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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 with the ATF at the normal operating ATF temperature: 50 to 80°C (122 to 176°F).
    • Be careful to prevent the hose of SST 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.
    Fig 1: Checking Line Pressure Test
    G06191129Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Warm up the ATF.
    2. Remove the test plug from the center of the right side of the transmission case 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.
    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 line pressure test again with the shift lever in R.

    Specified Line Pressure 

    SHIFT LEVER CONDITION CHART

    Condition Shift Lever in D Shift Lever in R
    Idling 360 to 440 kPa (3.7 to 4.5 kgf/cm2 , 52 to 64 psi) 360 to 440 kPa (3.7 to 4.5 kgf/cm2 , 52 to 64 psi)
    Stall 1,470 to 1,660 kPa (15.0 to 16.9 kgf/cm2 , 213 to 241 psi) 1,560 to 1,750 kPa (15.9 to 17.8 kgf/cm2 , 226 to 254 psi)

    Evaluation 

    POSSIBLE CAUSE 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
    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
    • C3 clutch defective
    • B4 brake defective
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