Section 12 (Engine Controls - Tests W/O Codes - 2.3L): Introduction

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.

Before diagnosing symptoms or intermittent faults, perform basic diagnostic procedures in BASIC TESTING - 2.3L article and self-diagnostic steps in TESTS W/CODES - 2.3L article. Use this article to diagnose driveability problems existing when a hard fault code is not present or vehicle is not equipped with a self-diagnostic system.

NOTE: Some driveability problems may have been corrected by manufacturer with a revised computer calibration chip or computer control unit. Check with manufacturer for latest chip or computer application.

Use intermittent test procedures to locate driveability problems that do not occur when the vehicle is being tested. These test procedures should also be used if a soft (intermittent) trouble code was present but no problem was found during self-diagnostic testing.

NOTE: For specific testing procedures, see SYSTEM/COMPONENT TESTS - 2.3L article. For specifications, see ADJUSTMENTS - 2.3L or SPECIFICATIONS - 2.3L article.