LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2024 >> NX 250 FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Hybrid Transaxle System (P810) - Service Information) >> Hybrid Vehicle Transaxle >> Installation [11/2021 - 03/2024] >> Procedure

Installation [11/2021 - 03/2024]: Procedure

WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSTALL TRANSAXLE HOUSING TUBE CONNECTOR 

    HINT: 

    Perform this procedure only when replacement of the transaxle housing tube connector or O-ring is necessary.

    1. GTY1064458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Coat 2 new O-rings with Toyota Genuine ATF WS and install them to the 2 transaxle housing tube connectors.
      2. Using a 19 mm deep socket wrench, install the 2 transaxle housing tube connectors to the hybrid vehicle transaxle assembly.

        Torque: 15 N.m (153 kgf/cm, 11 ft.lbf) 

  2. INSTALL TRANSAXLE BREATHER PLUG 

    HINT: 

    Perform this procedure only when replacement of the transaxle breather plug is necessary.

    Torque: 11.3 N.m (115 kgf/cm, 8 ft.lbf) 

  3. INSTALL STUD BOLT 
    1. GTY1063837Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Apply adhesive to the 2 stud bolts.

        Adhesive

        Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent

      2. Using an E10 "TORX" socket wrench, install the 2 stud bolts to the hybrid vehicle transaxle assembly.

        Torque: 30 N.m (306 kgf/cm, 22 ft.lbf) 

  4. INSTALL TRANSAXLE HOUSING PLUG 

    Torque: 39.2 N.m (400 kgf/cm, 29 ft.lbf) 

  5. INSTALL WIRE HARNESS CLAMP BRACKET 
    1. GTY1063499Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Bolt (A) 

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

      Bolt (B) 

      Torque: 30 N.m (306 kgf/cm, 22 ft.lbf) 

  6. INSTALL NO. 3 INVERTER BRACKET 
    1. GTY1063220Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Install the No. 3 inverter bracket to the hybrid vehicle transaxle assembly with the bolt as shown in the illustration.

        Torque: 55 N.m (561 kgf/cm, 41 ft.lbf) 

      2. Install the 5 bolts.

        Torque: 55 N.m (561 kgf/cm, 41 ft.lbf) 

  7. INSTALL NO. 2 MOTOR COOLING PIPE 
    1. GTY1063579Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Oil Cooler Union Bolt *2 Gasket
      1. Temporarily install the No. 2 motor cooling pipe to the hybrid vehicle transaxle assembly with the oil cooler union bolt and a new gasket.
      2. Temporarily install the bolt (A).
      3. Install the bolt (B).

        Torque: 19.5 N.m (199 kgf/cm, 14 ft.lbf) 

      4. Tighten the bolt (A).

        Torque: 19.5 N.m (199 kgf/cm, 14 ft.lbf) 

      5. Tighten the oil cooler union bolt.

        Torque: 35 N.m (357 kgf/cm, 26 ft.lbf) 

  8. INSTALL NO. 2 TRANSMISSION OIL COOLER BRACKET 
    1. Fig 1: No. 2 Transmission Oil Cooler Bracket Bolts Tightening Sequence
      GTY1064363Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Temporarily Tighten - -
      1. Install the No. 2 transmission oil cooler bracket to the hybrid vehicle transaxle assembly with the 2 bolts in the order shown in the illustration.

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

  9. INSTALL NO. 4 MOTOR COOLING PIPE (w/o Water Cooled) 
    1. Fig 2: No. 4 Motor Cooling Pipe Bolts Tightening Sequence
      GTY1064794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Temporarily Tighten - -
      1. Install the No. 4 motor cooling pipe to the No. 2 transmission oil cooler bracket with the 2 bolts in the order shown in the illustration.

        Torque: 11.5 N.m (117 kgf/cm, 8 ft.lbf) 

    2. GTY1064622Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 0 to 3 mm (0 to 0.118 in.) *b 2 to 7 mm (0.0787 to 0.276 in.)
      *c Paint Mark *d Marking
      *e Center of Paint Mark *f 45° (Claw of Clip Location)
      1. Connect the No. 1 motor cooling hose to the transaxle housing tube connector, and slide the clip to secure it.
        NOTE:
        • Make sure to slide the No. 1 motor cooling hose until it contacts the hose stopper of the transaxle housing tube connector.
        • Make sure to align the paint mark of the No. 1 motor cooling hose with the marking of the hybrid vehicle transaxle assembly.
        • Make sure that the claws of the clip are within the location shown in the illustration.
  10. INSTALL MOTOR COOLING COOLER (w/ Water Cooled) 
    1. Fig 3: Motor Cooling Cooler Bolts Tightening Sequence
      GTY1063223Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Temporarily Tighten - -
      1. Install the motor cooling cooler to the No. 2 transmission oil cooler bracket with the 3 bolts in the order shown in the illustration.

        Torque: 11.5 N.m (117 kgf/cm, 8 ft.lbf) 

    2. GTY1065186Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 0 to 3 mm (0 to 0.118 in.) *b 2 to 7 mm (0.0787 to 0.276 in.)
      *c Paint Mark *d Marking
      *e Center of Paint Mark *f 45° (Claw of Clip Location)
      1. Connect the No. 1 motor cooling hose to the hybrid transaxle tube connector, and slide the clip to secure it.
        NOTE:
        • Make sure to slide the No. 1 motor cooling hose until it contacts the hose stopper of the hybrid transaxle tube connector.
        • Make sure to align the paint mark of the No. 1 motor cooling hose with the marking of the hybrid vehicle transaxle assembly.
        • Make sure that the claws of the clip are within the location shown in the illustration.
  11. INSTALL MOTOR CABLE 
    See step  1
  12. INSTALL TERMINAL CAP 
    See step  2
  13. INSTALL CONNECTOR COVER 
    See step  3
  14. INSTALL HYBRID VEHICLE TRANSAXLE ASSEMBLY 
    1. GTY1065326Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Knock Pin - -
      1. Make sure that the knock pins are installed to the engine assembly.
      2. Align the knock pins with the holes in the hybrid vehicle transaxle assembly and, while keeping the contact surfaces of the engine assembly and hybrid vehicle transaxle assembly in close contact with one another, temporarily install the bolt.
        NOTE:
        • When tightening the bolts, be sure that the contact surfaces of the engine assembly and hybrid vehicle transaxle assembly are in close contact with one another.
        • Do not apply grease to the inner splines of the transmission input damper assembly or input shaft assembly.
        • Make sure that the wire harness or similar items are not pinched between the contact surfaces.
        • Do not use excessive force when installing the hybrid vehicle transaxle assembly.
        • Make sure to align the hybrid vehicle transaxle assembly so that the input shaft assembly of the hybrid vehicle transaxle assembly will be inserted straight into the inner splines of the transmission input damper assembly.
        • When inserting the input shaft assembly of the hybrid vehicle transaxle assembly into the inner splines of the transmission input damper assembly, do not shake the hybrid vehicle transaxle assembly excessively.
        • When installing the hybrid vehicle transaxle assembly to the engine assembly, make sure to securely fit the knock pins into the knock pin holes.
      3. While keeping the contact surfaces of the engine assembly and hybrid vehicle transaxle assembly in close contact with one another, install the 8 bolts.
        Bolt Bolt Length Torque
        (A) 50 mm (1.97 in.) 64 N.m (653 kgf/cm, 47 ft.lbf)
        (B), (C) 45 mm (1.77 in.) 46 N.m (469 kgf/cm, 34 ft.lbf)
        (D) 35 mm (1.38 in.) 25 N.m (255 kgf/cm, 18 ft.lbf)

        HINT: 

        • Bolt (A), (B), (D): Install from the hybrid vehicle transaxle assembly side.
        • Bolt (C): Install from the engine assembly side.
  15. INSTALL REAR ENGINE MOUNTING BRACKET 
    1. GTY1063688Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Install the rear engine mounting bracket to the hybrid vehicle transaxle assembly with the 4 bolts.

        Torque: 42 N.m (428 kgf/cm, 31 ft.lbf) 

        HINT: 

        Tightening order: Temporarily tighten bolt (A) → Fully tighten bolt (B) → Fully tighten bolt (A) → Fully tighten bolt (C)

  16. INSTALL REAR ENGINE MOUNTING INSULATOR 
    Refer to PROCEDURE - Step 12
  17. INSTALL FRONT ENGINE MOUNTING BRACKET 
    1. GTY1064552Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Install the front engine mounting bracket to the hybrid vehicle transaxle assembly with the 3 bolts.

        Torque: 42 N.m (428 kgf/cm, 31 ft.lbf) 

        HINT: 

        Tightening order: Temporarily tighten bolt (A) → Fully tighten bolt (B) → Fully tighten bolt (C) → Fully tighten bolt (A)

  18. INSTALL FRONT ENGINE MOUNTING INSULATOR 

    Refer to PROCEDURE - Step 13

  19. INSTALL FRONT FRAME ASSEMBLY 

    Refer to PROCEDURE - Step 10

  20. INSTALL FLYWHEEL HOUSING SIDE COVER 
  21. INSTALL OIL PUMP WITH MOTOR ASSEMBLY 

    See step  1

  22. INSTALL WIRE HARNESS CLAMP BRACKET 

    See step  2

  23. INSTALL NO. 1 MOTOR COOLING PIPE 
    1. GTY1065043Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Torque Wrench Fulcrum Length - -
      1. Temporarily install the flare nut of a new No. 1 motor cooling pipe to the union.
      2. Install the No. 2 oil cooler tube clamp and No. 1 motor cooling pipe to the No. 2 motor cooling pipe with the bolt.

        Torque: 8.2 N.m (84 kgf/cm, 73 in.lbf) 

      3. Using a 17 mm union nut wrench, tighten the flare nut to connect the No. 1 motor cooling pipe.

        Specified Tightening Torque 

        Torque: 34.3 N.m (350 kgf/cm, 25 ft.lbf) 

        HINT: 

        • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

          Refer to PRECAUTION [11/2021 - ]

        • When using a 17 mm union nut wrench (fulcrum length of 30 mm (1.18 in.)) + torque wrench (fulcrum length of 180 mm (7.09 in.)):

          29.4 N.m (300 kgf/cm, 22 ft.lbf)

  24. INSTALL NO. 2 TRANSMISSION OIL COOLER HOSE ASSEMBLY 
    1. GTY1065805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 0 to 3 mm (0 to 0.118 in.) *b 2 to 7 mm (0.0787 to 0.276 in.)
      *c Paint Mark *d Marking
      *e Center of Paint Mark *f 45° (Claw of Clip Location)
      *g 30° (Center of Clip Location) - -
      1. Engage the hose clamp to install the No. 2 transmission oil cooler hose assembly to the No. 2 motor cooling pipe.
      2. Connect the No. 2 transmission oil cooler hose assembly to the No. 1 motor cooling pipe and slide the clip to secure it.
        NOTE:
        • Make sure to slide the No. 2 transmission oil cooler hose assembly until it contacts the hose stopper of the No. 1 motor cooling pipe.
        • Make sure to align the paint mark of the No. 2 transmission oil cooler hose assembly with the paint mark of the No. 1 motor cooling pipe.
        • Make sure that the claws of the clip are within the location shown in the illustration.
      3. Connect the No. 2 transmission oil cooler hose assembly.
        • w/o Water Cooled:
          1. 1. Connect the No. 2 transmission oil cooler hose assembly to the No. 4 motor cooling pipe and slide the clip to secure it.
            NOTE:
            • Make sure to slide the No. 2 transmission oil cooler hose assembly until it contacts the hose stopper of the No. 4 motor cooling pipe.
            • Make sure to align the paint mark of the No. 2 transmission oil cooler hose assembly with the paint mark of the No. 4 motor cooling pipe.
            • Make sure that the claws of the clip are within the location shown in the illustration.
        • w/ Water Cooled:
          1. 1. Connect the No. 2 transmission oil cooler hose assembly to the motor cooling cooler and slide the clip to secure it.
            NOTE:
            • Make sure to slide the No. 2 transmission oil cooler hose assembly until it contacts the hose stopper of the motor cooling cooler.
            • Make sure to align the paint mark of the No. 2 transmission oil cooler hose assembly with the paint mark of the motor cooling cooler.
            • Make sure that the claws of the clip are within the location shown in the illustration.
      4. Connect the No. 2 transmission oil cooler hose assembly to the oil pump with motor assembly and slide the 2 clips to secure it.
        NOTE:
        • Make sure to slide the No. 2 transmission oil cooler hose assembly until it contacts the hose stopper of the oil pump with motor assembly.
        • Make sure to align the paint mark on each No. 2 transmission oil cooler hose assembly with each marking on the oil pump with motor assembly.
        • Make sure that the claws of the clip are within the location shown in the illustration.
  25. INSTALL TRANSAXLE UNDER STOPPER BRACKET 
    1. GTY1063731Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Install the transaxle under stopper bracket to the hybrid vehicle transaxle assembly with the 4 bolts.

        Torque: 44 N.m (449 kgf/cm, 32 ft.lbf) 

        HINT: 

        Tightening order: Temporarily tighten bolt (A) → Fully tighten bolt (B) → Fully tighten bolt (C) → Fully tighten bolt (A)

  26. CONNECT HV AIR CONDITIONING WIRE 

    Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

  27. CONNECT ENGINE WIRE 
    1. GTY1064573Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

    2. GTY1065364Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Engage the 6 clamps to connect the engine wire.
      2. Connect the engine wire with the 2 bolts.

        Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

      3. Connect the wire harness connector to the rack and pinion power steering gear assembly.

        HINT: 

        Make sure that the connector is fully inserted before rotating the lock lever to engage the lock.

  28. INSTALL STEERING GEAR HEAT INSULATOR 
    Refer to PROCEDURE - Step 7
  29. INSTALL ENGINE ASSEMBLY WITH TRANSAXLE 

    Refer to INSTALLATION [11/2021 - 03/2024]

  30. PERFORM RESOLVER LEARNING 
    NOTE:

    If the hybrid vehicle transaxle assembly has been replaced, make sure to perform resolver learning.

    Refer to UTILITY [11/2021 - ]
scientia non olet · About LEMON Manuals