INSTALLATION
MANUAL
© Scania CV AB 2018, Sweden
System overview – Stage IV/Tier 4f and Stage III B/Tier 4i
01:07 Issue 17 en-GB 21
System overview of electrics
Connection of harness-to-harness connectors on the reductant tank is described in
section Connecting the reductant tank
. Connection to the engine control unit is de-
scribed in 03:01 Electrical system.
Component Fitted by fit-
ter
1 Engine interface for SCR system -
2 Cable harness between engine and EEC3 control unit x
3 Electrical cable for NO
x
sensor downstream of the turbo-
charger
1
1. Only Stage IV/Tier 4f.
x
4 Electrical connection to SCR system -
5 Electrical cable for reductant doser x
6 Electrical cable for exhaust gas temperature sensor x
7 Electrical cable for NO
x
sensor on the outlet side of the SCR
catalytic converter
x
4
6
5
2
3
7
1
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