626 2.5L
WARNING: This page is about a different car, the 2001 Mazda Protege, 2001 Mazda Millenia, 2001 Mazda MX-5 Miata, 2001 Mazda MPV, and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect CMP sensor harness connector. CMP sensor is located next to right timing pulley. Using ohmmeter, measure resistance between component terminals. Resistance should be approximately 550 ohms. Replace as needed.