СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ ПРОВЕРКА МАГИСТРАЛЬНОГО ДАВЛЕНИЯ

Информация добавлена 08-08-2017


  1. PERFORM HYDRAULIC TEST


    1. Measure the line pressure.

      CAUTION:

      The line pressure test should always be carried out in pairs. One technician should observe the conditions of the wheels and wheel stoppers from outside the vehicle while the other is performing the test.

      Note


      • Perform the test while the ATF (Automatic Transmission Fluid) temperature is 50 to 80°C (122 to 176°F).

      • Be careful to prevent SST hose from interfering with the exhaust pipe.

      • This check must be conducted 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 5 seconds.


      1. Warm up the ATF (Automatic Transmission Fluid).

      2. Turn the engine switch off.

      3. Lift the vehicle up.

      4. A01A5SDE01

        Remove the test plug from the transmission case and connect SST.

        SST
        09992-00095   ( 09992-00231, 09992-00271 )
      5. Lower the vehicle.

      6. Fully apply the parking brake and chock the 4 wheels.

      7. Start the engine and check the idling speed.

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

      9. Fully depress the accelerator pedal with your right foot. Quickly read the highest line pressure when the engine speed reaches stall speed.

      10. In the same manner, perform the test with the shift lever in R.

        Specified Line Pressure
        Condition D Position R Position
        Stall test

        1200 to 1450 kPa

        (12.2 to 14.8 kgf/cm2, 174 to 210 psi)

        1150 to 1400 kPa

        (11.7 to 14.3 kgf/cm2, 167 to 203 psi)

        Evaluation
        Problem Possible Cause
        Measured values at all positions are higher than specified pressure
        • Shift solenoid valve SLT defective

        • Regulator valve defective

        Measured values at all positions are lower than specified pressure
        • Shift solenoid valve SLT defective

        • Regulator valve defective

        • Oil pump defective

        Pressure is low in D only
        • D position circuit fluid leak

        • Clutch No. 1 (C1) defective

        Pressure is low in R only
        • R position circuit fluid leak

        • Clutch No. 3 (C3) defective

        • Brake No. 4 (B4) defective