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Electrical function schematic for exhaust treatment - PE14.00-P-2051-97DAM

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ENGINE 642.8 in MODEL 212 as of model year 2014 with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) 

Code: Designation: Position:
1 Engine diagnosis indicator lamp, actuation 19J
1 Engine diagnosis indicator lamp, actuation 23K
1 Engine diagnosis indicator lamp, actuation 24J
10 AdBlue® injection, message 14D
11 Oil temperature sensor, signal 9E
12 Fuel injectors, actuation 7C
13 Intake port shutoff actuator motor, actuation 9B
14 Oxygen sensor element, signal 11D
15 Temperature sensor upstream of turbocharger, signal 10D
16 Temperature sensor upstream of diesel particulate filter, signal 13G
17 Differential pressure sensor (DPF), signal 12H
18 Temperature sensor upstream of SCR catalytic converter, signal 11H
19 Temperature sensor upstream of catalytic converter, signal 10H
2 Glow, request 4F
20 Accelerator pedal sensor, signal 9G
21 AdBlue® metering valve, actuation 19C
22 Engine speed, signal 9G
23 Circuit 87, status 9E
24 Temperature sensor downstream of catalytic converter, signal 9G
25 Temperature sensor downstream of diesel particulate filter, signal 13F
3 Glow plugs, actuation 3J
4 Shift point, increase request 14C
5 Outside temperature, signal 13E
6 AdBlue® injection, request 19C
7 NOx sensor heater, actuation 22D
7 NOx sensor heater, actuation 21C
7 NOx sensor heater, actuation 25D
7 NOx sensor heater, actuation 24C
8 NOx sensor, signal 13D
8 NOx sensor, signal 22C
8 NOx sensor, signal 25C
9 AdBlue® fill level, message 14D
A1 Instrument cluster 25J
A1e58 Engine diagnosis indicator lamp 24H
A1p13 Multifunction display 26J
B1 Oil temperature sensor 5D
B16/15 Temperature sensor upstream of SCR catalytic converter 11K
B19/11 Temperature sensor upstream of turbocharger 9A
B19/14 Temperature sensor downstream of diesel particulate filter 6J
B19/7 Temperature sensor upstream of catalytic converter 10K
B19/8 Temperature sensor downstream of catalytic convertor 16G
B19/9 Temperature sensor upstream of diesel particulate filter 15J
B28/8 Differential pressure sensor (DPF) 13K
B37 Accelerator pedal sensor 7J
B70 Crankshaft Hall sensor 5G
CAN C Drive train CAN 13C
CAN E1 Chassis CAN 1 15F
CAN E2 Chassis CAN 2 21K
CAN I Drive train sensor CAN 15E
G3/2b1 Sensor element of oxygen sensor upstream of catalytic converter 11A
LIN C1 Drive train LIN 6F
M55 Intake port shutoff actuator motor 8A
N10/1 Front SAM control unit with fuse and relay module 2C
N10/1 Front SAM control unit with fuse and relay module 18J
N10/1kN Engine circuit 87 relay 4C
N118/5 AdBlue® control unit 19A
N14/3 Glow output stage 2F
N3/9 CDI control unit 11E
N37/7 Nitrogen oxides control unit downstream of diesel particulate filter 21B
N37/7b1 NOx sensor downstream of diesel particulate filter 22D
N37/8 Nitrogen oxides control unit downstream of SCR catalytic converter 24B
N37/8b1 NOx sensor downstream of SCR catalytic converter 24D
R9/1 Cylinder 1 glow plug 1J
R9/2 Cylinder 2 glow plug 1J
R9/3 Cylinder 3 glow plug 1K
R9/4 Cylinder 4 glow plug 1K
R9/5 Cylinder 5 glow plug 1K
R9/6 Cylinder 6 glow plug 1K
U244 Valid for BlueTEC 9K
U244 Valid for BlueTEC 5H
U244 Valid for BlueTEC 15F
U244 Valid for BlueTEC 16A
Y129 AdBlue® metering valve 20D
Y3/8 Fully integrated transmission control unit 14A
Y76/1 Cylinder 1 fuel injector 6A
Y76/2 Cylinder 2 fuel injector 6B
Y76/3 Cylinder 3 fuel injector 6B
Y76/4 Cylinder 4 fuel injector 6B
Y76/5 Cylinder 5 fuel injector 6B
Y76/6 Cylinder 6 fuel injector 6C
Fig 1: Exhaust Treatment Function Diagram (1 Of 2)
G10054479Courtesy of MERCEDES-BENZ USA
Fig 2: Exhaust Treatment Function Diagram (2 Of 2)
G10054480Courtesy of MERCEDES-BENZ USA