СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ ПРОВЕРКА МАГИСТРАЛЬНОГО ДАВЛЕНИЯ


  1. MEASURE LINE PRESSURE

    A01J6IAE04

    Note


    • Perform the test 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.


    1. Warm up the ATF.

    2. Remove the test plug from the front 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 measure line pressure test again with the shift lever on R.

      Specified line pressure:
      Condition Shift Lever on D Shift Lever on R
      Stall

      1050 to 2000 kPa

      (10.7 to 20.4 kgf/cm2, 152 to 290 psi)

      1300 to 1650 kPa

      (13.3 to 16.8 kgf/cm2, 189 to 239 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

      • O/D direct clutch defective
      Pressure is low when shift lever is on D only

      • D position circuit fluid leak

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

      • R position circuit fluid leak

      • Direct clutch defective

      • 1st and reverse brake defective