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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission System (UA80F) - Service Information (2 Of 2) >> Automatic Transaxle Assembly >> Removal [09/2020 - 10/2022] >> Caution / Notice / Hint

Caution / Notice / Hint

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during automatic transaxle assembly removal/installation are shown below.

NECESSARY PROCEDURES AFTER PARTS REMOVED/INSTALLED/REPLACED

Replaced Part or Performed Procedure Necessary Procedure Effect/Inoperative Function when Necessary Procedure not Performed Link
Battery terminal is disconnected/reconnected Idle the engine for approximately 5 to 60 minutes or drive the vehicle until stop and start control is permitted Stop and Start System Refer to PRECAUTION [12/2019 - 10/2022]
Perform steering sensor zero point calibration Lane Control System Refer to INITIALIZATION [12/2019 - ]
Parking Support Brake System*1
Pre-collision System
Lighting System (EXT) (w/ AFS)
Memorize steering angle neutral point Parking Assist Monitor System Refer to INITIALIZATION [12/2019 - 10/2022]
Panoramic View Monitor System Refer to INITIALIZATION [12/2019 - 10/2022]
Initialize back door lock Power Door Lock Control System Refer to INITIALIZATION [12/2019 - 11/2023]
Reset back door close position Power Back Door System Refer to INITIALIZATION [12/2019 - 11/2023]
Replacement of ECM Perform Vehicle Identification Number (VIN) or frame number registration DTC is output Refer to REGISTRATION [12/2019 - 10/2022]
Code registration Engine start function Refer to REGISTRATION [12/2019 - 10/2021] , or refer to REGISTRATION [10/2021 - 10/2022]
If transaxle compensation code read from ECM 
  • Perform reset memory*2
  • Transfer transaxle compensation code
  • Perform road test to allow ECM to learn
  • Large shift shock
  • Deterioration of fuel efficiency
 for Initialization:
Refer to INITIALIZATION [12/2019 - 10/2022]
for Registration:
Refer to REGISTRATION [12/2019 - 10/2022]
If transaxle compensation code not read from ECM 
  • Perform reset memory*2
  • Reset transaxle compensation code
  • Perform road test to allow ECM to learn
  • Replacement of engine assembly
  • Gas leak from exhaust system is repaired
 Perform Inspection After Repair
  • Poor idle, etc.
  • Engine start function, etc.
 Refer to INITIALIZATION [12/2019 - 10/2022]
Replacement of starter assembly*3 Clear the number of starter operations Stop and Start System Refer to REGISTRATION [12/2019 - 10/2022]
Replacement of battery
  • Integrated Current Value Initialization
  • Switch Battery Type
Replacement of automatic transaxle assembly
  • Perform reset memory
  • Input transaxle compensation code into ECM
  • Perform road test to allow ECM to learn
  • Large shift shock
  • Deterioration of fuel efficiency
 for Initialization:
Refer to INITIALIZATION [12/2019 - 10/2022]
for Registration:
Refer to REGISTRATION [12/2019 - 10/2022]
Replacement of automatic transaxle fluid ATF thermal degradation estimate reset The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly Refer to INITIALIZATION [12/2019 - 10/2022]
for Dynamic Torque Control AWD System: 
  1. Front 4WD linear solenoid (Transfer assembly)
  • ECU data initialization
  • Disconnect system function check
 Dynamic Torque Control AWD System Refer to CALIBRATION [12/2019 - ]
for Dynamic Torque Vectoring AWD system: 
  1. Front 4WD linear solenoid (Transfer assembly)
  • ECU data initialization
  • Disconnect system function check
 Dynamic Torque Vectoring AWD System Refer to CALIBRATION [12/2019 - ]
Replacement of front bumper assembly*4
  • Measurement of ultrasonic sensor detection angle
  • Ultrasonic sensor detection angle registration
 Parking Support Brake System Refer to CALIBRATION [12/2019 - 11/2023]
Front television camera view adjustment Panoramic View Monitor System Refer to CALIBRATION [12/2019 - 10/2022]
Suspension, tires, etc.*5
  • Measurement of ultrasonic sensor detection angle
  • Ultrasonic sensor detection angle registration
 Parking Support Brake System Refer to CALIBRATION [12/2019 - 11/2023]
Rear television camera assembly optical axis (Back camera position setting) Parking Assist Monitor System Refer to CALIBRATION [12/2019 - 10/2022]
  • Parking assist ECU initialization
  • Adjust steering angle
 Panoramic View Monitor System Refer to CALIBRATION [12/2019 - 10/2022]
Perform headlight ECU sub-assembly LH initialization Lighting System (EXT) (w/ AFS) Refer to INITIALIZATION [12/2019 - 11/2023]
Replacement or removal and installation of 2 or more parts: 
  • Front television camera assembly, radiator grille sub-assembly or front bumper assembly
  • Rear television camera assembly
  • Side television camera assembly LH or outer rear view mirror assembly LH
  • Side television camera assembly RH or outer rear view mirror assembly RH
 Television camera view adjustment Panoramic View Monitor System Refer to CALIBRATION [12/2019 - 10/2022]
Front wheel alignment adjustment
  1. Perform "Reset Memory"
  2. Perform "Calibration".
  • VSC is disabled or malfunctions
  • DTCs are output
  • Slip indicator light illuminates
  • ABS warning light illuminates
 Refer to UTILITY [12/2019 - 11/2023]

*1: Learning can also be performed using the GTS.

*2: Not necessary when ECM replaced with new one

*3: When the starter assembly is replaced, "ST relay" must be also replaced

*4: Even when not replacing the part, it is necessary to perform the specified necessary procedures after installation.

*5: If the vehicle height has changed due to suspension or tire replacement

WARNING:
  • The engine assembly with transaxle is very heavy. Be sure to follow the procedure described in the repair information, or the engine lifter may suddenly drop or the engine assembly with transaxle may fall off the engine lifter.
    GTY566510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a An Object Exceeding Weight Limit of Engine Lifter
  • To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
    GTY563663Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  • The automatic transaxle assembly is very heavy. Be sure to follow the procedure described in the repair information, or the transmission jack may suddenly drop.
    GTY559497Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a An Object Exceeding Weight Limit of Transmission Jack
NOTE:
  • After the ignition switch is turned off, the radio and display receiver assembly or the radio receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, make sure to wait at least 120 seconds before disconnecting the cable from the negative (-) auxiliary battery terminal.
  • If the ECM has been struck or dropped, replace it.
  • Perform Vehicle Identification Number (VIN) or frame number registration when replacing the ECM.

    Refer to REGISTRATION [12/2019 - 10/2022]

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