Not exact matches
The current
drops to a very small value at low
voltage as electrons in the metal contact don't have enough energy to occupy one of the cluster orbitals.
But such a device is relatively inefficient, says Bruce Logan at Pennsylvania State University in University Park:
as the organic content in the waste water falls, the
voltage produced by the bacteria
drops and pulls fewer ions out of the saline water, leaving it with a salty tang.
With no other path to ground in the circuit that I know of (no reversing sensors powered off it) I'm puzzled
as to what can cause this
voltage drop.
If you see the
voltage drop below 1v
as described by the diagnostic procedure then the PCM is fine.
The fact that the
voltage continues to
drop over a period of time
as you are running the engine.
As a rule of thumb battery
voltage shouldn't
drop below 9v while cranking.
It would be possible to cut a trace and add an inline diode to the USB
as well but that might cause a
voltage drop and prevent the charger from working.
A rechargeable has more of a steep
voltage drop near the end of discharge
as compared to an alkaline battery.
Performs electrical tests such
as continuity, power - on,
voltage drop and hipot on communications systems.