EGR Vacuum Regulator Solenoid
WARNING: This page is about a different car, the 2003 Mazda Tribute, 2003 Mazda B4000, 2003 Mazda B3000, and 2003 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition switch off. Disconnect EGR Vacuum Regulator (EGRVR) solenoid 2-pin harness connector. Measure resistance between EGRVR solenoid terminals. If resistance is not 26-40 ohms, replace EGRVR solenoid. For additional EGR system testing, refer to appropriate SELF-DIAGNOSTICS article.