Section 94 (Engine Controls - System & Component Tests - EEC-V - NGV): Introduction: Notes

WARNING: This page is about a different car, the 2002 Ford Pickup, 2002 Ford Econoline, 2002 Ford Cutaway, and 2002 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: References to Econoline include Cutaway and RV Cutaway models.

WARNING: Before performing any tests or diagnostics on CNG or LPG components or systems, read all cautions and warnings in CNG/LPG SAFETY PRECAUTIONS article in GENERAL INFORMATION.

NOTE: System and component testing included in this article is for NGV fuel systems only. For gasoline fuel system and component testing, see SYSTEM & COMPONENT TESTING - EEC-V - GASOLINE article. Since many computer-controlled and monitored components set a Diagnostic Trouble Code (DTC) when a malfunction occurs, check for Powertrain Control Module (PCM) DTCs prior to testing an individual system or component. Perform QUICK TEST procedures in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. If no DTCs are present, perform SYMPTOM DIAGNOSIS under SYMPTOMS in TROUBLE SHOOTING - NO CODES - EEC-V - GASOLINE & NGV article to diagnose driveability problems existing when a hard fault code is not present.

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 DVOM to isolate shorted or open wiring harness. For identification of circuits and terminals referenced in test procedures, see WIRING DIAGRAMS article.