Paccar Peterbilt 567 2021, Manual

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Engine Aftertreatment System
This vehicle has an Engine Aftertreatment
System (EAS), to control vehicle exhaust
emissions. The Engine Aftertreatment
system consist of a Diesel Particulate Filter
(DPF), Selective Catalyst Reduction
(SCR), DPF Switch and warning lights. The
DPF will trap soot from the engine exhaust
gases. The SCR uses Diesel Exhaust Fluid
to reduce the levels of NOx in the engine
exhaust. The EAS will periodically clean
(regenerate) the DPF.
Your vehicle may be equipped with an
additional feature designed to alert a
remote operator that the aftertreatment
system requires a regeneration. When the
EAS detects a heavily loaded DPF it will
sound the city horn for 10 seconds while
continuously flashing the vehicle
headlamps. The operator can resolve and
reset the alert by performing a parked
regeneration. Alternatively, the notification
can be dismissed by pressing the clutch or
the service brake. Dismissing the alert
does not reset it, the next alert will occur at
the next higher soot level if a parked
regeneration is never performed.
Engine Aftertreatment System Detail
1
2
3
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1. Hydrocarbon doser from turbo
2. Aftertreatment unit (DPF, DEF
doser and SCR)
3. Filtered/treated exhaust
4. Diesel exhaust fluid (DEF) tank
Please refer to the Engine Aftertreatment
System Supplement provided with the
vehicle for more detailed description of
functionality and warnings.
Driver Assistance
Driver Assistance (or Advanced Driver-
assistance Systems (ADAS)) defines a
variety of electronic features which assist
the operator while driving. These features
use automated technology to improve
operator and vehicle safety by alerting the
operator (and in some cases taking
actions) to the driving environment. The
Driver Assistance features use electronic
and hardware improvements in order to
accomplish this task: cameras, radar,
sensors, driving automation, and in-cab
notifications.
The features described in this section
should supplement the explanations,
warnings, and preventative maintenance
information located in the ADAS OEM
operator’s manuals for the equipment
particular to the vehicle. It is important that
the operator familiarize themselves with
the OEM manuals associated with their
ADAS equipment prior to driving the
vehicle.
DRIVING - Driver Assistance
Y53-6126-1A1 (01/21) 141
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