2001 TOYOTA SEQUOIA wheel

F19340
A
B Four Wheel Drive Control ECU:
Transfer Actuator:
± TRANSFERONE TOUCH 2±4 SELECTOR SYSTEM
TR±43
2981 Author: Date:
2005 SEQUOIA (RM1146U)
10. INSPECT ACTUATOR
NOTICE:
Inspect the actuator with the transfer removed from the vehicle.
(a) Turn the ignition switch to ON.
(b) Check the operating sound produced by four wheel drive control switch operation and the differential
lock switch operation.
If the operating sound cannot be heard, check the four wheel control ECU and the wire harness in the next
step. When the wire harness and four wheel drive control ECU are normal, replace the actuator.
11. INSPECT WIRE HARNESS
(a) Disconnect the actuator connector and four wheel drive
control ECU connector.
(b) Check continuity of the wire harness between the four
wheel drive control ECU and the actuator.
Tester connectionSpecified condition
TM1 (A±2) ± TM1 (B±2)Continuity
TM2 (A±1) ± TM2 (B±1)Continuity
TL1 (A±41) ± TL1 (B±3)Continuity
TL2 (A±40) ± TL2 (B±4)Continuity
TL3 (A±39) ± TL3 (B±5)Continuity
HM2 (A±4) ± HM2 (B±7)Continuity
HM1 (A±3) ± HM1 (B±8)Continuity
P1 (A±10) ± CDL (B±9)Continuity
HL2 (A±42) ± HL2 (B±11)Continuity
HL1 (A±23) ± HL1 (B±12)Continuity
GND (A±7) ± GND (B±6)Continuity
GND (A±7) ± GND (B±10)Continuity
If continuity is not as specified, repair or replace the wire har-
ness.

F19566
TR±44
± TRANSFERONE TOUCH 2±4 SELECTOR SYSTEM
2982 Author: Date:
2005 SEQUOIA (RM1146U)
12. INSPECT FOUR WHEEL DRIVE CONTROL ECU
(a) Connect the wire harness side connector to the four wheel drive control ECU and inspect the wire har-
ness side connector from the back, as shown.
STANDARD VALUE OF ECU TERMINAL
Terminals (Symbols)ConditionSTD Voltage (V)
3 (HM1) ± 4 (HM2)

Ignition switch ON

Four wheel drive control switch ºH4º position " Four wheel drive control switch
ºL4º position
10 to 14 " 2 or less
or
4 (HM2) ± 3 (HM1)

Ignition switch ON

Four wheel drive control switch ºL4º position " Four wheel drive control switch
ºH4º position
or
0 (0.5 s) to 14 (50 ms)
pulse generation
2 (TM1) ± 1 (TM2)

Ignition switch ON

Differential lock switch is in ºOFFº position

Four wheel drive control switch ºH2º position " Four wheel drive control switch
ºH4º position
10 to 14 " 2 or less
or
1 (TM2) ± 2 (TM1)

Ignition switch ON

Keep pressing the differential lock switch for approx. 2 seconds to turn it ON

Four wheel drive control switch ºH4ºor ºL4º position " Four wheel drive control
switch ºH2º position
or
0 (0.5 s) to 14 (50 ms)
pulse generation
5 (DM1) ± 6 (DM2)
Ignition switch ON

A.D.D. FREE "A.D.D. LOCK10 to 14 " 2 or less
or
6 (DM2) ± 5 (DM2)
Ignition switch ON

A.D.D. LOCK "A.D.D. FREE
or
0 (0.5 s) to 14 (50 ms)
pulse generation
4 (HM2) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºH4º position " Four wheel drive control switch
ºL4º position
2 or less " 10 to 14
7 (GND) ± Body ground
Ignition switch OFFContinuity
12 (IG) ± 7 (GND)
Ignition switch ON10 to 14
18 (DL2) ± 7 (GND)
Ignition switch ON

A.D.D. LOCK "A.D.D. FREE0.88 or less " 10 to 14
19 (DL1) ± 7 (GND)
Ignition switch ON

A.D.D. FREE "A.D.D. LOCK0.88 or less " 10 to 14
23 (HL1) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºH4º position " Four wheel drive control switch
ºL4º position
10 to 14 " 1.5 or less
25 (2±4) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºL4º position " Four wheel drive control switch
ºH2º or ºH4º position
10 to 14 " 1.5 or less
26 (SPD) ± 7 (GND)
During drivingPulse generation

± TRANSFERONE TOUCH 2±4 SELECTOR SYSTEM
TR±45
2983 Author: Date:
2005 SEQUOIA (RM1146U)28 (IND3) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºH2º position " Four wheel drive control switch
ºL4º position
10 to 14 " 0 to 3.5
32 (LO) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºH2º position " Four wheel drive control switch
ºL4º position
10 to 14 " 1.5 or less
33 (DL) ± 7 (GND)

Ignition switch ON

Differential lock switch is in ºOFFº position " Keep pressing the differential lock
switch for approx. 2 seconds to turn it ON
10 to 14 " 1.5 or less
9 (ADD) ± 7 (GND)
Ignition switch ON

A.D.D. FREE "A.D.D. LOCK10 to 14 " 1.5 or less
39 (TL3) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºH2º position " Four wheel drive control switch
ºL4º position

Differential lock switch is in ºOFFº position " Keep pressing the differential lock
switch for approx. 2 seconds to turn it ON
1.5 or less " 10 to 14
40 (TL2) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºH2º position " Four wheel drive control switch
ºH4º position

Differential lock switch is in ºOFFº position " Keep pressing the differential lock
switch for approx. 2 seconds to turn it ON
10 to 14 " 1.5 or less
41 (TL1) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºH2º position " Four wheel drive control switch
ºH4º or ºL4º position

Differential lock switch is in ºOFFº position " ºONº position
1.5 or less " 10 to 14
42 (HL2) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºH4º position " Four wheel drive control switch
ºL4º position
1.5 or less " 10 to 14
45 (IND1) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºH2º position " Four wheel drive control switch
ºH4º or ºL4º position
10 to 14 " 0 to 3.5
46 (IND2) ± 7 (GND)

Ignition switch ON

Differential lock switch is in ºOFFº position " Keep pressing the differential lock
switch for approx. 2 seconds to turn it ON
10 to 14 " 0 to 3.5
48 (N) ± 7 (GND)
Ignition switch ON

Transmission shift lever: positions other than N" N1.5 or less " 10 to 14
50 (L4) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºH4º position " Four wheel drive control switch
ºL4º position
10 to 14 " 2 or less
10 (P1) ± 7 (GND)

Ignition switch ON

Four wheel drive control switch ºH2º position " Four wheel drive control switch
ºH4º or ºL4º position

Differential lock switch is in ºOFFº position " ºONº position
10 to 14 " 1.5 or less

SA140±10
± SUSPENSION AND AXLETROUBLESHOOTING
SA±1
2997 Author: Date:
2005 SEQUOIA (RM1146U)
TROUBLESHOOTING
PROBLEM SYMPTOMS TABLE
Use the table below to help you 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.
SymptomSuspect AreaSee page
Bottoming
1. Vehicle (Overloaded)
2. Spring (Weak)
3. Shock absorber (Worn)±
SA±63
SA±135
SA±66
SA±135
Sways/pitches
1. Tire (Worn or improperly inflated)
2. Stabilizer bar (Bent or broken)
3. Shock absorber (Worn)SA±3
SA±90
SA±149
SA±66
SA±135
Front wheel shimmy
1. Tire (Worn or improperly inflated)
2. Wheel (Out of balance)
3. Shock absorber (Worn)
4. Wheel alignment (Incorrect)
5. Ball joints (Worn)
6. Hub bearing (Loose or worn)
7. Steering linkage (Loose or worn)
8. Steering gear (Out of adjustment or broken)SA±3
SA±3
SA±66
SA±4
SA±83
SA±88
SA±21
±
SR±37
Abnormal tire wear
1. Tire (Improperly inflated)
2. Wheel alignment (Incorrect)
3. Shock absorber (Worn)
4. Suspension parts (Worn)SA±3
SA±4
SA±66
SA±139
±
Noise in front differential
1. Oil level (Low or wrong grade)
2. Excessive backlash between pinion and ring gear
3. Ring, pinion or side gear (Worn or chipped)
4. Pinion shaft bearing (Worn)
5. Side bearing (Worn)
6. Differential bearing (Loose or worn)SA±38
SA±50
SA±50
SA±50
SA±50
SA±50
Oil leak from front differential
1. Oil level (Too high or wrong grade)
2. Front differential rear oil seal (Worn or damaged)
3. Side gear oil seal (Worn or damaged)
4. Companion flange (Loose or damaged)
5. Side gear shaft (Damaged)SA±38
SA±38
SA±50
SA±50
SA±50
Noise in rear axle
1. Oil level (Low or wrong grade)
2. Excessive backlash between pinion and ring gear
3. Ring, pinion or side gear (Worn or chipped)
4. Pinion shaft bearing (Worn)
5. Axle shaft bearing (Worn)
6. Differential bearing (Loose or worn)SA±105
SA±109
SA±109
SA±109
SA±94
SA±109
Oil leak from rear axle1. Oil seal (Worn or damaged)
2. Rear axle housing (Cracked)SA±94
±
Oil leak from rear differential
1. Oil level (Too high or wrong grade)
2. Oil seal (Worn or damaged)
3. Companion flange (Loose or damaged)SA±105
SA±105
SA±109

SA28F±08
START
Preliminary Check
Tire pressure
Vehicle height
Brake dragging ROAD TEST
Does the vehicle lead/pull?
Cross switch front tire & wheel
assemblies (left & right).
Does the vehicle lead/pull in the
same direction as before?
Check front wheel alignment.
Is it within specification?
Adjust front wheel alignment.Reverse the front left side
tire and rebalance it.
Does the vehicle
lead/pull to the left?
COMPLETE
Are the tires uni±directional type?
Choose the position of front tire & wheel
assemblies where there is the least amount of pull.
Increase left front camber and decrease
right front camber until lead/pull is eliminated.Increase right front camber and decrease
left front camber until lead/pull is eliminated.
NO
YES
YES
NO
YES
YES
NO
YES
NO COMPLETE
NONOYES NOIs there steering
off center?
Adjust front tie rods.
NO
YES
Is the lead/pull stronger
than before?
YES
NOTICE : Do not exceed 1° of cross camber.
Do not exceed adjustment range.
Select a flat road where the vehicle can be driven in a straight line for 100 meters at a constant speed
of 35mph. Please confirm safety and set the steering wheel to its straight position. Drive the vehicle in
a straight line for 100 meters at a constant speed of 35mph without holding the steering wheel.
(1) The vehicle can keep straight but the steering wheel has some angle.
STEERING OFF CENTER (See page SR±10)
(2) The vehicle cannot keep straight.
STEERING PULL
YES NO
YES ROAD TEST
Does the vehicle still lead/pull?
NO ROAD TEST
Does the vehicle still lead/pull? ROAD TEST
Does the vehicle still lead/pull?
ROAD TEST
Does the vehicle still lead/pull?NO
Contact your local retail tire distributor.YES
*
*
SA±2
± SUSPENSION AND AXLETROUBLESHOOTING
2998 Author: Date:
2005 SEQUOIA (RM1146U)
REPAIR PROCEDURES
HINT:
This is a flow chart for vehicle pull.

SA17H±11
R03031
F13676
Front (A)(B)
R07928
± SUSPENSION AND AXLETIRE AND WHEEL
SA±3
2999 Author: Date:
2005 SEQUOIA (RM1146U)
TIRE AND WHEEL
INSPECTION
1. INSPECT TIRE
(a) Check the tires for wear and proper inflation pressure.
Cold tire inflation pressure:
Tire sizeFront
kPa (kgf/cm2, psi)
Rear
kPa (kgf/cm2, psi)
P245/70R16220 (2.2, 32)240 (2.4, 35)
P265/70R16220 (2.2, 32)220 (2.2, 32)
P265/65R17220 (2.2, 32)220 (2.2, 32)
(b) Using a dial indicator, check the tire runout.
Tire runout: 3.0 mm (0.118 in.) or less
2. ROTATING TIRE
HINT:

Rotate tires as shown in the illustration.

Rotate as shown in (B) if the spare tire is included in the
rotation.
3. INSPECT WHEEL BALANCE
(a) Check and adjust the Off±the±car balance.
(b) If necessary, check and adjust the On±the±car balance.
Imbalance after adjustment: 14.0 g (0.031 lb) or less
4. CHECK FRONT SUSPENSION FOR LOOSENESS
5. CHECK STEERING LINKAGE FOR LOOSENESS
6. CHECK BALL JOINT FOR LOOSENESS
7. CHECK SHOCK ABSORBER WORKS PROPERLY

Check if oil leaks.

Check the mounting bushings for wear.

Bounce front and rear of the vehicle.

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.

Z03382
± SUSPENSION AND AXLEFRONT WHEEL ALIGNMENT
SA±5
3001 Author: Date:
2005 SEQUOIA (RM1146U)
If the vehicle height is not as specified, try to adjust it by pushing
down on or lifting the body.
2. INSTALL CAMBER±CASTER±KINGPIN GAUGE OR
POSITION VEHICLE ON WHEEL ALIGNMENT TES-
TER
Follow the specific instructions of the equipment manufacturer.
3. INSPECT CAMBER, CASTER AND STEERING AXIS
INCLINATION
Camber, caster and steering axis inclination:

Camber
UCK35L±GKBSKA
Right±left error
UCK35L±GKBLKA
Right±left error
UCK45L±GKBSKA
Right±left error
UCK45L±GKBLKA
Right±left error
0°08' ± 45' (0.14° ± 0.75°)
30' (0.5°) or less
0°06' ± 45' (0.10° ± 0.75°)
30' (0.5°) or less
0°17' ± 45' (0.28° ± 0.75°)
30' (0.5°) or less
0°16' ± 45' (0.26° ± 0.75°)
30' (0.5°) or less

Caster (Except air suspension models)
UCK35L±GKBSKA
Tire size: P245/70R16
Tire size: P265/70R16 and P265/65R17
Right±left error
UCK35L±GKBLKA
Right±left error
UCK45L±GKBSKA
Right±left error
UCK45L±GKBLKA
Right±left error
2°56' ± 45' (2.93° ± 0.75°)
2°59' ± 45' (2.98° ± 0.75°)
30' (0.5°) or less
3°02' ± 45' (3.04° ± 0.75°)
30' (0.5°) or less
2°36' ± 45' (2.60° ± 0.75°)
30' (0.5°) or less
2°38' ± 45' (2.64° ± 0.75°)
30' (0.5°) or less