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Home >> Lexus >> 2021 >> LS 500h AWD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Sub Battery System - Service Information >> SUB BATTERY (w/ Front LiDAR Sensor) >> Removal [10/2023 - ] >> Procedure

Removal [10/2023 - ]: Procedure

  1. PRECAUTION 
    NOTE:
    • After the power switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

      Refer to BEFORE DISCONNECTING BATTERY [10/2023 - ]

    • If the multi power control sub-battery is subjected to an impact, replace it with a new one.
    • When storing the multi power control sub-battery, do not store for 24 hours or more on its side, flipped upside down or in a tilted condition.
    • If the multi power control sub-battery was replaced, turn the power switch to ON and then off with the shift position in P and wait 3 seconds to perform ECU learning.
    • Store the multi power control sub-battery in a location away from rainwater.
    • Do not stand on the multi power control sub-battery.
    • Refer to the table below for the combination of the multi power control ECU assembly and multi power control sub-battery.
      Parts Combination 1 Combination 2
      Letters on Multi Power Control ECU Label #A #B
      Letters on Multi Power Control Sub-battery Label #1 #2
    GTY1162344Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 Multi Power Control ECU Assembly
    *2 Multi Power Control Sub-battery
    *a Label
  2. REMOVE LUGGAGE COMPARTMENT MAT SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 25

  3. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL 

    Refer to REMOVAL [10/2023 - ]

  4. REMOVE LUGGAGE COMPARTMENT FLOOR MAT 

    Refer to PROCEDURE - Step 24

  5. REMOVE LUGGAGE COMPARTMENT TRIM COVER RH 

    Refer to PROCEDURE - Step 27

  6. REMOVE LUGGAGE COMPARTMENT TRIM COVER LH 

    Refer to PROCEDURE - Step 26

  7. REMOVE FRONT LUGGAGE COMPARTMENT TRIM COVER 

    HINT: 

    Use the same procedure described for the front luggage compartment trim cover (w/o Advanced Drive).

    Refer to PROCEDURE - Step 30

  8. REMOVE SERVICE PLUG GRIP 

    Refer to REMOVAL [10/2023 - ]

  9. REMOVE CONNECTOR COVER ASSEMBLY 

    Refer to PROCEDURE - Step 12

  10. CHECK TERMINAL VOLTAGE 

    Refer to PROCEDURE - Step 13

  11. TEMPORARILY INSTALL CONNECTOR COVER ASSEMBLY 

    Refer to PROCEDURE - Step 14

  12. REMOVE NO. 3 SUB-BATTERY MULTI POWER BRACKET 
    1. Remove the 2 bolts and No. 3 sub-battery multi power bracket from the No. 1 sub-battery multi power bracket.
      GTY1084693Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. DISCONNECT NO. 3 FLOOR WIRE 
    WARNING:

    Wear insulated gloves.

    1. Disengage the claw and open the No. 3 floor wire terminal cover.
      GTY1084764Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Remove in this Direction
    2. Remove the nut and disconnect the No. 3 floor wire from the DC/DC converter assembly.
      GTY1084718Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the 2 connectors.
      GTY1084695Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the bolt and disconnect the earth wire from the No. 2 sub-battery multi power bracket.
    5. Disengage the clamp and disconnect the No. 3 floor wire from the No. 1 sub-battery multi power bracket and No. 2 sub-battery multi power bracket.
  14. REMOVE MULTI POWER CONTROL SUB-BATTERY 
    1. Disengage the claw and disconnect the sub-battery multi power hose sub-assembly from the multi power control sub-battery.
      GTY1084694Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 4 nuts and multi power control sub-battery from the No. 2 sub-battery multi power bracket.
      GTY1084697Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. REMOVE NO. 1 SUB-BATTERY MULTI POWER BRACKET 
    1. Remove the 4 bolts and No. 1 sub-battery multi power bracket from the multi power control sub-battery.
      GTY1084696Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. REMOVE SUB-BATTERY MULTI POWER HOSE SUB-ASSEMBLY 

    HINT: 

    Only perform this procedure when replacement of the sub-battery multi power hose sub-assembly is necessary.

    1. Detach the grommet and remove the sub-battery multi power hose sub-assembly from the center floor pan.
      GTY1084698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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