DME control unit

Important functions of the engine control system with regard to BMW EfficientDynamics  are:

• Intelligent generator control
• Automatic engine start-stop function

There are 3 other sensors on the printed circuit board in the DME control unit: a temperature sensor, an ambient pressure sensor as well as a voltage sensor. The temperature sensor provides thermal monitoring of the components in the DME control unit. The ambient pressure is required for calculation of the mixture composition. The ambient pressure falls the higher you go above sea level. The voltage sensor on the printed circuit board of the DME control unit monitors the voltage supply via terminal 87.

The DME control unit is connected to the vehicle electrical system via the engine wiring harness and vehicle wiring harness (3 connector chambers). The DME control unit is connected to the rest of the bus system by the PT-CAN (powertrain CAN) via a gateway. The gateway is the junction box electronics (JBE).

Fig 1: Identifying DME Control Unit And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.