Section 2 (Engine Controls - Tests W/Codes - 6-CYL): Summary
WARNING: This page is about a different car, the 1992 Mazda MX-3. However, it is still accessible from the selected car via links, so may be relevant.
If no hard fault codes (or only pass codes) are present, proceed to TESTS W/O CODES diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).