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System/Component Tests - EFI: Introduction

Prior to testing separate components or systems, it is highly recommended that all procedures listed in the BASIC TESTING - EFI article be performed. Since many computer controlled and monitored components will set a trouble code if they malfunction, it is also recommended that self diagnosis be performed. Refer to the TESTS W/CODES - EFI article.

NOTE: Testing of individual components does not isolate possible shorts or opens in the control harness of electronically controlled systems. Use an ohmmeter to isolate shorts or opens in harness.
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