IC Bus CE Series 2020, Operation And Maintenance Manual

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Operation
Indicators about Low DEF Level (For Vehicles Equipped with Cummins ® B Engines) (cont.)
Level Indication Audible Alarm
Liquid Crystal Display (LCD)
Text Message
Vehicle Conditions / Operation
5
(Flashing)
(Solid)
(Solid)
1 beep
Scrolls between SEE VISOR
FOR INFO, DEF LOW ENG
DERATED 5MPH, WARN
ENGINE, and STOP ENGINE.
Vehicle speed is limited to 5
mph (8 km/h).
DEF Contamination or SCR System Fault
WARNING
To prevent personal injury and / or death, or
damage to property, seek service immediately
if Diesel Exhaust Fluid (DEF) contamination or
Selective Catalyst Reduction (SCR) system fault
is detected.
• Failure to resolve the problems may result in
a loss of engine power and vehicle speed, and
may cause an accident.
If incorrect liquid is in the DEF tank or if some other fault is
detected within the SCR system, the Amber Warning Lamp or
Malfunction Indicator Lamp will illuminate. If no action is taken
in the initial warning stages, engine performance will be derated
by at least 25%, and eventually vehicle speed may be limited to
5 mph (8 km/h).
See the following tables for detailed explanation of DEF or SCR
system indicators.
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