AUTOMATIC TRANSMISSION SYSTEM HYDRAULIC TEST


  1. PERFORM HYDRAULIC TEST

    CAUTION:


    • B002E88

    • Do not perform a stall test if there are any people or objects near the vehicle.

    • The vehicle could begin moving suddenly, resulting in a serious accident.


    • B002ELD

    • Do not perform a stall test if any wheel chocks are out of position.

    • The vehicle could begin moving suddenly, resulting in a serious accident.


    • B002CHO

    • Do not perform the stall test on a slippery or low-friction surface that could allow the tires to spin.

    • The vehicle could begin moving suddenly, resulting in a serious accident.

    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 the exhaust pipe.

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

    • Perform this test with the A/C off.

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

    • When performing the stall speed test more than once, make sure to wait 15 seconds or more between tests.


    1. Measure the line pressure.


      1. Warm up the ATF.

      2. A01QAV0C02
        *a Test Plug

        Remove the test plug on the center of the right side of the transmission case side and connect SST.

        SST
        09993-19015   ( 09993-00010, 09993-00040 )

      3. Fully apply the parking brake and chock all 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

        350 to 450 kPa

        (3.5 to 4.6 kgf/cm2, 50 to 66 psi)

        400 to 450 kPa

        (4.0 to 4.6 kgf/cm2, 58 to 66 psi)
        Stall test

        1600 to 1750 kPa

        (16.3 to 17.9 kgf/cm2, 232 to 254 psi)

        1600 to 1750 kPa

        (16.3 to 17.9 kgf/cm2, 232 to 254 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