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Section 16 (Engine Controls - System/Component Tests): Introduction

WARNING: This page is about a different car, the 1997 Jaguar XJR. 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 TESTING article. Since many computer-controlled and monitored components set a trouble code if they malfunction, also perform procedures in SELF-DIAGNOSTICS - 4.0L 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.
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