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Home >> Volvo >> 2000 >> S40 >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Central Electronic Module (CEM) - Design And Function (644 Body) >> Diagnostic Functions. Central Electronic Module (CEM) (2000-2004) >> Diagnostic Functions >> General

Diagnostic Functions: General

The control module has a built-in diagnostic system, the Volvo on-board diagnostic (OBD) system. This system continuously monitors itself and the input and output signals.

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