Engine Controls - System/Component Tests: Introduction

NOTE: For testing and diagnosis of Civic Variable Valve Timing (VTEC) system, see CODE 21 and CODE 22 charts in appropriate G - TESTS W/ CODES article in the ENGINE PERFORMANCE Section.

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

Before testing separate components or systems, perform procedures in BASIC TESTING article in the ENGINE PERFORMANCE Section. Since many computer-controlled and monitored components set trouble codes if they malfunction, also perform procedures in appropriate G - TESTS W/ CODES article in the ENGINE PERFORMANCE Section.