19/08/2024 05:24:02

Air Suspension - Pressurize/Depressurize - Full System

Correction Code 31101500

  • 2023-09-28: Added steps to enable and disable TAS service mode for deflation.
  • 2023-07-17: Updated procedure and Toolbox 3 routines.

Depressurize

  1. Position the vehicle on a 2-post lift, but do not raise the vehicle at this time.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Set the suspension to "High" or "Very High" to allow the vehicle to be positioned and supported correctly on a vehicle lift.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    Activate "Jack" mode on the touchscreen before raising and supporting the vehicle.
  2. Raise and support the vehicle sufficiently to unload the suspension. See Raise Vehicle - 2 Post Lift.
  3. To depressurize the system: using Service Mode, proceed to step 10. To depressurize the system using Toolbox 3, perform the following steps:
    • Using Service Mode - Proceed to step 10.
    • Using Toolbox 3 - Perform the following steps.
  4. Connect a laptop to the diagnostic port of the vehicle, and then use Toolbox 3 to locally connect to the vehicle. See Toolbox 3 (Connect and Disconnect).
  5. Unlock the vehicle gateway for diagnostic communication. See Gateway Unlock.
  6. In Toolbox, click the Actions tab, type "TAS service mode" into the search field, click PROC_TAS_X_ENTER-SERVICE-MODESearch for routine in ToolboxTAS Enter Service Run Mode, click RUN, and allow the routine to complete.
  7. Click the Actions tab, type "TAS deflate component" into the search field, click PROC_TAS_X_DEFLATESearch for routine in ToolboxTAS Deflate ComponentChassis ➜ Suspension ➜ Deflate, select ALL from the drop down menu, click RUN, and allow the routine to complete.
  8. Click the Actions tab, type "TAS service mode" into the search field, click PROC_TAS_X_ENTER-NORMAL-MODESearch for routine in ToolboxTAS Enter Normal Run Mode, click RUN, and allow the routine to complete.
  9. The procedure is complete.
  10. Enable Service Mode through the touchscreen. See Service Mode.
  11. Unlock the vehicle gateway for diagnostic communication. See Gateway Unlock.
  12. On the vehicle touchscreen, touch Service Mode (spanner icon).
  13. Touch Chassis (damper icon) and then touch Suspension.
  14. Touch Service, and then touch Deflate All.

Nitrogen Refill

Special tools required for this procedure:

Part Number Description
1083876-00-A Air suspension Nitrogen filling kit (Americas, APAC)
1028154-01-A Nitrogen Refill kit (EMEA, except UK)
1028154-02-A Nitrogen Refill kit (UK only)
Warning IconA warning icon, calling your attention to a possibly risky situation
Warning
Wear eye protection while performing this procedure.
Warning IconA warning icon, calling your attention to a possibly risky situation
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.
Table 1. Nitrogen Refill Kits
Portable Nitrogen Refill Kit With T-Handle Coupler Shop Nitrogen Refill Kit With Black-Handle Coupler






Vehicle Preparation

  1. Complete any air suspension component replacement procedures.
    Informational PurposesAn informational icon, calling your attention
    Note
    If any replacement procedures required disconnecting 12V power, reconnect 12V power.
  2. Position the vehicle on a 2-post lift, but do not raise the vehicle at this time.
  3. Connect a laptop to the diagnostic port of the vehicle, and then use Toolbox 3 to locally connect to the vehicle. See Toolbox 3 (Connect and Disconnect).
  4. Unlock the vehicle gateway for diagnostic communication. See Gateway Unlock.
  5. Raise and support the vehicle sufficiently to unload the suspension. See Raise Vehicle - 2 Post Lift.
  6. If the fill point is not accessible, remove the RH front wheel arch liner to access the fill point. SeeWheel Arch Liner - Front - LH (Remove and Replace).
  7. Release the compressor from the compressor bracket.
  8. Use a crowfoot extension to release the compressor line (purple) from the compressor.
    Informational PurposesAn informational icon, calling your attention
    Note
    The line remains connected to the valve block.
  9. Connect the VOSS fitting of the compressor line to the Nitrogen fill adapter (torque 3.5 Nm


Nitrogen Fill Kit Attachment

  1. Turn the Nitrogen cylinder main valve fully clockwise to closed.
  2. Turn the red knob on the regulator fully clockwise to closed.
  3. Attach the Schrader valve coupler quick-disconnect adapter to the Nitrogen cylinder quick-disconnect. There are two types of adapters:
    • Portable Nitrogen fill kit uses an adapter with a T-handle coupler, a hose, a pressure gauge, and a red knob.
    • Shop Nitrogen fill kit uses an adapter with a short valve body and a black handle.


  4. Prepare the Schrader valve coupler:
    • T-handle coupler: Turn the red valve fully clockwise to close. Turn the T-handle fully counter-clockwise.
    • Black-handle coupler: Turn the black handle perpendicular to the valve body to close.
  5. Open the main valve on the Nitrogen cylinder by one turn counter-clockwise.
  6. Make sure that the cylinder pressure gauge displays 500 to 1500 psi.


    • If the cylinder pressure is too low: Refill the cylinder or use a different cylinder.
    • If the cylinder pressure is too high: Report this situation to your shop safety manager immediately.
  7. Pressurize the air suspension system using Toolbox 3 (next step) or Service Mode (skip to step 9).
  8. Skip to step #TASK_MP5_VTV_CZ__GUID-FF9E9274-A4EE-491B-AD7B-10E4C5B6618C.
  9. On the vehicle touchscreen, touch Service Mode (spanner icon).
  10. Touch Chassis (damper icon) and then touch Suspension.
  11. Touch Normal.
    Informational PurposesAn informational icon, calling your attention
    Note
    Any deflated dampers will automatically inflate
  12. Connect a laptop to the diagnostic port of the vehicle, and then use Toolbox 3 to locally connect to the vehicle. See Toolbox 3 (Connect and Disconnect).
  13. Unlock the vehicle gateway for diagnostic communication. See Gateway Unlock.
  14. Connect the Nitrogen fill kit to the Schrader valve adapter.
    Informational PurposesAn informational icon, calling your attention
    Note
    Make sure that red knob on the regulator is fully closed.
    Informational PurposesAn informational icon, calling your attention
    Note
    Make sure that the vehicle's wheels do no touch the ground.
  15. Turn the black handle on the short valve body to the open position.
  16. Slowly open the pressure regulator valve on the Nitrogen tank and adjust the pressure to 19-21 bar (275 - 305 psi).
  17. Using Toolbox 3:
    1. Select the Actions tab and search for "TAS assisted inflate component".
    2. Select the ODIN routine PROC_TAS_X_ASSISTED-INFLATESearch for routine in ToolboxTAS Assisted Inflate ComponentChassis ➜ Suspension ➜ Inflate, and then click the link of the routine.
    3. Select RESERVOIR from the menu.
    4. Click RUN, and allow the routine to complete.
    5. Adjust the pressure on the Nitrogen tank pressure regulator as necessary.
  18. If the pressure on the regulator:
    • Holds steady - Close the valve on the air line, and then go to step 20.
    • Begins to drop - Close the valve on the air line, and then continue to the next step.
      Informational PurposesAn informational icon, calling your attention
      Note
      A leak has been detected.
  19. If the pressure on the regulator:
    • Continues to drop - There is a leak between the nitrogen tank valve and the air line valve. Go to step 20.
    • Stops and remains stable - There is a leak in the vehicle air suspension system. Investigate where.
  20. Turn the red knob of the regulator to the off position.
  21. Turn off the Nitrogen supply on the cylinder.
  22. Disconnect the Nitrogen fill kit from the Schrader valve adapter.
  23. Remove the Schrader valve adapter from the vehicle.
  24. Install a new VOSS fitting into the compressor.
      1. Release the VOSS fitting of the compressor line (purple) from the Nitrogen fill adapter.
      2. Use a flat blade screwdriver to snap off the old collet, and discard the collet and nut (VOSS fitting).


      3. Install New VOSS fitting to the air compressor (torque 3.5 Nm)
        Informational PurposesAn informational icon, calling your attention
        Note
        A plastic plug holds the fitting together before and during installation.


      4. Remove the plastic plug from the new fitting.
      5. Insert the air compressor line (purple) fully into the fitting, and then lightly pull on the line to make sure that it is secure.
      6. Position compressor onto the compressor bracket, and then tighten the nuts that secure the compressor to the bracket (torque 5 Nm).
      7. Install the front RH wheel arch liner and RH front wheel. Wheel Arch Liner - Front - LH (Remove and Replace).
  25. Lower the vehicle. See Raise Vehicle - 2 Post Lift.
  26. Using Toolbox 3:
    1. Select the Actions tab and search for "TAS service mode".
    2. Select the ODIN routine PROC_TAS_X_ENTER-NORMAL-MODESearch for routine in ToolboxTAS Enter Normal Run Mode, and then click the link of the routine.
    3. Click RUN, and allow the routine to complete.
  27. On the touchscreen, turn off "Jack" mode.
  28. Sit in the driver or front passenger seat, close all doors, and confirm that the vehicle moves appropriately as the suspension height is adjusted through the touchscreen.