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

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

Code: Designation: Position:
1 Engine diagnosis indicator lamp, actuation 17J
1 Engine diagnosis indicator lamp, actuation 20J
10 Shift point, increase request 17C
11 Glow, request 5F
12 Glow plugs, actuation 3F
13 Temperature sensor upstream of diesel particulate filter, signal 10G
14 Differential pressure sensor (DPF), signal 9G
15 Oil temperature sensor, signal 8G
16 Oxygen sensor, signal 8G
17 Accelerator pedal sensor, signal 7G
18 Fuel injectors, actuation 3J
19 Temperature sensor upstream of SCR catalytic converter, signal 7E
2 Multifunction display, actuation 18H
20 Engine speed, signal 7E
21 Intake port shutoff actuator motor, actuation 19D
22 Temperature sensor upstream of catalytic converter, signal 8D
25 NOx sensor heater, actuation 23D
25 NOx sensor heater, actuation 22C
25 NOx sensor heater, actuation 26D
25 NOx sensor heater, actuation 25C
26 NOx sensor, signal 23C
26 NOx sensor, signal 26C
3 NOx sensor, signal 10E
5 AdBlue® fill level, message 11E
5 AdBlue® fill level, message 17H
6 AdBlue® injection, request 19C
7 AdBlue® injection, message 11E
8 Temperature sensor upstream of turbocharger, signal 9D
9 Outside temperature, signal 10G
A1 Instrument cluster 16J
A1e58 Engine diagnosis indicator lamp 20J
A1p13 Multifunction display 19H
B1 Oil temperature sensor 7K
B16/15 Temperature sensor upstream of SCR catalytic converter 2D
B19/11 Temperature sensor upstream of turbocharger 9C
B19/7 Temperature sensor upstream of catalytic converter 7C
B19/9 Temperature sensor upstream of diesel particulate filter 10J
B28/8 Differential pressure sensor (DPF) 10K
B37 Accelerator pedal sensor 3K
B70 Crankshaft Hall sensor 2C
CAN C Drive train CAN 12E
CAN E Chassis CAN 12F
CAN E Chassis CAN 12G
CAN I Drive train sensor CAN 12E
Code 474 Diesel particulate filter 9J
G3/2b1 Sensor element of oxygen sensor upstream of catalytic converter 5K
LIN C1 Drive train LIN 6F
M55 Intake port shutoff actuator motor 6A
N10/1 Front SAM control unit with fuse and relay module 14J
N118/5 AdBlue® control unit 19A
N14/3 Glow output stage 4E
N3/9 CDI control unit 8E
N37/7 Nitrogen oxides control unit downstream of diesel particulate filter 22C
N37/7b1 NOx sensor downstream of diesel particulate filter 22E
N37/8 Nitrogen oxides control unit downstream of SCR catalytic converter 25C
N37/8b1 NOx sensor downstream of SCR catalytic converter 25E
R9/1 Cylinder 1 glow plug 1E
R9/2 Cylinder 2 glow plug 1F
R9/3 Cylinder 3 glow plug 1F
R9/4 Cylinder 4 glow plug 1F
R9/5 Cylinder 5 glow plug 1F
R9/6 Cylinder 6 glow plug 1G
U244 Valid for BlueTEC 18A
Y129 AdBlue® metering valve 20D
Y3/8 Fully integrated transmission control unit 16B
Y76/1 Cylinder 1 fuel injector 2H
Y76/2 Cylinder 2 fuel injector 2H
Y76/3 Cylinder 3 fuel injector 2J
Y76/4 Cylinder 4 fuel injector 2J
Y76/5 Cylinder 5 fuel injector 2J
Y76/6 Cylinder 6 fuel injector 2J
Fig 1: Exhaust Treatment Function Diagram (1 Of 2)
G10054483Courtesy of MERCEDES-BENZ USA
Fig 2: Exhaust Treatment Function Diagram (2 Of 2)
G10054484Courtesy of MERCEDES-BENZ USA