Tesla Model 3 Owners & Service Manuals

Tesla Model 3: Inverter - Rear Drive Unit - Install

Install

  1. Secure the ESD strap to the replacement inverter housing.

  Inverter - Rear Drive Unit - Install

  1. Inspect the condition of the gap pad on the inverter PCB. Replace the gap pad if it does not fulfill these criteria.
  • New and undamaged condition.
  • Fully covers the discharge resistor array and that no resistors are visible.
  • Clean and free of debris.
  • Evenly adhered to the inverter PCB.
  1. Install a new inverter gasket.
  2. Use an IPA wipe to clean the HV mating surfaces of the motor and inverter 3-phase terminals.
  3. Carefully align the inverter to the 2 pins in the rear drive unit, and then install the inverter to the rear drive unit. Make sure that the 3-phase terminals align during installation.

 Caution: Avoid damage to the printed circuit board of the inverter.

  Inverter - Rear Drive Unit - Install

  1. Hand-tighten the new bolts (x12) that attach the inverter to the gearbox assembly.

  Inverter - Rear Drive Unit - Install

  1. Torque the bolts in the sequence shown. Torque 5 Nm +20 deg

  Inverter - Rear Drive Unit - Install

  1. Install the new bolts (x3) that attach the 3 phase cable to the inverter assembly.
  1. Tighten the bolts to this specification. Torque 11.5 Nm
  2. Loosen the bolts 180 degrees.
  3. Tighten the bolts to this specification. Torque 5 Nm +40 deg

  Inverter - Rear Drive Unit - Install

  1. Apply a film of ATF-9 fluid to the walls of the gear case bores, and then install the new 3-phase access cover.

  Inverter - Rear Drive Unit - Install

  1. Install the bolts (x2) that attach the 3-phase access cover to the rear drive unit assembly. Torque 7.5 Nm
  2. Perform an inverter air leak test. See Inverter Air Leak Test.

  Inverter - Rear Drive Unit - Install

  1. Apply a new 3-phase access label.
  2. Remove the ESD wrist strap.
  3. Fully raise the handle on the rear drive unit HV electrical harness.

  Inverter - Rear Drive Unit - Install

  1. Attach the HV connector lever lock onto the back of the HV electrical harness.
  2. Firmly connect the HV electrical harness to the inverter connector.

 Caution: Make sure that the harness fits the connector squarely and tightly.

  1. While pressing the harness to the connector, remove the HV connector lever lock.

  Inverter - Rear Drive Unit - Install

  1. While pressing the harness to the connector, fully lower the handle.

  Inverter - Rear Drive Unit - Install

  1. Slide the release to lock the HV electrical harness.

  Inverter - Rear Drive Unit - Install

  1. Install the bolt that attaches the HV harness bracket to the inverter. Torque 6 Nm

  Inverter - Rear Drive Unit - Install

  1. Connect the rear drive unit inlet hose to the inverter coolant inlet, and then fasten the clip.

 Caution: Perform a push-pull test to verify that the hose is fully seated.

  Inverter - Rear Drive Unit - Install

  1. Fasten the clip that attaches the rear drive unit inlet hose to the HV harness bracket.

  Inverter - Rear Drive Unit - Install

  1. Connect the electrical harness to the inverter low voltage connector.
  2. Install the LH rear drive unit mount. See Mount - Rear Drive Unit - LH (Remove and Replace).

  Inverter - Rear Drive Unit - Install

  1. Fasten the clips that attach the upper cooler hose to the rear drive unit.
  2. Install the rear subframe assembly. See Subframe Assembly - Rear (Remove and Install).
  3. Refill the cooling system. See Powertrain Coolant (Drain and Refill). Note: Perform the refill before the installation of the front RH wheel liner.
  4. Within Toolbox, return to the Rear Drive Inverter - Remove and Replace Autodiag, and run PROC_PM_X_RESTORE-DATA-BOOT to restore the bootloader data and run PROC_PM_X_WRITE-DRIVE-TYPE to configure the Usage ID.
  5. Use the Rear Drive Inverter - Remove and Replace Autodiag to:
  1. Redeploy the current firmware to the new inverter.
  2. Restore the required data to the new inverter.
  3. Perform the resolver learn process.  Caution: This process requires the vehicle wheels to be spinning at 55 mph (90 kph) while elevated on a lift.
  4. Perform the thermal performance self-test.
  1. Perform a four wheel alignment. See Four Wheel Alignment (Check and Adjust).

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