Engine Controls - Tests W/Codes - 5.4L: Introduction

NOTE: Vehicles use EEC-V (104-pin PCM) system.

Perform all BASIC DIAGNOSTIC PROCEDURES in appropriate article:

For Expedition, see BASIC TESTING - 5.4L.
For Navigator, see BASIC TESTING .

If no fault is found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. If no diagnostic trouble codes or only pass codes are found during self-diagnostics, proceed to TESTS W/O CODES article for diagnosis by symptom.