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Hydraulic Test

  1. MEASURE LINE PRESSURE 
    CAUTION: The line pressure test should always be carried out with at least 2 people. One person should observe the condition of wheels and wheel chocks while the other is performing the test.
    NOTE:
    • Perform a test at the normal operating ATF (Automatic Transmission Fluid) temperature: 60 to 110°C (140 to 230°F)
    • Be careful to prevent the SST hose from interfering with the exhaust pipe.
    • This check must be conducted after checking and confirming that the engine is normal.
    • Perform the test with the A/C off.
    • Do not perform the stall test for longer than 5 seconds.
      Fig 1: Measuring Line Pressure
      G04948272Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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) 

    3. Fully apply the parking brake and chock the 4 wheels
    4. Start the engine and check the idle 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. Measure the line pressure again with the shift lever in R

      Specified Line Pressure 

      SPECIFIED LINE PRESSURE

      Condition O Position kPa (kgf/cm2 , psi) R Position kPa (kgf/cm2 , psi)
      Idling 365 to 435 kPa (3 7 to 4 4 kgf/cm2 , 53 to 63 psi) 375 to 445 kPa (3 8 to 4 5 kgf/cm2 , 54 to 65 psi)
      Stall test 1410 to 1610 kPa (14 4 to 16 4 kgf/cm2 , 205 to 234 psi) 1500 to 1700 kPa (15 3 to 17 3 kgf/cm2 , 218 to 247 psi)

      Evaluation 

      PROBLEM AND POSSIBLE CAUSE

      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 in D only
      • D position circuit fluid leak
      • C1 clutch defective
      Pressure is low when shift lever is in R only
      • R position circuit fluid leak
      • C4 clutch defective
      • B2 brake defective
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