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Subject:speed sensor failure
From:Richard A Jones
Date:Sat, 19 Apr 2014 15:57:34 -0600

Anyone know anything about speed sensor failures?  I
have a VW 3-wire sensor in the back of my speedo
that (via a Dakota Digital box) gives (or gave) my
2.5 Subaru ECU the exact speed, and my cruise control,
too. (2000 or 2001 AT ECU)

It suddenly failed.  That is, it was working one day
and not the next.  I noticed 0MPH on my ScanGauge.
I checked all the wiring, connections, etc, back to
the sensor and found everything was OK.  I looked
for a signal from the sensor with my multimeter,
using both AC and DC settings, but nothing.  I think
the sensor just failed.   I removed it and tapped
it on the countertop, and reinstalled, but nothing.

Anyone know about this?  Does it happen?  Is there a
life of these sensors, etc?

I'm heading to Duvall on Wednesday, apparently with
no speed info to the ecu and no cruise control.  :-(

Richard
Boulder

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