Circuit Open/Short Inspection: Notes

WARNING: This page is about a different car, the 2008 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the PCM connector.
Disconnect the ECT sensor connector.
Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Fig 1: Identifying ECT Sensor & PCM Wiring Harness Side Connector
Courtesy of MAZDA MOTORS CORP.