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Author Topic: TC light comes on when accelerating hard at speed  (Read 3605 times)

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MV6Matt

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TC light comes on when accelerating hard at speed
« on: 15 February 2010, 11:01:56 »
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? :-/
Anyone seen this before - common? :(

Can anyone advise?

Matthew
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TheBoy

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Re: TC light comes on when accelerating hard at speed
« Reply #1 on: 15 February 2010, 11:10:46 »
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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Re: TC light comes on when accelerating hard at speed
« Reply #2 on: 15 February 2010, 11:16:53 »
Quote
Do a paperclip test anyway - I have a theory about 19s...

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

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

Ok ta

Matthew
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TheBoy

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Re: TC light comes on when accelerating hard at speed
« Reply #3 on: 15 February 2010, 11:45:07 »
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 on: 15 February 2010, 17:03:14 »
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..  :-?
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Road Hog Mad

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Re: TC light comes on when accelerating hard at speed
« Reply #5 on: 15 February 2010, 19:04:53 »
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?
« Last Edit: 15 February 2010, 19:06:31 by pjwright »
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Re: TC light comes on when accelerating hard at speed
« Reply #6 on: 15 February 2010, 19:40:18 »
Quote
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... :y

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goonv6

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Re: TC light comes on when accelerating hard at speed
« Reply #7 on: 15 February 2010, 21:33:36 »
Yup, reckon its your ABS ECU. :P
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Andy H

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Re: TC light comes on when accelerating hard at speed
« Reply #8 on: 15 February 2010, 22:10:21 »
Quote
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?  :-/
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Marks DTM Calib

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Re: TC light comes on when accelerating hard at speed
« Reply #9 on: 15 February 2010, 22:25:06 »
I woul have expected to see both TC and ABS lights on if the ecu was going
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MV6Matt

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Re: TC light comes on when accelerating hard at speed
« Reply #10 on: 17 February 2010, 15:45:26 »
Quote
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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Re: TC light comes on when accelerating hard at speed
« Reply #11 on: 18 February 2010, 09:17:21 »
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 :-?
So folks - what say you peeps?

What needs fixing and how?

Matthew

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MV6Matt

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Re: TC light comes on when accelerating hard at speed
« Reply #12 on: 18 February 2010, 09:18:42 »
TB - could this be something to do with your theory on 19's? :-?
Matthew
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MV6Matt

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Re: TC light comes on when accelerating hard at speed
« Reply #13 on: 19 February 2010, 09:53:26 »
Any ideas folks?
 :)
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TheBoy

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Re: TC light comes on when accelerating hard at speed
« Reply #14 on: 19 February 2010, 11:53:53 »
Quote
TB - could this be something to do with your theory on 19's? :-?
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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