Over Sensitive Traction Control - Disco 2

56er · Dec 30, 2020

Hi Everyone.
I'm new to Landy Zone.
My 2001 Discovery 2 has developed an over sensitive issue with traction control. I've had the vehicle for 4 yrs, replaced hubs/bearings/sensors all round 2-3 yrs ago, problem started 9-12 months ago. TC activates on slippery mud too soon but also activates when cornering slowly on normal roads where there may be the slightest unevenness. I've tested all four sensors, they all read ~1000 ohms.
None of the usual warning lights are on.
Any ideas anyone?

sierrafery · Dec 30, 2020

Hi, that's how it behaves when there's a missballance between inputs which can be caused by mixed sensor/hub brands also cheap aftermarkets are not very similar even if they are the same brand, tyre pressures are not the same as recommended in the book or different than the recommended dimensions, the bigger the tyres are the more sensitive the system becomes. As the sensor's resistance is withing accepted llimits the system passes the self test and doesnt register a fault but at a certain speed the sensor's inputs are becoming different enough for the system to consider it wheel slip and activate TC... all you can do is to change at least the sensors with wabco which are more reliabe unless you change hubs in pairs with some good brand ones starting with the front. Remember, once you change a hub keep in mind it's brand and always buy the same when for other corner is needed

56er · Jan 2, 2021

sierrafery said:
Hi, that's how it behaves when there's a missballance between inputs which can be caused by mixed sensor/hub brands also cheap aftermarkets are not very similar even if they are the same brand, tyre pressures are not the same as recommended in the book or different than the recommended dimensions, the bigger the tyres are the more sensitive the system becomes. As the sensor's resistance is withing accepted llimits the system passes the self test and doesnt register a fault but at a certain speed the sensor's inputs are becoming different enough for the system to consider it wheel slip and activate TC... all you can do is to change at least the sensors with wabco which are more reliabe unless you change hubs in pairs with some good brand ones starting with the front. Remember, once you change a hub keep in mind it's brand and always buy the same when for other corner is needed

Thanks @sierrafery. The hubs and sensors are all reputedly the same brands. The issue has developed well after they were all replaced. Very frustrating. Can anyone recommend any tests to identify which corner may be at fault?

Stanleysteamer · Jan 2, 2021

56er said:
Thanks @sierrafery. The hubs and sensors are all reputedly the same brands. The issue has developed well after they were all replaced. Very frustrating. Can anyone recommend any tests to identify which corner may be at fault?

Buy a Foxwell, or take it to a garage with a decent diagnostic, not the one i went to which got the axle right but the side wrong!

I replaced the hub they said, then ....well long story short ..replaced both and bought a Foxwell!

sierrafery · Jan 3, 2021

The only way is to watch live sensor inputs while driving to see which wheel jumps out of the range when the symptom occurs but this is possible only with very few tools, for example nanocom will cut out when the vehicle exceeds 7km/h. Can't you feel which wheel is braking when the TC kicks in ? as the hubs are all the same brand are you sure they all have 60 teeth on the ring not 55 as the system was calibrated for 60 and there are cheap hubs with 55. What dimension tyres you have at which pressures ?

Over Sensitive Traction Control - Disco 2

56er

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sierrafery

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56er

New Member

Stanleysteamer

Well-Known Member

sierrafery

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