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HOMESERVICE MANUALSTOYOTA2025SEQUOIA CAPSTONEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 47 (ENGINE CONTROL SYSTEM (2GR-FSE) - SERVICE INFORMATION)ECMINSTALLATION [10/2015 - 11/2017]PROCEDURE
2025 Toyota Sequoia Capstone

Installation [10/2015 - 11/2017]: Procedure

2025 Toyota Sequoia CapstoneSECTION Procedure
WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. 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.
      GTY519076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Engage the wire harness clamp.
    3. for AA81E:
      1. Connect the transmission control ECU assembly connector.
    4. Engage the wire harness to the engine room ECU box and connect the 6 ECM connectors.
      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 ECM connectors.
    5. Engage the guide and connect the connector holder to the engine room ECU box.
    6. Engage the claw.
    7. Connect the 2 engine wire harness connectors (B).
      GTY512056Courtesy 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 [10/2015 - 11/2017]

  7. PERFORM INITIALIZATION 

    Refer to INITIALIZATION [10/2015 - 11/2017]

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.