System/Component Tests: Introduction

Prior to testing separate components or systems, it is highly recommended that all procedures listed in BASIC TESTING article be performed. Since many computer controlled and monitored components will change voltage and resistance valves if they malfunction, it is also recommended that connector pin check diagnosis be performed.

NOTE: Testing of individual components does not isolate possible shorts or opens in the control harness of electronically controlled systems. Use an ohmmeter to isolate shorts or opens in harness. All voltage tests should be performed with a Digital Volt Ohmmeter (DVOM) with a minimum 10-megaohm input impedance, unless specifically stated different in testing procedures.