BMW 3 Owners & Service Manuals

BMW 3: Connections

The connections at the Electrical Machine Electronics can be divided into four categories:

  • Low-voltage connections
  • High-voltage connections
  • Connection for potential compensation line
  • Connections for coolant lines.

Connections
Connections of the Electrical Machine Electronics with lines

  1. Connection for potential compensation line
  2. Low-voltage connector
  3. High-voltage cable (DC) to the high-voltage battery unit
  4. High-voltage connection to convenience charging electronics
  5. Output, DC/DC converter -12 V
  6. High-voltage cable (AC) to the electrical machine
  7. Coolant feed line
  8. Coolant return line
  9. Output, DC/DC converter +12 V
  10. Ventilation

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 Low-voltage connections

In the low-voltage connector at the Electrical Machine Electronics the following lines and signals are combined: Terminal 30 from the hybrid power distribution box Terminal 30 from the f

 High-voltage connections

At the Electrical Machine Electronics, there is a total of three high-voltage connections to connect the lines for other high-voltage components. The connections for the electric A/C compressor and

 High-voltage cables

The high-voltage cables connect the high-voltage components and are identified by orange cable sleeves. The manufacturers of hybrid cars have agreed on a uniform identification of the high-voltage c

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 Engine oil

General information The engine oil consumption is dependent on your driving style and driving conditions. Therefore, regularly check the engine oil level after refueling by taking a detailed measurement. The engine oil consumption can increase in the following situations, for instance: Sporty dr

 Steering and traffic jam assistant

Concept The system assists the driver in keeping the vehicle within the lane. For this purpose, the system executes supporting steering movements, for instance when driving in a curve. General information The system determines the position of the lane markings and the vehicle driving ahead using fiv

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