Peterbilt 325 2017, Operator'S Manual, Page: 118 / 392

DASH- AND DOOR-MOUNTED CONTROLS
This vehilcle’s electronic system will
perform a ‘rationality check’ every time
the vehicle is started. This check is
to ensure that the service brakes are
working before allowing cruise control
to function. This safety feature is
designed to ensure that a driver is able
to cancel the cruise set speed by using
the service brake pedal. The system
will not allow cruise control operation if
it does not pass the ‘rationality check’.
The Driver Information Display will
prompt you to press the service brake
pedal if it has not been pressed since
the vehicle has been started.
Regeneration Switch
In order to meet 2007 EPA engine
emission requirements, vehicles
will have a either a two or three
position switch to help control and
maintain the exhaust Diesel Particulate
Filter. Please refer to the Exhaust
Aftertreatment System Supplement
provided with the vehicle for more
detailed information about the emission
control system.
START: Depressing the button in the
START direction for 4 to 8 seconds will
initiate a parked regeneration. Be sure
to release the button to ensure that
the system will begin the regeneration
cycle.
CENTER: (three position switch only)
Center is the normal position of the
switch. The center position will allow
an automatic regeneration to occur.
STOP: (three position switch only)
When STOP is pressed the system will
not regenerate under any conditions.
CAUTION
Do not leave the three position
switch in the STOP position unless
you need to cancel or stop regen-
eration. Leaving the switch in the
STOP position for extended periods
of time will result in increased soot
levels in the DPF.
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