SHOP MANUAL
Engine
Ch 1 page 26
1. Control unit EEC3 (E67)
The EEC3 control unit retrieves data from the system’s sensors and components. EEC3 communicates with the
engine control unit EMS. EMS decides on what measures are to be executed, e.g. what quantity of reductant is
to be metered to the exhaust gases, and notifies EEC3. The EEC3 control unit is independently responsible for
the functions which supply reductant to the exhaust gases.
The EEC3 control unit is located on the reductant tank bracket underneath the reductant tank.
3. Temperature sensor (T113)
There is a temperature sensor for measuring the exhaust gas temperature at the intake to the SCR catalytic
converter. This sensor reports to EEC3, which notifies EMS. The temperature sensor is located on the SCR
catalytic converter at the exhaust gas intake.
2. Coolant valve (V118)
There is an electrically controlled water valve for the coolant flow from the engine’s cooling system to the reduc-
tant tank. The coolant heats the reductant in the reductant tank and the reductant pump at low outdoor tempera-
tures. The position of the water valve varies according to the engine installation.
Figure 39
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