ECU & "engine running" signal question
#1
Guest
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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/
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/
#2
Guest
Posts: n/a
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/
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/
#3
Guest
Posts: n/a
Re: ECU & "engine running" signal question
"Mista Bone" <mistab0ne@nospam.net> wrote in
news:xT7Nd.6825$XY5.978@fe2.columbus.rr.com:
> Crank postion sensor in the distributor
So the if the RPMs are above a certain amount, the ECU considers that the
engine is running?
I ask because obviously the crank angle sensor would be registering
movement even during starter operation.
news:xT7Nd.6825$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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