Thread: ABS Modulator Electrical Fault Repair (option B)

Option "b" only bypasses a possible dry joint in the shuttle valve to ABS loom connector. If your vehicle doesn't have this dry joint / broken solder or track, it won't fix anything.

A fault in a sensor, abs unit or shuttle valve will still give you the Amigos.

If you are sceptical it is because you do not understand the system, the fault and therefore the fix. Which is not an insult or a jibe It takes a bit of time to get your head around.

It is particularly important that you understand what you are about to do and why you are doing it.
As d@rk51d3 has already said, if you dont know the fault dont just try something that may not be appropriate for your problem.

If after reading the "good Oil" and the info to trouble shoot and after doing all the checks with Earths, Diagnostics, etc you find yourself with the remaining Option B, you find yourself still sceptical, I recommend leaving it to a Landy mechanic to sort for you.

Having said that the simple answer to your specific question is yes.

cheers

Most commercial LR mechanics wont do option b for you due to insurance issues. (i.e its not a reccomended procedure and lets face it you are altering the internals of the modulator).

My nanocom recorded the fault as "intermittant electrical fault in shuttle valve" which points to the crack in the circuit board being you problem which option b will fix.

I did mine and found it an easy job if you follow the steps and take your time.

3 amigoes have not returned since!

cheers

Hi,
I did mine a couple of years ago & it worked a treat - 2000 d2 TD5. I was getting the 3 amigoes every day especially when parked in the sun. Now hardly ever maybe once every 6 months when the brakes squeal as I don't have LR pads. Try it - it's worth it - if (as said before) that is the problem. I had replaced the shuttle valves before I tried option B without success so I didn't see any other viable option. Only difference I did from option B was not cut the original wire - I joined onto it to have a "T" junction - in my mind it was to avoid the legal issues . I also have a Nanocom whcih makes it easier to reset things & bleed the brakes.

hope this helps
Regards
Steve

Hi All,
Thanks for your responses. The original fault report indicated that it was the shuttle valve, however I'll do some more investigations with my mechanic just to be sure and see where this takes me.

If thats the case, then its probably worth popping out the shuttle switches and checking the resistances. If they check out ok, then option b may be an option.

Here is something that I dont think has been mentioned on here before. As we all know, the first things to check are fuses, wiring and circuts etc. However most of us don't, ........admit it.........you don't. Well me niether.

After carrying out the replacement of the shuttle valve assembly my amigo's were gone ............. for a week.

It was then I decided to go back to basics and begin to check things properly. After just a few visual inspections it became apparent the the yellow/green wire in the abs pump connector that is spoken about in the optional fixes was loose in the connector and did not feel securely connected to its oposing terminal.

I removed the yellow/green wire (and terminal) from the connector and carefully made some adjustments in order to tighten the terminal in the connector housing. I also made some very small and carefull tightening adjustments in order to ensure that the male and female sides of the terminal were a nice tight connection.

Since doing this small and very easy fix (not to mention free) my beloved amigos have not revisited for about 12 months. I am sure they will one day just because they can, but they haven't yet.

I have provided a picture of the connector and the yellow/green wire which is the clostest wire to you in the picture. If you hold on th the wire with your fingers and gently pull it in and out of the connector you may just find that yours is quite loose to. Definately worth a look, good luck.

Thanks Davrac. Salutory reminder not to run straight off to a kneejerk option b. Cheers