On-Vehicle Inspection [12/2024 - ]: Procedure

2025 Toyota 4Runner SR5, 4WDSECTION Procedure
  1. INSPECT VACUUM SENSOR ASSEMBLY 

    Pre-procedure1

    • Turn the ignition switch to ON.
    • Read the air pressure value from the Data List.

      Powertrain > Engine > Data List 

      Tester Display
      PCV 1 Pressure

      HINT: 

      • Standard atmospheric pressure is approximately 101 kPa (abs) (15 psi (abs)).
      • For every 100 m (328 ft.) increase in altitude, atmospheric pressure drops by approximately 1 kPa (0.15 psi). This varies by weather.
    • Using a vacuum pump, set the vacuum sensor assembly.
    • Using a vacuum pump, read the value when pressure is applied and when pressure is decreased.

      OK

      The pressure values when applying pressure or decreasing pressure using the vacuum pump and the Data List values are nearly the same.

      NOTE:
      • Do not apply a pressure of 50 kPa (0.5 kgf/cm 2 , 7.3 psi) or more to the vacuum sensor assembly.
      • Do not apply a vacuum of 50 kPa (375 mmHg, 14.8 in.Hg) or more to the vacuum sensor assembly.

      HINT: 

      The pressure value displayed in the Data List is the pressure value indicated on the vacuum pump with the air pressure value added.

      EXAMPLE:

      Vacuum Pump Pressure Value Air Pressure Value Equation Data List Value
      When vacuum is applied at 30 kPa (225 mmHg, 8.86 in.Hg) 100 kPa (1.0 kgf/cm 2 , 15 psi) -30 + 100 = 70 70 kPa (0.7 kgf/cm 2 , 10.2 psi)
      When pressure is applied at 20 kPa (0.2 kgf/cm 2 , 2.9 psi) 20 + 100 = 120 120 kPa (1.2 kgf/cm 2 , 17 psi)

    Post-procedure1

    • None
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.