Engine Controls - System/Component Tests - EEC-IV (2.0L): Introduction

Before testing separate components or systems, perform procedures in BASIC TESTING - 4-CYL article in the ENGINE PERFORMANCE section below. Since many computer-controlled and monitored components set a trouble code if they malfunction, also perform procedures in TESTS W/CODES - EEC-IV (2.0L) article in the ENGINE PERFORMANCE section.

NOTE: Testing individual components does not isolate shorts or opens. Perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with 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 .

NOTE: In the following testing, circuit diagrams and illustrations are courtesy of Ford Motor Co.