Toyota Tundra. Manual — part 2681

h. Check for foaming or emulsification.

Fig. 3: Checking For Foaming Or Emulsification Of P/S Fluid
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

i. Check the fluid level.

3. CHECK FLUID LEVEL

a. Keep the vehicle horizontal.

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

If necessary, add fluid.

Fluid: ATF DEXRON II or III

HINT:

If the fluid is hot, check that the fluid level is within the HOT range. If the fluid is cold, check that
the fluid level is within the COLD range.

Fig. 4: Identifying Fluid Level Cold And Hot Range
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c. Start the engine and run it at idle.

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

2009 Toyota Tundra

2009 STEERING Power Steering - Tundra

Fluid temperature: 80°C (176°F)

e. Check for foaming or emulsification.

Fig. 5: Checking For Foaming Or Emulsification Of P/S Fluid
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

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

g. Stop the engine.

Fig. 6: Identifying Fluid Level At Idle And Engine Off
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Maximum fluid level rise: 5.0 mm (0.197 in.)

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

i. Check the fluid level.

4. CHECK STEERING FLUID PRESSURE

a. for 2UZ-FE:

Remove the air cleaner with the air cleaner hose (see REMOVAL ).

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

2009 Toyota Tundra

2009 STEERING Power Steering - Tundra

1. For 1GR-FE, refer to the following procedures (see REMOVAL ).

2. For 2UZ-FE, refer to the following procedures (see REMOVAL ).

c. Connect SST as shown in the illustration.

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

Fig. 7: Checking Steering Fluid Pressure Using SST
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

d. Bleed the power steering system.

e. Start the engine and run it at idle.

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

Fluid temperature: 80°C (176°F)

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

Minimum fluid pressure: 8336 kPa (85.0 kgf/cm

2

, 1209 psi)

NOTE:

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

2009 Toyota Tundra

2009 STEERING Power Steering - Tundra

Fig. 8: Power Steering System Operation Diagram - Closed
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

h. With the engine idling, fully open the valve.

Fig. 9: Power Steering System Operation Diagram - Open
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Difference in fluid pressure: 490 kPa (5.0 kgf/cm

2

, 71 psi) or less

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

j. 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.

NOTE:



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



Do not allow the fluid temperature to become too high.

NOTE:

Do not turn the steering wheel.

2009 Toyota Tundra

2009 STEERING Power Steering - Tundra