Engine Controls - Tests W/Codes - 7.5L EEC-IV: Introduction
NOTE:
This article covers 7.5L with Federal emissions.
Perform all steps in the BASIC TESTING - 7.5L article. If no fault is found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. If no diagnostic trouble codes or only pass codes (system functioning properly) are found during self-diagnostics, proceed to the TESTS W/O CODES - 7.5L article for diagnosis by symptom.