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Home >> Volvo >> 2004 >> XC90 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Electronic Modules - Design And Function >> Engine Control Module (ECM) (B8444S; 2005-2011) >> Diagnostic Functions >> Overview >> Emission-Related Diagnostic Functions
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Emission-Related Diagnostic Functions

The engine control module (ECM) checks that the emission-related systems are working. These systems are checked by running a diagnostic function. The diagnostic function checks the components and that the system is functioning.

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