2007 TOYOTA SIENNA stop start

BRAKE – BRAKE BOOSTERBR–19
BR
ON-VEHICLE INSPECTION
1. INSPECT BRAKE BOOSTER
(a) Air tightness check.
(1) Start the engine and stop it after 1 or 2 minutes.
Depress the brake pedal several times slowly.
HINT:
If the pedal goes down farthest at the 1st time,
and gradually rises at the 2nd or 3rd time, the
booster is airtight.
(2) Depress the brake pedal while the engine is
running, and stop the engine with the pedal
depressed.
HINT:
If there is no change in the pedal reserve
distance after holding the pedal for 30 seconds,
the booster is airtight.
(b) Operating check.
(1) Depress the brake pedal several times with the
ignition switch OFF and check that there is no
change in the pedal reserve distance.
(2) Depress the brake pedal and start the engine.
HINT:
If the pedal goes down slightly, the operation is
normal.
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SR–8STEERING COLUMN – STEERING COLUMN ASSEMBLY
SR
DISASSEMBLY
1. REMOVE STEERING INTERMEDIATE SHAFT
ASSEMBLY
(a) Align the matchmarks on the steering intermediate
shaft assembly and main shaft.
(b) Remove the bolt and steering intermediate shaft
assembly.
2. REMOVE KEY CYLINDER LIGHT ASSEMBLY (w/o
Engine Immobiliser System)
3. REMOVE TRANSPONDER KEY AMPLIFIER (w/
Engine Immobiliser System)
(a) Widen the claw hanging onto the upper bracket by
approx. 1.0 mm (0.039 in.) using a screwdriver.
(b) Pull the transponder key amplifier toward the rear of
the vehicle with the claw open.
NOTICE:
Take care not to use excessive force to prevent
the case from being damaged.
4. REMOVE STEERING COLUMN BRACKET
ASSEMBLY UPPER
(a) Using a centering punch, mark the center of the 2
tapered-head bolts.
(b) Using a 3 to 4 mm (0.12 to 0.16 in.) drill, drill a hole
into the heads of the 2 bolts.
(c) Using a screw extractor, remove the 2 bolts and
steering column upper w/ switch bracket assembly.
5. REMOVE IGNITION SWITCH LOCK CYLINDER
ASSEMBLY
(a) Place the ignition switch lock cylinder assembly in
the ACC position.
(b) Push down the stop pin with a screwdriver, and pull
out the cylinder assembly.
6. REMOVE UN-LOCK WARNING SWITCH ASSEMBLY
(a) Disconnect the un-lock warning switch assembly
connector from the ignition or starter switch
assembly.
(b) Remove the un-lock warning switch assembly by
pushing up the center part and releasing the 2
claws.
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SR–8STEERING COLUMN – STEERING COLUMN ASSEMBLY
SR
DISASSEMBLY
1. REMOVE STEERING INTERMEDIATE SHAFT
ASSEMBLY
(a) Align the matchmarks on the steering intermediate
shaft assembly and main shaft.
(b) Remove the bolt and steering intermediate shaft
assembly.
2. REMOVE KEY CYLINDER LIGHT ASSEMBLY (w/o
Engine Immobiliser System)
3. REMOVE TRANSPONDER KEY AMPLIFIER (w/
Engine Immobiliser System)
(a) Widen the claw hanging onto the upper bracket by
approx. 1.0 mm (0.039 in.) using a screwdriver.
(b) Pull the transponder key amplifier toward the rear of
the vehicle with the claw open.
NOTICE:
Take care not to use excessive force to prevent
the case from being damaged.
4. REMOVE STEERING COLUMN BRACKET
ASSEMBLY UPPER
(a) Using a centering punch, mark the center of the 2
tapered-head bolts.
(b) Using a 3 to 4 mm (0.12 to 0.16 in.) drill, drill a hole
into the heads of the 2 bolts.
(c) Using a screw extractor, remove the 2 bolts and
steering column upper w/ switch bracket assembly.
5. REMOVE IGNITION SWITCH LOCK CYLINDER
ASSEMBLY
(a) Place the ignition switch lock cylinder assembly in
the ACC position.
(b) Push down the stop pin with a screwdriver, and pull
out the cylinder assembly.
6. REMOVE UN-LOCK WARNING SWITCH ASSEMBLY
(a) Disconnect the un-lock warning switch assembly
connector from the ignition or starter switch
assembly.
(b) Remove the un-lock warning switch assembly by
pushing up the center part and releasing the 2
claws.
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POWER STEERING – POWER STEERING SYSTEMPS–3
PS
(b) With the engine stopped, check the fluid level in the
fluid reservoir.
If necessary, add fluid.
Fluid:
ATF DEXRON II or III, 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.
(c) Start the engine and run it at idle.
(d) Turn the steering wheel from lock to lock several
times to raise fluid temperature.
Fluid temperature:
75 to 80
C (167 to 176F)
(e) Check for foaming or emulsification.
If foaming or emulsification is identified, bleed the
power steering system (See page PS-6).
(f) With the engine idling, measure the fluid level in the
fluid reservoir.
(g) Stop the engine.
(h) 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 (See page PS-6).
(i) Check the fluid level.
3. INSPECT STEERING FLUID PRESSURE
(a) Disconnect the pressure feed tube assembly from
the vane pump assembly (See page PS-9).
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POWER STEERING – POWER STEERING SYSTEMPS–5
PS
(g) With the engine idling, open the valve fully.
(h) 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
NOTICE:
Do not turn the steering wheel.
(i) 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 SST.
Standard fluid pressure:
7,800 to 8,300 kPa (79.5 to 84.6 kgf/cm
2, 1,131
to 1,204 psi)
NOTICE:
• 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.
(j) Disconnect SST.
(k) Connect the pressure feed tube assembly to the
vane pump assembly (See page PS-19).
(l) Bleed the power steering system (See page PS-6).
4. CHECK STEERING EFFORT
(a) Stop the vehicle on a level, paved surface and turn
the wheels straight ahead.
(b) Disconnect the negative (-) battery cable from the
battery.
CAUTION:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent airbag and seat belt pretensioner
activation.
(c) Remove the steering pad (See page RS-423).
(d) Connect the negative (-) battery cable to the battery.
(e) Using a torque wrench, check if the steering wheel
set nut is properly tightened.
Torque: 50 N*m (510 kgf*cm, 37 ft.*lbf)
(f) Start the engine and run it at idle.
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PS–6POWER STEERING – POWER STEERING FLUID
PS
POWER STEERING FLUID
BLEEDING
1. BLEED POWER STEERING SYSTEM
(a) Check the fluid level (See page PS-2).
(b) Jack up the front of the vehicle and support it with
stands.
(c) Turn the steering wheel.
(1) With the engine stopped, turn the steering
wheel slowly from lock to lock several times.
(d) Lower the vehicle.
(e) Start the engine.
(1) Run the engine at idle for a few minutes.
(f) Turn the steering wheel.
(1) With the engine idling, turn the steering wheel
left or right to the full lock position and keep it in
that position for 2 to 3 seconds, then turn the
steering wheel to the opposite full lock position
and keep it there for 2 to 3 seconds.
(2) Repeat this procedure several times.
(g) Stop the engine.
(h) Check for foaming or emulsification.
HINT:
If the system has to be bled twice because of
forming or emulsification, be sure to check for fluid
leaks in the system.
(i) Check the fluid level (See page PS-2).
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