Engine Controls - Tests W/Codes - EEC-IV (3.8L): Introduction

Perform all steps in BASIC TESTING - V6 article in the ENGINE PERFORMANCE section. If no fault is found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. If no diagnostic trouble codes or only pass codes are found during self-diagnostics, see TESTS W/O CODES - EEC-IV (3.8L) article in the ENGINE PERFORMANCE section for diagnosis by symptoms.