Checking Coil Pack
WARNING: This page is about a different car, the 1994 Mazda B3000 and 1994 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
Turn key off, and disconnect coil pack. Measure resistance between coil pack terminal No. 4 and all other terminals. If each resistance is greater than 0.8 ohm, replace coil pack. If any resistance is less than 0.5 ohm, replace coil pack and ICM. Remove all test equipment, and reconnect all components. Clear Continuous Memory and check for fault codes.