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On-Vehicle Inspection

  1. INSPECT DRIVE BELT 
    1. Visually check the belt for excessive wear, frayed cords, etc.

    If any defect is found, replace the drive belt.

    HINT:

    Cracks on the rib side of a belt are considered acceptable. Replace the belt if there are any missing ribs.

    Fig 1: Checking Belt Excessive Wear, Frayed Cords, ETC
    G02615202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. BLEED POWER STEERING SYSTEM 
    1. Check the fluid level.
    2. Jack up the front of the vehicle and support it with the stands.
    3. Turn the steering wheel.
      1. With the engine stopped, turn the wheel slowly from lock to lock several times.
    4. Lower the vehicle.
    5. Start the engine.
      1. Run the engine at idle for a few minutes.
    6. Turn the steering wheel.
      1. With the engine idling, turn the wheel to left or right full lock position and keep it there for 2 to 3 seconds, then turn the wheel to the opposite full lock position and keep it there for 2 to 3 seconds.
      2. Repeat (1) several times.
    7. Stop the engine.
    8. Check for foaming or emulsification.

      Especially, if the system has to be bled twice because of foaming or emulsification, check for fluid leaks in the system.

    9. Check the fluid level.
    Fig 2: Checking Fluid Level
    G02615203Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK FLUID LEVEL 
    1. Keep the vehicle level.
    2. With the engine stopped, check the fluid level in the oil reservoir.

      If necessary, add fluid.

      Fluid: ATF DEXRON® II or III 

      HINT:

      When hot, check that the fluid level is within the HOT range on the reservoir tank. If the fluid is cold, check that the fluid level is within the COLD range.

      Fig 3: Checking Fluid Level In Oil Reservoir
      G02615204Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Start the engine and run at idle.
    4. Turn the steering wheel from lock to lock several times to raise fluid temperature.

      Fluid temperature: 75 to 80°C (167 to 176°F) 

    5. Check for foaming or emulsification.

      If foaming or emulsification is identified, bleed the power steering system.

      Fig 4: Checking Foaming Or Emulsification
      G02615205Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. With the engine idling, measure the fluid level in the oil reservoir.
    7. Stop the engine.
    8. Wait a few minutes and measure the fluid level in the oil reservoir again.

      Maximum fluid level rise: 5 mm (0.20 in.) 

      If a problem is found, bleed the power steering system.

    9. Check the fluid level.
    Fig 5: Checking Fluid Level
    G02615206Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK STEERING FLUID PRESSURE 
    1. Disconnect the pressure feed tube from the power steering gear assy (see OVERHAUL ).
    2. Connect SST, as shown in the illustration on the next page.

      SST 09640-10010 (09641-01010, 09641-01020, 09641-01030)

      NOTE: Check that the valve of the SST is in the open position.
    3. Bleed the power steering system.
    4. Start the engine and run at idle.
    5. Turn the steering wheel from lock to lock several times to raise fluid temperature.

      Fluid temperature: 75 to 80°C (167 to 176°F) 

      Fig 6: Connecting SST
      G02615207Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. With the engine idling, close the valve of the SST and observe the reading on the SST.

      Fluid pressure: 

      7,300 to 7,800 kPa (75 to 80 kgf/cm 2  , 1,059 to 1,131 psi) 

      NOTE:
      • Do not keep the valve closed for more than 10 seconds.
      • Do not let the fluid temperature become too high.
      Fig 7: Closing Valve Of SST And Observe Reading On SST
      G02615208Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. With the engine idling, open the valve fully.
    8. Measure the fluid pressure at engine speeds of 1,000 RPM and 3,000 RPM.

      Fluid pressure difference: 490 kPa (5 kgf/cm 2  , 71 psi) or less 

      NOTE: Do not turn the steering wheel.
      Fig 8: Measuring Fluid Pressure At Engine Speeds
      G02615209Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. With the engine idling and the valve fully opened, turn the steering wheel to the left or right full lock position.

      Fluid pressure: 7,300 to 7,800 kPa (75 to 80 kgf/cm 2  , 1,059 to 1,131 psi) 

      NOTE:
      • Do not keep the steering wheel in the full lock position for more than 10 seconds.
      • Do not let the fluid temperature become too high.
      Fig 9: Turning Steering Wheel To Left Or Right Full Lock Position
      G02615210Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    10. Disconnect the SST.

      SST 09640-10010 (09641-01010, 09641-01020, 09641-01030)

    11. Connect the pressure feed tube to the power steering gear assy (see OVERHAUL ).
    12. Bleed the power steering system.
  5. CHECK STEERING EFFORT 
    1. Center the steering wheel assy.
    2. Remove the horn button assy (see REPLACEMENT ).
    3. Start the engine and run at idle.
    4. Measure the steering effort in both directions.

      Steering effort (Reference): 6 N.m (60 kgf.cm, 53 in..lbf) or less 

      Fig 10: Checking Steering Effort
      G02615211Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      Check tire type, pressure and contact surface before making your diagnosis.

    5. Check the steering wheel assy set nut.

      Torque: 50 N.m (510 kgf.cm, 37 ft.lbf) 

    6. Install the horn button assy (see REPLACEMENT ).
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