Engine Controls - Tests W/O Codes: Introduction: Notes

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. For specific testing procedures, see SYSTEM/COMPONENT TESTS article. For specifications, see ADJUSTMENTS or SPECIFICATIONS article.

Before diagnosing symptoms or intermittent faults, perform steps in BASIC TESTING and appropriate TESTS W/CODES articles below. Use this article to diagnose driveability problems when a hard fault code does not exist.