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Functional networking

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The following system overview shows the functional networking from an electrical view.

Fig 1: Digital Diesel Electronics Functional Networking
G09910194Courtesy of BMW OF NORTH AMERICA, INC.

Example F30 with N47D20O1

Item Explanation
1 Digital diesel electronics (DDE)
2 SCR metering module
3 Front power distribution box, passenger's side
4 Front electronic module
5 Pressure line heating element
6 Pump block with pre-supply pump and return pump
7 Fill level sensor and heating element (active tank)
8 Selective catalytic reduction (SCR control unit)
9 Power distribution box, rear
10 Fill level sensor (passive tank)
11 Transfer pump
12 Instrument panel (KOMBI)
13 Temperature sensor, SCR catalytic converter
14 Nitrogen oxide sensor before SCR catalytic converter
15 Diesel particulate sensor (optional)
16 Nitrogen oxide sensor after SCR catalytic converter