Replacement [08/2015 - ]: Procedure

1. Remove the engine under cover.

   Refer to PROCEDURE - Step 11 [08/2015 - 10/2016] , or refer to PROCEDURE - Step 11 [10/2016 - 09/2020] , or refer to PROCEDURE - Step 11 [09/2020 - ]

2. Install a vinyl tube to the drain cock plug (for Intercooler).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Vinyl Tube

3. Loosen the drain cock plug (for Intercooler) and drain the coolant (for Intercooler).

   HINT: 

   Collect the coolant in a container and dispose of it according to the regulations in your area.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Reserve Tank Cap (for Intercooler)
   *2	Drain Cock Plug (for Intercooler)

4. Remove the reserve tank cap (for Intercooler).
5. Tighten the drain cock plug (for Intercooler) by hand.
6. Remove the vinyl tube from the drain cock plug (for Intercooler).
7. Install the engine under cover.

   Refer to PROCEDURE - Step 79 [08/2015 - 10/2016] , or refer to PROCEDURE - Step 78 [10/2016 - 09/2020] , or refer to PROCEDURE - Step 78 [09/2020 - ]

1. When using the GTS:
   1. Slowly pour coolant into the intercooler reserve tank assembly.

      Standard Capacity

      3.0 liters (3.2 US qts, 2.6 Imp. qts)

      NOTE:

      Do not substitute plain water for coolant.

      HINT: 

      LEXUS vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damaging the engine cooling system and other technical problems, only use TOYOTA SLLC or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate coolant with long-life hybrid organic acid technology (coolant with long-life hybrid organic acid technology is a combination of low phosphates and organic acids).

   2. Connect the GTS to the DLC3.
   3. Turn the engine switch on (IG).
   4. Enter the following menus: Powertrain / Engine / Active Test / Control the Intercooler Water Pump

      Powertrain > Engine > Active Test 

      Tester Display
      Control the Intercooler Water Pump

   5. While adding coolant so that the coolant level is kept near the F line, activate the electric water pump assembly for approximately 1 minute and then stop pump operation for 1 minute. Repeat this operation approximately 3 times until the operation sound of the electric water pump assembly reduces and no more bubbles are visible in the intercooler reserve tank assembly or the coolant level in the intercooler reserve tank assembly stabilizes.

      OK

      The operation sound of the electric water pump assembly reduces and no more bubbles are visible in the intercooler reserve tank assembly or the coolant level in the intercooler reserve tank assembly stabilizes.

      HINT: 

      If the intercooler reserve tank assembly is filled excessively with coolant, coolant may spill out when the electric water pump assembly is stopped.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      *a

      F Line

   6. When no more bubbles are visible in the intercooler reserve tank assembly or the coolant level in the intercooler reserve tank assembly has stabilized, add coolant to the F line, and install the reserve tank cap (for Intercooler).
2. When not using the GTS:
   1. Slowly pour coolant into the intercooler reserve tank assembly.

      Standard Capacity

      3.0 liters (3.2 US qts, 2.6 Imp. qts)

      NOTE:

      Do not substitute plain water for coolant.

      HINT: 

      LEXUS vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damaging the engine cooling system and other technical problems, only use TOYOTA SLLC or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate coolant with long-life hybrid organic acid technology (coolant with long-life hybrid organic acid technology is a combination of low phosphates and organic acids).

   2. Install the reserve tank cap (for Intercooler). [*1]
   3. Start the engine. [*2]
   4. Operate the electric water pump assembly by running the engine at 2000 rpm or higher with the shift lever in N or P for 1 minute and then stop pump operation for 1 minute. Repeat this operation approximately 3 times until the operation sound of the electric water pump assembly reduces and no more bubbles are visible in the intercooler reserve tank assembly or the coolant level in the intercooler reserve tank assembly stabilizes. [*3]
      WARNING:

      • Be careful as the radiator hoses are hot.
      • Keep your hands away from the cooling fan.
      NOTE:

      • Make sure that the coolant level in the intercooler reserve tank assembly does not drop below the L line when the engine speed is 2000 rpm or higher.
      • Immediately after starting the engine, if the intercooler reserve tank assembly runs out of coolant, stop the engine, wait until the coolant has cooled down, and add coolant until it reaches the F line.
   5. Stop the engine and wait until the coolant has cooled down to ambient temperature. [*4]
   6. Check that the coolant level is between the F and L line.[*5]

      If the coolant level is below the L line, add coolant to the intercooler reserve tank assembly until it reaches the F line, and repeat steps from [*1] to [*5].

      If the coolant level is above the F line, drain coolant so that the coolant level is between the F and L line.

See step  1