Warning Light Remains On
WARNING: This page is about a different car, the 1991 Mazda RX-7, 1991 Mazda MX-5 Miata, 1990 Mazda RX-7, and 1990 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
Disable air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM. Ensure diagnostic module connectors are properly connected. If connector is okay, replace diagnostic module.