Engine Controls - System/Component Tests - Gasoline: Introduction: Notes
NOTE:
Testing individual components does not isolate wiring circuit shorts or opens. Perform all voltage tests using 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.
Before testing separate components or systems, perform all procedures listed in BASIC TESTING - GASOLINE article in the ENGINE PERFORMANCE section. 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 in TESTS W/CODES - EEC-IV (GASOLINE) article in the ENGINE PERFORMANCE section. If service codes are present see appropriate CIRCUIT TEST in TESTS W/CODES - EEC-IV (GASOLINE) article in the ENGINE PERFORMANCE section.