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RE: Power down



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Ross;

Great to see someone from Triumph keeping on eye on the list.

Thanks for the full scoop on the reasoning behind the ignition switch vs. kill switch.

Mark Dieck
Y2K Sapphire Blue ST
Mesa, Az


 -----Original Message-----
From:	Ross Clifford [SMTP:ross.clifford@xxxxxxxxxxxxx]
Sent:	Tuesday, January 25, 2000 1:31 AM
To:	'ST@xxxxxxxxxxxxxx'
Subject:	Power down

Dear All,

I have been reading with interest your recent tread on the power down
procedure in relation to using the ignition switch or the kill switch.

The correct procedure is to use the ignition switch, the reason for this is
that there is a relay set in the ECM circuit when you turn off the ignition
the relay powers the ECM for a few seconds and takes readings for the
sensors around the engine such as throttle position, the air bypass setting,
crank position etc. This information or reference point is used by the ECM
when you next start your engine. Hence the reason the manual tells you not
to touch the throttle when starting as the ECM does it all for you because
it has all the sensor readings from when the engine last idled prior to it
being turned off by the ignition.
Using the kill switch cuts all power to the ECM and thus takes no readings,
the kill switch is really for emergencies only. Some of you may notice that
when you use the kill switch the next time you start the engine it needs to
crank over a few times before it will fire, This is because the ECM has no
reference points and is taking them while it's cranking.
Also some people say that the bike runs erratic for no reason, unless there
is a fault this is almost certainly down to using the kill switch and the
simple cure is to turn the engine off (With the ignition switch) for a
seconds then turn it on and hit the starter and let the ECM do the rest for
you.

Hope that clarifies the question, best regards

Ross
 
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