Engine Controls - System/Component Tests 2.0L & 2.5L: Introduction
Before testing separate components or systems, perform BASIC DIAGNOSTIC PROCEDURES in appropriate article:
- For 2.0L vehicles, see BASIC TESTING - 2.0L .
- For 2.5L vehicles, see BASIC TESTING - 2.5L .
Since many computer-controlled and monitored components set a Diagnostic Trouble Code (DTC) if they malfunction, also perform SELF-DIAGNOSTICS in appropriate article:
- For 2.0L vehicles, see TESTS W/CODES - 2.0L .
- For 2.5L vehicles, see TESTS W/CODES - 2.5L .
NOTE:
Testing individual components does not isolate short or open circuits. 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 shorted or open wiring harness.
NOTE:
For identification of circuits and terminals referenced in test procedures, see appropriate article:
- For 2.0L vehicles, see WIRING DIAGRAMS - 2.0L .
- For 2.5L vehicles, see WIRING DIAGRAMS - 2.5L .