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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 101 (Battery / Charging System (A25A-FXS) - Diagnostics - Introduction) >> Charging System >> Precaution [11/2023 - ] >> Precaution [11/2023 - ]

Precaution [11/2023 - ]

WARNING: This page is about a different variant/trim than selected.
  1. CHARGING SYSTEM PRECAUTION 
    WARNING:
    • Orange wire harnesses and connectors indicate high-voltage circuits. To prevent electric shock, always follow the procedure described in the repair information.
      GTY588409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Refer to PRECAUTION [11/2023 - ]

    • 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:
    • If the auxiliary battery is fully depleted or the READY indicator does not illuminate, recharge the auxiliary battery.
    • Never disconnect the auxiliary battery while the ignition switch ON (READY).
    • Before giving the auxiliary battery a quick charge, disconnect the auxiliary battery cables.
    • Check the auxiliary battery again before the vehicle is returned to the customer.
    • When replacing the auxiliary battery, use a new auxiliary battery of the same dimensions and same capacity or more from the same class at a 20-hour rate.
    • After replacing the auxiliary battery, install the ventilation hole plug supplied with the new auxiliary battery or the ventilation hole plug from the old auxiliary battery to the ventilation hole on the side to which the battery hose is not connected.
  2. INITIALIZATION 
    NOTE:
    • After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

      Refer to BEFORE DISCONNECTING BATTERY [11/2023 - ]

    • When disconnecting and reconnecting the auxiliary battery.

      HINT: 

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

      Refer to AUTOMATIC LEARNING CHART [11/2023 - ]

    • Make sure to perform the necessary procedures (adjustment, calibration, initialization, or registration) after parts related to the charging system have been removed/installed or replaced.

      Refer to WORK PROCEDURE [11/2023 - ]