On-Vehicle Inspection

INSPECT DRIVE BELT
1. Visually check the drive 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 Drive Belt
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK POWER STEERING FLUID LEVEL
1. Keep the vehicle level.
2. With the engine stopped, check the fluid level in the fluid reservoir.
  If necessary, add fluid.
  
  Fluid:
  
  ATF DEXRON II or 111, or equivalent
  
  HINT:
  
  If the fluid is hot, check that the fluid level is within the HOT range on the fluid reservoir. If the fluid is cold, check that the fluid level is within the COLD range.
  
  Fig 2: Identifying Fluid Level Mark On Fluid Reservoir
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 to 80°C (167 to 176°F)
5. Check for foaming or emulsification.
  If foaming or emulsification is identified, bleed the power steering system (POWER STEERING FLUID ).
  
  Fig 3: Checking Foaming Or Emulsification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. With the engine idling, measure the fluid level in the fluid reservoir.
7. Stop the engine.
8. Wait a few minutes and remeasure the fluid level in the fluid reservoir.
  Maximum fluid level rise:
  
  5 mm (0.20 in.)
  
  If a problem is found, bleed the power steering system (POWER STEERING FLUID ).
9. Check the fluid level.
  
  Fig 4: Checking Fluid Level
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT STEERING FLUID PRESSURE
1. Disconnect the No. 1 fluid reservoir to pump hose from the vane pump assembly (REMOVAL ).
2. Disconnect the pressure feed tube assembly from the vane pump assembly (REMOVAL ).
3. Connect SST as shown in the illustration.
  SST 09640-10010 (09641-01010, 09641-01060, 09641-01030)
  
  NOTE: Check that the valve of the SST is in the open position.
  
  Fig 5: Inspecting Steering Fluid Pressure
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Connect the No. 1 fluid reservoir to pump hose to the vane pump assembly (INSTALLATION ).
5. Bleed the power steering system (POWER STEERING FLUID ).
6. Start the engine and run it at idle.
7. Turn the steering wheel from lock to lock several times to raise fluid temperature.
  Fluid temperature:
  
  75 to 80°C (167 to 176°F)
8. With the engine idling, close the valve of the SST and observe the reading on the SST.
  Standard fluid pressure:
  
  7,800 to 8,300 kPa (79.5 to 84.6 kgf/cm ² , 1,131 to 1,204 psi)
  NOTE:
  - Do not keep the valve closed for more than 10 seconds.
  - Do not allow the fluid temperature to become too high.
    
    Fig 6: Checking Steering Fluid Pressure (Close Valve Of SST)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. With the engine idling, open the valve fully.
10. 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 7: Checking Steering Fluid Pressure (Open Valve Fully)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
11. With the engine idling and the valve fully opened, turn the steering wheel left or right to the full lock position. Observe the reading on the SST.
  Standard fluid pressure:
  
  7,800 to 8,300 kPa (79.5 to 84.6 kgf/cm ² , 1,131 to 1,204 psi)
  NOTE:
  - Do not keep the steering wheel in the full lock position for more than 10 seconds.
  - Do not allow the fluid temperature to become too high.
    
    Fig 8: Checking Steering Fluid Pressure (Engine Idling And Valve Fully Opened)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
12. Disconnect the No. 1 fluid reservoir to pump hose from the vane pump assembly (REMOVAL ).
13. Disconnect the SST.
14. Connect the pressure feed tube assembly to the vane pump assembly (INSTALLATION ).
15. Connect the No. 1 fluid reservoir to pump hose to the vane pump assembly (INSTALLATION ).
16. Bleed the power steering system (POWER STEERING FLUID ).
CHECK STEERING EFFORT
1. Stop the vehicle on a level, paved surface and turn the wheels straight ahead.
2. Disconnect the cable from the negative (-) battery terminal.
  NOTE: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
3. Remove the steering pad ( REMOVAL ).
4. Connect the cable to the negative (-) battery terminal.
5. Using a torque wrench, check if the steering wheel set nut is properly tightened.
  Torque: 50 N*m (510 kgf*cm, 37 ft.*lbf)
6. Start the engine and run it at idle.
7. Turn the steering wheel 90 degrees to the right and check steering effort (torque) while turning the wheel. Check the opposite direction in the same manner.
  Torque: Steering effort (Reference)
  
  6.0 N*m (61 kgf*cm, 53 in.*lbf)
  
  HINT:
  
  Check tire type, pressure, and the road surface before making your diagnosis.
  
  Fig 9: Checking Steering Wheel Set Nut
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Disconnect the cable from the negative (-) battery terminal.
9. Torque the steering wheel set nut.
  Torque: 50 N*m (510 kgf*cm, 37 ft.*lbf)
10. Install the steering pad ( INSTALLATION ).
11. Connect the cable to the negative (-) battery terminal.
12. Clear the DTCs ( DTC CHECK/CLEAR ).
13. Perform initialization.
  NOTE: Some systems need initialization after reconnecting the cable to the negative battery terminal ( INITIALIZATION ).
14. Inspect the airbag warning light ( DIAGNOSIS SYSTEM ).