Operation Section
126
SCR system tampering for USA / Europe
There are several tampering level points at which the DEF indicator lamp lights up or blinks and the display
shows a message to warn that the DEF/Ad-Blue is not being consumed due to the malfunctioning of the SCR
system, the installation of another device to the system, or the handling of related parts. The lower the point,
the more the system limits the engine power and speed. As shown in the table below, for your information, we
provide correlation of SCR tampering inducement strategy and LCD display.
SCR system Tampering for USA
Inducement
Stage
Condition
Repeat
Offence
(within
40hrs)
Inducement Strategy
DEF Level
Indicator
DEF
Indicator
Engine
Check
Lam
Buzzer
Torque
Reduction
RPM Limit
Normal
NA NA Green ON Off Off Off 0% NA
Level1
Tampering
was
detected
NA Green ON On Off Off 0% NA
Level2
0.5~2.5hrs
Immediat
ely
Green ON On On
At starting &
Every 20min
25% NA
Level3
2.5~3.5hrs 9~25min Green ON Blinking On Every 10min 50%
60%
(about
1500rpm)
Level4 over 3.5hrs
over
25min
Green ON Blinking Blinking Every 5min 0%
Fix at Low
Idle RPM
Inducement
Stage
Condition
Repeat
Offence
(within 40hrs)
LCD Display
Method Message on the Display
Normal
NA NA NA NA
Level1
Tampering
was detected
NA At starting & Every 20min
SCR SYSTEM MALFUNCTION
CALL DOOSAN SERVICE AGENT
Engine Power Reduced in 30min
Level2
0.5~2.5hrs Immediately At starting & Every 20min
SCR SYSTEM MALFUNCTION
CALL DOOSAN SERVICE AGENT
Engine Power is Reduced By 25%
Level3 2.5~3.5hrs 9~25min Every 10min
SCR SYSTEM MALFUNCTION
CALL DOOSAN SERVICE AGENT
Engine Power is Reduced By 50%
Level4 over 3.5hrs over 25min Continuous
SCR SYSTEM MALFUNCTION
CALL DOOSAN SERVICE AGENT
Engine can run LOW IDLE ONLY
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