Home/Jaguar/XJS/Jaguar XJS Series 3 (1990-1996)/Repair manual/Testing & Diagnostics/Engine Controls - System/component Tests: Overview
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Engine Controls - System/component Tests: Overview Jaguar XJS Series 3

INTRODUCTION INFORMATION

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

Note. Testing individual components does not isolate shorted 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 wiring harness shorted or open circuits.