2001 TOYOTA SEQUOIA differential

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

PR01H±04
F19347Matchmarks
R04164
SST
± PROPELLER SHAFTPROPELLER SHAFT ASSEMBLY (2WD)
PR±3
2986 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
REMOVE PROPELLER SHAFT
(a) Place matchmarks on the differential and propeller shaft
flanges.
(b) Remove the 4 nuts and washers.
(c) Pull out the propeller shaft yoke from the transmission.
(d) Insert SST in the transmission to prevent oil leakage.
SST 09325±40010

PR05N±04
Z15303Matchmarks
Q07228
Matchmarks
F13575
Matchmarks
± PROPELLER SHAFTPROPELLER SHAFT ASSEMBLY (4WD)
PR±7
2990 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. REMOVE FRONT PROPELLER SHAFT
(a) Place matchmarks on the differential and propeller shaft
flange.
(b) Remove the 4 nuts, washers and bolts, and disconnect
the propeller shaft from the differential.
(c) Suspend the front side of the propeller shaft.
(d) Place matchmarks on the transfer and propeller shaft
flanges.
(e) Remove the 4 nuts and washers.
(f) Remove the propeller shaft from the transfer.
2. REMOVE REAR PROPELLER SHAFT
(a) Place matchmarks on the transfer and propeller shaft
flanges.
(b) Remove the 4 nuts and washers, and disconnect the pro-
peller shaft from the transfer.
(c) Suspend the front side of the propeller shaft.
(d) Place matchmarks on the differential and propeller shaft
flanges.
(e) Remove the 4 nuts, washers and bolts.
(f) Remove the propeller shaft from the differential.

PR07N±02
Z15303
Matchmarks
F13575
Matchmarks
Q07228
Matchmarks
± PROPELLER SHAFTPROPELLER SHAFT ASSEMBLY (4WD)
PR±9
2992 Author: Date:
2005 SEQUOIA (RM1146U)
INSTALLATION
1. INSTALL FRONT PROPELLER SHAFT
(a) Align the matchmarks on the propeller shaft flanges and
differential, and connect the flanges with the 4 bolts,
washers and nuts.
(b) Torque the 4 bolts.
Torque: 74 N´m (750 kgf´cm, 54 ft´lbf)
(c) Align the matchmarks on the propeller shaft flanges and
transfer, and connect the flanges with the 4 washers and
nuts.
(d) Torque the 4 nuts.
Torque: 88 N´m (897 kgf´cm, 65 ft´lbf)
2. INSTALL REAR PROPELLER SHAFT
(a) Align the matchmarks on the propeller shaft flanges and
differential, and connect the flanges with the 4 bolts,
washers and nuts.
(b) Torque the 4 bolts.
Torque: 88 N´m (897 kgf´cm, 65 ft´lbf)
(c) Align the matchmarks on the propeller shaft flanges and
transfer, and connect the flanges with the 4 washers and
nuts.
(d) Torque the 4 nuts.
Torque: 88 N´m (897 kgf´cm, 65 ft´lbf)

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

SA24L±03
F06624
R12863
SST
R13233
± SUSPENSION AND AXLEFRONT DRIVE SHAFT
SA±31
3027 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. REMOVE FRONT WHEEL
2. REMOVE ENGINE UNDER COVER
3. DRAIN DIFFERENTIAL OIL
4. REMOVE DRIVE SHAFT LOCK NUT
(a) Using a screwdriver and hammer, remove the grease cap.
(b) Remove the cotter pin and lock cap.
(c) While applying the brakes, remove the lock nut.
5. DISCONNECT LOWER SUSPENSION ARM FROM
LOWER BALL JOINT
(a) Remove the cotter pin and nut.
(b) Using SST, disconnect the lower suspension arm from the
lower ball joint.
SST 09628±62011
6. DISCONNECT DRIVE SHAFT FROM STEERING
KNUCKLE
(a) Using a plastic hammer, disengage the drive shaft from
the axle hub.
(b) Push the steering knuckle outward and disconnect the
drive shaft from the steering knuckle.
NOTICE:
Be careful not to damage the oil seal, boots and dust seal.
7. LH drive shaft:
REMOVE LH SHOCK ABSORBER (See page SA±64)

SA14I±10
SA±36
± SUSPENSION AND AXLEFRONT DRIVE SHAFT
3032 Author: Date:
2005 SEQUOIA (RM1146U)
INSTALLATION
1. INSTALL DRIVE SHAFT TO DIFFERENTIAL
(a) Install a new snap ring to the inboard joint shaft.
(b) Apply gear oil to the inboard joint shaft and differential case sliding surface.
(c) Set the snap ring with opening side facing downward.
(d) Using a brass bar and hammer, install the drive shaft.
NOTICE:
Be careful not to damage the dust cover and oil seal.
HINT:
Whether the inboard joint shaft is in contact with the pinion shaft or not can be known from the sound or feel-
ing when driving.
(e) Check that there is 2 ± 3 mm (0.08 ± 0.12 in.) of play in the axial direction.
(f) Check that the drive shaft cannot be removed by hand.
2. LH drive shaft:
INSTALL LH SHOCK ABSORBER (See page SA±70)
3. CONNECT DRIVE SHAFT TO STEERING KNUCKLE
NOTICE:
Be careful not to damage the oil seal, boots and dust seal.
4. CONNECT LOWER SUSPENSION ARM TO LOWER BALL JOINT
(a) Connect the lower suspension arm to the lower ball joint.
(b) Install the nut and a new cotter pin.
If the holes for the cotter pin are not aligned, tighten the nut further up to 60°.
HINT:
Face the hole for the cotter pin forward.
Torque: 140 N´m (1,450 kgf´cm, 103 ft´lbf)
5. INSTALL DRIVE SHAFT LOCK NUT
(a) While applying brakes, install the nut.
Torque: 235 N´m (2,400 kgf´cm, 173 ft´lbf)
(b) Install the lock cap and a new cotter pin.
If the holes for the cotter pin are not aligned, tighten the nut further up to 60°.
6. FILL DIFFERENTIAL WITH HYPOID GEAR OIL (See page SA±38)
7. INSTALL ENGINE UNDER COVER
8. INSTALL FRONT WHEEL
Torque: 110 N´m (1,150 kgf´cm, 83 ft´lbf)