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Home >> Toyota >> 2020 >> Highlander L, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Engine Control System (T24A-FTS) - Service Information) >> VACUUM SWITCHING VALVE (for Engine Mounting) >> Inspection [10/2022 - ] >> Procedure

Inspection [10/2022 - ]: Procedure

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  1. INSPECT NO. 1 VACUUM SWITCHING VALVE ASSEMBLY (for Active Control Engine Mount System) 
    1. Measure the resistance.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        1 (+B) - 2 (ACM) 20°C (68°F) 37 to 44 Ω
        1 (+B) - Body ground 10 kΩ or higher
        2 (ACM) - Body ground 10 kΩ or higher
        GTY1108093Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Component without harness connected
        (No. 1 Vacuum Switching Valve Assembly (for Active Control Engine Mount System))

        If the result is not as specified, replace the No. 1 vacuum switching valve assembly (for active control engine mount system).

    2. Check the operation of the No. 1 vacuum switching valve assembly (for active control engine mount system).
      1. Using a vacuum pump, apply a vacuum of 67 kPa (503 mmHg, 19.8 in. Hg) to port (F) and check that the vacuum is maintained.

        OK

        Vacuum pressure holds.

        If the result is not as specified, replace the No. 1 vacuum switching valve assembly (for active control engine mount system).

        GTY1077044Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Port (F)
      2. Check that air flows from port (E) to port (G).

        Standard

        Air flows from port (E) to port (G).

        If the result is not as specified, replace the No. 1 vacuum switching valve assembly (for active control engine mount system).

        GTY1077434Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Port (E)
        *b Port (G)
        *c Air
      3. Apply battery voltage to the terminals and check that air flows from port (E) to port (F).

        Standard

        Air flows from port (E) to port (F).

        If the result is not as specified, replace the No. 1 vacuum switching valve assembly (for active control engine mount system).

        GTY1077019Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Port (E)
        *b Port (F)
        *c Air