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Bypass Fuel Pump Relay?


weldingrod

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13 minutes ago, datzenmike said:

I have what you have posted. '84 FSM in the section with the electric fuel pump.

Oh, ok. That table suggests there is NO fuel pump when there is NO oil pressure. That would be as expected I think. 

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Very bottom line on, running, alternator charging, oil pressure failure.... pump on.

 

The whole exercise it to shut the engine off in the event of an accident by sensing the engine has stopped. No alternator charging. I think it should include no oil pressure as well but?

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2 hours ago, datzenmike said:

Very bottom line on, running, alternator charging, oil pressure failure.... pump on.

 

The whole exercise it to shut the engine off in the event of an accident by sensing the engine has stopped. No alternator charging. I think it should include no oil pressure as well but?

Ah, there is a distinction between oil pressure = NO pressure, and oil pressure = FAILURE.

They probably account for the "failure" of the oil pressure sensor (open circuit) and keep the engine running; in the last line.  They probably suggest that the engine will stop running in the event of an accident (3rd line).  

 

Who knows.  I've questioned much of Nissan's logic in the past. 🙂

Edited by spddm0n
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2 hours ago, datzenmike said:

Yeah like the dimmer switch that can't be turned up any brighter.

Or passenger doors, without door lock cylinders. WTF?!

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