Diagnostic Tests: Introduction

NOTE: To diagnose all other input and output devices not included in the following diagnostic tests, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

NOTE: Diagnostic tests are diagnostic formats used to test and service EEC-V system. For DTCs related to engine performance concerns, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST) under SELF-DIAGNOSTIC SYSTEM allows technician to identify problems and retrieve DTCs. Diagnostic tests check transmission circuits, sensors, solenoids and actuators.

NOTE: Perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure.

Procedures in diagnostic tests are written for use with the following Ford Motor Co. test equipment:

Worldwide Diagnostic System (WDS) Scan Tool (418-F224) or New Generation Star (NGS) tester (007-00500) or equivalent.
Transmission Tester (007-00130).