I was wondering if you could potentially have one person watch the "MAP sensor voltage" reading on the nGauge, while another person took a AA battery (grounded to the chassis) and probed the + lead to each PDM pin through the back of the connector.
I'm not sure how big of a risk this represents. 1.5V seems to low to burn anything up. On the other side, a higher voltage pin would essentially be getting grounded (with a 1.5V reduction in potential).
Thoughts?