Diagnostic Tests: Notes

NOTE: Before performing any diagnostic test, see SELF-DIAGNOSTIC SYSTEM for diagnostic system functions and system diagnostic procedures. Also check for any related Technical Service Bulletins (TSBs). For component location, see appropriate illustration in THEORY & OPERATION article.

NOTE: When performing diagnostic tests, it may be necessary to identify Engine Control Module (ECM) harness connector terminals referenced in testing. See Fig 1.

Fig 1: Identifying Engine Control Module Harness Connector Terminals