Requirements To Ensure The Correct Operation Of Nox Control; System (R750Eu6 Engine Models) - VM R750EU6 - TE4 Bedienungsanleitung

REQUIREMENTS TO ENSURE THE CORRECT OPERATION OF NOx CONTROL

SYSTEM (R750EU6 ENGINE MODELS)

In the engines equipped with SCR system a driver warning and a two levels driver indu-
cement system have to be implemented, so that the users will not continue to operate the
vehicle without correcting the concern.
The inducement system comprises a driver warning inducement lamp (DWS)
two levels of torque reduction:
- first level: torque reduction of 25% and a disablement of the vehicle,
- second level: limitation of the vehicle speed to a max. of 20 km/h ("creep mode"), if a
defect is not repaired in a timely manner
The malfunctions may be:
1. DEF fluid low level
2. Identification of incorrect DEF fluid
3. Monitoring system tampering
4. DEF fluid dosing interruption
5. EGR valve blocked
6. Incorrect AdBlue consumption
7. DEF fluid freeze
(*)
for those vehicles not equipped with speed sensor the limitation will be 60% of
rated engine RPMs and 50% of torque reduction.
DRIVER WARNING SYSTEM ACTIVATION (DWS LAMP)
- Inform the operator that a condition has occurred which compromises the vehicle emis-
sion control system.
- Visual (DWS Lamp) and possibly audible alarms on the dashboard
- Designed such that it cannot be defeated, ignored, or disabled without correcting the
concern.
- Activation of the warning system is linked to the status of the corresponding Diagnostic
Trouble Code (DTC). If one of the malfunctions listed in table is detected and the corre-
sponding DTC has got the status active the inducement warning lamp is turned ON.
English
R750EU6 - TE4 - IE4 - ISE4
(*)
.
43
GB
and a
2056G