Yet another 3 amigos question
 

I recently got a Hawkeye diagnostic tool, which I'm hoping will be helpful with ABS-related stuff and brake bleeding, among other things. I hooked it up and read ABS codes, and it turned up "fault 4114 historical shuttle valve switch failure."

From what I can tell this is likely the classic 3 amigos issue. Do others concur? It seems I have a couple options: do an electrical hack or buy a new shuttle valve assembly for around $80 and hope it's not some other issue with the brake/wheel speed sensors. A couple questions for those in the know:

1) Are there additional steps I should take to isolate this as a shuttle valve issue, or does this fault code itself confirm that the fix is to replace/hack the valve?

2) Taking cost out of the equation for the moment, how would you compare option B here (ABS Mod - LAND ROVER CLUB V.I.) with replacing the shuttle assembly? Is replacing the assembly a less-permanent fix than option B?

Thanks, and sorry to dredge up something that's been covered so heavily already.

The Option B bypass and shuttle valve replacement address two different problems, either of which will trigger the code you report.

In my case I inspected and tested the switches per the Option B procedure. There was no brake fluid evident on them and electrical resistance passed the tests.

Some recommend going ahead and replacing the switches regardless but I'm something of a tightwad so I took the risk that the switches would fail later and I would have to spend and hour and a hundred bucks later to replace them. So far so good - five and a half years later.

https://landroverforums.com/forum/di...abs-mod-38632/

Ah, ok, I think I get it. So if I go through the testing procedures on the Option B website and the shuttle valve doesn't pass, then I definitely need a new shuttle valve. If it does pass, then I know it's not the shuttle valve and Option B will solve it. I could optionally replace the shuttle valve while I'm there AND do Option B, but that costs more money.

That about right?

Yes, that's it. But in addition to testing resistance with an ohm meter be sure to carefully inspect the switches for any sign of brake fluid having leaked onto them.

Defo worth replacing the shuttle valves block and doing the mod B but I bought mine already modded on Ebay with a slightly better mod bypass. Not cheap but has never caused any further problems in 3 years ............... yet ;)

Or you can fix the Amigos yourself for an hour or two of your time, a $4 part (if that much), a soldering iron and solder plus a little heat shrink tubing. And if you want to be really fancy you could add a ring or spade connector for the ground connection.