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Power Steering Fluid: Inspection

  1. CHECK FLUID LEVEL 
    Fig 1: Checking Fluid Level
    G02901510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Keep the vehicle level.
      2. NOTE:

      Check that the fluid level is within the HOT LEVEL range on the reservoir/reservoir cap dipstick.

      If the fluid is cold, check that it is within the COLD LEVEL range.

    2. With the engine stopped, check the fluid level in the oil reservoir.

      If necessary, add fluid.

      1. Fluid: ATF DEXRON® II or III 
    3. Start the engine and run it at idle.
    4. Turn the steering wheel from lock to lock several times to boost fluid temperature.
      1. Fluid temperature: 80°C (176°F) 
    5. Check for foaming or emulsification.

      If there is foaming or emulsification, bleed power steering system (See BLEEDING ).

      Fig 2: Checking For Foaming Or Emulsification
      G02901511Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. With the engine idling, measure the fluid level in the oil reservoir.
      Fig 3: Measuring Fluid Level In Oil Reservior
      G02901512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Stop the engine.
    8. Wait a few minutes and remeasure the fluid level in the oil reservoir.
      1. Maximum fluid level rise: 5 mm (0.20 in.) 

      If a problem is found, bleed power steering system (See BLEEDING ).

    9. Check the fluid level.
  2. CHECK STEERING FLUID PRESSURE 
    1. 5VZ-FE engine:
      1. Remove the air cleaner assembly (See step 1 of REMOVAL ).
    2. 2UZ-FE engine:
      1. Remove the air cleaner assembly with air cleaner hose (See step 1 of REMOVAL ).
    3. Disconnect the pressure feed tube from the PS vane pump.
      1. (5VZ-FE engine: See step 4 of REMOVAL ).
      2. (2UZ-FE engine: See step 5 of REMOVAL ).
      4. CAUTION: Check that the valve of the SST is in the open position.
      Fig 4: Checking Steering Fluid Pressure With SST
      G02901513Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Connect SST, as shown in Fig 4.
      1. SST 09640-10010 (09641-01010, 09641-01030, 09641-01060)
    5. Bleed the power steering system (See BLEEDING ).
    6. Start the engine and run it at idle.
    7. Turn the steering wheel from lock to lock several times to boost fluid temperature.
      1. Fluid temperature: 80 °C (176 °F) 
      8. CAUTION:
      • Do not keep the valve closed for more than 10 seconds.
      • Do not let the fluid temperature become too high.
      Fig 5: Testing System Pressure (Valve Closed)
      G02901514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. With the engine idling, close the valve of the SST and observe the reading on the SST.
      1. Minimum fluid pressure: 
      2. 8,336 kPa (85 kgf/cm 2  , 1,209 psi) 
    9. With the engine idling, open the valve fully.
      10. CAUTION: Do not turn the steering wheel.
      Fig 6: Testing System Pressure (Valve Open & Wheels Straight)
      G02901515Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    10. Measure the fluid pressure at engine speeds of 1,000 rpm and 3,000 rpm.
      1. Difference fluid pressure: 
      2. 490 kPa (5 kgf/cm 2  , 71 psi) or less 
      11. CAUTION:
      • Do not maintain lock position for more than 10 seconds.
      • Do not let the fluid temperature become too high.
      Fig 7: Testing System Pressure (Valve Open & Wheels Turned To Full Lock)
      G02901516Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. With the engine idling and valve fully opened, turn the steering wheel to full lock.
      1. Minimum fluid pressure: 
      2. 8,336 kPa (85 kgf/cm 2  , 1,209 psi) 
    12. Disconnect the SST.
      1. SST 09640-10010 (09641-01010, 09641-01030, 09641-01060)
    13. Connect the pressure feed tube.
      1. (5VZ-FE engine: See step 3 of INSTALLATION ).
      2. (2UZ-FE engine: See step 2 of INSTALLATION ).
    14. 5VZ-FE engine:

      Install the air cleaner assembly (See step 6 of INSTALLATION ).

    15. 2UZ-FE engine:
      1. Install the air cleaner assembly with air cleaner hose (See step 6 of INSTALLATION ).
    16. Bleed the power steering system (See BLEEDING ).
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