Control System Diagram [LF, L3]: Notes
WARNING: This page is about a different car, the 2009 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Be aware that Oxygen sensor terminology differs between California models (3 O2 sensors) and Non-California models (2 O2 sensors). When testing/servicing oxygen sensors, refer to SYSTEM WIRING DIAGRAMS article to properly identify appropriate sensor.