Operators Manual

Table Of Contents
When the parked regeneration request is accepted, the Diesel Particulate Filter
(DPF) Regeneration lamp will turn ON one time for one second and then turn off
for the remainder of the parked regeneration. The High Exhaust System
Temperature (HEST) lamp will flash for one second every ten seconds and
eventually become solid when the tailpipe temperature is above 525°C (977°F).
The engine speed may vary during parked regeneration (depending on engine
displacement, exhaust temperature and the amount of soot accumulated in the
DPF). The regeneration is complete when the engine returns to low idle and the
DPF lamp remains OFF. The HEST lamp will remain ON, but the vehicle may be
driven.
NOTE: A parked regeneration will STOP and the engine will return to low
idle if any of the following happens:
The key is turned to the OFF position
The vehicle is put into gear
The clutch is cycled
The parking brake is released
NOTE: If a parked regeneration is being performed to check NOx
conversion, the calculated ambient temperature in the ACM (AS053) must
be above 0°C (32°F) or the test will fail.
NOTE: If the HEST LAMP is FLASHING, regeneration is in process and the
system is coming up to temperature.
1. Keep engine at slow idle (cannot be in Fast Idle or PTO Mode). Put
transmission in neutral (if equipped with an automatic transmission, cycle it
into gear and then back to neutral).
2. Set park brake (cycle the park brake OFF then ON).
3. Press and release clutch pedal once per ignition cycle (if configured).
4. Hold DPF Switch to the ON position for five seconds and then release
(engine speed will increase and DPF lamp will go out).
DD Heavy Duty Platform Operators Manual
All information subject to change without notice. 101
DDC-SVC-MAN-0189 Copyright © 2022 DETROIT DIESEL CORPORATION