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Calibration [12/2019 - ]

NOTE:
  • When the 4WD ECU assembly is replaced, before removing the 4WD ECU assembly, it is necessary to perform ECU Data Save to save the original 4WD ECU assembly information.
  • When the 4WD ECU assembly is replaced, it is necessary to perform ECU Data Write (when replacing 4WD ECU assembly).
  • When the rear 4WD linear solenoid (electro magnetic control coupling sub-assembly) is replaced, it is necessary to perform ECU Data Write (when replacing rear 4WD linear solenoid (electro magnetic control coupling sub-assembly)).
  • When the front 4WD linear solenoid (transfer assembly) or rear 4WD linear solenoid (rear differential carrier assembly) is replaced, it is necessary to perform the following in order: ECU Data Initialization and Disconnect System Function Check.
  • When the temperature sensor is replaced, it is necessary to perform ECU Data Initialization.
    PARTS REPLACEMENT COMPENSATION TABLE

    Replaced Part Necessary Procedure
    4WD ECU assembly
    1. ECU Data Save (ECU being replaced)
    2. ECU Data Write (When replacing 4WD ECU assembly) (New ECU)
    Rear 4WD linear solenoid RH (electro magnetic control coupling sub-assembly RH)
    1. ECU Data Write (When replacing rear 4WD linear solenoid RH (electro magnetic control coupling sub-assembly RH))
    Rear 4WD linear solenoid LH (electro magnetic control coupling sub-assembly LH)
    1. ECU Data Write (When replacing rear 4WD linear solenoid LH (electro magnetic control coupling sub-assembly LH))
    Front 4WD linear solenoid (transfer assembly)
    1. ECU Data Initialization
    2. Disconnect System Function Check
    Rear 4WD linear solenoid (rear differential carrier assembly)
    1. ECU Data Initialization
    2. Disconnect System Function Check
    Temperature sensor
    1. ECU Data Initialization
    Tire
    1. ECU Data Initialization (When performing tire replacement after RoB code X2104 is output)
  1. ECU DATA SAVE 
    1. According to the display on the GTS, perform ECU Data Save.

      Chassis > Four Wheel Drive > Utility 

      Tester Display
      ECU Data Save
      GTY973528Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Rear 4WD Linear Solenoid LH (Electro Magnetic Control Coupling Sub-assembly LH) Compensation Code Label
      GTY973328Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Rear 4WD Linear Solenoid RH (Electro Magnetic Control Coupling Sub-assembly RH) Compensation Code Label

      HINT: 

      If the compensation code cannot be read, record the compensation code (4 digits in 8 blocks) on the electro magnetic control coupling sub-assembly compensation code label.

  2. ECU DATA INITIALIZATION 
    1. According to the display on the GTS, perform ECU Data Initialization.

      Chassis > Four Wheel Drive > Utility 

      Tester Display
      ECU Data Initialization
  3. ECU DATA WRITE (WHEN REPLACING REAR 4WD LINEAR SOLENOID (ELECTRO MAGNETIC CONTROL COUPLING SUB-ASSEMBLY)) 
    1. Record the printed compensation code (4 digits in 8 blocks) of a new rear 4WD linear solenoid (electro magnetic control coupling sub-assembly).
      GTY973528Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Rear 4WD Linear Solenoid LH (Electro Magnetic Control Coupling Sub-assembly LH) Compensation Code Label
      GTY973328Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Rear 4WD Linear Solenoid RH (Electro Magnetic Control Coupling Sub-assembly RH) Compensation Code Label
    2. According to the display on the GTS, perform ECU Data Write.

      Chassis > Four Wheel Drive > Utility 

      Tester Display
      ECU Data Write
    3. Using the on-screen buttons, input the compensation code.
    4. According to the display on the GTS, complete work.
  4. ECU DATA WRITE (WHEN REPLACING 4WD ECU ASSEMBLY) 
    1. According to the display on the GTS, perform ECU Data Write.

      Chassis > Four Wheel Drive > Utility 

      Tester Display
      ECU Data Write
  5. DISCONNECT SYSTEM FUNCTION CHECK 

    HINT: 

    Perform this work with 4 or more people as the tires need to be rotated by hand when working.

    1. According to the display on the GTS, perform Disconnect System Function Check.

      Chassis > Four Wheel Drive > Utility 

      Tester Display
      Disconnect System Function Check
      WARNING:

      Do not hold the inside of the wheel when rotating the tire, as doing so could pinch your fingers.

      NOTE:

      If disconnect switching fails, perform the same procedure. If it fails again, inspect the part.

      When replacing the front 4WD linear solenoid (transfer assembly):

      Refer to INSTALLATION [12/2019 - 10/2022] , or refer to INSTALLATION [10/2022 - ]

      When replacing the rear 4WD linear solenoid (rear differential carrier assembly):

      Refer to INSTALLATION [12/2019 - ]

      GTY910900Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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