AUTOMATIC TRANSAXLE SYSTEM HYDRAULIC TEST


  1. PERFORM HYDRAULIC TEST


    1. A017BZ4E01

      Measure the line pressure.

      Note


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

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

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

      • This Check must be conducted after checking and adjusting engine.

      • Perform under condition that A/C is OFF.

      • When conducting stall test, do not continue more than 10 seconds.


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

      2. Lift the vehicle up.

      3. Remove the engine under cover.

      4. Connect Intelligent tester to the DLC3.

      5. Remove the test plug A on the transaxle case front left side and install the SST.

        SST
        09992-00095   ( 09992-00231, 09992-00271 )

        Note

        There is a difference in installation point between D position and R position.

      6. Start the engine.

      7. Using Intelligent tester, shift to D position and hold 3rd gear by active test, and measure the line pressure in idling.

        Specified line pressure:
        Condition

        D position kPa (kgf / cm2, psi)
        Idling

        372 to 412 kPa

        (3.8 to 4.2 kgf/cm2, 54 to 60 psi)

      8. Turn the ignition switch off.

      9. A017DQ1E01

        Disconnect the connector of the transmission wire.

        Tech Tips

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

      10. Start the engine.

      11. Firmly depress the brake pedal, shift to the D position, depress the accelerator pedal all the way down and check the line pressure while the stall test is performed.

        Specified line pressure:
        Condition

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

        931 to 1031 kPa

        (9.5 to 10.5 kgf/cm2, 135 to 150 psi)

      12. Turn the ignition switch off.

      13. Remove the SST, install the test plug A.

      14. Remove the test plug B, install the SST and start engine.

        SST
        09992-00095   ( 09992-00231, 09992-00271 )

      15. Connect the transmission wire connector, depress the brake pedal firmly, shift to the R position and check that the line pressure while the engine is idling and during the stall test.

        Specified line pressure:
        Condition

        R position kPa (kgf / cm2, psi)
        Idling

        672 to 742 kPa

        (6.9 to 7.6 kgf/cm2, 97 to 108 psi)
        Stall test

        1768 to 1968 kPa

        (18.0 to 20.1 kgf/cm2, 256 to 285 psi)

      16. Remove the SST, install the test plug B.

      17. Clear the DTC.

        Evaluation:
        Problem Possible cause
        Measured values are higher than specified in all positions

        • Shift solenoid valve (SLT) defective

        • Regulator valve defective
        Measured values are lower than specified in all positions

        • Shift solenoid valve (SLT) defective

        • Regulator valve defective

        • Oil pump defective

        • U/D (Underdrive) direct clutch defective
        Pressure is low in the D position only

        • D position circuit fluid leak

        • Forward clutch defective
        Pressure is low in the R position only

        • R position circuit fluid leak

        • Reverse clutch defective

        • 1st and reverse brake defective