2026-08-21

Pressurize / Depressurize - Full System (Test/Adjust)

Correction code 31101500 FRT 0.30 NOTE: Unless otherwise explicitly stated in the procedure, the correction code and FRT listed above reflect all of the work required to perform this procedure, including the linked procedures. Do not stack correction codes unless explicitly told to do so. NOTE: See Flat Rate Times to learn more about FRTs and how they are created. NOTE: See Personal Protection to make sure you are wearing proper PPE when performing the procedure below. NOTE: See Ergonomic Precautions for safe and healthy working practices.

  • 2024-05-13: Corrected psi value to 261 psi (18 bar).
Equipment:
  • Air Suspension Nitrogen Filling kit - 1083876-00-A
  • Nitrogen Fill Tank Adapter - 2006999-00-A
  • For EMEA:NITROGEN REFILL KIT FR/ESP/IT - 1028154-03-A

Deflate All

  1. Raise and support the vehicle on a 2 post lift. See .Raise Vehicle - 2 Post Lift.
  2. Open the LH front door and lower the LH front window.
  3. Put the vehicle in Service Mode. See Service Mode.
  4. Unlock the vehicle gateway. See Gateway (Unlock).
  5. Deflate the TAS system through the vehicle touchscreen.
    Note
    Touch Service > Chassis > Suspension > Service > Deflate All, and then touch Run. Close it once the routine passed.
  6. Return to the procedure that required the air suspension system to be deflated.

Refill the Reservoir

Warning
Wear eye protection while performing this procedure.
Warning
Make sure the Nitrogen refill kit is working correctly. Faulty gauges or other equipment may cause damage or personal injury.
CAUTION
Use the Nitrogen refill kit to refill the air suspension reservoir. Do not use shop air, which might contain contaminants that could damage the air suspension system.
  1. Remove the RH rear fender flare. See Fender Flare - Rear - RH (Remove and Install).
  2. Remove the RH rear fender flare carrier. See Carrier - Fender Flare - Aft - Rear - RH (Remove and Install).
  3. Set up nitrogen tank kit to fill the air reservoir.
    Note
    Verify valves are set to closed position on the tank, the regulator, and the air line.
  4. Connect the nitrogen tank hose onto the air reservoir fill port.
  5. Open the valve on the nitrogen tank, and then set pressure using the regulator.
    Note
    Slowly open valve and adjust the regulator. Verify the pressure is set to 18 bar (261 psi).
  6. Open the valve on the nitrogen tank hose.
  7. Verify that pressure holds on the regulator valve gauge.
    Note
    18 bar (261 psi)
    Note
    If the pressure does not hold, there may be a leak present.
  8. Close the valve on the nitrogen tank hose.
  9. Close the valve on the nitrogen tank.
  10. Close the pressure regulator valve on the nitrogen tank to release pressure in lines.
  11. Disconnect the nitrogen tank hose from the air reservoir fill port.
  12. Install the RH rear fender flare carrier. See Carrier - Fender Flare - Aft - Rear - RH (Remove and Install).
  13. Install the RH rear fender flare. See Fender Flare - Rear - RH (Remove and Install).
  14. Put the vehicle in TAS normal mode using the vehicle touchscreen.
    Note
    Touch Service > Chassis > Suspension > Normal.
  15. Remove the vehicle from the lift. See Raise Vehicle - 2 Post Lift.
  16. Verify the operation of the air suspension.
    Note
    Cycle the ride height through the vehicle touchscreen: Controls > Suspension > Low to Very High.
    Note
    All doors must be closed to allow ride height to cycle.
    Note
    Set the air suspension back to ''Standard'' after verification.
  17. Exit Service Mode. See Service Mode.
  18. Raise the LH front window and close the LH front door.