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Home >> Toyota >> 2021 >> Mirai Limited >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Hybrid Transaxle System - Service Information (2 Of 2) >> Shift Control Ecu >> Installation [12/2022 - ] >> Procedure

Installation [12/2022 - ]: Procedure

  1. INSTALL NO. 2 SHIFT CONTROL ECU BRACKET 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:

    Do not deform the No. 2 shift control ECU bracket.

    1. GTY979348Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Align the protrusion of the No. 2 shift control ECU bracket with the cutout of the shift control ECU. - -

      Torque: 4.5 N.m (46 kgf/cm, 40 in.lbf) 

  2. INSTALL NO. 1 SHIFT CONTROL ECU BRACKET 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:

    Do not deform the No. 1 shift control ECU bracket.

    1. GTY979932Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Align the protrusion of the No. 1 shift control ECU bracket with the cutout of the shift control ECU. - -

      Torque: 4.5 N.m (46 kgf/cm, 40 in.lbf) 

  3. INSTALL SHIFT CONTROL ECU 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • Do not deform the No. 1 shift control ECU bracket and No. 2 shift control ECU bracket when installing the shift control ECU.
    • Avoid any impact to the shift control ECU.
    • If shift control ECU is dropped, replace it with a new one.

    Torque: 7.5 N.m (76 kgf/cm, 66 in.lbf) 

  4. INSTALL GLOVE COMPARTMENT DOOR ASSEMBLY 

    Refer to INSTALLATION [12/2022 - ]

  5. CONNECT CABLE TO NEGATIVE AUXILIARY BATTERY TERMINAL 

    Refer to INSTALLATION [12/2022 - ]

  6. CHECK AND CLEAR DTC 

    Refer to UTILITY [11/2020 - 12/2023] , or refer to UTILITY [12/2023 - ]

  7. UPDATE ECU SECURITY KEY 

    Refer to UPDATE ECU SECURITY KEY [11/2020 - ]

  8. CHECK SRS WARNING LIGHT 

    Refer to OPERATION CHECK [11/2020 - ]

  9. INITIALIZATION AFTER RECONNECTING BATTERY TERMINAL 

    HINT: 

    When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

    Refer to AUTOMATIC LEARNING CHART [11/2021 - 12/2023] , or refer to AUTOMATIC LEARNING CHART [12/2023 - ]

  10. CONFIRMATION WORK AFTER REPLACING SHIFT CONTROL ECU 
    1. After replacing the shift control ECU, check for the following symptoms. If any of these symptoms exists, be sure to perform the following procedure starting from step b.
      • The P position switch blinks when the ignition switch is turned to ON or ON (READY) and the shift position is not in P.
      • The power source off automatic P function does not operate.
      • The shift position is not displayed on the meter until a shift change operation is performed.
    2. Turn the ignition switch to ON.
    3. Press the P position switch and change the shift position to P.
    4. Turn the ignition switch to ON (READY).
    5. Depress the brake pedal and operate the shift lever to change the shift position to D.
    6. Check that the P position switch does not blink when the ignition switch is turned to ON or ON (READY), and the shift position is not in P.
      NOTE:

      If the P position switch is blinking, be sure to perform steps b. through e. again.