Engine Controls - System/Component Tests - 3.0L: Introduction

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Prior to testing separate components or systems, it is recommended that all procedures listed in the BASIC TESTING article be performed. Since many computer controlled and monitored components will set a service code if they malfunction, check EEC-IV system and retrieve service codes. See Quick Test procedure in the appropriate TESTS W/CODES article in this section. If service codes are present see appropriate CIRCUIT TEST in the appropriate TESTS W/CODES article in this section.

NOTE: Testing individual components does not isolate shorts or opens. Perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) that has a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate wiring harness shorts or opens.

NOTE: For wiring diagrams not shown in testing procedures, see WIRING DIAGRAMS at the end of this article.