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05 Feb 2005, 10:19 am
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ECU & "engine running" signal question
How does the ECU know the engine's running? Does it use an alternator
output signal, or does it use the RPM pickup in the distributor? Also, what's the purpose of the Starter Signal as used by the EFI main relay? Is it only to energize the fuel pump relay while the engine's cranking? -- TeGGeR® The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/     
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05 Feb 2005, 01:03 pm
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Re: ECU & "engine running" signal question
Crank postion sensor in the distributor
yes "TeGGer®" <tegger@istop.c0m> wrote in message news:Xns95F469625643Cteggeratistop@207.14.113.17.. . > How does the ECU know the engine's running? Does it use an alternator > output signal, or does it use the RPM pickup in the distributor? > > Also, what's the purpose of the Starter Signal as used by the EFI main > relay? Is it only to energize the fuel pump relay while the engine's > cranking? > > > -- > TeGGeR® > > The Unofficial Honda/Acura FAQ > www.tegger.com/hondafaq/
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05 Feb 2005, 03:30 pm
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Re: ECU & "engine running" signal question
"Mista Bone" <mistab0ne@nospam.net> wrote in
news:xT7Nd.6825$XY5.978@fe2.columbus.rr.com: > Crank postion sensor in the distributor So the if the RPMs are above a certain amount, the ECU considers that the engine is running? I ask because obviously the crank angle sensor would be registering movement even during starter operation.
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