LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2019 >> LS 500 Base, AWD >> Repair and Diagnosis >> Electrical >> Charging Systems >> Sub Battery System - Diagnostic Codes & Circuit Tests >> Sub Battery System >> DTC B22E2: Sub Battery Module State of Charge (Overdischarge) [12/2017 - 10/2023] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B22E2: Sub Battery Module State of Charge (Overdischarge) [12/2017 - 10/2023]: Procedure

  1. INSPECT CHARGING SYSTEM 
    1. Inspect charging system.

      Refer to ON-VEHICLE INSPECTION [12/2017 - 10/2020] , or refer to ON-VEHICLE INSPECTION [10/2020 - 10/2022] , or refer to ON-VEHICLE INSPECTION [10/2022 - 10/2023]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CHARGING SYSTEM 

    Result: 

    OK 

    See step  2

  2. CHARGE SUB-BATTERY MODULE ASSEMBLY 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Body Electrical > Sub Battery Module > Clear DTCs 

    5. Turn the engine switch off and wait for at least 30 seconds.
    6. Turn the engine switch on (IG) and turn the Techstream on.
    7. Enter the following menus: Body Electrical / Sub Battery Module / Data List / Sub Battery Module State of Charge.

      Body Electrical > Sub Battery Module > Data List 

      Tester Display
      Sub Battery Module State of Charge
    8. Start the engine and while idling, perform charging until the "Sub Battery Module State of Charge" reaches at least 20%*.

      HINT: 

      *: Depending on the current charge of the sub-battery, it may take more than 30 minutes for the SOC (State of Charge) to reach 20% or more.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    END