diagnostics shuttle valve electrical fault..

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J

jay572

New Member
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liss hampshire
had the three amigos come up on my 2001 discovery td5 had a diagnostics test done said it was shuttle valve electrical fault. how easy is this to fix?? and how much are the parts to fix it roughly??? is it normally the circuit board inside the abs modular or is it normally the actual plungers to the shuttle valves??? any help would be great....:)
 
Hi Jay

I fixed mine just before Christmas for free. The common problem seems to be a dry joint on the pins in the modulator. The switch plugs into them.

The fix is to take the switch off and solder some more wires on, then connect one to earth and one directly into the loom coming off the modulator.

There is a website with details on doing this but I'm not on my regular computer right now so don't have the bookmark. If you can't find it let me know and I'll get if for you tomorrow.

Regards

Ben
 
that would be great if you could.. think i might of read it somewhere cant remember were, the switch inside the modulator goes wrong and he wired it passed it, has it worked ok for you?? how did you know it was defeniatly that?? cant find it now!!!
 
I kept getting the fault codes for intermittent shuttle valve (electrical) failure and all other wires and connections looked good and given it is a common problem I figured spending 30 mins doing this fix was going to be a good bet. It took more like an hour by the time I did it all in the end I think.

Been great to have the dash without any warning lights on :) No problems since. I have checked for error codes and come up with none, so seems to have been a good fix for me.

Regards

Ben
 
ok cool thanks for that will give it ago. i should only have to remove the svs to do the modification not the actual modulator as well
 
eightinavee said:
This might help; ABS Mod - Land Rover Club V.I.
I dont bother undoing all the brake pipes,(Hate brake fluid/bleeding brakes etc.) I just prop the modulator up on a block of wood.
It does fix them.;)
Click to expand...

That looks like the one I used, option B in that link.

I was able to support the modulator on it's own bracket without any trouble, as eightinavee says certainly no need to disconnect any pipes, so no bleeding needed afterwards!

Regards

Ben
 
hi sierrafery i will probably do that bypass on the website you gave. diagnostics come up with shuttle valve electrical failure. so will double check it is defiantly the little circuit board in the modular as shown on that web site then bypass it. prob is as of yet the lights haven't come back on since i changed the discs and pads all round although im sure the amigos will reappear soon!!!!!
 
Hi Sierraferry,
What do you mean by a mod?
I have just had mine tested and the guy in the landrover garage says I will need a new shuttle valve (700 Omani rials which translates to near a grand in sterling)
If I look at the pins in the modulator do you know if this will fix the problem, or do I need to know the exact fault codes before deciding what to do?
Cheers.
PS - the link you provided doesn;t seem to work anymore.
 
Good Morning All,
Just had 3 amigos come on my 04 Td5 disco,
I am a novice when it comes to mechanics, so please bare with me.
My fault seems to be intermittent, I drove all round derbyshire the last monthand nothing, stopped at fuel station as you do, and come to start up and they came on. Following week no lights, but came on again just today, turned ignition off and on and the lights went out.
I have read that it's ok to drive around with the amigos on and that the abs,TC, HDC work as they should with the lights on?
Also, and sorry if a repeat threads and posts on here, but once you have changed the shuttle valves do the lights come back on if you don't clear the codes with a hawkeye etc?
Thanks for your patience
Andy
 
HI, if you do the SVS mod option B and the fault was due to SVS(probably based on the symptoms) you'll not need anything as long as the fault doesnt become permannent before the mod
 
hello guys,
as I understand, buying a new SWO500030 doesn't make sense? It will not fix the problem?

sierraferry, this problem is only in connections, not in the switch itself?
 
@sandu
Usually, but not always, the SVS electrical fault is due to one of the two pins on the connector inside the ABS modulator developing a dry joint to the little printed circuit board and not a fault on the switch plate at all.
While it would seem that replacing the switch plate in that condition might not be worth it, replacement would seem to be "good practice" while you're installing the modification, seeing as how you've gone to the trouble of removing the old one.
The ABS modification you've probably read about is just a method of bypassing these connectors. There's no need to remove or disassemble the ABS modulator, just carefully lift it away from it's working position with all pipes still connected so that you can gain albeit restricted access to the three bolts securing the switch plate underneath the modulator.
I've attached a copy of what's often referred to as "Option B" which also shows how to test the switch plate. I've also added another attachment (DISCO ABS FAULT) to give you some ideas about how to go about the job, in that attachment, there's no need to leave the socket in place, it can only lead to problems if you should get the wiring the wrong way round.
Since the modification is unofficial, most garages will be somewhat reluctant to install it for you, preferring to supply and fit a new ABS modulator instead.
 

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