Section 10 (Engine Controls - Basic Testing - 2.3L): Summary
WARNING: This page is about a different car, the 1997 Mazda Millenia. However, it is still accessible from the selected car via links, so may be relevant.
If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed to appropriate TESTS W/CODES - 2.3L article. If no hard codes are found in self-diagnostics, proceed to TESTS W/O CODES - 2.3L article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.