Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 212
• DEF Tank
• Heated Lines x 3
• DEF Tank Header (for temp, level and quality sensors)
• Engine Coolant diverter valve
In all cases the engine ECM is used to control the activation of the DEF
dosing strategy and metering requirements. The local DCU controller
provides the individual system component control such as line heater
activation and direct DEF injector control.
The engine ECM uses information taken from system temperature sensors,
NOx monitoring hardware and software models to determine the required DEF
dosing rate as well as the boundary conditions for activation.
An example of the DEF system control during a normal engine work cycle is
shown in figure 16.3