Section 220 (Engine Controls - System & Component Tests - 7.3L Diesel): Introduction

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Since many computer-controlled and monitored components set a trouble code if they malfunction, perform QUICK TEST in the TESTS W/CODES - 7.3L DIESEL article. Service codes as necessary.

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.