Off-vehicle inspection

WARNING: This page is about a different car, the 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Remove the oil pressure switch.
Apply air pressure at 400-440 kPa (4.1-4.4 kgf/cm ² , 58-63 psi)
Inspect continuity the between oil pressure switch terminal and screw part.
- If there is no continuity, replace the oil pressure switch. (See OIL PRESSURE SWITCH REMOVAL/INSTALLATION .)
Install the oil pressure switch.

Fig 1: Inspecting Continuity Between Oil Pressure Switch Terminal And Screw Part

Courtesy of MAZDA MOTORS CORP.