AUTOMATIC TRANSMISSION SYSTEM HYDRAULIC TEST


  1. MEASURE LINE PRESSURE

    A001B42E01
    *1 Test Plug

    Note


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

    • The line pressure test should always be performed with at least 2 people. One person should observe the condition of the wheels or wheel chocks while the other is performing the test.

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

    • This test must be performed after checking and adjusting the engine.

    • Perform the test with the A/C OFF and headlight OFF.

    • When conducting the stall speed test, do not continue for more than 5 seconds.


    1. Warm up the ATF.

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

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

    3. Fully apply the parking brake and chock the 4 wheels.

    4. Start the engine and check the idling 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. Perform the measure line pressure test again with the shift lever on R.

      Specified line pressure:
      Condition Shift Lever on D Shift Lever on R
      Idling

      360 to 440 kPa

      (3.7 to 4.5 kgf/cm2, 52 to 64 psi)

      360 to 440 kPa

      (3.7 to 4.5 kgf/cm2, 52 to 64 psi)
      Stall

      1,470 to 1,660 kPa

      (15.0 to 16.9 kgf/cm2, 213 to 241 psi)

      1,560 to 1,750 kPa

      (15.9 to 17.8 kgf/cm2, 226 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 on D only

      • D position circuit fluid leak

      • Forward multiple clutch (C1) defective
      Pressure is low when shift lever is on R only

      • R position circuit fluid leak

      • Reverse clutch (C4) defective

      • No. 2 brake (B2) defective