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Home >> Tesla >> 2021 >> Model S Long Range Plus >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Electric Motor Systems >> Front Drive Unit -- Model S >> Front Inverter >> Fluid Coupling (55 Degrees) - Front Drive Unit - Remove And Replace >> Install

Fluid Coupling (55 Degrees) - Front Drive Unit - Remove And Replace: Install

  1. Wet the 55 degrees fluid coupling O-ring with coolant, install the fluid coupling into the front drive unit inverter, and then install a new bolt to attach the coupling to the inverter.

    6 N.m (4.4 ft-lbs) 

    G15106481Courtesy of TESLA, INC.
  2. Remove the plugs from the fittings, immediately connect the front drive unit inverter to heat exchanger hose to the front drive unit inverter, fasten the clip, and then perform a Push-Pull-Push check of the fitting.
    G15106482Courtesy of TESLA, INC.
  3. Fasten the clip that attaches the electrical harness to the front drive unit inverter near the LV logic connector.
    G15106483Courtesy of TESLA, INC.
  4. Move the coolant drain container out from underneath the vehicle.
    G15106484Courtesy of TESLA, INC.
  5. Install the LH cross brace to the LH casting, and then install the bolts (x3) that attach the cross brace to the casting.

    30 N.m (22.1 ft-lbs) 

    G15106485Courtesy of TESLA, INC.
  6. Install the HV battery. See HV Battery (AWD) (Remove and Install) .
  7. Install the front skid plate. See Skidplate - Front (Remove and Replace) .
  8. Install the front aero shield panel. See Panel - Aero Shield - Front (Remove and Replace) .
  9. Verify that the black release lever of the rear drive unit HV harness connector is in the open position, install the connector flat and square to the HV battery LH HV header, secure the release lever to the closed position, and then slide the red connector locking tab.
    G15106486Courtesy of TESLA, INC.
  10. Install the LH and RH rear subframe shear plates. See Shear Plate - Rear Subframe - LH (Remove and Replace) .
  11. Install the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace) .
  12. Use an alcohol wipe to clean the charge port busbar connector lead contact surfaces of residual Penetrox, and allow at least one minute to dry.
    G15106487Courtesy of TESLA, INC.
  13. Use an alcohol wipe to clean the DC input HV header terminal contact surfaces of residual Penetrox, and allow at least one minute to dry.
    G15106488Courtesy of TESLA, INC.
  14. Apply two small drops of Penetrox onto each DC input HV header terminal contact surface, and spread evenly.
    G15106489Courtesy of TESLA, INC.
  15. Install the charge port busbar connector onto the DC input HV header, and then install the bolts (x2) that attach the connector to the header.

    9 N.m (6.6 ft-lbs) 

    G15106490Courtesy of TESLA, INC.
  16. Put on the HV insulating gloves and leather over gloves.
    G15106491Courtesy of TESLA, INC.
  17. Use the Hioki resistance meter to measure the resistance between the charge port busbar connector lead and the DC input HV header bolt head.
    NOTE: The acceptable resistance is between 0.050 mΩ (50 μΩ) and 0.195 mΩ (195 μΩ). If the measured resistance is above 0.195 mΩ (195 μΩ), escalate to Service Engineering.
    NOTE: If the resistance is lower than 0.050 mΩ (50 μΩ), reposition the probes and measure again. If after 4 attempts the resistance is consistently lower than 0.050 mΩ (50 μΩ), the test has passed; continue to the next step.
    G15106492Courtesy of TESLA, INC.
  18. Repeat step 42 in HV BATTERY (AWD) - REMOVE AND INSTALL for the other charge port busbar connector lead and DC input HV header bolt head.
  19. Remove the HV insulating gloves and leather over gloves.
    G15106493Courtesy of TESLA, INC.
  20. Install the bolt that secures the charge port busbar connector access door.

    9 N.m (6.6 ft-lbs) 

    G15106494Courtesy of TESLA, INC.
  21. Install the DC input HV header foam block.
    G15106495Courtesy of TESLA, INC.
  22. Install the 2nd row lower seat cushion. See Seat Cushion - Lower - 2nd Row (Remove and Replace) .
  23. Install the LH and RH 2nd row seat side bolsters. See Bolster - Outer - Seat - 2nd Row - LH (Remove and Replace) .
  24. Perform a cooling system vacuum refill. See Cooling System (Vacuum Refill) .
  25. Connect LV power. See LV Power (Disconnect and Connect) .
  26. Perform a cooling system air purge. See Cooling System (Partial Refill and Bleed) .
  27. Install the rear underhood apron. See Underhood Apron - Rear (Remove and Replace) .
  28. Install the LH and RH rocker panel moldings. See Molding - Rocker Panel - LH (Remove and Replace) .
  29. Install the LH and RH rocker panel scuff plates. See Scuff Plate - Rocker Panel - LH (Remove and Replace) .
  30. Remove the vehicle from the 2 post lift. See Raise Vehicle - 2 Post Lift .