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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Hybrid Battery Control System - Service Information (1 Of 2)) >> Battery Voltage Sensor >> Removal [11/2023 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

WARNING: This page is about a different variant/trim than selected.

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during battery voltage sensor 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
Replacement of hybrid battery terminal block High voltage fuse accumulated load history reset DTCs are stored Refer to UTILITY [11/2023 - ]
WARNING:
  • Orange wire harnesses and connectors indicate high-voltage circuits. To prevent electric shock, always follow the procedure described in the repair information.

    Refer to PRECAUTION [11/2023 - ]

    GTY588409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  • To prevent electric shock, wear insulated gloves when working on wire harnesses and components of the high voltage system.
    GTY588386Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE:
  • The type of battery voltage sensor to be used varies depending on the vehicle model.
  • The type of battery voltage sensor can be confirmed by the identification code of the label.
    GTY881557Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Identification Code AA
  • If the wrong type of battery voltage sensor is installed, the ignition switch cannot be turned on (READY).
  • After installing the battery voltage sensor, perform the following to check that the ignition switch can be turned on (READY).
    • Turn the ignition switch to on (READY).
    • Turn the ignition switch off and wait for 30 seconds or more.
    • Turn the ignition switch to on (READY) again.
  • After the ignition switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, make sure to wait at least 2 minutes before disconnecting the cable from the negative (-) auxiliary battery terminal.
  • When the cable is disconnected from the negative (-) auxiliary battery terminal and the security lock setting has been enabled, multi-display operations will be disabled upon next startup unless the password is entered. Be sure to check the security lock setting before disconnecting the cable from the negative (-) auxiliary battery terminal.

HINT: 

When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

LEARNING COMPLETES WHEN VEHICLE IS DRIVEN

Effect/Inoperative Function when Necessary Procedure not Performed Necessary Procedure Link
Lane Control System Perform steering sensor zero point calibration Refer to INITIALIZATION [12/2019 - ]
Pre-collision System
Lighting System (EXT) (w/ AFS)
LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function when Necessary Procedure not Performed Necessary Procedure Link
Power Door Lock Control System Initialize back door lock Refer to INITIALIZATION [11/2023 - ]
Power Back Door System Reset back door close position Refer to INITIALIZATION [11/2023 - ]
Air Conditioning System After the ignition switch is turned to ON, the servo motor standard position is recognized. -
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