Dear SBP,

Lets try this again, please...

Last Thursday you said "Continuity/voltage to sensor plug-in checks good"

My question to you was this:

This statement means to me "I pulled the connector from the sensor and measured the voltage between battery negative and the connector's female pin where the blue/red wire connects, and found 4.2V, same as measured at the ECU with the sensor connected and installed."

Is that correct?

I'm trying to learn, in detail, how you know the wiring to the sensor "checks good" because obviously, to me anyhow, it isn't or the sensor is NG. The questions about "ground impedance" are red herring.

You said:

"Red lead of voltmeter backprobing @ #13 of "white label 561" ecu seated plug/harness whilst vehicle ignition is in run position and at operating temperature (192 degree thermostat) .

Black lead of voltmeter contacting good ground on firewall. "

We know this already. It was well described by you before. You said you read 4.2V at pin 13. I told you the circuit to the sensor is open.
--
Art Benstein near Baltimore

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