[Diy_efi] Sending unit confusion

[Toyota Supra]

i did, i will try again, just to double check, and let you know






From: Robert W Hughes <rwhughe at oplink.net>
>Reply-To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
>To: diy_efi at diy-efi.org
>Subject: Re:[Diy_efi] Sending unit confusion
>Date: Thu, 20 Feb 2003 09:58:08 -0600
>
>TRy connecting the case/mounting flange to ground.
>
> > in my never ending quest to conquer this circuit, i have encountered
> > something very strange. when i removed the fuel level sending unit to 
>try
> > and test my circuit, i found that i am not able to simulate its 
>electrical
> > function.
> > the sending unit has 2 wires, a yellow and a brown w/ black tracer. when 
>the
> > sending unit is not plugged into the body harness, the yellow wire has
> > +12vDC (or whatever battery voltage may be) on the body harness side of 
>the
> > connector, and the brown w/ black tracer has approximately 15k of 
>resistance
> > to ground, or 35mV of positive voltage.
> >
> > when the connectors are plugged in, the yellow wire will have anywhere 
>from
> > 0 to 3.5vDC, dependent on the position of the "float". the variable 
>resistor
> > will have resistance ranging from 0k to 55k.
> >
> > now, my problem is, i can't simulate the variable voltage outside of the
> > vehicle, to test my circuit. if i put 12vDC into the yellow wire, the 
>brown
> > w/ black tracer will also have 12vDC, so what could that wire possibly 
>be
> > doing, or connected to, that would make the circuit and unit work 
>properly?
> >
>
>--
>Robert W. Hughes (Bob)
>BackYard Engineering
>29:40.237N, 95:28.726W or perhaps 30:55.265N, 95:20.590W
>Houston, Texas "The city with too much Oxygen"
>rwhughe at oplink.net
>
>_______________________________________________
>Diy_efi mailing list
>Diy_efi at diy-efi.org
>http://www.diy-efi.org/mailman/listinfo/diy_efi


_________________________________________________________________
MSN 8 with e-mail virus protection service: 2 months FREE*  
http://join.msn.com/?page=features/virus


_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi