1996 v6 Corsica Question

Hi,

I am unable to locate the oil pressure sending switch on this car.

wrote:
> Hi,
>
> I am unable to locate the oil pressure sending switch on this car.

Look under the front exaust manifold and above the starter area for a
one-wire switch with a large hex-shaped housing.

Toyota MDT in MO

http://tinyurl.com/yy4rjc

One is located as stated above, next to oil filter, but there is an
optional sender [I nc about this] located elsewhere, so I linked the
above for ya to figure it out.


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Comboverfish wrote:

>
> Look under the front exaust manifold and above the starter area for a
> one-wire switch with a large hex-shaped housing.
>
> Toyota MDT in MO


I see a one wire switch where you say, but if i unplug it, the fuel
pump still engages?

wrote:
> Comboverfish wrote:
>
> >
> > Look under the front exaust manifold and above the starter area for a
> > one-wire switch with a large hex-shaped housing.
> >
> > Toyota MDT in MO
>
>
> I see a one wire switch where you say, but if i unplug it, the fuel
> pump still engages?

Why are you concerned about this? The oil pressure sender / fuel pump
switch assembly isn't meant to keep the pump from operating. If you
let the group know what your actual concern is we could address it more
precisely. I thought you just wanted to know where the OP sender was.

Toyota MDT in MO

Comboverfish wrote:
If you
> let the group know what your actual concern is we could address it more
> precisely. I thought you just wanted to know where the OP sender was.
>

Yes, I want to know where the OP sender was. To check if I found it, I
unplugged it, thinking the fuel pump would not engage. I guess that's
not the case.

I was told that the OP sender disabled the fuel pump in case of an
accident so that if you wrecked the car, the fuel pump wouldn't keep
spewing gas all over the road.

wrote:

> Comboverfish wrote:
> If you
>
>>let the group know what your actual concern is we could address it more
>>precisely. I thought you just wanted to know where the OP sender was.
>>
>
>
> Yes, I want to know where the OP sender was. To check if I found it, I
> unplugged it, thinking the fuel pump would not engage. I guess that's
> not the case.
>
> I was told that the OP sender disabled the fuel pump in case of an
> accident so that if you wrecked the car, the fuel pump wouldn't keep
> spewing gas all over the road.
>

I don't think carmakers have used the oil pressure switch for that
purpose for many years. Since the switch to full computer control of the
engine, its much quicker and more fool-proof to shut down the fuel pump
when the ECM stops seeing crank sensor pulses.

wrote:

> Yes, I want to know where the OP sender was. To check if I found it, I
> unplugged it, thinking the fuel pump would not engage. I guess that's
> not the case.

I see.

> I was told that the OP sender disabled the fuel pump in case of an
> accident so that if you wrecked the car, the fuel pump wouldn't keep
> spewing gas all over the road.

GM has held on to this dual purpose OP sender design for decades now.
I guess they are concerned the fuel pump relay will fail, and the cost
to incorporate the sender/switch as a failsafe is virtually nil. It is
not a safety shutoff measure, rather a FP relay failure measure.

Toyota MDT in MO