Toyota Sequoia (2005). Manual - part 811

F13254

IN

OUT

Attachment

Pressure Feed Tube

SST

Z15498

Oil
Reservoir

PS Vane
Pump

PS Gear

SST

Closed

Z15499

Oil
Reservoir

PS Vane
Pump

PS Gear

SST

Open

SR–6

–

STEERING

POWER STEERING FLUID

3233

2.

CHECK STEERING FLUID PRESSURE

(a)

Remove the air cleaner assembly with the air cleaner
hose connected (See page 

SR–26

).

(b)

Disconnect the pressure feed tube from the PS vane
pump (See page 

SR–26

).

(c)

Connect SST, as shown in the illustration.
SST

09640–10010 (09641–01010, 09641–01030,
09641–01060)

NOTICE:
Check that the valve of the SST is in the open position.
(d)

Bleed the power steering system (See page 

SR–4

).

(e)

Start the engine and run at idle.

(f)

Turn the steering wheel from the lock position to the other
side of lock position several times to boost fluid tempera-
ture.
Fluid temperature: 80 

°

C (176 

°

F)

(g)

With the engine idling, close the valve of the SST and ob-
serve the reading on the SST.
Minimum fluid pressure:
8,336 kPa (85 kgf/cm

2

, 1,209 psi)

NOTICE:

Do not keep the valve closed for more than 10 se-
conds.

Do not let the fluid temperature become too high.

(h)

With the engine idling, open the valve fully.

(i)

Measure the fluid pressure at engine speeds of 1,000 rpm
and 3,000 rpm.
Difference in fluid pressure:
490 kPa (5 kgf/cm

2

, 71 psi) or less

NOTICE:
Do not turn the steering wheel.

Z15500

Oil
Reservoir

PS Vane
Pump

PS Gear

SST

Open

Lock Position

–

STEERING

POWER STEERING FLUID

SR–7

3234

(j)

With the engine idling and the valve fully opened, turn the
steering wheel left or right to the full lock position.
Minimum fluid pressure:
8,336 kPa (85 kgf/cm

2

, 1,209 psi)

NOTICE:

Do not maintain the lock position for more than 10 se-
conds.

Do not let the fluid temperature become too high.

(k)

Disconnect the SST.
SST

09640–10010 (09641–01010, 09641–01030,
09641–01060)

(l)

Connect the pressure feed tube (See page 

SR–36

).

(m)

Install the air cleaner assembly with air cleaner hose (See
page 

SR–36

).

(n)

Bleed air from the power steering system 
(See page 

SR–4

).

F06726

Vacuum Hose

SR01X–08

SR–8

–

STEERING

AIR CONTROL VALVE

3235

AIR CONTROL VALVE

INSPECTION

1.

TURN AIR CONDITIONING SWITCH OFF

2.

CHECK IDLE–UP

(a)

Start the engine and run it at idle.

(b)

Fully turn the steering wheel.

(c)

Check that the engine speed decrease when the vacuum
hose of the air control valve is pinched.

(d)

Check that the engine speed increase when the hose is
released.

R07653

SR01Y–11

R09732

–

STEERING

STEERING WHEEL

SR–9

3236

STEERING WHEEL

INSPECTION

1.

CHECK STEERING WHEEL FREE PLAY

(a)

Stop the vehicle and face the tires straight ahead.

(b)

Gently rock the steering wheel up and down with a finger,
and check the steering wheel free play.
Maximum free play: 30 mm (1.18 in.)

2.

CHECK STEERING EFFORT

(a)

Center the steering wheel.

(b)

Remove the steering wheel pad (See page 

SR–12

).

(c)

Start the engine and run at idle.

(d)

Measure the steering effort in both directions.
Steering effort (Reference):
4.9 N·m (50 kgf·cm, 43 in.·lbf)

HINT:
Check tire type, pressure and contact surface before making
your diagnosis.
(e)

Tighten the steering wheel set nut.
Torque: 50 N·m (510 kgf·cm, 37 ft·lbf)

(f)

Install the steering wheel pad (See page 

SR–23

).