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Home >> Volvo >> 2005 >> XC90 Base, 2.5 59, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Miscellaneous Electrical - Design And Function >> Central Locking (2005-2014) >> Diagnostic Functions >> General Information
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General Information

The control modules have a built-in diagnostic system, Volvo Diagnostics, which continuously monitors internal functions as well as input and output signals. The central locking system is a distributed system which stores diagnostic trouble codes (DTCs) in different control modules depending on where the fault occurred.

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