Section 19 (Engine Controls - System & Component Testing): Introduction
WARNING: This page is about a different car, the 2002 Land Rover Range Rover, 2002 Land Rover Freelander, and 2002 Land Rover Discovery. However, it is still accessible from the selected car via links, so may be relevant.
Before testing separate components or systems, perform procedures in BASIC DIAGNOSTIC PROCEDURES article. Since many computer-controlled and monitored components will cause a Diagnostic Trouble Code (DTC) to set if they malfunction, also perform procedures in appropriate SELF-DIAGNOSTICS article.
NOTE:
Testing individual components does not isolate short or open circuits. Perform all resistance and voltage tests using 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.