Operators Manual

Table Of Contents
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, a 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).
NOTICE: Air tank pressure must be high enough for the parking brake
switch to hold in the OFF position.
2. Set park brake (cycle the park brake OFF then ON for CPC R21 or lower
software).
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. 99
DDC-SVC-MAN-0189 Copyright © 2022 DETROIT DIESEL CORPORATION