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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Electric Motor Systems >> Hybrid Battery Control System - Service Information (1 Of 5) >> Hybrid Vehicle Control Ecu >> Installation [10/2023 - ] >> Procedure

Installation [10/2023 - ]: Procedure

  1. INSTALL HYBRID VEHICLE CONTROL ECU ASSEMBLY 
    1. Install the hybrid vehicle control ECU assembly with the bolt and nut.

      Torque: 7.5 N.m (76 kgf/cm, 66 in.lbf) 

      NOTE:
      • Do not drop the hybrid vehicle control ECU assembly, strike it with tools or subject it to impact.
      • If the hybrid vehicle control ECU assembly is subjected to an impact, replace it with a new one.
    2. Connect the 3 connectors.
  2. INSTALL GLOVE COMPARTMENT DOOR ASSEMBLY 

    Refer to PROCEDURE - Step 14

  3. INSTALL GLOVE COMPARTMENT DOOR PAD PLATE 

    Refer to PROCEDURE - Step 15

  4. INSTALL LOWER INSTRUMENT PANEL FINISH PANEL ASSEMBLY 

    Refer to PROCEDURE - Step 24

  5. INSTALL LOWER NO. 1 INSTRUMENT PANEL PAD SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 32

  6. INSTALL INSTRUMENT SIDE PANEL LH 

    Refer to PROCEDURE - Step 35

  7. INSTALL LOWER NO. 2 INSTRUMENT PANEL AIRBAG ASSEMBLY 

    Refer to INSTALLATION [10/2023 - ]

  8. CONNECT CABLE TO NEGATIVE AUXILIARY BATTERY TERMINAL 

    Refer to PROCEDURE - Step 2

  9. INSTALL LUGGAGE COMPARTMENT MAT SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 13

  10. UPDATE ECU SECURITY KEY 

    Refer to UPDATE ECU SECURITY KEY [10/2020 - ]

  11. INITIALIZATION AFTER RECONNECTING AUXILIARY BATTERY TERMINAL 

    Refer to WORK PROCEDURE [10/2022 - ]

    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 [10/2023 - ]

  12. PERFORM RESET MEMORY 

    If the hybrid vehicle control ECU assembly is replaced, initialize the learning value of the transmission.

    Refer to INITIALIZATION [10/2017 - ]