On-vehicle Inspection (oil pressure switch 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 under cover.
Disconnect the cord assembly connector.
Start the engine, with gear position in N or P.
Reaffirm that there is no continuity between cord assembly terminal and ground.
Firmly depress the brake pedal with the left foot.
Shift the selector lever to D range.

Fig 1: Disconnecting Oil Pressure Switch
Courtesy of MAZDA MOTORS CORP.
Verify that there is continuity between oil pressure switch terminal and ground. See Fig 2.
- If not as specified, replace the oil pressure switch. (See OIL PRESSURE SWITCH REMOVAL/INSTALLATION .)
Connect the oil pressure switch connector.
Install the under cover.
Connect the negative battery cable.

Fig 2: Checking Continuity Between Oil Pressure Switch Terminal And Ground

Courtesy of MAZDA MOTORS CORP.