AUTOMATIC TRANSMISSION SYSTEM HYDRAULIC TEST


  1. PERFORM HYDRAULIC TEST


    1. Measure the line pressure.

      A004JY3E03
      Text in Illustration
      *1 SST *2 Test Plug

      Note


      • Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 60 to 90°C (140 to 194°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.

      • Before and after the measurement, clean the gauges and hoses with non-residue solvent.


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

      2. Lift the vehicle up.

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

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

      4. Lower the vehicle.

      5. Fully apply the parking brake and check the 4 wheels.

      6. Start the engine and check idling speed.

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

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

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

      10. In the same manner, do the test in R position.

        Specified line pressure:
        Condition

        D position kPa (kgf / cm2, psi)

        R position kPa (kgf / cm2, psi)
        Idling

        350 to 430 kPa

        (3.6 to 4.4 kgf/cm2, 51 to 62 psi)

        760 to 950 kPa

        (7.7 to 9.7 kgf/cm2, 110 to 138 psi)
        Stall test

        1200 to 1380 kPa

        (12.5 to 14.0 kgf/cm2, 174 to 200 psi)

        1410 to 1630 kPa

        (14.4 to 16.6 kgf/cm2, 204 to 236 psi)
        Evaluation:
        Problem Possible cause
        If the measured values at all position are higher

        • Shift solenoid valve SLT defective

        • Regulator valve defective
        If the measured values at all position are lower

        • Shift solenoid valve SLT defective

        • Regulator valve defective

        • Oil pump defective
        If pressure is low in the D position only

        • D position circuit fluid leak

        • Clutch No.1 (C1) defective
        If pressure is low in the R position only

        • R position circuit fluid leak

        • Clutch No.3 (C3) defective

        • Brake No.4 (B4) defective