FW: Ignition Switch Failure Mode

Ben Swann benswann at verizon.net
Fri Jun 19 19:42:29 PDT 2009

Actually, they can and do fail in this exact manner.   The cranking terminal can connect
allowing the starter to turn enging over, while the ignition/ECU(spark/fuel) portion  of
the swich does not enable.  This can be intermittant and often be associated with the
switch overheating.  The car often will start fine after cooling down.  Sometimes the
ignition portion is disable when cranking, but can "catch" when released to run position
and engine can start.  Seen it happen this way on several 5kts.


[Date: Fri, 19 Jun 2009 12:41:50 -0500
From: Tony Hoffman <auditony at gmail.com>
Subject: Re: FW: Ignition Switch Failure Mode
To: geraintlloyd_qc at yahoo.ca
Cc: quattro at audifans.com, 200q20v at audifans.com
	<7bd5cbf00906191041g12cbc260yf5091044a6b3a78b at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

If all the VAG switches that I've replaced, I've never seen one fail
in that mode. I'ts always been no crank, accessories not working, or
failure to return from start. Never seen one kill the spark or fuel
during cranking.


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