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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System (Hydraulic) - Service Information (2 Of 2) >> VACUUM PUMP (for A25A-FKS) >> On-Vehicle Inspection [08/2020 - ] >> Procedure

On-Vehicle Inspection [08/2020 - ]: Procedure

  1. OPERATION CHECK 
    1. Disconnect the No. 1 vacuum hose connector from the vacuum pump assembly.

      See step  1

    2. Connect the hose of the vacuum gauge to the vacuum pump assembly.
      GTY955887Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Vacuum Gauge
      *b Plug
    3. Start the engine and warm it up for more than 2 minutes.
    4. With the engine idling, check the vacuum of the vacuum pump assembly.

      Standard Pressure

      More than 86.7 kPa (650 mmHg, 25.6 in.Hg)

      HINT: 

      • If the pressure is less than the standard, disassemble and inspect the vacuum pump assembly. If necessary, replace the vacuum pump assembly.

        Refer to DISASSEMBLY [08/2020 - ] 

      • Always perform this operation check procedure after replacing or servicing the vacuum pump assembly.
    5. Remove the vacuum gauge from the vacuum pump assembly.
    6. Connect the No. 1 vacuum hose connector to the vacuum pump assembly.

      See step  3

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