Removal [12/2023 - ]: Procedure

NOTE: The resolver learned values cannot be initialized by disconnecting the cable from the negative (-) auxiliary battery terminal or removing a fuse. If resolver learning is not performed after the part related has been replaced, the following DTCs may be stored and the symptoms may occur: DTC output P1C5E19 (Drive Motor "B" Inverter Circuit Current Above Threshold) P0C021D (Drive Motor "B" System Circuit Current Out of Range) P0C1A00 (Drive Motor "B" Execution Torque Performance) Slight vibration at a vehicle speed of 5 km/h (3 mph) or less Shock and vibration during acceleration HINT:  After replacing the EV motor control inverter assembly, write the stored resolver compensation value. If the "read compensation value" cannot be performed, the resolver compensation value on the QR code label of the rear transaxle with motor and inverter assembly will need to be checked.

1. Store resolver compensation value (if the "read compensation value" can be performed)
   1. Turn the ignition switch off and wait for 2 minutes or more.
   2. Check that the air conditioning system and power outlet socket are turned off.
   3. Enter the following menus.

      Powertrain > Rear Motor Generator > Utility 

      Tester Display
      Rear Resolver Correction Value Registration

   4. Select "Save Correction Value" and read the resolver compensation value.
   5. Turn the ignition switch off.
2. Check resolver compensation value on QR code label (if the "read compensation value" cannot be performed)
   1. Check the resolver compensation value on the QR code label of the rear transaxle with motor and inverter assembly.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      *a	QR Code Label
      *b	Resolver Compensation Value

Refer to REMOVAL [12/2023 - ] 

See step  8

See step  9

See step  10

WARNING: Be sure to wear insulated gloves. NOTE: Do not allow any foreign matter or water to enter the rear transaxle with motor and inverter assembly.

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Voltage Measurement Position

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   1. Using a voltmeter, measure the voltage between the high voltage cable connector terminals.

      Standard Voltage

      0 V

      HINT: 

      • Use measuring range of DC 750 V or more on the voltmeter.
      • If it is confirmed that high-voltage is not being applied to the rear transaxle with motor and inverter assembly, the following procedures can be performed without using insulated tools or gloves.
   2. Apply protective tape to the area that was exposed.
      NOTE:

      Use non-residue type tape.

NOTE: To prevent foreign matter from entering the rear transaxle with motor and inverter assembly, make sure that the protective tape is not partially removed.

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Using a piece of cloth, clean the outside of the rear transaxle with motor and inverter assembly and around the bolts.

NOTE: Static electricity should be eliminated when removing/installing the rear transaxle with motor and inverter assembly. Do not touch the electronic components of a circuit board. Keep clothes away from electronic components. Place the rear transaxle with motor and inverter assembly and any removed electronic components on SST (antistatic mat).

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Wear SST (antistatic wrist strap).
      • SST: 09890-47010 
   2. Connect the ground clip of SST (antistatic mat) securely to a ground point provided in the workshop or on a workbench (anchor bolt).
      • SST: 09890-47010 

      HINT: 

      If the ground clip cable is too short, use an extension cable.

   3. Connect the ground clip of SST (antistatic wrist strap) securely to the specified point of SST (antistatic mat).
   4. When handling internal components of the rear transaxle with motor and inverter assembly, use only antistatic gloves or bare hands to prevent damage from static electricity or the entry of foreign matter.

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Place the rear transaxle with motor and inverter assembly as shown in the illustration.
   2. Connect the ground clip of SST (antistatic wrist strap) securely to the rear transaxle with motor and inverter assembly.
      • SST: 09890-47010 
   3. Remove the 2 caps from the coolant pipes and drain the coolant (for intercooler) from the rear transaxle with motor and inverter assembly.

2. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Blow compressed air into the rear transaxle with motor and inverter assembly until almost all of the coolant (for intercooler) is blown out.
      NOTE:

      • Do not damage the coolant pipes.
      • Apply compressed air to the black colored coolant pipe.
   2. Use a piece of cloth as shown in the illustration to prevent the coolant (for intercooler) from spraying.
   3. Cover the air inlet port with a piece of cloth to minimize air leakage.
   4. Install the 2 caps to the coolant pipes.

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Using a T30 "TORX" socket wrench, remove the 15 bolts.

2. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Correct

   Incorrect

   1. Using a screwdriver with its tip wrapped with protective tape, remove the inverter cover from the rear transaxle with motor and inverter assembly.
      NOTE:

      • Do not damage the sealing surfaces of the rear transaxle with motor and inverter assembly.
      • Do not touch or allow grease or oil to contact the sealing surfaces of the rear transaxle with motor and inverter assembly.
      • To prevent internal components of the rear transaxle with motor and inverter assembly from being damaged, do not insert the screwdriver excessively.
      • Do not remove seal packing from the sealing surface.

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      • Remove any seal packing that protrudes from the sealing surface.

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Push the lock at the bottom of the connector upward and disconnect the 2 connectors.

2. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Using a T30 "TORX" socket wrench, remove the 2 bolts and rear transaxle motor compartment wire.

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Using a T30 "TORX" socket wrench, remove the 4 bolts and 2 rear transaxle inverter cooling pipes.

2. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Apply protective tape to the opening.
      NOTE:

      Use non-residue type tape.

NOTE: Do not touch the circuit board. Do not allow any foreign matter or water to enter the EV motor control inverter assembly.

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Using a T30 "TORX" socket wrench, remove the 3 bolts.

2. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Using a T30 "TORX" socket wrench, remove the 8 bolts.

3. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Hold here

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   -

   1. Hold the corners of the EV motor control inverter assembly and remove it as shown in the illustration.
      NOTE:

      Place the EV motor control inverter assembly on a flat surface.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Area that can Touch the Ground

4. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Bolt Contacting Surface

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   -

   1. Remove any metal shavings from the areas around the bolt holes where bolts were installed to separate the EV motor control inverter assembly, using tape or equivalent.