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HOMESERVICE MANUALSTOYOTA2025HIGHLANDER LIMITED, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE CONTROL SYSTEM (T24A-FTS) - SERVICE INFORMATIONENGINE COOLANT TEMPERATURE SENSORREMOVAL [10/2022 - 11/2023]PROCEDURE
2025 Toyota Highlander Limited, FWD

Removal [10/2022 - 11/2023]: Procedure

2025 Toyota Highlander Limited, FWDSECTION Procedure
  1. DRAIN ENGINE COOLANT (for Engine) 

    Refer to PROCEDURE - Step 1

  2. REMOVE ENGINE COOLANT TEMPERATURE SENSOR (for Outlet Side) 
    NOTE:

    If the engine coolant temperature sensor has been struck or dropped, replace it.

    1. GTY1076268Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE GENERATOR ASSEMBLY 

    HINT: 

    Perform this procedure only when replacement of the engine coolant temperature sensor (for Water Inlet Housing Side) is necessary.

    Refer to REMOVAL [10/2022 - 11/2023]

  4. DISCONNECT WIRE HARNESS 

    HINT: 

    Perform this procedure only when replacement of the engine coolant temperature sensor (for Water Inlet Housing Side) is necessary.

    1. GTY1077400Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. DISCONNECT NO. 2 INTERCOOLER COOLING WATER PIPE 

    HINT: 

    Perform this procedure only when replacement of the engine coolant temperature sensor (for Water Inlet Housing Side) is necessary.

    1. GTY1106510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. DISCONNECT NO. 1 INTERCOOLER COOLING WATER PIPE 

    HINT: 

    Perform this procedure only when replacement of the engine coolant temperature sensor (for Water Inlet Housing Side) is necessary.

    1. GTY1106522Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. REMOVE ENGINE COOLANT TEMPERATURE SENSOR (for Water Inlet Housing Side) 
    NOTE:

    If the engine coolant temperature sensor has been struck or dropped, replace it.

    1. GTY1076275Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. REMOVE INTAKE MANIFOLD WITH INTERCOOLER ASSEMBLY 

    HINT: 

    Perform this procedure only when replacement of the engine coolant temperature sensor (for Cylinder Head Side) is necessary.

    Refer to REMOVAL [10/2022 - ]

  9. REMOVE ENGINE COOLANT TEMPERATURE SENSOR (for Cylinder Head Side) 
    1. GTY1104656Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Disconnect the engine coolant temperature sensor connector.
      2. Using SST, remove the engine coolant temperature sensor from the cylinder head sub-assembly.
        • SST: 09817-33191 
        NOTE:

        If the engine coolant temperature sensor has been struck or dropped, replace it.

      3. Remove the gasket from the engine coolant temperature sensor.
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.