Hi Steven,

I see that you might be getting a little frustrated with your cars wiring or the sensor.
This is a two way street of communications of which has plagued the world for centuries. Knowing what you said or what you thought you were saying and the flip side is on how it was heard in the other persons mind!
We are lucky at the moment we are not translating on top of that!

I would not get onto Art Bernstein case about ring to the point and wanting clarity of how you are using the leads of your meter and where you are putting them.
There are circumstances that the meter can show you that will be the same numerically but mean what?
That is the “cute” in all of this!
Depending on what mode the meter is in or how you apply the connectors onto or in-line with a circuit will rolls up the sleeves and tighten the thinking caps!


You used a technical word called “impedance” which in itself pertains to an Alternating powered Circuit of electricity. We are using DC not AC.
You can also use terms like reactance, susceptance, reluctance, inductance and they will get you in big trouble with someone who understands it.


I can try to tell you electricity is simpler than electronics because you don’t have to think so deeply about it. What you need to do is just float on top.
If the world population had to learn about electronic theories first, in order to have babies, there would be a whole lot less people on this planet!
First of all, A man and woman having sex has its own electricity but electronics is a study of something like DNA. It’s a whole lot smaller world in there!


This testing and thinking about it’s impedance getting on the brain really doesn’t fit into the mechanics of this application.
This word alone raised up his antennas to what you are doing to get that high a voltage input to the meter if you looked at the chart.
In fact, the voltage plus the buzz work didn’t fit! So, it did the same to me that made me post the earlier comment in this thread.
I was suspicious that you were on the sensor end, out under the hood, doing a measurement without the sensor connected. Reading the output from the ECU to the sensor. A lot of things working only on 5 volts.

In this case you were reading 4 volts because you made a good enough ground on one half of the wiring to get that voltage. It was coming out there on one of two wires. He is asking where the probes were! Both leads In the connector that fits the ECT sensor or only one? It is a tight fit in that fitting.
Outside or inside the car and where about was the sensor, as I was also thinking!
On the other hand, if you were reading at the ECU inside and got a good ground.
You still may not even be reading the sensor, if a ground wire has broken. This being on the grounding side going out to there!
It would be the same as having no sensor hanging in out there!
I went thinking the body of the sensor got insulated.
Do you get it now? Possible open circuit on the ground wire! The location of the leads matter!

You see, you got to be “a little smarter than the meter!”
A soul can be grounded in more ways than one! Same for a meter!
Most of the time, during a week a meter knows what its doing!
But it can be just as dumb, as two ways from Sunday, on which day of a weekend starts or ends a week!
Some even say it’s Monday, since you are to be forgiven on Sunday, unless you’re retired, then it doesn’t matter so much! (-:)
It takes a “human” to figure out whichever is important, as this apparatus is human built with various limitations of capabilities.
We make machines to be better than ourselves and prove it everyday, that “perfect” cannot exist, but perfecting is always a work in progress!

If you had read the 2 plus volts at the ECU, per the chart, with the sensor in place with a complete circuit, we wouldn’t be having this conversation.
The ECU tells all! It has to COMMUNICATE on a two wire street in this case.
This sensor has two wires, where an oil switch and most temperature sensors only have one and uses a chassis ground!
This one has to be made to work with a more sophisticated and sensitive circuit than heating up a bi-metal strip for a temperature gauge in the instrument cluster. It’s only a reference to about H to C or about E to F with lots of blank space in between!

I hope this cooled the waters of anxiety and you don’t tick off Art!
He had kids, that I bet he took good care of them to learn things and besides he takes a lot of his time to help us!
There is some real good technical stuff in his soul!
A live, thinking, Bentley manual he is!

I didn’t have kids, as I’m still trying to figure out electronics.
I have a good grasp on electricity but maybe I’m just a backwards child!
(-:)(:-)

Phil