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Home >> Volvo >> 2004 >> V40 Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Transmission - Design And Function >> Diagnostic Functions (Aw55-50/51SN; 2001-2004) >> Transmission control module (TCM) diagnostic functions >> General
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Transmission control module (TCM) diagnostic functions: General

Fig 1: Identifying Control Module
GLL112744Courtesy of VOLVO CARS OF NORTH AMERICA.

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

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