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Hydraulic Test

  1. PERFORM HYDRAULIC TEST 
    1. 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 sure to prevent SST hose from interfering with the exhaust pipe.
      • This check must be conducted after checking and adjusting the engine.
      • Perform the test when the A/C is OFF.
      • When conducting the stall test, do not continue for more than 5 seconds.
      1. Warm up the ATF (Automatic Transmission Fluid).
      2. Lift the vehicle up.
      3. Remove the engine under cover.
      4. Connect the intelligent tester to the DLC3.
      5. Remove the test plug on the transaxle case front left side and install the SST.

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

        Fig 1: Identifying SST
        G04976606Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      6. Start the engine.
      7. Shift to the D position, and then use the intelligent tester to hold 3rd gear using active test. Measure the line pressure while the engine is idling.

        Specified line pressure: 

        LINE PRESSURE SPECIFICATION

        Condition D position kPa (kgf/cm2 , psi)
        Idling 362 to 412 kPa (3.7 to 4.2 kgf/cm2 , 52 to 60 psi)
      8. Turn the engine switch off.
      9. Disconnect the connector of the TCM.

        HINT:

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

        Fig 2: Identifying TCM Connector
        G05249401Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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: 

        LINE PRESSURE SPECIFICATION

        Condition D position kPa (kgf/cm2 , psi)
        Stall test 1,160 to 1,350 kPa (11.8 to 13.8 kgf/cm2 , 168 to 196 psi)
      12. Turn the engine switch off.
      13. Connect the TCM 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: 

        LINE PRESSURE SPECIFICATION

        Condition R position kPa (kgf/cm2 , psi)
        Idling 806 to 916 kPa (8.2 to 9.3 kgf/cm2 , 117 to 133 psi)
        Stall test 1,890 to 2,000 kPa (19.3 to 20.4 kgf/cm2 , 274 to 290 psi)
      14. Remove the SST, and install the test plug.
      15. Clear the DTC.

        Evaluation: 

        EVALUATION CHART

        Problem Possible cause
        Measured values are higher than the specified value in all positions
        • Shift solenoid valve (SLT) defective
        • Regulator valve defective
        Measured values are lower than the specified value in all positions
        • Shift solenoid valve (SLT) defective
        • Regulator valve defective
        • Oil pump defective
        Pressure is low in the D position only
        • D position circuit fluid leak
        • Clutch No. 1 (C1 ) defective
        Pressure is low in the R position only
        • R position circuit fluid leak
        • Brake No. 2 (B2 ) defective
        • Brake No. 3 (B3 ) defective
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