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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 >> Removal [12/2023 - ] >> Procedure

Removal [12/2023 - ]: Procedure

  1. PRECAUTION 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    WARNING:

    Be sure to read precaution thoroughly before servicing.

    GTY824211Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:

    After turning the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

    Refer to PRECAUTION [11/2020 - ]

  2. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:

    It is necessary to remove the shift control ECU while no power is being supplied from the integration control supply. Therefore, perform the following procedures.

    1. Turn the ignition switch off.
    2. Check that the ODO meter display has turned off.

      HINT: 

      The ODO meter continues to display for 30 seconds after turning off. Therefore, allow sufficient time for the shift control ECU to enter sleep mode and for the integration control supply to end. In addition to monitoring the integrated capacitor (integration control supply) voltage directly, the only other method for checking on the vehicle is to use the ODO meter display.

    3. Disconnect the cable from the negative (-) auxiliary battery terminal.
  3. REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY 

    Refer to REMOVAL [12/2023 - ]

  4. REMOVE SHIFT CONTROL ECU 
    GTY993405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:

    When disconnecting a wire harness of any component connected to the supply power of the integrated capacitor (integration control supply) or when removing the integrated capacitor (integration control supply), make sure to wait 5 minutes or more after turning the ignition switch off for self-diagnosis to complete and the voltage of the integrated capacitor (integration control supply) to discharge.

    1. GTY978867Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE NO. 1 SHIFT CONTROL ECU BRACKET 
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  6. REMOVE NO. 2 SHIFT CONTROL ECU BRACKET 
    1. GTY979203Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002