Engine Controls - System/Component Tests: Introduction

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NOTE: For testing and diagnosis of Variable Valve Timing (VTEC) system, see CODE 21 and CODE 22 charts in TESTS W/CODES article in this section.

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