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Discussion Starter · #1 ·
Ok, It was funny but this is becoming unfunny. The ABS light on my '97 Dicovery refuses to go off. I've checked the resistance in the Speed Sensors (1,040 Ohms in the two fronts, one rear and 1,020 ohms on the last rear.) Now I know that 20 ohms isn't going to make a big difference, I've spoke to a few LR dealers in Melbourne and they all say bring it in and we'll charge you for telling you the ABS is F*&^%$. I've seen on another site Spanish trailrovers, a way to extract fault codes without paying for a magic black (Wallet emptying) box. However this is for North American RRs and they had a different wiring loom for the ABS. My question, is does anyone know a way the get these codes out, my thinking is bridging a relay out and having the codes flashed at you in sequence by the ABS warning light. I've taken out the sensors and cleaned them put them back in all the way, worshipped god, prayed to mecca, promised the pink pixies at the bottom of my yard that I'm a reformed character, but to know avail. I'd be indebted to any one who knows anything about this.

Wes Down Under ( ABS light Still ON)
 

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unfortunatly, no matter how much worshipped god, pray to mecca, promise the pink pixies at the bottom of your yard you're still going to have to open up your wallet. only way around it is if you can find yourself an independant mechanic with the test book software.
sorry
sam
 

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Wes,

I sympathise mate, I really do....

Right then, - this has been covered at lenght on the LRO forum.

Basically you need to make sure of a couple of things first - are your wheel bearings and swivels adjusted correctly - even a slight amount of play will cause the CV joint to wander in an eccentric path rather than circular and this knocks the sensors out and increases the air-gap bringing on the light.....

If all is ok there then having tested the sensors and gotten good (same as mine anyway...) readings then it obviously could any number of things, but sensor air-gap is the most common fault by far - do you get any other strange behaviour with it or not?

I'm waiting for new seals and sensor bushes to arrive then I'm having another go at mine, having seen a guy on the LRO forum sort his out - and he was having REAL problems with his.........

Check the bearings and swivels first mate before spending big dollars on Test-book armed highway-men........

Hope this is of some use....

Bri
:beer:
 

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Discussion Starter · #4 ·
Infernal ABS

Thanks for the info,

I bought the car a couple of months ago and to sell a car or a bike in Oz ( Victoria) you need a Road Worthy Certificate ( like the British MOT) anyway the seller had paid out over A$500 to get the ABS Light to go off ( two front Speed Sensors.) He also had to have the front swivel hubs replaced also. When I took the front sensors out, I did notice that the ABS teeth where covered in grease( Molibdenum Disulphide) All was well and good until a month ago and the light came on and it hasn't been off since and its sitting on the drive, sniggering at me.

I'm doing some proper off-roading at a place called Dargo in the new year( real bush, miles from anywhere) with a couple of mates (Landcruiser and a Patrol) and I've got to get it sorted out by then.

Peace
Wes
 

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Wes DownUnder said:
Getting a decent pint of Guinness down here is a nightmare, I have to travel miles. :beer: :drink1:
I should come visit - you could get it intraveinously from me as I LIVE on the stuff - a 14.5 stone vegetarian - unheard of, unless of course he drinks guinness like its going out of fashion......

:beer:

:beer:

:beer:

:beer:
 

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Discussion Starter · #7 ·
Waif

I'm a 10.5 stone super waif and I have to travel 40 klms to get a decent pint o' Guinness. But by god its worth it. The colonies have no idea how to keep the black magic. Ice cold , ice cold is the only way to drink it here.

The Discovery is still laughing at me, and I am slowly running out of ideas, there are a few friendly breakers(Wreckers) locally but I get the feeling its going to hurt. I'll keep you updated. I did have a '92 Sierra Ghia with ABS and I never had a problem in the 4 years I had it, such is life.

Peace.
Wes
 

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Discussion Starter · #8 ·
Dargo

simmo,
would love to see you down here, the OZZIES know how to off road and every other the car goes off road.

If you get the chance, call me , I know the best Irish bar in Melbourne. :beer:
 

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As with you folks, my ABS light ('96 Discovery-I SD) is also a pain. On first start-up, it comes on with the ignition switch. That is just a self-lamp-test. As I pull away, the lamp goes off. The ABS works when in this state. In fact, it is overly sensitive responding even to rough pavement. A bump or two later, the lamp switches on and the ABS quits working. It stays in that state until the ignition circuit is cycled. At that time, the whole process starts over.

Here in the States it is not an issue, other than being an annoiance. I'm not one to stand on the brakes in panic when there is a problem so ABS is a convenience, when it works, not a real safety issue. Still, the next time I have the beast in for major service, I'll have the sensor spacings checked.

rick / tulsa, ok
 

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...and regarding Melbourne; What a fantastic city! I am a track marshal for the Australian F1 Grand Prix (except for next year when I have a conflict). Fell in love with the place in 1997 when at my first Formula 1 race! A year ago I tried to arrange my retirement to Melbourne but couldn't pass the immigration requirements (too old).

Yes, I LOVE black beer but diabetes has put it off the menu... :-(

Now, back to LRs.

regards,

rick the-turn-15-trackie lindsay
 

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Wes, call the guys at landvehiclespares (type that into google to find their site). These guys are awsome and friendly, they may be able to give you some tips.
 

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Wes DownUnder said:
Thanks for the info,

I bought the car a couple of months ago and to sell a car or a bike in Oz ( Victoria) you need a Road Worthy Certificate ( like the British MOT) anyway the seller had paid out over A$500 to get the ABS Light to go off ( two front Speed Sensors.) He also had to have the front swivel hubs replaced also. When I took the front sensors out, I did notice that the ABS teeth where covered in grease( Molibdenum Disulphide) All was well and good until a month ago and the light came on and it hasn't been off since and its sitting on the drive, sniggering at me.

I'm doing some proper off-roading at a place called Dargo in the new year( real bush, miles from anywhere) with a couple of mates (Landcruiser and a Patrol) and I've got to get it sorted out by then.

Peace
Wes
Just a thought,from memory there is a torrington race in the hub that the top swivel pin rotates on,if the pre-load is set up as you would for non-ABS it will be far too tight and cause the race to break up and interfere with the pick-up from the reluctor. It may be worth pulling the sensor and checking down the hole with a magnet for debris.
****
 

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Discussion Starter · #13 ·
Hi Mike,

I took the front sensors out over the week-end and had a peek at the teeth. The only thing I saw was traces of Molibdenum Disulphide, I cleaned off as much as I could get but its not happening. I managed to talk to a specialist on Air bags and ABS today and he said that the WABCO systems on the Discoveries log the faults and can only be turned off by the Test Book. I've got another source to call tomorrow and then after that its Test-Book time.

Wes
 

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Wes DownUnder said:
Hi Mike,

I took the front sensors out over the week-end and had a peek at the teeth. The only thing I saw was traces of Molibdenum Disulphide, I cleaned off as much as I could get but its not happening. I managed to talk to a specialist on Air bags and ABS today and he said that the WABCO systems on the Discoveries log the faults and can only be turned off by the Test Book. I've got another source to call tomorrow and then after that its Test-Book time.

Wes

Yeah, Wes, they LOG the faults BUT - if the fault goesa away, the ABS comes back on! This is why it does a self test every time you turn on the power - if nothing is wrong it works normally, if there is a fault, the light comes on and the ABS is switched off. The fault code is then stored to aid fixing it. This can carry on indefinatly untill the memory limit is reached then the oldest code is bumped off each time a new one is detected. BUT should there be NO fault on start-up then the ABS will work fine regardless of how many fault codes are stored in the memory - they are purely for diagnostic purposes and DO NOT stop the ABS from working........

Just 'cos it has codes in its memory doesnt mean it stays knackered cos of it!

Clearing them helps diagnose whats going on as you can then re-check when the light comes back on to see what fault(s) have occured since it was cleared.

I'll bet money on you getting fault codes from the ECU using testbook that relate to air gap faults....

Bri
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Discussion Starter · #15 ·
Bri,

I didn't know that, thanks. I'm going to call Landvehicle spares tomorrow, they are in N.S.W.s and see what the've got to say. Like I said the swivel hubs have had work done to them I'm not sure what. I have got a friendly independent LR specialist who has got a scan tool, he wants A$80 to tell me its probably the Air Gaps. BUt before I go there I'll check the wheels and hubs again.

Just a quick note, does anyone know if there is any software on the net that can get these codes? I know I'm grasping at straws.

Peace,
Wes
 

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Just a quick question: Are the D-Is outside the US different with regard to the diagnostics? I am told that the interface is just OBD-II, not something exotic. What am I missing?

rick
 

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Rick - no idea - not too good on the actual workings of these things, I just know what they do, not exactly how they do it... :mad: ....

Wes, I'm trying to find that very info myself - apparently there's a way of doing it, by shorting pins or similar, that gets the ECU to flash the codes out using the warning lamp......... Had no luck finding it yet though....

Bri
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Rick Lindsay said:
Just a quick question: Are the D-Is outside the US different with regard to the diagnostics? I am told that the interface is just OBD-II, not something exotic. What am I missing?

rick
ODBII in canada too ;)
sam
 

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Hey guys, up a level in "Discovery Test Questions", Disco-Mike just posted a really nice note regarding the EMS error codes. Have a look.

rick
 

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Discussion Starter · #20 ·
More confusion

Ok,

I need to clear something up, all the official Discoveries sold in America (NAS) were built with a different wiring loom than all the other cars built in the factory. Differences included an Engine check light under the seat, emission requirements and a pile of other things as-well. As wiring and engines were concerned Its a different car, sadly this may also include any info regarding ABS. Cos I can't remember if the braking system was different, I get the feeling it wasn't but I can't remember. As I recall it was like this for the wiring systems.

Nas
Jap
ROW (Rest of World)

This will probably include anything to do with the ABS codes.

Rapidly losing the will to live,
Wes
 
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