4 - 15. Feb 2010 at 17:03

All the above I agree is well valid,

Just a thought though, with all the salt on the roads recently, I wonder if the abs stator teeth on the rear of the car could be contaminated.

I've noticed recently that when I use almost full throttle in sport mode it's as though the TC is kicking in by reducing the revs and spluttering a wee bit. I've cleaned the teeth off whilst checking the car over for an MOT, it seems to have cleared the fault, coincidence! Maybe.. Huh

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Road Hog Mad Intermediate Member Offline Posts: 381 Cheshire Gender: Drives: Rover 400 SLDi	Re: TC light comes on when accelerating hard at speed Reply #5 - 15. Feb 2010 at 19:04 don't mention abs ecu failure to me lol. seems quite common this. it may be worth a squirt of wd40 on the gear things at the back that do the abs etc?
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Dave-C Omega Knight Offline The Old Girl Posts: 1978 Staffordshire Gender: Drives: Mercedes 220 Cdi	Re: TC light comes on when accelerating hard at speed Reply #6 - 15. Feb 2010 at 19:40 Road Hog Mad wrote on 15. Feb 2010 at 19:04: don't mention abs ecu failure to me lol. seems quite common this. it may be worth a squirt of wd40 on the gear things at the back that do the abs etc? www.ecu-express.co.uk Just in case, some friends of mine run this business in Stoke-on-Trent...
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goonv6 Intermediate Member Offline Posts: 307 Drives: 1999 Omega 2.5 cdx estate	Re: TC light comes on when accelerating hard at speed Reply #7 - 15. Feb 2010 at 21:33 Yup, reckon its your ABS ECU.
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Andy H

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Re: TC light comes on when accelerating hard at speed
Reply #8 - 15. Feb 2010 at 22:10

TheBoy wrote on 15. Feb 2010 at 11:45:

Before my crank sensor eventually died (outside Dijon, France), I'd had a few weeks with an orange light flickering on my dash when hoofing it. I thought it was TC one, but was so quick, never actually got to see which one it was.

Hence, if you do see a 19, that might be an easy fix. And best to get it done now, rather than at a more inconvenient time when you *REALLY* need the car.

My 1994 V6 used to tie itself in knots once T/C cut in. I had to lift off to before it would stop kangarooing, don't know if it was related to soft diff mount bushes?

I wonder if a misfire caused by crank sensor problem could trigger the T/C on a pre facelift car? Undecided

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Previous vehicles: Viva, Chevette, Astra mk2, Carlton mk1, Astra mk2, Land Rover SerIII, Carlton Mk2, Range Rover, Omega 2.5 V6
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Marks DTM Calib Administrator Offline Ex Member Posts: 25671 Northern Hemisphere Gender: Drives: Astra J, Mum Bus, Dexta Tractor, 108 DMU wip	Re: TC light comes on when accelerating hard at speed Reply #9 - 15. Feb 2010 at 22:25 I woul have expected to see both TC and ABS lights on if the ecu was going
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MV6Matt Senior Member Offline On 19's with 3 litre cams and Irmscher kit Posts: 812 London Gender: Drives: '98 2.5 V6 CDX Estate (in MV6 guise with lots of Irmscher)	Re: TC light comes on when accelerating hard at speed Reply #10 - 17. Feb 2010 at 15:45 Marks DTM Calib wrote on 15. Feb 2010 at 22:25: I woul have expected to see both TC and ABS lights on if the ecu was going No - just the TC light - will try and get out and do the P/c test......................
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MV6Matt

Senior Member

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On 19's with 3 litre cams
and Irmscher kit

Posts: 812
London
Gender: male

Drives: '98 2.5 V6 CDX Estate (in MV6 guise with lots of Irmscher)

Re: TC light comes on when accelerating hard at speed
Reply #11 - 18. Feb 2010 at 09:17

Just done the p/c test and am getting a 21 code - (TPS) Voltage high.

I don't know how Throttle position sensors work but if I'm booting the car to over take (already at speed) is something staying in place rather than returning to a 'neutral' or default position once the input is over/finished?

Well, that's me mystified Huh

So folks - what say you peeps?

What needs fixing and how?

Matthew

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MV6Matt Senior Member Offline On 19's with 3 litre cams and Irmscher kit Posts: 812 London Gender: Drives: '98 2.5 V6 CDX Estate (in MV6 guise with lots of Irmscher)	Re: TC light comes on when accelerating hard at speed Reply #12 - 18. Feb 2010 at 09:18 TB - could this be something to do with your theory on 19's? Matthew
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MV6Matt Senior Member Offline On 19's with 3 litre cams and Irmscher kit Posts: 812 London Gender: Drives: '98 2.5 V6 CDX Estate (in MV6 guise with lots of Irmscher)	Re: TC light comes on when accelerating hard at speed Reply #13 - 19. Feb 2010 at 09:53 Any ideas folks?
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TheBoy

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TBE has an MOT!

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Brackley, Northants
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Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10

Re: TC light comes on when accelerating hard at speed
Reply #14 - 19. Feb 2010 at 11:53

MV6Matt wrote on 18. Feb 2010 at 09:18:

TB - could this be something to do with your theory on 19's? Huh

Matthew

No. But worth paperclipping once a week or so, just to keep an eye on if that pesky 19 appears.

Worth looking into the TPS - the engine and ABS ECUs talk a lot, and I reckon a flickering TC light was the warning sign of my crank sensor. So its possible the engine ecu is upsetting/confusing the ABS ecu when running in an 'error/recovery' program.

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