I had mistakes-typos on pin-numbers info above, but is now corrected.
Place the meter black test lead at either of (any one of) these locations:
Module pin-3 (is a green/white wire)
MAP Sensor pin-4 (is a green/white wire)
Cylinder Head Temp (CHT) Sensor pin-2 (is a green/white wire)
Sorry about my ground-reference brain-fart mistake. The "free" help info found on the web, posted by Marde, should always be suspect bad info or complete BS.
Always check your fluid levels, -then check your car.