Paccar MX Series User Manual

PEC017
5/3/2018 Page 88 of 105
Activate/Deactivate Requirements
Activate
Deactivate
Accelerator pedal not pressed
Accelerator pedal pressed
Foot brake not pressed
Foot brake pressed
Clutch pedal not pressed if equipped
Clutch pressed if equipped
Vehicle in neutral
Vehicle not in neutral
Parking brake set
Parking brake not set
DPF regen switch is not set to ‘inhibit’
DPF regen switch set to ‘inhibit’
Vehicle speed = 0
Vehicle speed > 0
No related engine or aftertreatment
faults
Related engine or aftertreatment faults, ie:
BPV, VGT, aftertreatment overtemps, pre-
DOC temp etc.
Coolant at operating temp
Coolant not at operating temp
Engine load less than 600 lb-ft*
Engine load greater than 600 lb-ft*
If PTO active, engine speed greater
than 900 RPM**
If PTO active, engine speed less than 900
RPM**
* Engine load threshold varies based on engine speed
** Engine speed threshold varies based on ambient conditions
Additional Information
Even with Auto HC Desorb enabled, Manual HC Desorb functionality is still available.
If Auto HC Desorbs are not successful or are aborted by the user, it is possible that a
Manual HC Desorb will be requested on the dash and a driver must complete the
Manual HC Desorb before driving. Occurrences of Auto HC Desorb or Manual HC
Desorb are normal and do not indicate any issues with the truck.
If an Auto HC Desorb is occurring, the driver is able to cancel the Auto HC Desorb by
pressing the brake pedal and drive the truck. As long as there is a “DO NOT DRIVE”
notification, do not drive the truck.
If an Auto HC Desorb is aborted by the user (for example, by pressing the service
brake), another Auto HC Desorb will restart 10 minutes later if all enable conditions
are met again. If Auto HC Desorbs are not desired by the customer, they can be
inhibited by using the regen inhibit switch or disabled via PVP. If the regen inhibit
switch is used, the driver must remember to un-inhibit the regen switch before starting
to drive.
Depending on NAMUX version and software level, some vehicles may display a
notification of a pending Auto HC Desorb and during an active Auto HC Desorb. If
Auto HC Desorb notifications are available, a 2-minute countdown will be initiated
prior to the Auto HC Desorb to alert the driver an Auto HC Desorb is being initiated.

Paccar MX Series Specifications

General

Engine Type	Diesel
Configuration	Inline 6-cylinder
Displacement	12.9 liters
Torque Range	1850 lb-ft
Emission Standard	GHG17
Bore	5.12 inches (130 mm)
Aspiration	Turbocharged
Fuel System	Common Rail