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Home >> BMW >> 2019 >> X3 M40i >> Repair and Diagnosis >> External Pages >> Different car >> Section 576 (Functional Descriptions - F25 - Charging System, Anti-Theft, Body Electrical Systems) >> Body Electrical System - Functional Description >> Preheating system N47TU, N57TU >> Communication

Preheating system N47TU, N57TU: Communication

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The DDE control unit and preheating control unit communicate across the LIN bus.

The LIN bus is a bidirectional data interface based on the master-slave principle. The DDE control unit is the master controller.

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