Shorting Plug

s2 dm 09.01.000

Note: The DPF lamp must be illuminated before the shorting plug will initiate a parked regen. See Fig..

Fig. 1, Diesel Particulate Filter (DPF) Status Lamp

The shorting plug is used to initiate a parked regen of the ATD. The shorting plug is located under the dash, next to the steering column. Mounting locations vary. See Fig..

  1. Primary Lock

  2. Secondary "Red" Lock

  3. Plug

Fig. 2, Shorting Plug

To initiate a parked regeneration, perform the following steps.

  1. 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).
  2. 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.

    3. 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.

  3. Disconnect the shorting plug, as follows.
    1. Slide the secondary red lock away from the white cover. See Fig., Ref. 2.
    2. Push the primary lock in. See Fig., Ref. 1.
    3. Pull the plug apart. See Fig., Ref. 3.
  4. Wait four seconds.
  5. Connect the shorting plug.
  6. Engine rpm will rise, and initiate the regen process.
  7. 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. See Fig.. The DPF lamp will shut off.
  8. To stop a parked regen at any time during the process, engage the clutch, service brake, or accelerator pedal, or turn off the engine.

    Fig. 3, High Exhaust System Temperature (HEST) Lamp

Note:
Parent topic: Aftertreatment System, EPA10 and Newer Engines
Document Number: 0000119398
Manual Publication Date: 2024-05-17
Topic Publication Date: 2024-05-13