2.
Start and warm the engine until the coolant tem-
perature is at least 150°F (66°C).
3.
Select OK when the DPF screen is displayed on
the driver display screen. See
Fig. 14.2. Select
OK again to confirm regen. As the regen process
is initiated, engine rpm increases and the HEST
lamp illuminates to indicate extremely high ex-
haust temperatures.
IMPORTANT: The driver is responsible for
ensuring, during the entire regen cycle, that
anything that could be harmed by exposure to
high heat does not come in contact with the
exhaust gases flowing from the outlets.
4.
The regen cycle will finish after 20 to 60 minutes,
at which time engine idle speed drops to normal
and the vehicle can be driven normally. The
HEST lamp is extinguished when vehicle speed
exceeds 5 mph (8 km/h) or the system has
cooled to normal operating temperature.
5.
To stop a parked regen at any time during the
process:
•
depress the clutch pedal, brake pedal, or
accelerator pedal;
•
select OK on the parked regen screen
while the regen is active, then select OK
again to confirm;
•
press and hold the regen inhibit switch until
idle returns to normal;
•
shut down the engine.
ATS Warning Lamps and Messages
There are three warning lamps that alert the driver of
high exhaust temperature, the need to perform a
parked regen or service the DPF, or of an engine
fault that affects emissions. A decal attached to the
driver’s sun visor explains the ATS warning lamps.
Malfunction Indicator Lamp (MIL)
A steadily illuminated yellow malfunction indicator
lamp (MIL) indicates an engine fault that affects
emissions. See
Fig. 14.4.
DPF Status Lamp and Messages
When soot accumulates in the DPF, the driver dis-
play screen presents a DPF status bar. As the soot
level in the DPF reaches 60%, the DPF status lamp
illuminates. See
Fig. 14.5. Perform a parked regen
or bring the vehicle up to highway speed to increase
the load (thus starting an active regen). After the soot
level in the DPF reaches 80%, a parked regen is
necessary.
For an explanation of DPF zones, message screens,
warning lamps, and available regen modes, see
Table 14.3 (Detroit engines) or Table 14.4 (Cummins
engines).
If the DPF status lamp blinks and the driver display
screen shows a red status bar (90% full), initiate a
parked regen immediately in order to prevent an en-
gine derate.
If the DPF status lamp blinks, and the driver display
screen shows a DPF status bar that is fully red
(100% full), begin a parked regen in order to prevent
an engine shutdown. Park the vehicle and perform a
parked regen.
DPF Zones, Detroit Engines
DPF Zone DPF Status Bar Warning Lamps Regen Mode Available
0
f61139806/10/2016
0–10% Green
— • passive
Emissions and Fuel Efficiency
14.4
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