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Installation [11/2021 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
  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) 

  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) 

  3. INSTALL ECM 
    1. Install the ECM to the engine room ECU box with the 2 nuts.

      Torque: 5.5 N.m (56 kgf/cm, 49 in.lbf) 

      NOTE:
      • Install the ECM to the engine room ECU box with the name plate facing the outside of the vehicle.
      • If the ECM has been struck or dropped, replace it.
  4. ENGAGE WIRE HARNESS 
    1. Engage the wire harness to the engine room ECU box.
    2. Engage the wire harness clamp.
    3. Connect the 6 ECM connectors and transmission control ECU assembly connector.
      NOTE:
      • When connecting the connectors, make sure that dirt, water or other foreign matter does not become stuck between the connectors and other part.
      • Be sure to securely connect the connectors.
    4. Connect the engine wire harness connector.
    5. Engage the guide and connect the connector holder to the engine room ECU box.
    6. Engage the claw.
    7. Connect the 3 engine wire harness connectors (B).
      GTY1084158Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Connect the engine wire harness connector (A) as shown in the illustration.
  5. INSTALL ENGINE ROOM ECU COVER 
    1. Install the engine room ECU cover with the 3 bolts.

      Torque: 5.5 N.m (56 kgf/cm, 49 in.lbf) 

      NOTE:

      Make sure that the wire harness does not get caught between the parts.

  6. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
    NOTE:

    When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

    Refer to INITIALIZATION [11/2021 - 09/2022] , or refer to INITIALIZATION [09/2022 - 10/2023] , or refer to INITIALIZATION [10/2023 - ]

  7. PERFORM INITIALIZATION 

    Refer to INITIALIZATION [11/2021 - 09/2022] , or refer to INITIALIZATION [09/2022 - 10/2023] , or refer to INITIALIZATION [10/2023 - ]

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