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Home >> Lexus >> 2021 >> UX 250h Luxury >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Battery Control System (Service Information) (1 Of 2) >> Rear Inverter >> Installation [10/2018 - ] >> Procedure

Installation [10/2018 - ]: Procedure

  1. INSTALL HV INVERTER COOLING FAN 
    WARNING:

    Wear insulated gloves.

    HINT: 

    Perform this procedure only when replacement of the HV inverter cooling fan is necessary.

    1. Install the 3 collars to the bushes of the HV inverter cooling fan.

      HINT: 

      • Be sure to install the collar in the correct orientation.
        GTY799046Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *1 collar
        *a bush
      • If any of the bushes have come off, reinstall the bushes to the HV inverter cooling fan before installing the collars.
    2. Using a T20 "TORX" socket wrench, install the HV inverter cooling fan with 3 bolts..

      Torque: 1.5 N*m (15 kgf*cm, 13 in.*lbf) 

      HINT: 

      When replacing the installation bolts:

      • The shape of supply part bolts will differ.
      • The supply part bolts do not come with washers, so be sure to prepare washers when replacing them.
      • When tightening the supply bolts, use a plus socket wrench.
    3. Engage the 2 guides.
    4. Engage the clamp.
    5. Connect the hybrid motor control inverter assembly connector.
      GTY808219Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSTALL HV INVERTER COOLING COVER 
    WARNING:

    Wear insulated gloves.

    HINT: 

    Perform this procedure only when replacement of the HV inverter cooling fan is necessary.

    1. Using a T20 "TORX" socket wrench, install the HV inverter cooling cover with 4 bolts.

      Torque: 1.5 N*m (15 kgf*cm, 13 in.*lbf) 

      HINT: 

      When replacing the installation bolts:

      • The shape of supply part bolts will differ.
      • The supply part bolts do not come with washers, so be sure to prepare washers when replacing them.
      • When tightening the supply bolts, use a plus socket wrench.
  3. INSTALL REAR HYBRID MOTOR CONTROL INVERTER ASSEMBLY 
    WARNING:

    Wear insulated gloves.

    1. Temporarily install the rear hybrid motor control inverter assembly with 3 bolts.
      NOTE:
      • Do not damage the terminals, connector housing or rear hybrid motor control inverter assembly during disconnection.
      • Cover the hole where the cable was connected with tape (non-residue type) or equivalent to prevent entry of foreign matter.
      • Do not allow any foreign matter or water to enter the rear hybrid motor control inverter assembly.
      • Insulate the disconnected terminals with insulating tape.
      • To prevent damage due to staticelectricity, do not touch the terminals of the disconnected connectors.
    2. Fully tighten the 3 bolts as shown in the illustration.
      GTY776955Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 12 N*m (122 kgf*cm, 9 ft.*lbf) 

    3. Connect the 2 rear hybrid motor control inverter assembly connectors.
      NOTE:

      To prevent damage due to staticelectricity, do not touch the terminalsof the disconnected connectors.

  4. REMOVE INVERTER TERMINAL COVER 

    See step  6 See step  6

  5. CONNECT REAR TRACTION MOTOR CABLE 
    WARNING:

    Wear insulated gloves.

    NOTE:

    Do not allow any foreign matter or water to enter the rear hybrid motor control inverter assembly.

    1. Temporarily connect the rear traction motor cable with the 5 bolts.
      NOTE:
      • Cover the hole where the cable was connected with tape (non-residue type) or equivalent to prevent entry of foreign matter.
      • Do not allow any foreign matter or water to enter the rear hybrid motor control inverter assembly.
      • Insulate the disconnected terminals with insulating tape.
      • To prevent damage due to staticelectricity, do not touch the terminals of the disconnected connectors.
    2. Using an insulated tool, fully tighten 2 bolts (A).
      GTY787952Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Waterproof Seal

      Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) 

    3. Using an insulated tool, fully tighten 3 bolts (B).

      Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) 

  6. CONNECT HV BATTERY PACK WIRE 
    WARNING:

    Wear insulated gloves.

    NOTE:

    Do not allow any foreign matter or water to enter the rear hybrid motor control inverter assembly.

    1. Temporarily connect the HV battery pack wire with the 4 bolts..
      NOTE:
      • Cover the hole where the cable was connected with tape (non-residue type) or equivalent to prevent entry of foreign matter.
      • Do not allow any foreign matter or water to enter the rear hybrid motor control inverter assembly.
      • Insulate the disconnected terminals with insulating tape.
      • To prevent damage due to staticelectricity, do not touch the terminals of the disconnected connectors.
    2. Using an insulated tool, install 2 bolts (A).
      GTY813573Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Interlock
      *b Waterproof Seal

      Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) 

    3. Using an insulated tool, install 2 bolts (B).

      Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) 

  7. CONNECT FLOOR UNDER WIRE 
    WARNING:

    Wear insulated gloves.

    NOTE:

    Do not allow any foreign matter or water to enter the rear hybrid motor control inverter assembly.

    1. Temporarily connect the HV floor under wire with the 4 bolts.
      NOTE:
      • Cover the hole where the cable was connected with tape (non-residue type) or equivalent to prevent entry of foreign matter.
      • Do not allow any foreign matter or water to enter the inverter with converter assembly.
      • Insulate the disconnected terminals with insulating tape.
      • To prevent damage due to staticelectricity, do not touch the terminalsof the disconnected connectors.
    2. Using an insulated tool, fully tighten 2 bolts (A).
      GTY807261Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Waterproof Seal

      Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) 

    3. Using an insulated tool, fully tighten 2 bolts (B).

      Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) 

  8. INSTALL INVERTER TERMINAL COVER 
    WARNING:

    Wear insulated gloves.

    NOTE:

    Do not allow any foreign matter or water to enter the rear hybrid motor control inverter assembly.

    1. Temporarily the inverter terminal cover with the 5 bolts.
      NOTE:
      • Cover the hole where the cable was connected with tape (non-residue type) or equivalent to prevent entry of foreign matter.
      • Do not allow any foreign matter or water to enter the rear hybrid motor control inverter assembly.
      • Insulate the disconnected terminals with insulating tape.
      • To prevent damage due to staticelectricity, do not touch the terminals of the disconnected connectors.
    2. Using an insulated tool, fully tighten bolt (A).
      GTY833771Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Interlock
      *b Waterproof Seal

      Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) 

    3. Using an insulated tool, fully tighten 4 bolts (B).

      Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) 

  9. INSTALL LUGGAGE ROOM REAR COVER 
    1. Engage the guide to install the luggage room rear cover.
    2. Install the clip.
  10. INSTALL REAR DECK FLOOR BOX 

    Refer to PROCEDURE - Step 58 [10/2018 - 10/2020] Refer to PROCEDURE - Step 57 [10/2020 - 07/2022] Refer to PROCEDURE - Step 57 [07/2022 - ]

  11. INSTALL DECK BOARD ASSEMBLY 

    Refer to PROCEDURE - Step 66 [10/2018 - 10/2020] Refer to PROCEDURE - Step 66 [10/2020 - 07/2022] Refer to PROCEDURE - Step 64 [07/2022 - ]

  12. INSTALL SERVICE PLUG GRIP 

    Refer to INSTALLATION [10/2018 - ]