INSTALLATION
MANUAL
© Scania CV AB 2018, Sweden
Warnings and torque reduction for Stage IIIB/IV/Tier 4i/Tier 4f
01:07 Issue 17 en-GB 56
Reaction to fault in SCR system
Once the fault has been remedied and the engine control unit has received an indica-
tion that the SCR system is operating i.e. when the fault code has been acknowledged
in SDP3, torque returns to the normal level.
If a new fault occurs within 40 hours of operation since the first fault, the warning
lamp will come on. After 30 minutes of operation, the warning lamp will flash rap-
idly and torque will be reduced to 0% (low idling) within 30 minutes.
Time Warning lamp Torque reduction
1
1. Applies only to engines that are certified according to Tier 4.
Fault detected Constant light
After 30 minutes Flashes slowly (½ Hz) Torque is reduced by 1%
per minute to 70% of the
highest torque.
After 4 hours Flashes rapidly (2 Hz) Torque is reduced to 0%
(low idling) within 2-10
minutes.
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