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On-Vehicle Inspection

  1. INSPECT DRIVE BELT 
    1. Visually check the belt for excessive wear, frayed cords, etc.
      Fig 1: Identifying Drive Belt Wear
      G02859260Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If any defect is found, replace the drive belt.

    NOTE: Cracks on the rib side of a belt are considered acceptable. If the missing chunks from the ribs are found on the belt, it should be replaced.
  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 - 3 seconds, then turn the wheel to the opposite full lock position and keep it there for 2 - 3 seconds.
      2. Repeat step (1) several times.
    7. Stop the engine.
    8. Check for foaming or emulsification.
      Fig 2: Identifying Foaming Or Emulsification
      G02859261Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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.
  3. CHECK FLUID LEVEL 
    1. Keep the vehicle level.
    2. With the engine stopped, check the fluid level in the oil reservoir.
      Fig 3: Identifying Fluid Level
      G02859262Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If necessary, add fluid.

      Fluid: ATF DEXRON® II or III 

      NOTE: Check that the fluid level is within the HOT LEVEL range on the reservoir cap. If the fluid is cold, check that it is within the COLD LEVEL range.
    3. Start the engine and run it at idle.
    4. Turn the steering wheel from lock to lock several times to raise fluid temperature.

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

    5. Check for foaming or emulsification.

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

      Fig 4: Checking For Foaming Or Emulsification
      G02859263Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. With the engine idling, measure the fluid level in the oil reservoir.
      Fig 5: Measuring Fluid Level In Oil Reservoir
      G02859264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Stop the engine.
    8. Wait a few minutes and remeasure the fluid level in the oil reservoir.

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

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

    9. Check the fluid level.
  4. CHECK STEERING FLUID PRESSURE 
    1. Disconnect the pressure feed tube from the PS gear. See OVERHAUL .
    2. Connect SST, as shown in Fig 6.
      Fig 6: Connecting SST For Checking Fluid Pressure
      G02859265Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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 it at idle.
    5. Turn the steering wheel from lock to lock several times to raise fluid temperature.

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

    6. With the engine idling, close the valve of the SST and observe the reading on the SST.
      Fig 7: Observing Fluid Pressure On SST After Closing Valve
      G02859266Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Fluid pressure: 8300 - 8800 kPa (85 - 90 kgf/cm 2  , 1209 - 1821 psi) 

      NOTE:
      • Do not keep the valve closed for more than 10 seconds.
      • Do not let the fluid temperature become too high.
    7. With the engine idling, open the valve fully.
      Fig 8: Observing Fluid Pressure On SST After Opening Valve
      G02859267Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Measure the fluid pressure at engine speeds of 1000 and 3000 RPM.

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

      NOTE: Do not turn the steering wheel.
    9. With the engine idling and valve fully opened, turn the steering wheel to full lock position.
      Fig 9: Observing Fluid Pressure On SST After Opening Valve & Steering Wheel In Full Lock Position
      G02859268Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Fluid pressure: 8300 - 8800 kPa (85 - 90 kgf/cm 2  , 1209 - 1821 psi) 

      NOTE:
      • Do not maintain lock position for more than 10 seconds.
      • Do not let the fluid temperature become too high.
    10. Disconnect the SST

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

    11. Connect the pressure feed tube to the PS gear. See OVERHAUL .
    12. Bleed the power steering system.
  5. CHECK STEERING EFFORT 
    1. Center the steering wheel.
    2. Remove the steering wheel pad. See OVERHAUL .
    3. Start the engine and run it at idle.
    4. Measure the steering effort in both directions.
      Fig 10: Checking Steering Wheel Effort
      G02859269Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

      NOTE: Take the tire type, pressure and contact surface into consideration before making your diagnosis.
    5. Torque the steering wheel set nut.

      Torque: 51 N.m (510 kgf.cm, 37 ft.lbf) 

    6. Install the steering wheel pad. See OVERHAUL .
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