Key Interlock Control Unit: Miata
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, 2002 Mazda MX-5 Miata, and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Remove front side trim. Turn ignition on. Inspect terminal voltages. See Fig 1 . If voltage is not as specified, repair wiring harness and/or key lock unit.