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Car Forum / Citroen Cars / May 2006

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Xantia ABS query

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drd - 19 May 2006 22:14 GMT
Evening All ...

What is the usual reason for the ABS light coming on in a 99 2.0hdi Xant
estate?  I can confirm that the ABS actually has packed up following road
testing in the wet earlier this evening.

What's the usual culprit befoer I start skinning knuckles un-necessarily or
inappropriately?!

thanks in advance

Steve
Slim - 19 May 2006 22:24 GMT
Normal problem is a duff wheel sensor. These can be checked either by
splitting the sensor wire and measuring wit an ohm meter, or much
easier to dissconect the ABS ECU plug and check it in the terminals.

Should read 1080 ohms at each sensor.

I cannot remember the terminal numbers to check, but I will look it up
over the weekend and post it.

Regards
    Slim
drd - 19 May 2006 22:31 GMT
> Normal problem is a duff wheel sensor. These can be checked either by
> splitting the sensor wire and measuring wit an ohm meter, or much
[quoted text clipped - 7 lines]
> Regards
>     Slim

many thanks

... though now I'm also wondering if the occaisional grinding noises from
the front brakes over the last few months have had anything to do with it
... I'd put it down to worn discs but ...?

S
Brian - 21 May 2006 09:22 GMT
> > Normal problem is a duff wheel sensor. These can be checked either by
> > splitting the sensor wire and measuring wit an ohm meter, or much
[quoted text clipped - 13 lines]
> the front brakes over the last few months have had anything to do with it
> ... I'd put it down to worn discs but ...?

Are the discs worn?
ABS problems CAN also be just the wrong gap between the sensor and hub.
When the warning light comes on for any reason, the ABS system is switched
off.
Slim - 21 May 2006 12:37 GMT
Hi.

To check from the ECU harness.

Switch off ignition
Remove ABS ECU wiring plug from the ECU
Using an ohm meter check the terminals on the connector, not the ECU

Terminals 1 and 6 = Right Front
Terminals 15 and 30 = Left Front
Terminals 29 and 31 = Right Rear
Terminals 19 and 28 = Left Rear

Just in case !! The left and right is refered to as from the driving
position, ie from the rear of the car, not as you will be standing and
checking.

Also, the thickness of the discs and pads will make no diference at all
to the ABS as the sensor is fixed into the hub and the pick up ring is
on the drive-shaft. The gap (air gap) is set on the Xantia and cannot
be moved, so I doubt if that will be your trouble.

When fitting a new sensor, the ABS light may not go out as soon as
started. Citroen will tell you that it needs to be fitted by them and
then reset on the computor! This aint true, all you have to do is put
the wheel on and drive, the thing will reset as soon as you reach
approx 15 mph

Hope this helps in some way, let us know how you get on.

Regards
     Slim.
drd - 21 May 2006 22:42 GMT
> Hi.
>
[quoted text clipped - 28 lines]
> Regards
>      Slim.

thanks Slim - I'll check it out asap.

this, http://xania.org/article.php/citroen  made me smile ...
 
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