Chevrolet Low Cab Forward 2023 Manual page 153

152 Driving and Operating
5. The DPF warning light will go out and
the high exhaust system temperature
indicator light will appear.
6. Do not leave the vehicle during the
regeneration. Regeneration normally
completes in about 45 to 90 minutes.
7. When the high exhaust system
temperature indicator light goes out,
regeneration is completed. Normal
driving is then possible.
When operating the PTO for a long time, be
sure to monitor the DPF warning light. If the
warning light comes on, stop the PTO and
perform "Switch" DPF regeneration.
Once the "Automatic" regeneration is
started, it cannot be switched to the
"Running" regeneration if interrupted.
When the "Switch" regeneration is selected,
complete regeneration in a single operation
if possible.
During DPF regeneration, the engine speed
may vary, causing the exhaust brake valve
to be deactivated. However, while the high
exhaust system temperature indicator light
appears, regeneration is still taking place, so
continue to allow regeneration until the
indicator light goes off.
The time needed to complete regeneration
differs depending on the outside
temperature.
The exhaust brake or exhaust throttle is
activated during DPF regeneration. The
exhaust brake or exhaust throttle starting to
operate or being disengaged will produce a
sound, but this does not indicate a failure.
During regeneration, white smoke may be
temporarily produced from the exhaust pipe.
This results from combustion of PM, it does
not indicate a failure.
"Switch" regeneration will complete earlier
immediately after driving than when the
engine is cold.
The engine coolant temperature may rise
during switch regeneration.
Interruption of Switch Regeneration
If you must interrupt regeneration, the high
exhaust system temperature indicator light
will go out and the DPF warning light will
turn on. If you interrupt Switch
regeneration, the regeneration must be
completed again using Switch regeneration.
Perform the Switch regeneration procedure
as soon as possible.
"Switch" regeneration will be interrupted in
the following circumstances.
Accelerator pedal is pressed
Selector lever is moved to a driving range
(R, OD, 3, 2, or 1) position
Vehicle speed is above 0 km/h (0 MPH)
Engine speed increases
Operation noise caused by interruption is
louder when depressing the accelerator
pedal than other operations. This is not a
failure.
DPF Regeneration during Prolonged
Idling
Automatic DPF regeneration may be
initiated during prolonged idling. If this
occurs, the high exhaust system
temperature indicator light will come on.
This is normal and does not indicate a
failure.
If Automatic regeneration that is started as
a result of prolonged idling is interrupted
(by either driving the vehicle or activating a
PTO), the high exhaust system temperature
indicator light will go out and the DPF
warning light will come on. Perform "Switch"
regeneration soon in order to complete the
DPF regeneration.