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Hydraulic Test

  1. PERFORM HYDRAULIC TEST 
    1. Measure the line pressure.
      NOTE:
      • Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature of 50° to 80°C (122° to 176°F).
      • The line pressure test should always be carried out in pairs. One technician should observe the condition of the wheels or wheel stoppers outside the vehicle while the other is doing the test.
      • Be careful to prevent the SST hose from interfering with the exhaust pipe.
      • This check must be conducted after checking and adjusting the engine.
      • Perform with the A/C OFF.
      • Do not conduct stall tests for longer than 5 seconds continuously.
      1. Warm up the ATF.
        Fig 1: Measuring Line Pressure With SST
        G04963197Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Lift the vehicle up.
      3. Remove the test plug on the transmission case center right side and connect SST.

        SST 09992-00095 (09992-00151, 09992-00271) 

      4. Fully apply the parking brake and chock the 4 wheels.
      5. Start the engine and check the idling speed.
      6. Keep your left foot pressing firmly on the brake pedal and shift into the D position.
      7. Measure the line pressure while the engine is idling.
      8. Depress the accelerator pedal all the way down. Quickly read the highest line pressure when the engine speed reaches the stall speed.
      9. In the same manner, do the test in the R position.

        Specified line pressure 

        SPECIFIED LINE PRESSURE SPECIFICATION

        Condition D position R position
        Idling 356 to 426 kPa (3.6 to 4.3 kgf/cm2 , 52 to 62 psi) 500 to 600 kPa (5.1 to 6.1 kgf/cm2 , 73 to 87 psi)
        Stall test 1,367 to 1,477 kPa (14.0 to 15.1 kgf/cm2 , 198 to 214 psi) 1,278 to 1,506 kPa (13.0 to 15.4 kgf/cm2 , 185 to 218 psi)

        Evaluation: 

        PROBLEM SYMPTOMS TABLE

        Problem Possible cause
        Measured values are higher than specified in all positions
        • Shift solenoid valve SLT defective
        • Regulator valve defective
        Measured values are lower than specified in all positions
        • Shift solenoid valve SLT defective
        • Regulator valve defective
        • Oil pump defective
        Pressure is low in D position only
        • D position circuit fluid leakage
        • No. 1 clutch (C1 ) defective
        Pressure is low in R position only
        • R position circuit fluid leakage
        • No. 3 clutch (C3 ) defective
        • No. 4 brake (B4 ) defective
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