Diagnostic Tests: Notes

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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).

NOTE: For Engine Control Module (ECM) connector terminal identification referenced to in testing procedure. See Fig 1.

NOTE: For an overall view of emission related components, see Fig 2.

Fig 1: Identifying Engine Control Module Connector Terminals

Fig 2: Emission Related Component Locations