Thread: Traction control on Defender TD5

Originally Posted by djam1

I have a situation where my 2002 Defenders traction control doesn't work
ABS works fine but no TC my suspicion is that the MAP file I have may be for a non TC TD5 Defender.
I have checked everything I can think of all wiring seems sound.

Rave states that there are 2 wires running from the ECU to the ABS ECU feeding it with information my assumption is that this is not happening
No errors in ECUs

Anyone had this scenario before

I think they have a couple of relays in the circuit try testing them, if faulty replace.

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It wouldn't happen to be a 130, would it?


Just checking.

Thanks guys
No its a 110 Extreme
I have checked out all the electrics and they seem fine
Testing all the functions with the Nanocom check out OK

By the sounds of your OP have you had the ECU re mapped.

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How do you know the ABS is working and the TC isn't? Usually it both that stop together.

If Nanocom isn't reporting current or historical faults, I'd suggest 2 more checks:

1. Lift each wheel off the ground one by one and engage 1st gear, when the wheel rotates the speedo should move. I'd expect each wheel to move the speedo as you say the ABS is working. I not you have a fault somewhere in the wheel that doesn't move the speedo.
2. Remove each sensor from the hub to check for dirt and swarf on the sensor magnet / end? From experience, a small amount of mud / swarf will distort / block / reduce the signal and cause problems. The design of the rear sensor mounts isn't as good as the fronts, more prone to mud intrusion so I'd start there.

HTH
J
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Originally Posted by lambrover

By the sounds of your OP have you had the ECU re mapped.

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If someone has remapped the car and in the process stuffed it up to the extent the ABS/TC no longer works they want shooting cos they clearly don't know what they're doing!

J

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Gary from TD5 Alive did the map and he knows what hes doing and I trust him.
I sent him an email asking if he made a mistake and am yet to hear back.
What really gets to me is I tried to put an original map back on my brand new ECU to discover that the Nanocom froze and bricked its second ECU.
My efforts to prove that the map is the issue was getting too costly
I am pretty much over Nanocoms at the moment as the ECU cost $1250 each
I might try an ATRIC from TD5 Alive to save frustration in the future.

Jon
To answer your question travel at high speed on a dirt road and jamb your foot on the brakes ABS will kick in.
The only reason I checked the TC was I fitted and Ashcroft ATB yesterday and went to test it.
With opposing wheels spinning TC should cut in and allow the ATB to do its thing and forward progress commence.
I did all the tests you mentioned with Nanocom and seated the wheel sensors.
Almost like there is no signal from the engine ECU

Of course it may all be unrelated and coincidence with the mapping
What I don't understand is how ABS can work and TC not doesn't even make sense

Originally Posted by Yorkshire_Jon

How do you know the ABS is working and the TC isn't? Usually it both that stop together.

If Nanocom isn't reporting current or historical faults, I'd suggest 2 more checks:

1. Lift each wheel off the ground one by one and engage 1st gear, when the wheel rotates the speedo should move. I'd expect each wheel to move the speedo as you say the ABS is working. I not you have a fault somewhere in the wheel that doesn't move the speedo.
2. Remove each sensor from the hub to check for dirt and swarf on the sensor magnet / end? From experience, a small amount of mud / swarf will distort / block / reduce the signal and cause problems. The design of the rear sensor mounts isn't as good as the fronts, more prone to mud intrusion so I'd start there.

HTH
J
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