Engine Controls - System/Component Tests - 1.6L: Introduction

NOTE: California and Federal applies to installed emission equipment, which may be verified by underhood emission decal. California emissions may be available in other states. References to California models applies to California emission vehicles.

Before testing separate components or systems, perform procedures in BASIC TESTING - 1.6L article. Since many computer-controlled and monitored components set a diagnostic trouble code if they malfunction, also perform procedures in TESTS W/CODES - 1.6L article.

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

NOTE: When testing some systems, tachometer may be required. Tachometer must be connected to proper terminals. For tachometer connections, see IDLE SPEED & MIXTURE in the ADJUSTMENTS - 1.6L article.