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Home >> Toyota >> 2021 >> Mirai Limited >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Hybrid Transaxle System - Service Information (2 Of 2) >> Oil Cooler >> Installation [11/2020 - 12/2023] >> Procedure

Installation [11/2020 - 12/2023]: Procedure

  1. INSTALL TRANSMISSION OIL COOLER BRACKET 
    1. GTY979315Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt A Bolt B
      Bolt C Bolt D
      1. Temporarily install the transmission oil cooler bracket to the vehicle body with the 2 clips.
      2. Install the transmission oil cooler bracket to the vehicle body with the 4 bolts.

        Torque: 19 N.m (194 kgf/cm, 14 ft.lbf) 

        HINT: 

        Tightening order: Temporarily install bolt A → Temporarily install bolt B → Temporarily install bolt C and bolt D → Tighten bolt A → Tighten bolt B → Tighten bolt C and bolt D

  2. INSTALL TRANSMISSION OIL COOLER AIR DUCT 
  3. INSTALL OIL COOLER ASSEMBLY 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:

    The oil cooler assembly is common part on the left and right, and is not a symmetrical part. Be careful of the tightening order.

    1. GTY979432Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt A Bolt B
      Bolt C Bolt D
      1. Install the oil cooler assembly to the vehicle body with the 4 bolts.

        Torque: 19 N.m (194 kgf/cm, 14 ft.lbf) 

        HINT: 

        Tightening order: Temporarily install bolt A → Temporarily install bolt B → Temporarily install bolt C and bolt D → Tighten bolt A → Tighten bolt B → Tighten bolt C and bolt D

  4. INSTALL NO. 2 TRANSMISSION OIL COOLER BRACKET 
    1. GTY980256Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt A Bolt B
      Bolt C Bolt D
      1. Temporarily install the No. 2 transmission oil cooler bracket to the vehicle body with the 2 clips.
      2. Install the No. 2 transmission oil cooler bracket to the vehicle body with the 4 bolts.

        Torque: 19 N.m (194 kgf/cm, 14 ft.lbf) 

        HINT: 

        Tightening order: Temporarily install bolt A → Temporarily install bolt B → Temporarily install bolt C and bolt D → Tighten bolt A → Tighten bolt B → Tighten bolt C and bolt D

  5. INSTALL TRANSMISSION OIL COOLER AIR DUCT LH 
  6. INSTALL OIL COOLER ASSEMBLY 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:

    The oil cooler is common part on the left and right, and is not a symmetrical part. Be careful of the tightening order.

    1. GTY980179Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt A Bolt B
      Bolt C Bolt D
      1. Install the oil cooler assembly to the vehicle body with the 4 bolts.

        Torque: 19 N.m (194 kgf/cm, 14 ft.lbf) 

        HINT: 

        Tightening order: Temporarily install bolt A → Temporarily install bolt B → Temporarily install bolt C and bolt D → Tighten bolt A → Tighten bolt B → Tighten bolt C and bolt D

  7. CONNECT OIL COOLER TUBE SUB-ASSEMBLY 
    1. GTY977586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Right Side of Vehicle *B Left Side of Vehicle
      *1 Oil Cooler Tube Sub-assembly (Oil Cooler Inlet Hose) *2 Oil Cooler Tube Sub-assembly (Oil Cooler Outlet Hose)
      *a Oil Cooler Marking *b Hose Marking
      *c Upper Side of Vehicle *d Left Side of Vehicle
      *e 4 to 7 mm (0.158 to 0.275 in.) *f 2 to 4 mm (0.0788 to 0.158 in.)
      *g 120°(Claw of Clip Location) - -
      1. Connect the oil cooler tube sub-assembly (oil cooler inlet hose) and oil cooler tube sub-assembly (oil cooler outlet hose) to the 2 oil cooler assemblies, and slide the 4 clips to secure them.
        NOTE:
        • Make sure to align the hose marking of the oil cooler inlet hose and oil cooler outlet hose with the oil cooler marking of the oil cooler assembly.
        • Make sure that the claws of the clip are within the location shown in the illustration.
  8. ADD HYBRID TRANSAXLE FLUID 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Refer to PROCEDURE - Step 5
  9. BLEED AIR FROM HYBRID TRANSAXLE FLUID LINE 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Refer to PROCEDURE - Step 6
  10. INSPECT HYBRID TRANSAXLE FLUID 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Refer to PROCEDURE - Step 4
  11. INSPECT FOR HYBRID TRANSAXLE FLUID LEAK 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Refer to PROCEDURE - Step 7
  12. INSTALL REAR SUSPENSION BRACE COVER 
  13. INSTALL NO. 2 DIFFERENTIAL SUPPORT PROTECTOR 
  14. INSTALL NO. 1 DIFFERENTIAL SUPPORT PROTECTOR 
  15. INSTALL TRANSMISSION OIL COOLER UNDER COVER RH 
  16. INSTALL TRANSMISSION OIL COOLER UNDER COVER LH 
  17. INSTALL NO. 1 FLOOR UNDER COVER