Traction control on Defender TD5

[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

[lambrover]

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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[d@rk51d3]

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


Just checking.:angel::D

[djam1]

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

[lambrover]

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

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[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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[Yorkshire_Jon]

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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[djam1]

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.

[djam1]

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


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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[Flaps]

Mate i have the same problem with my car i have a 2004 110 extreme i tested my tc with hawkeye and couldnt get my wheels to brake i could hear the valves working but the wheel keeps spinning. My car hasnt been remapped. Iv given up

[Yorkshire_Jon]

If Gary has remapped it, it'll be right.

With that in mind, IF TC isnt working, I'd suggest your looking in the wrong place. That said, I'm not sure were else to start looking.

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[Yorkshire_Jon]

With opposing wheels spinning TC should cut in and allow the ATB to do its thing and forward progress commence.




Silly question of the day... What's "ATB" ??

R
Jon

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[Tombie]

Considering TC isnt in the ECU I cant see the problem being there.

As for "bricked" ECUs.. They can be unbricked quite cheaply...

Send it to Gary (Alive) or Pete (BAS)

[djam1]

Mike
There are 2 feed wires from the ECU to the WABCO ECU
Does the mapping have the ability to remove the feed hence the TC would stop working.

From RAVE relating to traction control

The ECM provides the ABS ECU with a Pulse Width modulated (PWM) Signal on an SP wire. This signal includes information on engine torque, engine throttle, engine type and throttle type.

The ECM provides the ABS ECU with pulsed voltage signal on a YK wire. The signal informs the ABS ECU of engine speed, The ECM provides the ABS ECU with two voltage pulses per engine revolution.

[djam1]

Silly question of the day... What's "ATB" ??

R
Jon

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Jon
The Ashcroft equivalent to a trutrac

[Tombie]

Mike
There are 2 feed wires from the ECU to the WABCO ECU
Does the mapping have the ability to remove the feed hence the TC would stop working.

From RAVE relating to traction control

The ECM provides the ABS ECU with a Pulse Width modulated (PWM) Signal on an SP wire. This signal includes information on engine torque, engine throttle, engine type and throttle type.

The ECM provides the ABS ECU with pulsed voltage signal on a YK wire. The signal informs the ABS ECU of engine speed, The ECM provides the ABS ECU with two voltage pulses per engine revolution.

The Engine Mapping area is a very small area (~16k) which is the only file area touched when tuning.

The tuners (units) only target this area...

Other sections of the board are not even accessed.

[Yorkshire_Jon]

The Engine Mapping area is a very small area (~16k) which is the only file area touched when tuning.

The tuners (units) only target this area...

Other sections of the board are not even accessed.

Yep. That's why I suggested it wouldn't be the map.

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[djam1]

Mike
Thanks for your input but what about this thread http://www.aulro.com/afvb/90-110-130-defender-county/148779-td5-traction-control-light-wont-go-off-after-new-ecu-fitted.html

Tends to suggest otherwise??


The Engine Mapping area is a very small area (~16k) which is the only file area touched when tuning.

The tuners (units) only target this area...

Other sections of the board are not even accessed.

[Yorkshire_Jon]

Mike
Thanks for your input but what about this thread http://www.aulro.com/afvb/90-110-130-defender-county/148779-td5-traction-control-light-wont-go-off-after-new-ecu-fitted.html

Tends to suggest otherwise??



From memory Josh was running a Disco ecu when he had his problems... Swapped back to a Defender and all ok again.

Disco's use a different ABS system, hence his didn't work.

If you read right to the end I think he says what the problem was, unless he told me that via PM, not sure.


R
J

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[djam1]

Jon
Its the same ECU at least manual Disco and Defender NNN500020
The change in MAP had an influence on the ABS true they do have a different ABS system

[Yorkshire_Jon]

Jon
Its the same ECU at least manual Disco and Defender NNN500020
The change in MAP had an influence on the ABS true they do have a different ABS system

Just cos it's a NNN500020 doesn't make it the same as your old one. Sure the hardware is the same, but I'd it came out of a Disco and you've just put a fuel map on, then there's your problem.

The fuel map is not the problem. Did you get a new map on a new ecu at the same time, or are you saying the ecu you have now was running ok before the map went on?

It sounds like it could need a complete flash to make it into a defender one rather than a Disco.

Back to Pete (BAS) or Gary to work some magic.

J

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[djam1]

Jon
Mine isn't a Disco one It was purchased new and setup for a Defender
The bloke that did it was a bit sus though
Duane

[djam1]

For future reference
I am pretty sure I have faulty Modulator
I just found out while driving on a dirt track when it jammed the front brakes on.
A bit scary
Not sure now do I pull the ABS system out and revert to standard brakes.
Or suck it up and get the Modulator repaired

[djam1]

Problem solved Jobson Electronics in Carlton reconditioned the Modulator.
All seems well evidently the pistons in the Modulator stuff up along with other things.
So I get a reco Modulator with 4 years warranty for a grand or so.
The new one has 12 Months warranty and costs 4 times as much