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Home >> Chevrolet >> 1999 >> Cavalier L4-2.2L VIN 4 >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Engine Control Module >> Diagrams >> Diagram Information and Instructions >> How To Use Electrical Diagnosis >> Diagnostic System Checks

Diagnostic System Checks

IMPORTANT: Misdiagnosis could occur if the diagnostic system check is not performed before using the diagnostic tables.

The diagnostic system check determines the diagnostic trouble codes (DTCs) present, verifies proper communication, and navigates to the appropriate diagnostic table.
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