[V6-12v] OT: Brake Pad Sensors

[James Whitehouse]

Brian, Marc,

Thanks for those suggestions. I think it's unlikely it's been bypassed as
there are no previous owners, and these are the first set of brake pads (the
one's I removed are original VW pads).

I've been offline a couple of days, but in the interim I've spoken with the
service manager at my local VW centre. He reckons I should try putting a
little more brake fluid in the reservoir - apparently if you test it by
removing the cap, as we did, it will read a 'brake fluid empty' warning,
rather than brake pads low...

I'm going to try it today so I'll let you know if it works.

Helpful to know that the wire (if there is one) would run down along where
the ABS sensor wires run though...

Cheers,
James

> -----Original Message-----
> From: The CyberPoet [mailto:thecyberpoet at cyberpoet.net]
> Sent: 24 October 2006 23:47
> To: James Whitehouse
> Cc: V6-12v at audifans.com
> Subject: Re: [V6-12v] OT: Brake Pad Sensors
> 
> 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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