Tesla Model 3: Inverter - Rear Drive Unit - Install
Install
- Secure the ESD strap to the replacement inverter
housing.
- 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.
- Install a new inverter gasket.
- Use an IPA wipe to clean the HV mating surfaces of
the motor and inverter 3-phase terminals.
- 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.
- Hand-tighten the new bolts (x12) that attach the
inverter to the gearbox assembly.
- Torque the bolts in the sequence shown.
Torque 5 Nm +20 deg
- Install the new bolts (x3) that attach the 3 phase
cable to the inverter assembly.
- Tighten the bolts to this specification.
Torque 11.5 Nm
- Loosen the bolts 180 degrees.
- Tighten the bolts to this specification.
Torque 5 Nm +40 deg
- Apply a film of ATF-9 fluid to the walls of the gear
case bores, and then install the new 3-phase access
cover.
- Install the bolts (x2) that attach the 3-phase
access cover to the rear drive unit assembly.
Torque 7.5 Nm
- Perform an inverter air leak test. See Inverter Air
Leak Test.
- Apply a new 3-phase access label.
- Remove the ESD wrist strap.
- Fully raise the handle on the rear drive unit HV
electrical harness.
- Attach the HV connector lever lock onto the back of
the HV electrical harness.
- Firmly connect the HV electrical harness to the
inverter connector.
Caution:
Make sure that the harness fits the connector
squarely and tightly.
- While pressing the harness to the connector, remove
the HV connector lever lock.
- While pressing the harness to the connector, fully
lower the handle.
- Slide the release to lock the HV electrical harness.
- Install the bolt that attaches the HV harness
bracket to the inverter.
Torque 6 Nm
- 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.
- Fasten the clip that attaches the rear drive unit
inlet hose to the HV harness bracket.
- Connect the electrical harness to the inverter low
voltage connector.
- Install the LH rear drive unit mount. See Mount -
Rear Drive Unit - LH (Remove and Replace).
- Fasten the clips that attach the upper cooler hose
to the rear drive unit.
- Install the rear subframe assembly. See Subframe
Assembly - Rear (Remove and Install).
- Refill the cooling system. See Powertrain Coolant
(Drain and Refill).
Note: Perform the refill before the installation
of the front RH wheel liner.
- 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.
- Use the Rear Drive Inverter - Remove and Replace
Autodiag to:
- Redeploy the current firmware to the new
inverter.
- Restore the required data to the new inverter.
- 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.
- Perform the thermal performance self-test.
- Perform a four wheel alignment. See Four Wheel
Alignment (Check and Adjust).
READ NEXT:
SPECIAL TOOLS
Drive Unit Pressure Test Fixture (1053600-00-C)
Kit, Coolant Leak Test Adapters, Model 3
(1132
Refill
Remove the plugs from the hoses.
SEE MORE:
Remove the driver airbag. See Airbag - Driver (Remove and Replace).
Disconnect the steering wheel electrical wiring harness from the
connector.
Disconnect the electrical harness from the LH steering wheel switch
connector.
Disconnect the electrical harness from the RH steering
Remove
Open all doors and lower all windows
Remove the 2nd row lower seat cushion. See
Seat Cushion - Lower - 2nd Row (Remove and Replace).
Move the driver seat and front passenger seat fully rearward.
Disconnect 12V power. See
12V Power (Disconnect and Connect).
Open the armrest.
Remove