LDM Overview

The LDM is a control module that is used for drivetrain and brake coordination purposes, plus provides significant improvement with regard to automatic cruise control (ACC or DCC) with a general control function capability ranging from requesting acceleration to requesting braking (integrated function).

Interface: PT-CAN

The LDM serves two primary functions:

• Variant handling - LDM functions are configuration dependent (coding-relevant function)
• LDM safety functions are ensured by a central monitoring and redundancy check.
  Fig 1: LDM Communication Diagram

  Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Longitudinal Dynamics Management - Input/Output Signal

Courtesy of BMW OF NORTH AMERICA, INC.