AUTOMATIC TRANSAXLE SYSTEM HYDRAULIC TEST


  1. PERFORM HYDRAULIC TEST


    1. A01UFAPE01

      Measure the line pressure.

      CAUTION:

      A 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 the exhaust pipe.

      • This test must be performed after checking and confirming that the engine is normal.

      • Perform this test with the air conditioning off.

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

      • When performing the stall speed test repeatedly, wait for 15 seconds or more between tests.

      • Perform this test with the AUTO function (shift-linked function) of the electronic parking brake system off.


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

      2. Lift the vehicle.

      3. Remove the engine under cover.

      4. Remove the test plug on the front left side of the transaxle case and install SST.

        SST
        09993-19015   ( 09992-00010, 09992-00040 )

      5. Lower the vehicle.

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

        Tech Tips

        When the electric parking brake switch (combination switch assembly) is pulled to the lock side 2 times (2 lock operations), the maximum amount of braking force is applied.

      7. Connect the GTS to the DLC3.

      8. Start the engine.

      9. Enter the following menus: Powertrain / ECT / Active Test / Control the Shift Position.


        Powertrain > ECT > Active Test
        Tester Display
        Control the Shift Position

      10. Move the shift lever to D, and then use the GTS to perform the Active Test and hold 3rd gear. Measure the line pressure with the engine idling.

        Specified Line Pressure
        Condition

        D Position kPa (kgf/cm2, psi)
        Idling

        50 to 400 kPa

        (0.5 to 4.1 kgf/cm2, 7 to 58 psi)

      11. Turn the engine switch off.

      12. A01UEQ5

        Disconnect the TCM connector.

        Tech Tips

        Disconnect the connector only when performing the D position stall test.

      13. Start the engine.

      14. Depress the brake pedal firmly with your left foot, move the shift lever to D, depress the accelerator pedal as much as possible with your right foot and quickly read the line pressure when the engine reaches the stall speed.

        Specified Line Pressure
        Condition

        D Position kPa (kgf/cm2, psi)
        Stall test

        800 to 1400 kPa

        (8.2 to 14.3 kgf/cm2, 116 to 203 psi)

      15. Turn the engine switch off.

      16. Connect the TCM connector.

      17. Depress the brake pedal firmly with your left foot, move the shift lever to R, and check the line pressure with the engine idling and then depress the accelerator pedal as much as possible with your right foot and quickly read the line pressure when the engine reaches the stall speed.

        Specified Line Pressure
        Condition

        R Position kPa (kgf/cm2, psi)
        Idling

        590 to 880 kPa

        (6.0 to 9.0 kgf/cm2, 86 to 128 psi)
        Stall test

        1800 to 2100 kPa

        (18.4 to 21.4 kgf/cm2, 261 to 305 psi)

      18. Remove SST and install the test plug.

      19. Clear the DTCs.

        Evaluation
        Test Result Possible Cause
        Measured values are higher than the specified value in all positions

        • Shift solenoid valve SLT malfunction

        • Regulator valve malfunction
        Measured values are lower than the specified value in all positions

        • Shift solenoid valve SLT malfunction

        • Regulator valve malfunction

        • Oil pump malfunction
        Pressure is low in D only

        • D position circuit fluid leak

        • No. 1 clutch (C1) malfunction
        Pressure is low in R only

        • R position circuit fluid leak

        • No. 2 brake (B2) malfunction

        • No. 3 brake (B3) malfunction