I am trying to wire in this addition harness for my Blitz SBC ID III. It will measure the the amount of voltage going to any sensor.
I want to monitor my:
- Water Thermo Sensor
- Air Intake Temp Sensor
- AFM Air Intake Temps.

I have read through the factory service manual and found the trouble shooting guidelines for measuring RESISTANCE on all sensors.

I also found the Voltage Output chart (pg 4B-32/ 86-88 FSM) for all three sensors.

-Water Thermo is supposed to have approx 0.4-1.8V when the engine is warmed up.

-AFM Intake temp should have 2-3V @68 degrees F

-Air Intake Temp sensor should have 1-2V @ 176 degree F

My question is what correlation does resistance have to voltage? More resistance less voltage correct? Now since these voltage guidelines only give the happy median for the sensors, is there a way I can figure out what the senosrs max voltage/temp will be and vice vers for low temp/voltage?

Since the troubleshooting procedures all have you measure resistance, should I be able to work off of those numbers to determine the voltage that correlates with the resistance for the specific tempature?

OR do I need to call Mazda to get the parameters of all the sensors?

Any help is always appreciated guys. Thanks

 

So basically does anybody know the voltage parameters of these three sensors? Or maybe where I could find the info?

 

V=ir

 

Yes, Voltage does equal current x resistance. And current(amperage)= voltage/resistance BUT even if I measure the amperage on the plug to sensor I dont think I wil have enough info to complete the formula to figure out each sensors full range.