AUTOMATIC TRANSAXLE SYSTEM (for 1AZ-FE) HYDRAULIC TEST


  1. MEASURE LINE PRESSURE

    A00DUOOE01

    Note


    • Perform the test with the ATF 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 and 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 10 seconds.


    1. Warm up the ATF.

    2. Remove the test plug from the center of the right side of the transaxle 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.

    5. Keep your left foot firmly on the brake pedal and move the shift lever to D.

    6. 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.

    7. Perform the measure line pressure test again with the shift lever in R.

      Specified Line Pressure
      Shift Lever Position Line Pressure
      D

      931 to 1031 kPa

      (9.5 to 10.5 kgf/cm2, 135 to 150 psi)
      R

      1768 to 1968 kPa

      (18.0 to 20.0 kgf/cm2, 256 to 285 psi)
      Evaluation
      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

      • U/D (underdrive) brake defective
      Pressure is low when shift lever is in D only

      • D position circuit fluid leak

      • Forward clutch defective
      Pressure is low when shift lever is in R only

      • R position circuit fluid leak

      • Direct clutch defective

      • 1st and reverse brake defective