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Home >> Audi >> 2002 >> S4 Quattro, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.7L Turbo >> Self-Diagnostic System >> Testing Procedure
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Testing Procedure

Begin testing by performing an underhood preliminary inspection. See PRELIMINARY INSPECTION  under SELF-DIAGNOSTIC SYSTEM. If no faults were found during preliminary inspection, proceed with self-diagnostics. See SELF-DIAGNOSTIC SYSTEM . Use illustrations to locate various underhood engine performance components, see COMPONENT LOCATIONS .