СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ ПРОВЕРКА МАГИСТРАЛЬНОГО ДАВЛЕНИЯ


  1. PERFORM HYDRAULIC TEST


    1. A01FF04E01

      Measure the line pressure.

      CAUTION:

      The line pressure test should always be carried out with at least 2 people. One person should observe the condition of wheels and wheel chocks while the other is performing the test.

      Note


      • Perform this test with the ATF (Automatic Transmission Fluid) at the normal operating temperature: 50 to 80°C (122 to 176°F)

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

      • This check must be conducted after checking and confirming that the engine is normal.

      • Perform this test with the air conditioning and headlights off.

      • Do not perform the stall test for longer than 5 seconds.


      1. Warm up the ATF.

      2. Remove the test plug from 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 idle 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. Measure the line pressure again with the shift lever in R.

        Specified Line Pressure
        Condition

        D Position kPa (kgf/cm2, psi)

        R Position kPa (kgf/cm2, psi)
        Idling

        360 to 440 kPa

        (3.6 to 4.5 kgf/cm2, 52 to 64 psi)

        360 to 440 kPa

        (3.6 to 4.5 kgf/cm2, 52 to 64 psi)
        Stall test

        1450 to 1650 kPa

        (14.8 to 16.9 kgf/cm2, 210 to 240 psi)

        1390 to 1590 kPa

        (14.1 to 16.3 kgf/cm2, 201 to 231 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
        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

        • C4 clutch defective

        • B2 brake defective