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Engine Control Module|Testing and Inspection > < System Overview|Page 4434
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Engine Control Module: Description and Operation
Diagnostic Functions

Diagnostic functions

Overview

See: Overview See: Computers and Control Systems/Description and Operation/General Overview 

Misfire diagnostics

See: Misfire diagnostics See: Computers and Control Systems/Description and Operation/Engine Management System/Diagnostic Functions/Misfire
Diagnostics 

Camshaft diagnostics (CVVT)

See: Camshaft diagnostics (CVVT) See: Computers and Control Systems/Description and Operation/Engine Management System/Diagnostic
Functions/Camshaft Diagnostics (CVVT) 

Leak diagnostics (only certain markets)

See: Leak diagnostic See: Computers and Control Systems/Description and Operation/Engine Management System/Diagnostic Functions/Leak
Diagnostics (Certain Markets Only)/Leak Diagnostic 

Heated oxygen sensor diagnostics

See: Heated oxygen sensor diagnostics See: Computers and Control Systems/Description and Operation/Engine Management System/Diagnostic
Functions/Heated Oxygen Sensor (HO2S) Diagnostic 

Three-way catalytic converter (TWC) diagnostics

See: Three-way catalytic converter (TWC) diagnostics See: Emission Control Systems/Catalytic Converter/Description and Operation/Three-way
Catalytic Converter (TWC) Diagnostics 

Fuel pressure control, diagnostics (2003-2004 only certain markets, 2005-)

See: Fuel pressure control, diagnostics See: Computers and Control Systems/Description and Operation/Engine Management System/Diagnostic
Functions/Fuel Pressure Control, Diagnostics 

Engine Control Module|Testing and Inspection > < System Overview|Page 4434