On-vehicle Inspection (harness 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.

Disconnect the negative battery cable.
Remove the under cover.
Disconnect the cord assembly connector.

Fig 1: Disconnecting Oil Pressure Switch
Courtesy of MAZDA MOTORS CORP.
Verify that there is no continuity between cord assembly terminal and ground. See Fig 2.
- If there is no continuity, inspect the cord assembly.
- If the cord assembly is okay, inspect the oil pressure switch. (See ON-VEHICLE INSPECTION (OIL PRESSURE SWITCH INSPECTION) .)
Connect the cord assembly connector.
Install the under cover.
Connect the negative battery cable.

Fig 2: Checking Continuity Between Cord Assembly Terminal And Ground

Courtesy of MAZDA MOTORS CORP.