suspension TOYOTA SIENNA 2007 Service Repair Manual

EM–342GR-FE ENGINE MECHANICAL – ENGINE ASSEMBLY
EM
45. REMOVE PROPELLER WITH CENTER BEARING
SHAFT ASSEMBLY (See page PR-3)
46. DISCONNECT FRONT STABILIZER LINK ASSEMBLY
LH (See page DS-5)
47. DISCONNECT FRONT STABILIZER LINK ASSEMBLY
RH
HINT:
Use the same procedures described for the LH side.
48. REMOVE FRONT AXLE HUB NUT LH (See page DS-
5)
49. REMOVE FRONT AXLE HUB NUT RH
HINT:
Use the same procedures described for the LH side.
50. DISCONNECT FRONT SPEED SENSOR LH (See page
DS-5)
51. DISCONNECT FRONT SPEED SENSOR RH
HINT:
Use the same procedures described for the LH side.
52. DISCONNECT TIE ROD ASSEMBLY LH (See page
DS-6)
53. DISCONNECT TIE ROD ASSEMBLY RH
HINT:
Use the same procedures described for the LH side.
54. SEPARATE FRONT SUSPENSION LOWER NO. 1
ARM LH (See page DS-6)
55. SEPARATE FRONT SUSPENSION LOWER NO. 1
ARM RH
HINT:
Use the same procedures described for the LH side.
56. SEPARATE FRONT AXLE ASSEMBLY LH (See page
DS-6)
57. SEPARATE FRONT AXLE ASSEMBLY RH
HINT:
Use the same procedures described for the LH side.
58. DISCONNECT STEERING INTERMEDIATE SHAFT
SUB-ASSEMBLY
59. DISCONNECT DISCHARGE HOSE SUB-ASSEMBLY
(See page AC-227)
60. DISCONNECT SUCTION HOSE SUB-ASSEMBLY (See
page AC-227)
61. REMOVE ENGINE ASSEMBLY WITH TRANSAXLE
(a) Set the engine lifter.

2GR-FE ENGINE MECHANICAL – ENGINE ASSEMBLYEM–35
EM
(b) Remove the 6 bolts, 2 nuts, and frame side rail
plates RH and LH.
(c) Remove the 6 bolts, 2 nuts, and front suspension
member brace rear RH and LH.
(d) Operate the engine lifter, then remove the engine
assembly from the vehicle.
NOTICE:
Make sure that the engine is clear of all wiring
and hoses.
62. REMOVE V-RIBBED BELT (See page EM-6)
63. REMOVE VANE PUMP ASSEMBLY
(a) Disconnect the power steering oil pressure switch
connector.
(b) Remove the 2 nuts.
(c) Loosen the bolt A.
(d) Remove the bolt B.
(e) Remove the bolt A and vane pump assembly.
64. REMOVE FRONT STABILIZER BAR (for 4WD)
HINT:
See page SP-35.
65. REMOVE POWER STEERING LINK
(a) Remove the 2 bolts and power steering link with
vane pump.
A162364
A162363
A155024
A139216E01

DS–6DRIVE SHAFT – FRONT DRIVE SHAFT
DS
7. SEPARATE TIE ROD END SUB-ASSEMBLY LH
(a) Remove the cotter pin and nut.
(b) Using SST, separate the tie rod end from the
steering knuckle.
SST 09628-62011
8. SEPARATE NO. 1 FRONT SUSPENSION ARM SUB-
ASSEMBLY LOWER LH
(a) Remove the bolt and 2 nuts, and separate the No. 1
front suspension arm sub-assembly lower from the
lower ball joint.
9. SEPARATE FRONT AXLE ASSEMBLY LH
(a) Using a plastic hammer, separate the drive shaft
from the axle hub.
NOTICE:
Be careful not to damage the boot and speed
sensor rotor.
10. REMOVE FRONT DRIVE SHAFT ASSEMBLY LH
(a) Using SST, remove the front drive shaft assembly
LH.
SST 09520-01010, 09520-24010 (09520-32040)
NOTICE:
• Be careful not to damage the transaxle case
oil seal, inboard joint boot and drive shaft
dust cover.
• Be careful not to drop the drive shaft
assembly.
11. REMOVE FRONT DRIVE SHAFT ASSEMBLY RH (for
2WD)
(a) Using a screwdriver, remove the bearing brake hole
snap ring.
(b) Remove the bolt and front drive shaft assembly RH
from the drive shaft bearing bracket.
F045060E06
F040142
D027403E03
F040148E05
C080304

AH–6AXLE – FRONT AXLE HUB
AH
REMOVAL
HINT:
Replace the RH side using the same procedures as for the
LH side.
1. REMOVE FRONT WHEEL
2. REMOVE FRONT AXLE HUB LH NUT (See page DS-
5)
3. SEPARATE SPEED SENSOR FRONT LH (See page
DS-5)
4. SEPARATE FRONT DISC BRAKE CALIPER
ASSEMBLY LH
(a) Remove the 2 bolts and separate the front disc
brake caliper assembly LH from the steering
knuckle LH.
NOTICE:
Use a string or other device to keep the brake
caliper from hanging down.
5. REMOVE FRONT DISC
6. SEPARATE TIE ROD END SUB-ASSEMBLY LH (See
page DS-6)
7. SEPARATE FRONT SUSPENSION ARM SUB-
ASSEMBLY LOWER NO.1 LH (See page DS-6)
8. REMOVE FRONT AXLE ASSEMBLY LH
(a) Using a plastic hammer, separate the front drive
shaft assembly LH from the front axle hub sub-
assembly LH.
NOTICE:
Be careful not to damage the boot and ABS
speed sensor rotor.
(b) Remove the 2 bolts, nuts and steering knuckle LH
with the front axle nub sub-assembly LH.
C067088
D027403
C083023

AXLE – FRONT AXLE HUBAH–9
AH
4. INSTALL FRONT AXLE HUB LH HOLE SNAP RING
(a) Using snap ring pliers, install a new front axle hub
LH hole snap ring.
5. INSTALL FRONT WHEEL BEARING DUST
DEFLECTOR NO.1 LH
(a) Using SST(s) and a hammer, install the bearing dust
deflector No. 1 LH.
SST 09316-60011 (09316-00011, 09316-00031),
09608-32010
HINT:
Align the hole for the speed sensor in the bearing
dust deflector No. 1 LH with the steering knuckle.
6. INSTALL LOWER BALL JOINT ASSEMBLY FRONT
LH
(a) Install the lower ball joint assembly front LH and
tighten the nut.
Torque: 123 N*m (1,250 kgf*cm, 91 ft.*lbf)
(b) Install a new cotter pin.
NOTICE:
If the holes for the cotter pin are not aligned,
tighten the nut up to 60
further.
INSTALLATION
1. INSTALL FRONT AXLE ASSEMBLY LH
(a) Install the 2 bolts, nuts and front axle assembly LH
with the 2 bolts and nuts to the shock absorber
assembly front LH.
Torque: 230 N*m (2,350 kgf*cm, 170 ft.*lbf)
NOTICE:
• Only when reusing the bolts and nuts, apply
the small amount of engine oil to the screw
part of the nuts.
• Do not excessively push out the front axle
assembly LH.
• Be careful not to damage the outboard joint
boot.
• Be careful not to damage the speed sensor
rotor.
2. INSTALL FRONT SUSPENSION ARM SUB-
ASSEMBLY LOWER NO.1 LH (See page DS-18)
3. INSTALL TIE ROD END SUB-ASSEMBLY LH (See
page DS-18)
4. INSTALL FRONT DISC
F045465
F045054E03
C083023

SUSPENSION – SUSPENSION SYSTEMSP–3
SP
PROBLEM SYMPTOMS TABLE
FRONT SUSPENSION SYSTEM
REAR SUSPENSION SYSTEM
Symptom Suspected Area See page
Bottoming1. Vehicle (Overloaded) -
2. Spring (Weak)SP-12
3. Shock absorber (Worn)SP-12
Sways / pitches1. Tire (Worn or improperly inflated)TW-2
2. Stabilizer bar (Bent or broken) (2WD)SP-28
3. Stabilizer bar (Bent or broken) (4WD)SP-35
4. Shock absorber (Worn)SP-12
Front wheel shimmy1. Tire (Worn or improperly inflated)TW-2
2. Wheel (Out of balance)TW-2
3. Shock absorber (Worn)SP-12
4. Wheel alignment (Incorrect)SP-4
5. Ball joint (Worn)SP-24
6. Hub bearing (Worn)AH-5
7. Steering linkage (Loose or worn) -
Abnormal tire wear1. Tire (Worn or improperly inflated)TW-2
2. Wheel alignment (Incorrect)SP-4
3. Shock absorber (Worn)SP-12
4. Suspension parts (Worn) -
Symptom Suspected Area See page
Wander / pulls1. Tire (Worn or improperly inflated)TW-2
2. Wheel alignment (Incorrect)SP-9
3. Steering linkage (Loose or worn) -
4. Hub bearing (Worn) (2WD)AH-16
5. Hub bearing (Worn) (4WD)AH-19
6. Suspension parts (Worn) -
Bottoming1. Vehicle (Overloaded) -
2. Spring (Weak)SP-51
3. Shock absorber (Worn)SP-52
Sways / pitches1. Tire (Worn or improperly inflated)TW-2
2. Stabilizer bar (Bent or broken) (2WD)SP-28
3. Stabilizer bar (Bent or broken) (4WD)SP-35
4. Shock absorber (Worn)SP-52
Rear wheel shimmy1. Tire (Worn or improperly inflated)TW-2
2. Wheel (Out of balance)TW-2
3. Shock absorber (Worn)SP-52
4. Wheel alignment (Incorrect)SP-9
5. Hub bearing (Worn) (2WD)AH-16
6. Hub bearing (Worn) (4WD)AH-19
Abnormal tire wear1. Tire (Worn or improperly inflated)TW-2
2. Wheel alignment (Incorrect)SP-9
3. Shock absorber (Worn)SP-9
4. Suspension parts (Worn) -

SUSPENSION – REAR SHOCK ABSORBERSP–51
SP
REMOVAL
1. REMOVE REAR WHEEL
2. REMOVE REAR SHOCK ABSORBER CAP LH
(a) Remove the shock absorber head cover.
(b) Remove the shock absorber cap LH.
3. REMOVE SHOCK ABSORBER ASSEMBLY REAR LH
(a) Support the rear axle beam with a jack.
(b) Using a 6 mm hexagon wrench to hold the piston
rod, remove the lock nut.
(c) Remove the rear shock absorber LH cushion
retainer and rear shock absorber cushion No.1.
G023895
C088670
G023896
G023897

SP–52SUSPENSION – REAR SHOCK ABSORBER
SP
(d) Remove the nut, cushion retainer and shock
absorber assembly rear LH.
(e) Remove the rear spring bumper No.1 LH from the
shock absorber assembly rear LH.
INSPECTION
1. INSPECT SHOCK ABSORBER ASSEMBLY REAR LH
(a) Push down and pull up the shock absorber rod, and
check that there is no unusual resistance or unusual
operation sound.
If there is any malfunction, replace the shock
absorber with a new one.
NOTICE:
When disposing of the shock absorber, see
DISPOSAL (See page SP-54).
INSTALLATION
1. INSTALL SHOCK ABSORBER ASSEMBLY REAR LH
(a) Install the rear spring bumper No.1 LH to the shock
absorber assembly LH.
(b) Support the rear axle beam assembly with a jack.
(c) Install the rear shock absorber assembly rear LH,
cushion retainer and nut to the rear axle beam.
C088671
C088672
C088673
C088672
C088670

SUSPENSION – REAR SHOCK ABSORBERSP–53
SP
(d) Install the rear shock absorber cushion No.1 and
rear shock absorber LH cushion retainer.
(e) Temporary tighten a new lock nut.
(f) Using a 6mm hexagon wrench to hold the piston
rod, fully tighten the lock nut.
Torque: 30 N*m (310 kgf*cm, 22 ft.*lbf)
2. INSTALL REAR SHOCK ABSORBER CAP LH
(a) Install the shock absorber cap LH as shown in the
illustration.
(b) Install the shock absorber head cover.
3. INSTALL REAR WHEEL
Torque: 103 N*m (1,050 kgf*cm, 76 ft.*lbf)
G023897
G023896
G024672
G023895

SP–54SUSPENSION – REAR SHOCK ABSORBER
SP
4. FULLY TIGHTEN SHOCK ABSORBER ASSEMBLY
REAR LH
(a) Stabilize the shock absorber assembly rear LH.
If it is impossible to tighten the nut at this position,
support the rear axle beam with a jack and load the
rear compartment with a mass of approximately 90
kg (198 lb).
Length of shock absorber:
2WD DRIVE TYPE:
234 mm (9.22 in.)
4WD DRIVE TYPE:
258 mm (10.16 in.)
(b) Fully tighten the nut.
Torque: 115 N*m (1,173 kgf*cm, 85 ft.*lbf)
5. INSPECT REAR WHEEL ALIGNMENT
HINT:
(See page SP-9)
DISPOSAL
1. DISPOSE OF SHOCK ABSORBER ASSEMBLY REAR
LH
(a) Fully extend the shock absorber rod.
(b) Using a drill, make a hole in the cylinder as shown in
the illustration to discharge the gas inside the
cylinder.
CAUTION:
• When drilling, since the fragments may fly
out, work carefully.
• The discharged gas is colorless, odorless
and non-poisonous.
C088682
C088671
C066544E01