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
Important: The vehicle can have two different ways to initiate a parked regen, depending on the body builder. If there is not a regen switch on the dash, go to the Shorting Plug section.
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 DPF lamp must be illuminated before the regen switch will initiate a parked regen.
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, it must be released, then set 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
- The regen cycle will finish after 20 to 60 minutes, at which time engine idle speed will drop to normal and the vehicle can 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 accelerator pedal, or turn off the engine.
Important: The driver must remain with the vehicle during the entire regen cycle.