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pumaxs

Member Since: 18 Jul 2012
Location: Bath
Posts: 180

2007 Defender 110 Puma 2.4 XS CSW Zambezi Silver

Daft Question, But...

...I'm not convinced that traction control is working correctly (or I am using it correctly!).
By way of a not particularly scientific test, I attempted to drive up a suitably muddy slope, where I was more or less guaranteed to lose grip - Especially on wheels still shod with the standard issue Grabber TR's!!
In low 2nd gear, with the diff lock engaged, the NSF wheel duly started spinning and the TC light on the dash lit up.
Keeping my foot on the throttle, I waited to hear the various 'clicks' & 'clunks' as the ABS braked the spinning wheel & TC started its search for grip.
But nothing happened, and the wheel just kept on spinning.
The ABS + TC dash lights illuminate + extinguish on start up, and the ABS braking works as expected - Having tested it on a big patch of wet leaves!
What am I doing wrong!!!!!

'57 Defender 110 XS Station Wagon 2.4tdci

28th Nov 2012 5:01pm

LandRoverAnorak

Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240

2013 Defender 110 Puma 2.2 USW Orkney Grey

Did you actually stop moving? These things work on differences in wheel speed and it's possible that the difference between the spinning one and the others wasn't great enough to kick the system into life. IME these TC systems need a 'determined' throttle to provoke them. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia

28th Nov 2012 5:11pm

pumaxs

Member Since: 18 Jul 2012
Location: Bath
Posts: 180

I was stationary with the wheel spinning - Waiting for the 'magic' to begin!!
I do realise that there might not have been any grip to find - It would just have been nice if it'd had a look!! '57 Defender 110 XS Station Wagon 2.4tdci

28th Nov 2012 5:16pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 7695

2011 Defender 110 Puma 2.4 USW Stornoway Grey

how many wheels were spinning?

did you maintain or increase throttle position

vehicle speed on the speedo? Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop

28th Nov 2012 5:35pm

pumaxs

Member Since: 18 Jul 2012
Location: Bath
Posts: 180

jst wrote:
how many wheels were spinning?

did you maintain or increase throttle position

vehicle speed on the speedo?

NSF definitely spinning.
OSF & OSR not spinning - as stuck head out of window!
NSR pretty sure not spinning.
Didn't think to look at speedo.
I can repeat the experiment & get an outside observer to view all wheels '57 Defender 110 XS Station Wagon 2.4tdci

28th Nov 2012 5:42pm

LandRoverAnorak

Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240

pumaxs wrote:
I was stationary with the wheel spinning - Waiting for the 'magic' to begin!!
I do realise that there might not have been any grip to find - It would just have been nice if it'd had a look!!

Hmm, ok. There's no way you could be stationary with diff-lock engaged and only one wheel spinning, but even so I would have expected the TC to do something in that situation. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia

28th Nov 2012 5:58pm

pumaxs

Member Since: 18 Jul 2012
Location: Bath
Posts: 180

LandRoverAnorak wrote:
pumaxs wrote:
I was stationary with the wheel spinning - Waiting for the 'magic' to begin!!
I do realise that there might not have been any grip to find - It would just have been nice if it'd had a look!!

Hmm, ok. There's no way you could be stationary with diff-lock engaged and only one wheel spinning, but even so I would have expected the TC to do something in that situation.

Right, I will repeat the experiment in the light with an observer to confirm what is happening on each corner!
In any case, I was expecting something to be happening underneath.
I was (deliberately) put in a cross axle situation, at one of the Land Rover Experience Centres (in a 2012 Defender 110), and the noise created as the TC (?) resolved the situation was pretty noticeable.
Anyway, I'll shut up for now. '57 Defender 110 XS Station Wagon 2.4tdci

28th Nov 2012 6:18pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 7695

if difflock is in, one of the front and one of the rears will btoh be spinning.

i dont think ETC works below 8kph (of wheel not road speed) although i would have to check this.

if you accelerate to increase the speed of the spinning wheel(s) the ETC will work more effectively as it will react quicker to the greater wheel speed differentiations. Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop

28th Nov 2012 9:48pm

Glynparry25

Member Since: 16 Feb 2009
Location: Miserable Midlands
Posts: 3015

2009 Defender 110 Puma 2.4 XS DCPU Tonga Green

OK,

When you lost traction and spinning did the light (TC) illuminate on the dash?

Aslo, when you say you kept on the accelerator- did you ease off at all? I find that on mine if the wheels are spinning too fast it won't engage the TC........ Which is good as if your 'spinning' wheel is doing about 20mph and the brake is applied to that wheel and your 'non-spinning' wheel has good grip you could say good by to either your diff or half shaft.

When losing traction, ease off the accelerator and see what happens. I think the TC has a top speed limit too (Differetion speed between wheels).

I knew mine was working 100% when in the snow I put it in low 1st and let it go (about 2-3' snow drifts). On tickover (Anti-stall) I was able to get out and watch the truck slowly creep forward as it moved the power around the wheels.

Regards,
Glyn

29th Nov 2012 11:43am

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 7695

Glynparry25 wrote:
OK,

the brake is applied to that wheel and your 'non-spinning' wheel has good grip you could say good by to either your diff or half shaft.

or caliper bolts! dont ask!

that was with the siemens system though not Bosch which i think is far superior. Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop

30th Nov 2012 6:08pm

Glynparry25

Member Since: 16 Feb 2009
Location: Miserable Midlands
Posts: 3015

jst wrote:

or caliper bolts! dont ask!

that was with the siemens system though not Bosch which i think is far superior.

I have to ask.... WTF happened?

Glyn

1st Dec 2012 3:14pm

pumaxs

Member Since: 18 Jul 2012
Location: Bath
Posts: 180

Was in MJ Fews service dept last week about another matter, and mentioned that I didn't think the traction control was working properly + asked a few questions about its workings.
The technician reiterated the previous advice given, that any fault in the system would cause the ABS + TC dash lights to permanently illuminate, but that he would plug in the diagnostics & take a look.
Anyway, ten minute later he appears smiling & says that diagnostics are throwing up a fault code on a rear abs sensor failure.
So, it is possible to have a braking fault lurking in the system & not be made aware of it.
I will test TC again when the sensor has been replaced. '57 Defender 110 XS Station Wagon 2.4tdci

17th Dec 2012 5:16pm

pumaxs

Member Since: 18 Jul 2012
Location: Bath
Posts: 180

17th Dec 2012 5:16pm

limbrickh

Member Since: 05 Oct 2012
Location: Canterbury
Posts: 20

2012 Defender 110 Puma 2.2 XS CSW Santorini Black

Traction Control seems to only work within each axle

I just had my 2012 2.2 Puma (equivalent to XS spec with TC and ABS) on a steep sandy boat ramp (with a boat on the back). The rear wheels were on hard sand and the front wheels were on a wooden boat ramp with scattered loose sand coating it.

With low range engaged (no centre diff lock) the Defender just sat there spinning both its front wheels. No power was going to the back wheels. Knowing that TC needs revs to operate, I increased the throttle till smoke was coming from the front wheels - still no movement from the rear wheels.

I engaged the centre diff lock and the Defender went straight up the ramp with no wheel spin at all.

Does TC only work within an axle and not between the front and rear axles? If so, no wonder they added the centre diff lock to the later Disco Series 2s - or is there a fault with mine? Recently I have noticed that it does seem too ready to spin its front wheels on steep hills.

Thanks

Hamish

2nd Jan 2013 9:45am

limbrickh

Member Since: 05 Oct 2012
Location: Canterbury
Posts: 20

I forgot to say that the TC light was illuminated on my dashboard when the 2 front wheels were spinning.

I didn't notice the speed on the speedo but the front wheels were spinning fast.

2nd Jan 2013 10:12am

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