Thread: Defender TD5 ABS and TC help

Originally Posted by jbe

Been there, mate.
Firstly, I think you will need a diagnostic tool like Nanocom or Hawkeye to properly diagnose the issue. If you start randomly replacing bits, it can become very expensive very quickly.
To be honest, the Wabco ABS/TC system in the Defenders is a fairly crappy design.
It could be one of the ABS sensors which should log a fault in the ECU.
It could also be the shuttle valve or the ABS pump in the modulator. A new modulator is about $3500 for the Defender afaik. The Disco modulator is differently valved from the Defender module.

I had a dead pump and my workshop managed to seperate the valve body and use a reconditioned pump from a Disco unit; much cheaper and still works one and a half years later.

My learning curve ion this subject was very steep & expensive :-).

Land Rover ownership is very steep and expensive! Lol. I have wanted to buy a Nanocom for ages but just never have the money as I am always having to fix other things first. This is the first time I have needed to read a fault or ECU in 4-5 years of ownership

Originally Posted by Scotty85

Do you reckon I could just remove the Shuttle Valve with all the pipes and modulator still in place? If this was possible then would I still need to bleed the brakes? I do a brake fluid change. It is due but without a scan tool then that makes it hard.

I have bought from allfourx4 before. They are good as is Roverlord. No shortage of places or shops to buy our stuff!

I am getting onto Jobson about this thoughts and his fix but based on what the LR specialist told me (didn't give me the fault code) it is just the Shuttle Valve so hopefully no need for the "whole hog fix" lol.

The only way I can see of getting the shuttle valves out in a Defender without undoing the pipes would be to either remove the mudguard or attack the body with an angle grinder.
If you did manage to do it you might still need to bleed it not sure.

Just bleed the brakes. Get a pressure bleeder that either is pressurised by an air line or uses a hand pump. This will always do the best job possible for a home / shade tree mechanic.

Members with Diagnostic Equipment map (updated 1/2015)

Members with Diagnostic Equipment map (updated 1/2015)

The discovery complete modulators fit and are the same. Perform option b and the fault is gone forever.

The disco modulators are very cheap second hand compared to a defender one...

Jc

Originally Posted by justinc

The discovery complete modulators fit and are the same. Perform option b and the fault is gone forever.

The disco modulators are very cheap second hand compared to a defender one...

Jc

When I looked into it, the ports were labelled differently between Disco and Defender modulator units on the images I looked up. Are you saying that the brake lines into the ABS modulator block, i.e. FL RR FR RL between the disco and Defender units?

Weve done quite a few now... no issues there.
Jc

Originally Posted by justinc

Weve done quite a few now... no issues there.
Jc

Really? Is there an actual difference between the Defender and Disco units besides the location of the brake line ports? I know the Disco has the 3rd "Hill Assist Function". I would have thought the ABS brakes would not apply the brake to the correct wheel if the port was routed to the wrong port? I wonder why Land Rover would make the Modulator's different between the 2 types of vehicles if they both worked exactly same? To make extra $$?