AUTOMATIC TRANSAXLE SYSTEM HYDRAULIC TEST


  1. PERFORM HYDRAULIC TEST


    1. A01CBXQE02

      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 5 seconds.


      1. Warm up the ATF:

      2. Remove the test plug on the front side of the transaxle case and connect SST.

        SST
        09992-00095   ( 09992-00231, 09992-00271 )
      3. Fully apply the parking brake and chock the 4 wheels.

      4. Connect the Intelligent tester to the DLC3.

      5. Start the engine and check idling speed.

      6. Keep your left foot pressing firmly on the brake pedal and shift into D position.

      7. Measure the line pressure when the engine is idling.

      8. Depress the accelerator pedal all the way down. Quickly read the highest line pressure when engine speed reaches stall speed.

      9. In the same way, do the test in R position.

        Specified line pressure:
        Condition

        D position kPa (kgf/cm2, psi)

        R position kPa (kgf/cm2, psi)

        Idling

        372 to 412 kPa

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

        672 to 742 kPa

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

        Stall test

        931 to 1031 kPa

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

        1768 to 1968 kPa

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

        Evaluation:
        Problem Possible cause
        If the measured values at all positions are higher
        • Line pressure control solenoid (SLT) defective

        • Regulator valve detective

        If the measured values at all positions are lower
        • Line pressure control solenoid (SLT) defective

        • Regulator valve detective

        • Oil pump defective

        • U/D (Underdrive) direct clutch defective

        If pressure is low in the D position only
        • D position circuit fluid leak

        • Forward clutch defective

        If pressure is low in the R position only
        • R position circuit fluid leak

        • Direct clutch defective

        • 1st and reverse brake defective