Quote:
Originally Posted by JustJeff
Forgive my ignorance, but I'm confused on how you're talking about testing resistance. IIRC the harness at the sensor is 2-pin. So to test resistance between those two pins wouldn't I need to find out which pin on the sensor harness corresponds to the ECU pin and then test resistance between that pin and the other pin on the sensor it'self?
I'm confused on what 2 pins on the ECU I'd be testing for resistance. 2E is the only water thermosensor pin on the harness/ECU. I originally was thinking I could put one DMM probe on that pin and one ground to chasis...but that's not the same as checking resistance at the sensor itself...or is it and I've simply overthought things and gotten myself confused.
For what it's worth, I was thinking the same thing about added resistance for the small load the harness will add.
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My bad, I should have given you the reference to the schematic diagram on FSM page F2-8. If you follow the water thermo sensor wires back to the ECU connector on the diagram, you'll see you can measure your resistance between pins #2E and 3D. Pin 2E goes to the water thermo sensor and connects to nothing else; 3D is labeled "E2" on the ECU side, which I believe is a common +5VDC supply to a bunch of the sensors, including the water thermo.