VANE PUMP (for 1GR-FE) 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.

      Tech Tips

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

  2. BLEED AIR FROM POWER STEERING SYSTEM


    1. Check the fluid level.

    2. Jack up the front of the vehicle and support it with 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 the 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.*1

      2. Repeat *1 several times.

    7. Stop the engine.

    8. A00JWXVE03
      Text in Illustration
      *a CORRECT
      *b INCORRECT

      Check for foaming or emulsification.

      If the system has to be bled twice specifically because of foaming or emulsification, check for fluid leaks in the power steering system.

    9. Check the fluid level.

  3. CHECK POWER STEERING FLUID LEVEL


    1. A00JZT7

      Keep the vehicle horizontal.

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

      If necessary, add fluid.

      Fluid
      ATF "DEXRON" II or III, or equivalent.

      Tech Tips

      If the fluid is hot (over 40°C (104°F)), make sure that the fluid level is within the HOT range on the reservoir. If the fluid is cold, make sure that it is within the COLD range.

    3. Start the engine and run it at idle.

    4. Turn the steering wheel from lock to lock several times to raise the fluid temperature.

      Fluid temperature
      80°C (176°F)
    5. A00JWXVE03
      Text in Illustration
      *a CORRECT
      *b INCORRECT

      Check for foaming or emulsification.

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

    6. A00JXIJE03
      Text in Illustration
      *a Engine Idling
      *b Engine Stopped
      *c 5 mm or less

      With the engine idling, measure the fluid level in the reservoir.

    7. Stop the engine.

    8. Wait a few minutes and remeasure the fluid level in the reservoir.

      Maximum increase in fluid level
      Approximately 5 mm (0.197 in.)

      If the fluid level rise is more than the maximum, bleed air from the power steering system.

    9. Check the fluid level.

  4. CHECK STEERING FLUID PRESSURE


    1. Disconnect the pressure feed tube from the vane pump.

    2. A00JZ3UE02
      Text in Illustration
      *a In
      *b Out
      *1 Attachment
      *2 Pressure Feed Tube

      Connect SST as shown in the illustration below.

      SST
      09640-10010   ( 09641-01010, 09641-01030, 09641-01060 )

      Note

      Check that the valve of SST is in the open position.

    3. Bleed air from 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 the fluid temperature.

      Fluid temperature
      80°C (176°F)
    6. A00JYL3E02

      With the engine idling, close the valve of SST and observe the reading on SST.

      Standard fluid pressure
      8300 to 8800 kPa (84.7 to 89.7 kgf/cm2, 1204 to 1276 psi)
      Text in Illustration
      *1 Power Steering Gear
      *2 Power Steering Fluid Reservoir
      *3 Power Steering Vane Pump
      *a Valve Closed

      Note


      • Do not keep the valve closed for more than 10 seconds.

      • Do not allow the fluid temperature to become too high.

      If the pressure is not within the specified range, check for fluid leaks and replace parts as necessary.

    7. A00JUNTE02
      Text in Illustration
      *1 Power Steering Gear
      *2 Power Steering Fluid Reservoir
      *3 Power Steering Vane Pump
      *a Valve Open

      With the engine idling, open the valve fully.

    8. Measure the fluid pressure at engine speeds of 1000 rpm and 3000 rpm.

      Fluid pressure difference
      490 kPa (5.0 kgf/cm2, 71 psi) or less

      Note

      Do not turn the steering wheel.

      If the pressure difference is above the specified range, check for fluid leaks and replace parts as necessary.

    9. A00JTNTE02

      With the engine idling and the valve fully open, turn the steering wheel left or right to the full lock position. Observe the reading on SST.

      Standard fluid pressure
      8300 to 8800 kPa (84.7 to 89.7 kgf/cm2, 1204 to 1276 psi)
      Text in Illustration
      *1 Power Steering Gear (Lock Position)
      *2 Power Steering Fluid Reservoir
      *3 Power Steering Vane Pump
      *a Valve Open

      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.

      If the pressure is not within the specified range, check for fluid leaks and replace parts as necessary.

    10. Disconnect SST.

    11. Connect the pressure feed tube to the vane pump.

    12. Bleed air from the power steering system.