Parked Regen
Danger: During parked regeneration, exhaust temperatures are very high, and could cause a fire, heat damage to objects or materials, or personal injury to persons near the exhaust outlet.
Before initiating a parked regeneration, make certain the exhaust outlets are directed away from structures, vegetation, flammable materials, and anything else that may be harmed by prolonged exposure to high heat.
A reference label is included with the driver's documentation package initially in the glove box, that explains the ATS warnings, and actions required to avoid further engine protection sequences. See Fig..
Fig. 1, Exhaust-Aftertreatment Warnings Reference Label
The regen switch, located on the dash, is used to initiate a parked regen of the aftertreatment device. See Fig..
Fig. 2, Regen Switch
Note: The regen switch can initiate a parked regen only when the DPF lamp is illuminated (because the engine software is signaling for a parked regen).
The regen-inhibit switch (optional when available) provides additional control over the aftertreatment regeneration process. Depressing the regen-inhibit switch will prevent a regen from occurring during a drive cycle. After the vehicle has been shut down and restarted, regens will occur normally unless the inhibit switch is pressed again. See Fig..
Fig. 3, Regen Inhibit Switch (optional when available)
To initiate a parked regeneration, perform the following steps.
- Park the vehicle away from all combustible and flammable materials. Chock the tires. Start and warm the engine until the coolant temperature is at least 150°F (66°C).
- Set the parking brake. If the parking brake was already
set, you must release it, then set it again.For manual transmissions, fully depress the clutch pedal, put the transmission in neutral, then release the pedal.If the vehicle has a two-pedal automated transmission, shift it into gear, then back to neutral.
- Press and hold the regen switch for 4 seconds. The engine will increase rpm and initiate the regen process.
- After the parked regen has run for 20 to 40 minutes, the regen cycle is completed. The engine idle speed will drop to normal, and the vehicle may be driven normally. The HEST lamp may be illuminated, but will go out when the vehicle speed exceeds 5 mph (8 km/h), or the system has cooled to normal operating temperature.
- To stop a parked regen at any time during the process, engage the clutch, brake, or throttle pedal, or turn off the engine.
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.