On-vehicle Inspection (harness inspection)

WARNING: This page is about a different car, the 2005 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: Identifying Oil Pressure Switch
Courtesy of MAZDA MOTORS CORP.
Verify that there is no continuity between cord assembly terminal and ground.
- 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) .)
Fig 2: Measuring Resistance Between Cord Assembly Connector And Ground
Courtesy of MAZDA MOTORS CORP.
Connect the cord assembly connector.
Install the under cover.
Connect the negative battery cable.