On-Vehicle Inspection [10/2022 - ]: Procedure

WARNING: This page is about a different car, the 2025 Toyota Highlander, 2024 Toyota Highlander, and 2023 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS
1. Check that there is no damage and cracks on the hoses and gaskets, and that there are no air or oil leaks from connections.
  HINT:
  
  Cracked hoses and gaskets or loose connections may cause the engine to run improperly or stall.

INSPECT TURBOCHARGER SUB-ASSEMBLY

NOTE:

Perform this procedure in a safe location with another person.

Start the engine and warm it up.

Fully accelerate the vehicle with the shift lever in 2nd and measure the boost pressure when the engine speed is 4500 rpm (approximately 50 km/h (31 mph).

Powertrain > Engine > Data List

Tester Display
Boost Pressure Sensor

Standard Pressure

120 kPa or higher (1.2 kgf/cm² , 2.1 psi)

If the result is not as specified, check the waste gate valve actuator with bracket assembly and turbocharger sub-assembly.

INSPECT WASTE GATE VALVE ACTUATOR

Remove the No. 1 turbo insulator.
Refer to REMOVAL [10/2022 - ]

Using a vacuum pump, apply a vacuum of 35 +/- 4.0 kPa (263 +/- 35 mmHg, 10 +/- 1.2 in.Hg) to the diaphragm chamber and check that the waste gate valve actuator link operates as shown in the illustration.

Check that the waste gate valve actuator link operates as shown in the illustration.

NOTE:

Do not apply a vacuum of 65 kPa (488 mmHg, 19 in.Hg) or more to the waste gate valve actuator as doing so may damage the diaphragm.

HINT:

If the result is not as specified, check the waste gate valve actuator with bracket assembly and turbocharger sub-assembly.

*a	Link Position When Vacuum of 35 +/- 4.0 kPa (263 +/- 35 mmHg, 10 +/- 1.2 in.Hg) Applied
*b	Link Position When No Vacuum Applied 0 kPa (0 mmHg, 0 in.Hg)