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Hydraulic Test

  1. MEASURE LINE PRESSURE 
    CAUTION: 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.
    NOTE:
    • Perform the test at the normal operating ATF temperature: 80 to 120°C (176 to 248°F).
    • 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 and headlights OFF.
    • When conducting the stall speed 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
      G04948272Courtesy 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: 

      LINE PRESSURE SPECIFICATION

      Condition Shift Lever on D Shift Lever on R
      Idling 365 to 435 kPa (3.7 to 4.4 kgf/cm2 , 53 to 63 psi) 365 to 435 kPa (3.7 to 4.4 kgf/cm2 , 53 to 63 psi)
      Stall 1,410 to 1,610 kPa (14.4 to 16.4 kgf/cm2 , 205 to 234 psi) 1,500 to 1,700 kPa (15.3 to 17.3 kgf/cm2 , 218 to 247 psi)

      Evaluation: 

      POSSIBLE CAUSE REFERENCE

      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
      Pressure is low when shift lever is on D only
      • D position circuit fluid leak
      • C1 clutch defective
      Pressure is low when shift lever is on R only
      • R position circuit fluid leak
      • C3 clutch defective
      • B4 brake defective
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