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Home >> Tesla >> 2021 >> Model Y Performance >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Electric Motor Systems >> Front Drive Unit -- Model Y >> Front Drive Inverter >> Inverter - Front Drive Unit - Remove And Replace >> Remove

Inverter - Front Drive Unit - Remove And Replace: Remove

  1. While performing the courtesy inspection, note any abnormal tire wear that could indicate the need for an alignment.
  2. Move the vehicle to a 2 post lift. See RAISE VEHICLE - 2 POST LIFT .
  3. Place stanchions around the rear of the vehicle to setup a safety perimeter.
    G14844392Courtesy of TESLA, INC.
  4. Verify that the vehicle firmware is version 2022.20.6 or later. Update the vehicle firmware if this is not the case. See Software Update .
  5. Connect a laptop with Toolbox 3 to the vehicle. See INVERTER - Front Drive Unit (Remove And Replace) 
  6. In Toolbox 3, click the Dashboards  tab, and type 'Front Drive Inverter Replacement' into the search field.
  7. Click FRONT Drive INVERTER - Replacement  , from the BEFORE INVERTER SWAP Action List, click Store Drive Inverter Slave Bootloader Data before Replacement  , click Run  , and then allow the routine to complete.
  8. From the BEFORE INVERTER SWAP Action List, click Store Drive Inverter Slave Application Data before Replacement  , click Run  , and then allow the routine to complete.
  9. From the BEFORE INVERTER SWAP Action List, click Start Thermal Fluid Fill/Drain (Coolant only)  , click Run  , and then allow the routine to complete.
  10. Disconnect the laptop with Toolbox 3 from the vehicle. See INVERTER - Front Drive Unit (Remove And Replace) 
    NOTE: Do not close this instance of Toolbox 3 as it is needed later on in the procedure.
  11. Use a steering wheel lock to firmly set the steering wheel in the straight forward position.
    G14844393Courtesy of TESLA, INC.
  12. Disconnect LV power. See 12V/LV Power (Disconnect and Connect) .
  13. Perform the vehicle electrical isolation procedure. See Vehicle Electrical Isolation Procedure .
  14. Remove the underhood storage unit. See Underhood Storage Unit (Remove and Replace) .
  15. Remove the bolt that attaches the intermediate shaft to the steering gear, and then slide the intermediate shaft upwards to remove it from the steering gear.

    Figure 1.

    G14844394Courtesy of TESLA, INC.
    G14844395Courtesy of TESLA, INC.
  16. Slide the red tab to unlock, press the connector release, and then disconnect the electrical harness from the steering gear power connectors (x2).
    G14844396Courtesy of TESLA, INC.
  17. Remove the front LH and RH fender garnishes. GARNISH - FENDER - FRONT - LH (REMOVE AND REPLACE) .
  18. Remove the front LH and RH wheels. See Wheel (Remove and Install) .
  19. Remove the front aero shield panel. See Panel - Aero Shield - Front (Non-Structural Pack) - Remove And Replace .
  20. Remove the front fascia. See FASCIA - FRONT (REMOVE AND INSTALL) .
  21. Remove the front subframe. See Subframe Assembly - Front (Dual Motor) (Remove and Install) .
  22. Move a coolant catcher under the front subframe and fixture assembly.
    G14844397Courtesy of TESLA, INC.
  23. Release the clip, disconnect the front drive unit inverter to heat exchanger hose from the front drive unit inverter outlet, plug the inverter fitting, and then allow the hose to drain.
    NOTE: Use a foldable funnel to direct flow.

    Figure 2.

    G14844398Courtesy of TESLA, INC.
  24. Release the clip, disconnect the front drive unit inverter to heat exchanger hose from the front drive unit heat exchanger, plug the heat exchanger fitting, and then allow the hose to drain.
    NOTE: Use a foldable funnel to direct flow.

    Figure 3.

    G14844399Courtesy of TESLA, INC.
  25. Release the clips (x2) that attach the front drive unit inverter to heat exchanger hose to the front drive unit, and then remove the hose from the front drive unit.

    Figure 4.

    G14844400Courtesy of TESLA, INC.
  26. Release the clip, disconnect the front drive unit inverter inlet hose from the front drive unit inverter inlet, plug the inverter fitting, and then allow the hose to drain.
    NOTE: Use a foldable funnel to direct flow.
    G14844401Courtesy of TESLA, INC.
  27. Release the clips (x2) that attach the front drive unit inverter inlet hose to the front drive unit, and then remove the hose from the drive unit.
    G14844402Courtesy of TESLA, INC.
  28. Release the locking tab, push the handle downward, and then disconnect the subframe electrical harness from the front drive unit inverter logic connector.
    G14844403Courtesy of TESLA, INC.
  29. Release the clips (x2) that attach the subframe electrical harness to the inverter.
    G14844404Courtesy of TESLA, INC.
  30. Remove the bolts (x3) that attach the LH motor mount to the front drive unit, and then remove the mount from the drive unit.
    G14844405Courtesy of TESLA, INC.
  31. Attach an Electrostatic Discharge (ESD) wrist strap to the front drive unit inverter housing.
    G14844406Courtesy of TESLA, INC.
  32. Remove and discard the front drive unit phase out cover label.
    G14844407Courtesy of TESLA, INC.
  33. Remove the bolts (x2) that attach the phase out cover to the front drive unit gearbox, and then use a plastic trim tool to remove the cover from the gearbox.
    G14844408Courtesy of TESLA, INC.
  34. Inspect the condition of the phase out cover and O-rings. If the cover has less than 6 O-rings, or if the O-rings or cover are damaged, discard the cover and use a new cover, part 1096984-00-C or newer revision, for installation.
    G14844409Courtesy of TESLA, INC.
  35. Remove the bolts (x3) that attach the front drive unit motor 3-phase terminals to the front drive unit inverter 3-phase terminals.
    G14844410Courtesy of TESLA, INC.
  36. Remove the bolts (x12) that attach the front drive unit inverter to the front drive unit gearbox.
    G14844411Courtesy of TESLA, INC.
  37. Carefully remove the inverter assembly from the front drive unit, remove the plugs, and allow the coolant to drain.
    G14844412Courtesy of TESLA, INC.
  38. Place the removed front drive unit inverter onto an ESD mat, and then remove the ESD wrist strap from the inverter.
  39. Inspect the front drive unit gearbox housing to make sure that there is no gap pad stuck there. If there is, remove the gap pad, clean the area with an alcohol wipe, and allow at least one minute to dry.
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