The dreaded three amigos

I am having a nightmare with my 03 Td5, the three amigos just don't seem to want to go away

I have had the following replaced so far:

Front nearside wheel hub (other was fine on inspection so not replaced)
New track rod end
New shuttle valve switch
New back discs and pads
All abs sensors have been checked and work fine along with the front brakes

......but the lights still appear, mainly when hitting a pot hole or bump in the road. ..I am getting very frustrated with these now.

Does anyone have any other suggestions as I am now lost or should I just live with it???

Any advice would be greatly appreciated.

but did you read the fault code?...cos that's the way to go...how did you check the sensors without tester to know they work?...also if the amigos reset ALL on ignition cycle it's most likely SVS fault see this http://www.landyzone.co.uk/lz/f8/good-old-svs-fault-dtc-4114-a-284703.html

The reading said shuttle valve switch which has been replaced. Could the new one also be faulty? Been in approx for weeks now.

The garage checked the sensors so I am not sure what they did. ...

replaceing the SVS pack might not be of any help cos the problem is with the contacts to earth or inside the modulator... do the wiring mod to rule it out completely

Thanks, will try it

Did you put a new shuttle valve switch in or repair the old one

The SVS issue was explained many ways but never this way, i edited the internal diagram of the ABS modulator concentrating on the SVS module(SWO500040), i marked where IMO the problems usually are with orange circles but in case of oil ingress to the switches those resistances(with red) will be affected and the fault is the same, with purple are the external wires of mod option B, blue is the switch pack(SWO500030), there are two important notes on the original scheme:
* TOTAL RESISTANCE INCLUDING CONTACT AND CRIMP RESISTANCE: R<0.017 OHMS for the connection which gives the main earth(that big earth connector below the multiplug
**TOTAL RESISTANCE INCLUDING CONTACT AND CRIMP RESISTANCE: R<0.04 OHMS on the refference earth(ground) circuit from SLABS to pin 8 of multiplug



these resIstances are measured from plugs to SVS pack so modulator internals included

so there will be SVS related fault code if the resistances of the switch pack are out of range(which from MY experience is rare) and if one or both of those two earth circuit resistances are out of that "tight" range(thats the most common IMO), so taking with external wires the switch pack in series between earth and the SLABS ECU's SVS input the internal circuit of the modulator is bypassed and the only case in which the 3 amigos will come on again is if the switches will be ruined by fluid ingress ... that's why i'm saying that the brake fluid ingress is not the most common issue cos many of those who made option B didnt replace the valve seals, some of them nor the switch pack just made the wiring mod and they haven't seen the 3 amigos generated by SVS fault code again...i hope it makes sense

MAGNIFY ATTACHMENT

The SVS electrical fault is most usually caused by a dry soldered joint inside the ABS modulator unit.
The wiring from the multiway plug on the ABS unit to the shuttle valve switch panel is connected to a small circuit board onto which the two pin connector on the SVS panel fits becomes detatched. Direct repair of the connector board is to say the least difficult. The easiest way effect a repair of the system is to deploy the "option B" modification referred to by Sierrafery in the post above.

Thanks, this is all really helpful.

The shuttle valve has been replaced for a new one.

Another theory that I have just read is a faulty master cylinder? I am not sure if this has been checked on my landy, could this also cause the three amigos?

Sara

no, it can't

what guage or amp wire is recomended for the wiring mod. Thanks.

the same like it's already in the harness there... 1.0