[V6-12v] OT: Brake Pad Sensors

[The CyberPoet]

It's normally done as a loop of a wire through the pad material; the  
system senses continuity through the wire (with the warning based on  
the signal no longer having continuity).
Since you are saying the sensor connector wasn't there, it would seem  
some previous owner already looped the sensor before the brake pads  
when they replaced their pads with after-market (non-sensor) type pads.
That would imply that there is a failure in the continuity of where  
they looped it back on itself.

The other possibility (always good to pull error codes) is that there  
is a totally separate issue causing the warning light, such as  
insufficient pressure at the master cylinder reservior...

Cheers,
=-= Marc

On Oct 24, 2006, at 12:37 PM, James Whitehouse wrote:

> Hi guys,
>
> Sorry this is off topic in that it relates to my Mum's Golf MK IV  
> GTI 20V,
> but I know that you guys are a mine of wisdom on Audis, and in this
> instance, the golf of this era is very similar to the A3.
>
> I'm having a very puzzling time while replacing the brake pads. The  
> 'check
> brake pad' warning came on in the dash, and sure enough they were  
> worn down.
> Ordered the brake pads with sensor, as we had the pad-specific  
> warning. On
> stripping down the brakes today, none of the original pads had  
> wires on
> them, but otherwise identical. Neither was there a connector to  
> which wires
> would plug in visible. We therefore cut the wires off the new pad  
> (only one
> of them has sensor wires) and installed.
>
> Only thing is, the warning light is still on.
>
> So the question is: how the hell does the car 'know' that the pads  
> are worn
> down when there are no sensors in the pad?? It's not taken off the  
> brake
> fluid level, we tried disconnecting that, and got a 'stop: brake  
> fluid level
> low' warning, not the same as the original warning that still  
> exists 'check
> brake pads'...
>
> Anyone got any ideas??
>
> Cheers,
> James
>
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