Logically if the landrover specialist gets a dodgy waveform on the osf and then swaps the front sensors over and still gets a dodgy waveform on the osf, it can't be anything else than reluctor can it, unless some of the wiring goes to the BECM and that's dodgy ?
And of course, if it turns out...
The lights go out and then the fault appears as soon as I brake - abs is definitely kicking in as it doesn't allow any further pressure to be added on the pedal but I have to keep the pressure on because I do actually want to stop and eventually pedal will give and apply the brakes. I get the...
I'll see what the Landrover Specialist comes up with tomorrow with his diagnostic kit. He can check the waveform on his oscilloscope. If sensor checks out (5v dc at loom already has) then I think its going to be a case of pulling the hub & halfshaft and probably changing the reluctor ring. Can't...
I only replaced the originals because I had to replace the balljoints as they were an mot failure and you can't pull the hubs/driveshafts out of the carriers with the sensors in.
The originals were rusted solid into the hub carriers so had to be destroyed to remove them.. I would have left them...
Never had this problem with my 32 year old mk3 granada with abs - still on its original sensors which bolt in so air gap is pre-set. Only thing I did a couple of years ago is fit a new accumulator. The Ford or Saab or GM ones are no longer available but the range rover p38 Wabco one fits - as...
We are only talking about slight surface scoring, not worn through the stainless casing. I know the Wabco ones were dimple-less and the bore, cage & sensor need to be fully greased, which I did with the original set and the sensors went fully home with firm finger pressure. So do the dimpled...
I know for a fact that the sensor that is coming up as faulty was pushed fully home because the dimple is scored from where the reluctor ring has been rubbing against it. It was only fitted 3 weeks ago. Flummoxed now.
So if the sensor remains in contact with the reluctor and air pressure has not set the correct gap, is that likely to throw the Abs light on ? My original question stands, what is the correct air gap in thousands of an inch ? I could then set it with a feeler gauge.
I can see where Wabco state...
5v dc across loom pins with ignition on.
Think i'll take the sensor out and check the dimple for iron filings & scoring if its been in contact with the reluctor ring. It was inserted with firm finger pressure up to the reluctor ring - it didn't need to be knocked in, so I can't imagine that it...
Update :- My local garage/MOT station that I've used for the last 6 years has diagnosed a faulty front RH ABS sensor and/or faulty wiring. His kit doesn't diagnose it in any further depth. He didn't carry out any other work on the abs sensors in case it gave the "Landrover Specialist" an excuse...
I guess having the ignition on and the pump running means that you don't have to pump the brake pedal - just hold it to the floor. It pretty much bleeds itself - all you have to do is open and close a few nipples and press the pedal down at the appropriate time.
yes - the first you bleed is the master, then the front calipers, then the front booster with pump running, then the rear booster with pump running, then the rear calipers with pump running, then the front calipers again with pump running.
I had the hub carriers shotblasted when i did the balljoints, so the sensor bores were clear, at least before the shotblaster red leaded them lol. I then had to remove the primer from the bores with emery cloth back to bare metal to give sufficient clearance for the new sensors, before greasing...
Managed to bleed the master cylinder today so at least I know I can bleed the system myself if needs be i.e. if the garage bloke declines the work ( he declined to do the head gasket on my other half's MGF a few years back, so I did it myself - ended up being a cracked liner so bottom end had...
Tried the master cylinder bleed nipple again at lunchtime today and managed to get quite a decent amount of fluid out, so at least I know now that it will bleed.