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Hydraulic Test

  1. MEASURE LINE PRESSURE 
    NOTE:
    • Perform the test at the normal operating ATF temperature: 50 to 80°C (122 to 176°F).
    • The line pressure test should always be performed with at least 2 people. One person should observe the condition of the wheels or wheel chocks while the other is performing the test.
    • Be careful to prevent SST's hose from interfering with the exhaust pipe.
    • This test must be performed after checking and adjusting the engine.
    • Perform the test with the A/C OFF.
    • When conducting the stall test, do not continue for more than 10 seconds.
    Fig 1: Measuring Line Pressure
    G05387957Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Warm up the ATF.
    2. Remove the test plug on the transaxle case center right side and connect SST.

      SST 09992-00095 (09992-00231, 09992-00271) 

    3. Fully apply the parking brake and chock the 4 wheels.
    4. Start the engine and check the idling speed.
    5. Keep your left foot firmly on the brake pedal and move the shift lever to D position.
    6. Measure the line pressure when the engine is idling.
    7. Depress the accelerator pedal as much as possible with your right foot. Quickly read the highest line pressure reading when the engine speed reaches stall speed.
    8. Perform the measure line pressure test again with the shift lever on R position.

      Specified line pressure: 

      SPECIFIED LINE PRESSURE

      Conditions D position kPa (kgf/cm2 , psi) R position kPa (kgf/cm2 , psi)
      Idling 372 to 412 kPa (3.8 to 4.2 kgf/cm2 , 54 to 60 psi) 672 to 742 kPa (6.9 to 7.6 kgf/cm2 , 97 to 108 psi)
      Stall 931 to 1,031 kPa (9.5 to 10.5 kgf/cm2 , 135 to 150 psi) 1,768 to 1,968 kPa (18.0 to 20.0 kgf/cm2 , 256 to 285 psi)

      Evaluation: 

      PROBLEM SYMPTOM CHART

      Problem Possible Cause
      Measured values at all positions are higher than specified
      • Shift solenoid valve SLT defective
      • Regulator valve defective
      Measured values at all positions are lower than specified
      • Shift solenoid valve SLT defective
      • Regulator valve defective
      • Oil pump defective
      • U/D (underdrive) direct clutch defective
      Pressure is low when shift lever is on D only
      • D position circuit fluid leak
      • Forward clutch defective
      Pressure is low when shift lever is on R only
      • R position circuit fluid leak
      • Direct clutch defective
      • 1st and reverse brake defective
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