Use and interrogation of the Diagnostic Connector, Mazda MX-5, by John Cookson. This manual explains the function and use of the diagnostic connector situated near the air filter. Suitable for Mazda MX5 1.6 & 1.8 mk1 & Eunos Roadster. It does not apply to later models fitted with the OBD-11 diagnostic system.
The manual comes with an LED and instructions on how to make your own test probe.
NM00181.