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Home >> Volvo >> 2007 >> XC70 >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Alarm System, Control Modules, Engine Management Systems - Design And Function) >> Central Locking (2005-2007) >> Diagnostic functions >> General

Diagnostic functions: General

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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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