Knock Sensor: MPV
WARNING: This page is about a different car, the 2000 Mazda Protege, 2000 Mazda Millenia, 2000 Mazda MX-5 Miata, 2000 Mazda MPV, and 2000 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect knock sensor connector. Using ohmmeter, measure resistance between knock sensor terminals "A" (Red wire) and "B" (Black wire). Resistance should be about 560,000 ohms at 68°F (20°C). If resistance is not as specified, replace knock sensor.