Oil Pressure Switch Test

WARNING: This page is about a different car, the 2008 Honda Pilot, 2007 Honda Pilot, and 2006 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.

Remove the BLU/YEL wire (A) from the engine oil pressure switch (B).

Fig 1: Removing BLU/YEL Wire From Engine Oil Pressure Switch
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between the positive terminal (C) and the engine (ground). There should be continuity with the engine stopped. There should be no continuity with the engine running.