Engine Controls - System/Component Tests 1.0 & 1.3L: Introduction

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

Before testing separate components or systems, perform basic diagnostic procedures in the BASIC TESTING article. Since many computer-controlled and monitored components will set a Diagnostic Trouble Code (DTC) if they malfunction, it is also recommended that self-diagnostics be performed. See the TESTS W/CODES article.

DO NOT disconnect PCM electrical connectors, battery cables, PCM ground wire harness or PCM memory power input 15-amp fuse before checking for DTCs. Any stored DTCs will be erased from PCM memory when power is removed from PCM.