2018 Lexus LS 500 Base, AWDFACTORY OEM SERVICE PROCEDURE

Removal [12/2017 - ]: Procedure

  1. REMOVE V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 11 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 11 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 11 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 11 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 11 [10/2023 - ]

  2. REMOVE RADIATOR COVER PLATE 

    Refer to PROCEDURE - Step 9 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 9 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 9 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 9 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 9 [10/2023 - ]

  3. REMOVE UPPER RADIATOR SUPPORT SEAL 

    Refer to PROCEDURE - Step 8 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 8 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 8 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 8 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 8 [10/2023 - ]

  4. REMOVE LOWER RADIATOR AIR DEFLECTOR 

    Refer to PROCEDURE - Step 10 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 10 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 10 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 10 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 10 [10/2023 - ]

  5. REMOVE ENGINE COOLANT TEMPERATURE SENSOR 
    1. Disconnect the engine coolant temperature sensor connector.
      GTY836539Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the clip and engine coolant temperature sensor from the water inlet assembly.
      GTY817305Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

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

    3. Remove the gasket from the engine coolant temperature sensor.
  6. REMOVE E.F.I. ENGINE COOLANT TEMPERATURE SENSOR 
    1. for Front:
      1. Disconnect the E.F.I. engine coolant temperature sensor connector.
        GTY817557Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Using SST, remove the E.F.I. engine coolant temperature sensor.
        GTY805241Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • SST: 09817-33191 
        NOTE:

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

      3. Remove the gasket from the E.F.I. engine coolant temperature sensor.
    2. for Rear:
      1. Remove the cowl top ventilator louver sub-assembly.

        Refer to REMOVAL [12/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

      2. Disconnect the E.F.I. engine coolant temperature sensor connector.
        GTY817554Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Using SST, remove the E.F.I. engine coolant temperature sensor.
        GTY788295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • SST: 09817-33191 
        NOTE:

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

      4. Remove the gasket from the E.F.I. engine coolant temperature sensor.
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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.