DPF Zones, Cummins Engines
DPF Zone DPF Status Bar Warning Lamps Regen Mode Available
5
f61140306/10/2016
80–100% Red
DPF flashing yellow
HEST solid yellow
*
• parked
*
Illuminates if exhaust temperature is above a preset limit.
Table 14.4, DPF Zones, Cummins Engines
High Exhaust System Temperature
(HEST) Lamp
Slow (10-second) flashing of the high exhaust sys-
tem temperature (HEST) lamp indicates that a
parked regen is in progress, and the engine’s high
idle speed is being controlled by the engine software,
not the vehicle driver.
Steady illumination of the HEST lamp alerts the
driver of high exhaust temperature during the regen
process if the vehicle speed is below 5 mph (8 km/
h), or during a parked regen. See
Fig. 14.6.
Maintenance
Authorized service facilities must perform any DPF
service. For warranty purposes, maintain a record
that includes:
•
date of cleaning or replacement;
•
vehicle mileage;
•
particulate filter part number and serial number.
Diesel Exhaust Fluid and Tank
Diesel Exhaust Fluid
Diesel exhaust fluid (DEF) is used in the ATS to
lower NOx in the exhaust stream. DEF is colorless
09/25/2006 f610814a
Fig. 14.4, Malfunction Indicator Lamp (MIL)
09/25/2006 f610815a
Fig. 14.5, DPF Status Lamp
f611430a09/09/2016
Fig. 14.6, HEST Lamp
Emissions and Fuel Efficiency
14.7
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