2001 TOYOTA SEQUOIA O2 sensor

TR04H±04
TR±2
± TRANSFERTROUBLESHOOTING
2940 Author: Date:
2005 SEQUOIA (RM1146U)
TROUBLESHOOTING
PROBLEM SYMPTOMS TABLE
Use the table below to help find the cause of the problem. The numbers indicate the priority of the likely cause
of the problem. Check each part in order. If necessary, replace these parts.
SymptomSuspected AreaSee page
Noise
1. Oil (Level low)
2. Oil (Wrong)
3. Transfer faultyTR±5
TR±5
TR±7
Oil leakage
1. Oil (Level too high)
2. Gasket (Damaged)
3. Oil seal (Worn or damaged)
4. O±ring (Worn or damaged)TR±5
TR±7
TR±16
TR±7
Tight corner brakingCenter differential or transfer faultyTR±7
Shift from 2WD (H) to 4WD (H) impossible
1. 4WD fuse
2. Wire harness
3. Vehicle speed sensor
4. 2WD/4HI switch
5. 4WD indicator light
6. Actuator assembly
7. A.D.D. control system
8. 4WD control ECU
9. Transfer assembly±
±
BE±55
TR±39
TR±39
TR±39
SA±61
TR±39
TR±3
Shift from 2WD (H) to 4WD (L4) impossible
1. 4LO switch
2. Wire harness
3. 4WD control ECUTR±39
±
TR±39
Shift from 4WD (H) to 4WD (L4) impossible
1. 4LO switch
2. Wire harness
3. 4WD control ECUTR±9
±
TR±39
Shift from 4WD (H) to 2WD (H) impossible
1. 4WD fuse
2. Wire harness
3. 4WD indicator light
4. Actuator assembly
5. A.D.D. control system
6. 4WD control ECU
7. Transfer assembly±
±
TR±39
TR±39
SA±61
TR±39
TR±3
Shift from 4WD (L4) to 2WD (H) impossible
1. 2WD/4HI switch
2. Wire harness
3. 4WD control ECUTR±39
±
TR±39
Shift from 4WD (L4) to 4WD (H) impossible
1. 2WD/4HI switch
2. Wire harness
3. 4WD control ECUTR±39
±
TR±39

TR0DD±01
F19315
F19237
TR±4
± TRANSFERTRANSFER UNIT
2942 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. SWITCH TRANSFER TO 2WD
2. REMOVE PROTECTOR
Remove the 4 bolts and protector.
3. DRAIN TRANSFER OIL
4. REMOVE FRONT SUSPENSION MEMBER BRACKET
Remove the 8 bolts and 2 front suspension member brackets.
5. REMOVE LH AND RH FRONT EXHAUST PIPES
(See page EM±126)
6. REMOVE FRONT AND REAR PROPELLER SHAFT
(See page PR±7)
7. REMOVE CROSS MEMBER
(a) Remove the 2 bolts and heat insulator.
(b) Support the rear side of the transmission with a transmis-
sion jack.
(c) Remove the 4 set bolts of the engine rear mounting.
(d) Remove the 4 bolts, nuts and cross member.
8. REMOVE ENGINE REAR MOUNTING
Remove the 4 bolts and engine rear mounting from the transfer.
9. DISCONNECT VEHICLE SPEED SENSOR AND
TRANSFER ACTUATOR CONNECTORS
10. REMOVE TRANSFER
(a) Support the transfer with another transmission jack.
(b) Remove the 8 transfer mounting bolts.
(c) Pull the transfer out from the transmission down and to-
ward the rear.

TR0DE±01
F19237
F19338
0 to 5 mm
(0 to 0.1968 in.)
± TRANSFERTRANSFER UNIT
TR±5
2943 Author: Date:
2005 SEQUOIA (RM1146U)
INSTALLATION
1. INSTALL TRANSFER
Raise the transfer and install it to the transmission with the 8
transfer mounting bolts.
Torque: 24 N´m (245 kgf´cm, 18 ft´lbf)
NOTICE:
Take care not to damage the lip of the transfer rear oil seal
with the transfer input shaft.
2. CONNECT VEHICLE SPEED SENSOR AND TRANS-
FER ACTUATOR CONNECTORS
3. INSTALL ENGINE REAR MOUNTING
Install the engine rear mounting to the transfer with the 4 bolts.
Torque: 65 N´m (660 kgf´cm, 48 ft´lbf)
4. INSTALL CROSS MEMBER
(a) Install the cross member with the 4 bolts and nuts.
Torque: 72 N´m (730 kgf´cm, 53 ft´lbf)
(b) Install the 4 set bolts of the engine rear mounting.
Torque: 18 N´m (185 kgf´cm, 13 ft´lbf)
(c) Remove the transmission jacks.
(d) Install the heat insulator with the 2 bolts.
Torque: 16 N´m (164 kgf´cm, 12 ft´lbf)
5. INSTALL FRONT AND REAR PROPELLER SHAFTS
(See page PR±9)
6. INSTALL LH AND RH FRONT EXHAUST PIPES
(See page EM±128)
7. INSTALL FRONT SUSPENSION MEMBER BRACKET
Install the 2 front suspension member brackets with the 8 bolts.
Torque: 33 N´m (336 kgf´cm, 24 ft´lbf)
8. FILL WITH TRANSFER OIL
(a) Remove the filler plug and gasket.
(b) Fill with transfer oil.
Oil grade: API GL±4 or GL±5
Viscosity: SAE 75W±90
Capacity: 1.4 liters (1.5 US qts, 1.2 lmp.qts)
NOTICE:

When supplying oil, pour it slowly.

Supply oil several times at several minute intervals.
HINT:
The oil level must be within 0 to 5 mm (0 to 0.1968 in.) down from
the lowest end of the hole for the filler plug.
(c) After leaving it for 5 minutes, check the oil level again.
(d) Install the filler plug with a new gasket.
Torque: 37 N´m (377 kgf´cm, 27 ft´lbf)

F01718F05219F14317
Front:
Rear:A
B
C
DSA23H±05
SA±4
± SUSPENSION AND AXLEFRONT WHEEL ALIGNMENT
3000 Author: Date:
2005 SEQUOIA (RM1146U)
FRONT WHEEL ALIGNMENT
INSPECTION
NOTICE:
Be sure to perform the zero point calibration of the steering
angle, master cylinder pressure, yaw rate and deceleration
sensors (See page DI±897).
1. MEASURE VEHICLE HEIGHT
Measuring points:
A: Ground clearance of the front drive shaft center
B: Ground clearance of the front adjusting cam bolt center
C: Ground clearance of the rear axle shaft center
D: Ground clearance of the rear lower control arm front bolt cen-
ter
Vehicle height (Except air suspension models):
UCK35L±GKBSKA
Tire size: P245/70R16
Front
Rear
Tire size: P265/70R16 and P265/65R17
Front
Rear
A ± B: 69.7 mm (2.74 in.)
C ± D: 76.2 mm (3.00 in.)
A ± B: 69.5 mm (2.74 in.)
C ± D: 75.5 mm (2.97 in.)
UCK35L±GKBLKA
Front
Rear
A ± B: 71.6 mm (2.82 in.)
C ± D: 77.3 mm (3.04 in.)
UCK45L±GKBSKA
Front
Rear
A ± B: 61.6 mm (2.43 in.)
C ± D: 63.8 mm (2.51 in.)
UCK45L±GKBLKA
Front
Rear
A ± B: 62.8 mm (2.47 in.)
C ± D: 65.2 mm (2.57 in.)
Vehicle height (Air suspension models):
UCK35L±GKBSKA
Tire size: P245/70R16
Front
Rear
Tire size: P265/70R16 and P265/65R17
Front
Rear
A ± B: 68.5 mm (2.69 in.)
C ± D: 74.8 ± 104.8 mm (2.94 ± 4.13 in.)
A ± B: 68.3 mm (2.69 in.)
C ± D: 74.1 ± 104.1 mm (2.92 ± 4.10 in.)
UCK35L±GKBLKA
Front
Rear
A ± B: 70.3 mm (2.77 in.)
C ± D: 74.6 ± 104.6 mm (2.94 ± 4.12 in.)
UCK45L±GKBSKA
Front
Rear
A ± B: 60.5 mm (2.38 in.)
C ± D: 61.0 ± 91.0 mm (2.40 ± 3.58 in.)
UCK45L±GKBLKA
Front
Rear
A ± B: 61.8 mm (2.43 in.)
C ± D: 61.3 ± 91.3 mm (2.41 ± 3.59 in.)
NOTICE:
Before inspecting the wheel alignment, adjust the vehicle
height to the specified value.

SA2CO±01
± SUSPENSION AND AXLEWHEEL AND TIRE SYSTEM
SA±11
3007 Author: Date:
2005 SEQUOIA (RM1146U)
WHEEL AND TIRE SYSTEM
PRECAUTION
1. REMOVAL AND INSTALLATION OF TIRE PRESSURE MONITOR VALVE SUB±ASSY
(a) When installing a tire, make sure that the tire pressure monitor valve does not interfere with the tire
bead in order to prevent damage to the sensor.
(b) After completing the operation, remove the valve core to rapidly release air and check that the warning
light comes on. If not, the system may have a defect.
(c) If there is air leakage, tighten the nut with a force of 4.0 NVm (41 kgfVcm, 35 in.Vlbf) and push the valve
core 2 or 3 times to remove any dirt attached to the valve core.
If there is still air leakage, replace the grommet, the washer and the nut all together.
(d) When installing the tire pressure monitor valve, check whether the rim, grommet, washer and nut are
clean. Use a manufacturer±specified cap.
(e) When putting air into the tire, first install the tire pressure valve straight onto the stem of the tire pres-
sure monitor valve.
2. TIRE AND WHEEL REPLACEMENT OR TIRE ROTATION
(a) When replacing tires, be sure to check if the grommet of the tire valve is damaged. If so, replace the
grommet together with the washer and nut.
(b) When tires and wheels are replaced, make sure to register the transmitter ID.

SA2CT±01
F19824
Shoe Tire
10 to 20 mm
(0.39 to 0.79 in.)
F19825
Print Surface
SA±16
± SUSPENSION AND AXLETIRE PRESSURE MONITOR VALVE
3012 Author: Date:
2005 SEQUOIA (RM1146U)
REPLACEMENT
1. REMOVE FRONT TIRE
2. REMOVE REAR TIRE
3. REMOVE TIRE PRESSURE MONITOR VALVE
(a) Remove the valve core and cap, and release air from the
tire.
(b) After ensuring that air is sufficiently released, remove the
nut and washer that are used to fix the tire pressure moni-
tor valve sub±assy and drop the sensor inside the tire.
HINT:
Keep the removed cap, valve core, nut and washer.
(c) After dropping the tire pressure monitor valve sub±assy
into the tire, disengage the bead using the shoe of the tire
remover.
NOTICE:
Be careful not to damage the tire pressure monitor valve
because of interference between the sensor and tire bead.
(d) Remove the bead on the upper side.
(e) Take out the sensor from the tire and remove the bead on
the lower side.
(f) Remove the inner grommet from the tire pressure monitor
valve sub±assy.
HINT:
Check that there are no cracks or damage to the grommet. If
any damage is found, replace the grommet together with the
washer and nut.
4. INSTALL TIRE PRESSURE MONITOR VALVE
(a) Insert the tire pressure monitor valve into the valve instal-
lation hole. Insert from the inside of the rim so that the print
surface can be seen.
NOTICE:

Check that there is no visible deformation, damage or
other abnormalities on the transmitter.

Check that there is no foreign matter on the inner
grommet and around the rim hole.

F19826
Rim
Sensor
Cap
Nut
WasherGrommet
F19827
Area for the sensorRim
Rim rotating
direction
Rim rotating
directionRim
Area for the sensor
Mount tool of the mounting machine
Mount tool of the mounting machine
± SUSPENSION AND AXLETIRE PRESSURE MONITOR VALVE
SA±17
3013 Author: Date:
2005 SEQUOIA (RM1146U)

If installed in the reverse direction, the tire pressure
monitor valve may be damaged or fail to transmit sig-
nals when running at high speed.

If installing a new tire pressure monitor valve, write
down the ID number before installation.

It is necessary to registor an ID in the ECU after instal-
lation (See page DI±805).
(b) Install the washer on the tire pressure monitor valve from
the rim side and tighten with a nut.
Torque: 4.0 NVm (41 kgfVcm, 35 in.Vlbf)
NOTICE:

Check that there is no foreign matter on the washer
and nut.

If the tire pressure monitor valve is removed when the
tire is removed for replacement, check that there is no
damage or cuts, and no foreign matter such as mud,
dirt or sand attached to the grommet. Replace the
grommet with a new one if any of the defects men-
tioned above are found.

Check that there is no oil, water or lubricant around
the rim hole, tire pressure monitor valve, washer and
nut. Failing to do so may result in improper installa-
tion.
(c) After the tire is inflated, the valve nut may be loose. Re-
tighten the nut to the specified torque and then check for
air leaks with soapy water.
Torque: 4.0 NVm (41 kgfVcm, 35 in.Vlbf)
(d) Set the wheel disc to the mounting machine and install the
lower tire bead. Position the main body of the sensor as
in the shaded area shown in the illustration.
NOTICE:
If the sensor is positioned outside this area, it generates in-
terference with the tire bead, causing possible damage to
the sensor.
(e) Install the upper bead.
NOTICE:
Make sure that the tire bead and tool do not interfere with
the main body of the sensor and that the sensor is not
clamped by the bead.
5. INSTALL FRONT WHEEL
Torque: 103 NVm (1,050 kgfVcm, 76 ftVlbf)
6. INSTALL REAR WHEEL
Torque: 103 NVm (1,050 kgfVcm, 76 ftVlbf)
7. INSPECT TIRE (See page SA±3)
8. REGISTRATION OF TRANSMITTED ID
(See page DI±805)

SA143±10
F14316
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable part
64 (650, 47)
Brake CaliperHub Bolt
Cotter Pin
105 (1,100, 77)
8.0 (82, 71 in.´lbf)
Speed Sensor
Shock Absorber
135 (1,400, 100)
65 (663, 48)
123 (1,250, 90)
28 (285, 21)Steering Knuckle with Axle Hub
Disc
4WD:

Cotter Pin
235 (2,400, 173)
Lock Cap
Grease Cap
Grease Cap2WD:
4WD:

Oil Seal
Speed Sensor
Rotor
Dust Cover
Steering Knuckle
18 (185, 13)

Oil Seal
Bearing

Snap Ring
Axle Hub
Bearing Spacer4WD:
274 (2,800, 203)

Lock Nut 2WD:
± SUSPENSION AND AXLEFRONT AXLE HUB
SA±21
3017 Author: Date:
2005 SEQUOIA (RM1146U)
FRONT AXLE HUB
COMPONENTS