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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 5 seconds.
    1. Warm up the ATF.
    2. Remove the test plug on the transmission case center right side and connect SST.

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

      Fig 1: Measuring Line Pressure With SST
      G05289521Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.
    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.

      Specified line pressure: 

      SPECIFIED LINE PRESSURE

      Condition Shift Lever on D Shift Lever on R
      Idling 355 to 425 kPa (3.6 to 4.3 kgf/cm2 , 52 to 62 psi) 631 to 731 kPa (6.4 to 7.5 kgf/cm2 , 92 to 106 psi)
      Stall 1,277 to 1,387 kPa (13.0 to 14.1 kgf/cm2 , 185 to 201 psi) 1,462 to 1,670 kPa (14.9 to 17.0 kgf/cm2 , 212 to 242 psi)

      Evaluation: 

      POSSIBLE CAUSES 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
      • O/D 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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