when does your abs light turn off

[windowlicker]

i put my disco in for an mot yesterday and one of the things it failed on was abs light showing a fault but the light goes off when i pull forward a few feet which i thought was normal.
so i told him that it goes off when you set off but he told me the light should go off after three seconds and that there is a fault is this true?

[SteveGoodz]

i put my disco in for an mot yesterday and one of the things it failed on was abs light showing a fault but the light goes off when i pull forward a few feet which i thought was normal.
so i told him that it goes off when you set off but he told me the light should go off after three seconds and that there is a fault is this true?

When you switch the ignition on the light should come on and then go out for 1/2 to 1 second before coming on again. If it doesn't go out for that short period then there is an ABS fault. It should then go out once the vehicle is travelling at more than (about) 5mph. Again, if it doesn't go out there is a fault.

If you have the owners handbook then the description is on Page 39. I'll happily email a pdf copy of the handbook to you if you pm me with your email address.

HTH

[TDi90]

mine never turns off... i have to keep my 6 pack in shape  :twisted: :P ;)

[windowlicker]

i just looked in my manual and its on a different page (30) and it says:

the light illuminates when the starter switch is turned on as a bulb check
and extinguishes once the vechile has reached 5 mph.
if the light illuninates whilst driving, there is a fault with the system

so reads the same as yours so i think i might have to take the book with me and prove him wrong so i expext after proving him wrong he will fail it on somthing else  :doh:
cheers for the offer of the pdf though i nearly took you up on it as i couldnt find mine

[Jas278]

MOT man wrong , the ABS on your model sounds like it s on motion sensors and wont go out until you move above 5..mph...

[windowlicker]

i wish i still lived round your way as last time i took a car for an mot it was at hillside in shilton i just rang him up took it straight in 15 minutes later i was on my way! round here it takes a week to book it in anywhere mind you you know what they say about norfolk folk lol

[andrew2986]

Hi,
My ABS light (when you turn the ignition on) goes on, blinks off once then stays on until you move the car. If you do not move it will not go off.

HTH

Andy

[SteveGoodz]

i just looked in my manual and its on a different page (30) and it says:

the light illuminates when the starter switch is turned on as a bulb check
and extinguishes once the vechile has reached 5 mph.
if the light illuninates whilst driving, there is a fault with the system

so reads the same as yours so i think i might have to take the book with me and prove him wrong so i expext after proving him wrong he will fail it on somthing else  :doh:
cheers for the offer of the pdf though i nearly took you up on it as i couldnt find mine

You might also want to refer him to the testers manual ~ http://www.motuk.co.uk/manual_340.htm

[windowlicker]

cheers for the link next step is to teach him to suck eggs

thanks
kev

[BigA]

I has this same problem a coupe of years ago. as yours my ABS light goes out after reaching 5 MPH, fortunately i had my manual with me during the MOT and after pointing it out to the tester he passed the MOT, the following year i had no problem at the same station.

As far as i remember from the MOT site, as per the links here, the ABS test is subject to the manufacturer?

good luck putting them right, enjoy the moment.

[Range Rover Blues]

If that's all it failed on I'd be demanding a free retest as a minimum.

The ABS system is basically the same as the RRC I'm assuming.  The ABS light iluminates once the engine is started and stays iluminated whilst the vehicle is in self-test mode.  During this time you can execute the blink test BTW.

Once the ECU sees all 4 wheels sending signals of 5mph or above the light will extinguishas the ECU drops out of diagnostic mode, you cannot interogate it when the car is moving even with Rovacom. 

If it does not extinguish straight away then it's possible the ABS pressure switch hasn't yet tripped out, I had this once after I'd been pumping the brakes with the ignition off, which empties the pressure cell.  After about 10 seconds it went out.

Given that the MOT tester has to road test your truck anyway he should have seen the ABS light function correctly.

If you have the oramge sensors on the ends of yellow wires behind the headlights then you have exactly the same ABS system that I do, if it's alater D1 then the sensors are built inot the ECU but it still works the same way.

[mike142sl]

All the lights on the TD5 turn out before setting off.

[Hightower]

All the lights on the TD5 turn out before setting off.

Unless there has been a problem which caused the ABS/TC/HDC lamps to come on, but that has been subsequently cleared by turning the ignition off and then back on.  In this instance the ABS lamp remains lit until you reach 10mph (the same speed at which the doors lock themselves).

[stageonesimmo]

RRBlues,

Given that the MOT tester has to road test your truck anyway he should have seen the ABS light function correctly.

Whys that then?  If is because of the RBT then I have to disagree - its perfectly safe to use a RBT to test LR brakes.

[windowlicker]

cheers for the replys i should of stated its a m plate 300tdi es so im guessing a different setup to a td5.

i get a ten day window for a free retest so ive welded up a couple of little holes that appeared one of them looks like it had a bit of help :x ive replaced all 4 ball joints on the steering but its failed on excessive free play detected at the steering wheel would this come under the 2 track rod ends as i cant feel any play in the steering box what so ever?

and im just waiting for some offset rims to sort the fouling of the radius arms

[Range Rover Blues]

RRBlues,

Given that the MOT tester has to road test your truck anyway he should have seen the ABS light function correctly.

Whys that then?  If is because of the RBT then I have to disagree - its perfectly safe to use a RBT to test LR brakes.

The ministry have circulated an instructin that 4wd vehicles can no longer be tested on 2 wheel rolling roads.  It also states quite clearly in the instruction for the RRC 9and on the fuseboc lid) that you cannot drive it on a 2 wheel rolling road due to the vicous coupling.

As many cars now have fancy viscous 4wd systems the rulling has been applied to all of them.

[BigA]

cheers for the replys i should of stated its a m plate 300tdi es so im guessing a different setup to a td5.

Mine is an M reg TDI, so definitely should go out when you reach 5 MPH, if you need i can find the manual and scan the page stating this.

i have play on my steering wheel too at the moment, unfortunately you can see that going into the steering box, so i need to replace mine before the MOT  :'(

[Range Rover Blues]

A small amount of play is acceptable in a steering box.

[stageonesimmo]

RRB,

Thanks for that ref the testing - we do tend to lag behind the rest of the minisrty here in defence towers - no doubt they'll put some thing out on it at some point - but I'll be a civvy by then so wont know or care!   :lol:

[Range Rover Blues]

Ah, now I see.  I understand it was foillowing a near-miss invoving a sports car with 4wd leaving the rollers :-.

[CNorman]

You cant perform the test on a rolling road can you because you have to check the operation of the handbrake and as it is operated via the tranmission the landy would take off! Litirally, and it has been know to happen in the past.

[stageonesimmo]

Only if the diff-lock is engaged......................

[Range Rover Blues]

No the handbrake has to be checked one wheel at a time like the service brake.  The MOT requires only that the tester satisfy himself that the brakes function correctly, my local garage used to park it on a slope.

[stageonesimmo]

We've been through a spate of them failing on imbalance of all things - must be the larger amount of twist in the long half-shaft showing up in the results - We just sign them off as a pass if the overall figure is above the 25% needed...........

You'd think the RBT would be clever enough to know that the LR has a transmission brake and so in theory there should be no imbalance   :roll:

[Range Rover Blues]

It could also be the inbalance of weight across the back axle, mine always locks up on the test because it can't grip the rollers.