LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2021 >> Ascent Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> CVT Transaxle System >> Secondary Pressure Test >> Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Secondary Pressure Test: Inspection

WARNING: During the secondary pressure test, confirm safety in the vicinity and make sure no person is around the vehicle.
CAUTION: Vehicle components are extremely hot immediately after driving. Be wary of receiving burns from heated parts.
  1. Check the engine oil level. Ref. to LUBRICATION (H4DOTC)>Engine Oil>INSPECTION .
  2. Check the engine coolant level. Ref. to COOLING (H4DOTC)>Engine Coolant>INSPECTION .
  3. Remove the front wheel RH. Ref. to WHEEL AND TIRE SYSTEM>Tire and Wheel>REMOVAL .
  4. Remove the test plug (secondary pressure), and install ST1, ST2 and ST3.
    CAUTION:
    • Due to flowing out of CVTF, quickly install the ST1, ST2 and ST3.
    • Be careful when setting the tool so that the ST3 does not touch the exhaust pipe.
    NOTE:
    • Use the ST2 with genuine O-ring (part No. 806911080) attached.
    • Prepare the container for draining of engine oil.

    Preparation tool: 

    ST1: OIL PRESSURE GAUGE ASSY (18801AA000)

    ST2: PRESSURE GAUGE ADAPTER (18681AA000)

    ST3: OIL PRESSURE ADAPTER SET (498897700)

    G09481925Courtesy of SUBARU OF AMERICA, INC.
    G13621872Courtesy of SUBARU OF AMERICA, INC.
  5. Set the gauge so that it can be seen from the driver's seat.
  6. Connect the Subaru Select Monitor.
  7. Turn the ignition switch to ON. (Engine OFF)
  8. Display [ATF Temp.].
  9. Turn off all systems causing an electrical load, such as headlights, A/C, seat heater and rear defogger.
  10. Apply the parking brake.
  11. Start the engine.
  12. Turn OFF the pre-collision brake function.
  13. Check the CVTF level. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>CVTF>INSPECTION .
  14. Warm up until [ATF Temperature] reaches to 60 - 80 °C (140 - 176 °F).
  15. Install the front wheel RH. Ref. to WHEEL AND TIRE SYSTEM>Tire and Wheel>INSTALLATION .
  16. Place wheel chocks at the front and rear of all wheels.
  17. Shift the select lever to "D range".
    NOTE: This procedure is necessary for correct measurement.
  18. Shift the select lever to "P range".
  19. Record the secondary pressure with the engine idling.

    Specification: 

    0.3 - 1.5 MPa (3.1 - 15.3 kgf/cm2 , 44 - 218 psi)

  20. Shift the select lever to "D range".
  21. Depress the accelerator pedal to the full while fully depressing the brake pedal with your left foot.
    CAUTION: Do not perform this procedure for over 5 seconds at a time.
  22. When the engine speed stabilizes, quickly record the secondary pressure and release the accelerator pedal.

    Specification: 

    4.5 - 6.0 MPa (45.9 - 61.2 kgf/cm2 , 652 - 870 psi)

  23. Shift the select lever to "N range", and idle the engine for one minute or more.
  24. Shift the select lever to "R range" and perform the secondary pressure test in the same manner.

    Specification: 

    4.5 - 6.0 MPa (45.9 - 61.2 kgf/cm2 , 652 - 870 psi)

  25. Remove the front wheel RH. Ref. to WHEEL AND TIRE SYSTEM>Tire and Wheel>REMOVAL .
  26. Remove the STs (OIL PRESSURE GAUGE ASSY, PRESSURE GAUGE ADAPTER and OIL PRESSURE ADAPTER SET), and then install the test plug (secondary pressure) using a new O-ring.
    CAUTION: Because the CVTF will flow out, install the test plug (secondary pressure) quickly.
    NOTE: Apply CVTF to the O-rings.

    Tightening torque: 

    25 N.m (2.5 kgf-m, 18.4 ft-lb)

  27. Check the CVTF level. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>CVTF>INSPECTION .
  28. Install the front wheel RH. Ref. to WHEEL AND TIRE SYSTEM>Tire and Wheel>INSTALLATION .
scientia non olet · About LEMON Manuals