07/03/2024 16:48:49

Four Wheel Alignment Check (Air Suspension)

Correction Code 31002100

  • 2023-07-19: Removed unnecessary steps.
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Note
This procedure is not specific to a particular alignment rack. Follow the alignment equipment manufacturer's instructions for additional information and safety instructions.
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Note
This procedure is for vehicles equipped with air suspension. For vehicles equipped with coil suspension. see Four Wheel Alignment Check (Coil Suspension).
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Note
This procedure assumes the vehicle suspension is operating as intended. If needed, a vehicle general inspection can be performed.
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Note
Make sure the vehicle profiles on the alignment machine match the alignment specifications in the Service Manual. If alignment specifications do not match, they may need to be manually entered; refer to the alignment machine's instructions for additional information.

Preparation

  1. Ensure that the following are within Tesla-approved specifications before continuing to the next step of this procedure:
    • Wheel offset
    • Tire size (refer to the tire and loading information label)
    • Tire wear
    • Tire pressure
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Do not perform this procedure on a vehicle that has non-OEM wheels, incorrect wheel offset, tire(s) with less than 4/32 in (3 mm) tread, or incorrect tire pressure.
  2. 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).
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    Note
    Use an extension cable so that the laptop can be accessed from outside of the vehicle during this procedure.
  3. If the fasteners that secure the steering rack, steering column, intermediate shaft, tie rods, or front subframe have been loosened or removed, perform a Lock To Lock-Angle test. See Lock To Lock-Angle Test.
  4. Turn off the vehicle climate control system.
  5. Ensure that all pins are inserted into the slip plates and turn plates of the alignment rack.
  6. Set the suspension to “Medium".
  7. Drive onto the alignment rack, and stop the vehicle 1-2 ft (300-600 mm) before the turn plates so that the rolling compensation can be performed in a later step.
  8. Shift into Park.
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    Note
    Do not change the suspension height yet.
  9. Prepare the touchscreen to display steering angle.
    1. Enable Service Mode +. See Service Mode Plus.
    2. On the vehicle touchscreen, touch CAN Viewer > CH > STW_ANGLHP_STAT > StW_AnglHP.
    3. If the check value = 0, steering wheel centered
    4. Center the steering wheel, and then install the steering wheel holder. Make sure that the front road wheels are in a straight ahead position.
  10. Exit the vehicle with the laptop still connected to Toolbox.
  11. Place the laptop on a cart or other surface that is a safe distance from the alignment rack.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Placing the laptop on the alignment rack can result in damage in later steps.
  12. Place chocks on both sides of the driver's side rear tire.
  13. Complete the steps below to make sure that the drive rail stays on for the remainder of this procedure:
    1. Enter the vehicle.
    2. Buckle the driver’s seatbelt.
    3. Shift into Neutral.
    4. Use a pen or screwdriver shaft to manually close the latch assembly on the driver’s door while it is open.
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      Note
      The latch is fully closed when it clicks twice.
    5. Put the vehicle in Jack Mode. See Jack Mode Activation.
  14. If new suspension components were installed on the vehicle, make sure all related fasteners are torqued to specification.

Alignment Check

  1. Raise the alignment platform until it is clear of all 4 rack locks.
  2. Lower the alignment platform onto the rack locks and ensure that it is level.
  3. Secure all 4 alignment optical targets.
  4. Perform the rolling compensation.
  5. Remove the pins from the slip plates and turn plates.
  6. Unlock the vehicle gateway for diagnostic communication. See Gateway Unlock.
  7. Install the brake pedal depressor.
  8. Perform a caster sweep without sitting inside or leaning on the vehicle.
  9. Turn the steering wheel so that the steering wheel angle displayed on the touchscreen is 0.0 degrees, and then install the steering wheel holder.
  10. Print the vehicle alignment summary and verify that the alignment parameters are within specifications.
  11. If the parameters are not within specifications, discontinue this procedure and perform the four wheel alignment check and adjust procedure. See Four Wheel Alignment Check and Adjust (Air Suspension).
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    Note
    Add the adjustment to the Repair Order/Service Visit as an additional line item/activity.
  12. Transfer the PDF of the alignment results from the alignment machine and attach it to the Repair Order/Service Visit.
  13. Remove the brake pedal depressor.
  14. Reinstall all slip plate pins and turn plate pins.
    Tip: Install the forward slip plate pins before installing the rearward slip plate pins.
  15. Remove all 4 alignment optical targets.
  16. Enter the vehicle.
  17. Press the brake pedal and shift into Park.
  18. Remove the wheel chocks.
  19. Remove the vehicle from the alignment rack.