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HOMESERVICE MANUALSTOYOTA20254RUNNER SR5, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE CONTROL SYSTEM - SERVICE INFORMATIONVACUUM SWITCHING VALVE (FOR ENGINE MOUNTING)INSPECTION [12/2024 - ]PROCEDURE
2025 Toyota 4Runner SR5, RWD

Inspection [12/2024 - ]: Procedure

2025 Toyota 4Runner SR5, RWDSECTION Procedure
  1. INSPECT VACUUM SWITCHING VALVE 
    1. Measure the resistance.
      1. Measure the resistance according to the value(s) in the table below.
        GTY1275890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Component without harness connected
        (Vacuum Switching Valve)

        Standard Resistance

        Tester Connection Condition Specified Condition Result
        1 (+B) - 2 (ACM) 20°C (68°F) 37 to 44 Ω Ω
        1 (+B) - Body ground Always 10 kΩ or higher kΩ
        2 (ACM) - Body ground Always 10 kΩ or higher kΩ
    2. Check the vacuum switching valve operation.
      GTY1274296Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Port (F)
      *b Port (E)
      *c Air filter
      1. Apply negative pressure of 67 kPa (500 mmHg, 19.7 in.Hg) absolute pressure to port (F).
      2. Check air flows from port (E) to the air filter.
      3. Apply auxiliary battery voltage across the terminals.
        GTY1272938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Port (F)
        *b Port (E)
      4. Check air flows from port (E) to port (F).
    3. If the result is not as specified, replace the vacuum switching valve.
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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.