LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - Service Information >> ECM >> Installation [10/2023 - ] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Installation [10/2023 - ]: Procedure

  1. INSTALL NO. 2 ECM BRACKET 
    1. Install the No. 2 ECM bracket to the ECM with the 2 screws.

      Torque: 4.5 N.m (46 kgf/cm, 40 in.lbf) 

      NOTE:

      If the ECM has been struck or dropped, replace it.

  2. INSTALL NO. 1 ECM BRACKET 
    1. Install the No. 1 ECM bracket to the ECM with the 2 screws.

      Torque: 4.5 N.m (46 kgf/cm, 40 in.lbf) 

      NOTE:

      If the ECM has been struck or dropped, replace it.

  3. INSTALL ECM 
    1. Install the ECM with the nut and bolt.

      Torque: 8.0 N.m (82 kgf/cm, 71 in.lbf) 

      NOTE:

      If the ECM has been struck or dropped, replace it.

    2. Connect the 3 connectors to the ECM and push down the lever to lock it.
      GTY817548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY 

    Refer to INSTALLATION [10/2020 - ]

  5. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 

    Refer to INSTALLATION [10/2023 - ]

  6. PERFORM VEHICLE IDENTIFICATION NUMBER (VIN) REGISTRATION 

    Refer to REGISTRATION [12/2017 - ]

  7. ECU CONFIGURATION 

    Refer to ECU CONFIGURATION [10/2023 - ]

  8. UPDATE ECU SECURITY KEY 

    Refer to UPDATE ECU SECURITY KEY [10/2023 - ]

  9. INITIALIZATION AFTER RECONNECTING BATTERY TERMINAL 

    Refer to WORK PROCEDURE [10/2023 - ]

    HINT: 

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

    Refer to AUTOMATIC LEARNING CHART [10/2023 - ]