Engine Controls - System/Component Tests - EEC (2.5L): Introduction

CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION section.

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

Before testing separate components or systems, perform all procedures listed in BASIC TESTING - 4-CYL article in the ENGINE PERFORMANCE section. Since many computer-controlled and monitored components will set a trouble code if they malfunction, also perform procedures listed in TESTS W/CODES - EEC 2.5L article in the ENGINE PERFORMANCE section.