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Home >> BMW >> 2010 >> 335d >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Auxiliary Emission Control Systems >> Engine Emission Control Systems - Diesel >> Diesel Emission Control Systems >> Selective Catalytic Reduction >> SCR Control

SCR Control

The SCR control is integrated in the digital diesel electronics (DDE). The SCR control is divided into the metering system control and the metering strategy.

Fig 1: SCR Control Communication Diagram
G06896108Courtesy of BMW OF NORTH AMERICA, INC.
INDEX EXPLANATION CHART

Index Explanation
1 DDE 7.3
2 SCR control
3 Metering system control
4 Metering strategy
5 Injection pump
6 Transfer pump
7 Metering module
8 Heater
9 Reversing valve
10 Pressure sensor
11 Temperature sensor in active reservoir
12 Outside temperature sensor
13 Level sensor in active reservoir
14 Level sensor in passive reservoir
15 NOx sensor - pre SCR catalyst
16 NOx sensor - post SCR catalyst
17 Exhaust temperature sensor