tow TOYOTA SEQUOIA 2001 Service Repair Manual

I18
Ignition
SW
A23552
ECM
STOPSTP
ALT
BatteryE4
16 G±Y
J/C1 S14 Stop Light SW
2
G±W
BR7
Stop
Light
LH
R8
Stop
Light
RH3
5
8W±R
A W
High
Mounted
Stop Light
W±B 1L
1 1F
7
F10
Fusible
Link
BlockInstrument
Panel J/B1
4EG±Y
4B8
Brake Inhibit Relay
G±Y 4
See VSC System 2
W
J19
J/CB
C
IC
CC
C
4
BD1
1
22
1H9 H9(*1)
(*2) (*1)(*2)
BD2
12 J/C
A1
4
G±W IG2
*1: w/o Rear Spoiler
*2: w/ Rear Spoiler AM2
To Towing
Converter Relay
W±BST1±
E4 15
4C 4A1
1
3
L±B Sub J/B No.4
2
IGN1 B±O2
4D2
4A
1E 17
2 1C
1 A
J44J11
J/C J10
J
J33
J34 C
3
IJ
52C
2D 11
AM2
B W±RB±R
6
Instrument
Panel J/B
BP1
4 G±W B±O
G±W
G±W G±WSub J/B No.4
J10
J45
4
BJ J57
J/CA
W±BW±B G±W
High
Mounted
Stop LightG±WJ20
J/C G±W H
Engine Room
J/B DI±284
± DIAGNOSTICSENGINE
478 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

D14137
Refill Plug
Overflow Plug
D14142Control Shaft Lever
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±525
719 Author: Date:
2005 SEQUOIA (RM1146U)
(h) Remove the overflow plug and check the fluid level.
Standard:
When ATF overflowsATF level is higher than specification
(Go to step (k))
When ATF does not overflow
ATF level is equal to or lower than
specification
(Go to step (i))
HINT:

ºOverflowº indicates the condition under which ATF
drains out from the overflow tube.

The capacity of the overflow tube is approximately 3 cc.
If the amount of drained ATF is little, only the fluid remain-
ing in the tube has drained out. This condition is not con-
sidered as ºoverflowº.
(i) Remove the refill plug.
(j) Add ATF through the refill hole until it flows out from the
overflow hole.
Fluid type: Toyota genuine ATF WS
(k) When the draining ATF has become a trickle, install the
overflow plug with a new gasket.
(l) Install the refill plug if removed.
(m) Lower the vehicle.
(n) Turn the ignition switch off to stop the engine.
2. CHECK FLUID CONDITION
If the fluid smells burnt or is black, replace it (see step 6).
3. INSPECT AND ADJUST SHIFT LEVER POSITION
(a) When shifting the shift lever from the N position to other
positions, check that the lever can be shifted smoothly
and accurately to each position and that the position indi-
cator comes on in accordance with the shift lever position.
If the indicator and shift lever position do not match, carry out
the following adjustment procedures.
(1) Remove the nut and disconnect the shift control
cable from the control shaft lever.
(2) Move the control shaft fully rearward.
(3) Return the control shaft lever 2 notches to the N
position.
(4) Set the shift lever to the N position.
(5) Connect the shift control cable and temporarily
install the control shaft lever nut.
(6) While holding the shift lever lightly toward the R
position side, tighten the control shaft lever nut.
Torque: 14.5 N´m (148 kgf´cm, 11 ft´lbf)

DI±666
± DIAGNOSTICSAUTOMATIC TRANSMISSION
860 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P2740 Transmission Fluid Temperature Sensor ºBº
Circuit
DTC P2742 Transmission Fluid Temperature Sensor ºBº
Circuit Low Input
DTC P2743 Transmission Fluid Temperature Sensor ºBº
Circuit High Input
CIRCUIT DESCRIPTION
ATF (Automatic Transmission Fluid) temperature sensor No.2 is on the transmission and just in front of the
oil cooler inlet pipeline.
If ECM detects the abnormally high temperature of ATF by this sensor, it draws driver's attention by illuminat-
ing the warning lamp.
HINT:

The temperature of ATF easily rises when towing, climbing hills and in traffic, etc.

If the ATF temperature sensor No.2 becomes short±circuited, the signal that indicates the ATF temper-
ature is 150C (302F) or higher is input in ECM.
Vehicle conditions when the sensor is normal and when the sensor is short±circuited are indicated
in the table below.
ATF temperature Sensor No.2
StateDetection ConditionSymptomRecovery Condition

AT fluid temp. more than 150C
(302F).
AT Oil Temp. warning light re-
mains on
AT fluid temp. less than 135C
(275F). *2

AT fluid temp. more than 130C
(266F).
Shift point too high.
AT fluid temp. less than 110C
(230F).
Sensor is normalWhen the conditions (a) and (b)
are satisfied.
(a) AT fluid temp. more than 130C
(266F).
(b) Engine coolant temp. more
than 95C (203F).

Lock±up at 3rd gear. *1
AT fluid temp. less than 110C
(230F) *2 and engine coolant
temp. less than 95C (203F).
Sensor is short±circuited

Any conditions.

AT Oil Temp. warning light re-
mains on

Shift point too high.

Symptoms still occur
Sensor is short circuited

Engine coolant temp. more than
95C (203F).
Lock±up at 3rd gear. *1
Symptoms still occur
HINT:
*1: When AT fluid temperature is normal, transmission locks up at 5th gear with the shift lever in D position
and at 4th gear with the shift lever in 4 position.
*2: When AT fluid temperature is in normal range, it decreases to less than 135C (275F) within 5 minutes
with the shift lever in P or N position in an idling state.
DIDJN±01

BE2820
Multi±path:
BE2821
Fade Out:
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2175
2369 Author: Date:
2005 SEQUOIA (RM1146U)
(2) Multi±path
A radio signal can sometimes be reflected by an ob-
struction in its path. When this occurs, the reflected
signal may interfere with the direct signal sent from
the transmitter. This phenomenon is known as ºMul-
ti±pathº.
(3) Fade out
FM radio frequency is higher than AM. Therefore, it
is more likely to be reflected by large obstructions
such as tall buildings or mountains. For this reason,
the FM signal will gradually weaken or disappear
when the vehicle is behind such obstructions. This
phenomenon is known as ºfade outº.
(d) Noise problem
It is very important for a technician to understand the specifics of the noise problem. To diagnose the
symptom, use the table below.
Radio FrequencyNoise occurrence conditionPresumable cause
AMNoise occurs in a specified areaForeign noise
AMNoise occurs when listening to an intermittent
broadcastAn identical program transmitted from multiple
towers can cause noise where the signals over-
lap
AMNoise occurs only at nightMusic beat from a far±off broadcast
FMNoise occurs while driving in a specified areaMulti±path or phasing noise resulting from a
change in FM frequency
HINT:
If the noise does not fall into any category in the table above, determine the cause using ºRadio reception
problemsº above. Refer to the multi±path and phasing sections.

B10035
Metallic Type
SST
Insert Retainer
(at 4 places)
B10036
Metallic Type
Pull Connector
B10485
Metallic Type
Push
B10485
Metallic Type
Pull
± SFISFI SYSTEM
SF±5
2739 Author: Date:
2005 SEQUOIA (RM1146U)
(3) Turn the SST, align the retainers inside the connec-
tor with the SST chamfered parts and insert the SST
into the connector.
(4) While holding the SST, pull the connector towards
the SST to put the retainers on the SST chamfered
parts.
(5) Slide the SST and connector together towards the
fuel tube assembly.
(h) Observe the following when connecting the fuel tube con-
nector (metallic type):
(1) Check if there is any damage or foreign objects in
the connected part of the pipe.
(2) Match the axis of the connector with the axis of the
pipe, and push into the connector until a ºclickº
sound is heard. If the connection is tight, apply a
small amount of fresh engine oil on the tip of the
pipe.
(3) After finishing the connection, pull the pipe and the
connector to ensure it is secure.
(4) Check to make sure no fuel leak is present.
If the result is not specified, repair or replace.
(i) Observer the following when handling the nylon tube:
(1) Pay attention not to turn the connected part of the
nylon tube and the quick connector with tube when
connecting them.
(2) Pay attention not to kink the nylon tube.
(3) Do not remove the nylon tube.
(4) Do not close the piping with the nylon tube by bend-
ing it.

B07053
Vacuum Hose
Fuel Return Hose
SF0Y0±10
B17759
SF±22
± SFIFUEL PRESSURE REGULATOR
2756 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
REMOVE FUEL PRESSURE REGULATOR
(a) Disconnect the vacuum hose from intake air resonator.
(b) Disconnect the fuel return hose from the pressure regula-
tor.
CAUTION:
Put a shop towel under the pressure regulator.
(c) Remove the 2 bolts, and pull out the pressure regulator.
(d) Remove the O±ring from the pressure regulator.

SA145±08
R13215
SST
R13275
SST
SST SA±24
± SUSPENSION AND AXLEFRONT AXLE HUB
3020 Author: Date:
2005 SEQUOIA (RM1146U)
DISASSEMBLY
1. 2WD:
REMOVE GREASE CAP
(a) Mount the axle hub in a soft jaw vise.
HINT:
Close the vise until it holds hub bolts. Do not tighten further.
(b) Using a screwdriver, remove the grease cap.
2. 4WD:
REMOVE OIL SEAL (INSIDE)
(a) Mount the axle hub in a soft jaw vise.
HINT:
Close the vise until it holds hub bolts. Do not tighten further.
(b) Using a screwdriver, remove the oil seal (inside).
3. 2WD:
REMOVE LOCK NUT AND SPEED SENSOR ROTOR
(a) Using a chisel and hammer, loosen the staked part of the
lock nut.
NOTICE:
Be careful not to damage the bushing.
(b) Using SST, remove the lock nut.
SST 09318±12010
(c) Remove the speed sensor rotor.
NOTICE:
Take care not to scratch the serration of the speed sensor
rotor.
4. REMOVE AXLE HUB FROM STEERING KNUCKLE
(a) Remove the 4 bolts and shift the dust cover towards the
hub side (outside).
(b) Using SST, remove the axle hub from the steering
knuckle.
SST 09710±30021 (09710±03051),
09950±40011 (09951±04020, 09952±04010,
09953±04020, 09954±04010, 09955±04031,
09957±04010, 09958±04011)
(c) Remove the dust cover from the steering knuckle.
(d) 4WD:
Remove the bearing spacer and speed sensor rotor.
NOTICE:
Take care not to scratch the serration of the speed sensor
rotor.
5. REMOVE OIL SEAL (OUTSIDE)
Using a screwdriver, remove the oil seal (outside) from the
steering knuckle.
6. REMOVE BEARING FROM STEERING KNUCKLE
(a) Using snap ring pliers, remove the snap ring.

SA0355
SST
0.3 ± 0.3 mm
(0.012 ± 0.012 in.)
SA23O±04
FA1121
F14731
FA1124
SA±50
± SUSPENSION AND AXLEFRONT DIFFERENTIAL CARRIER
3046 Author: Date:
2005 SEQUOIA (RM1146U)
REASSEMBLY
1. INSTALL NEW BEARINGS
Using SST and a press, install 2 new bearings.
SST 09950±60010 (09951±00380)
Bearing press in depth:
0.3 ± 0.3 mm (0.012 ± 0.012 in.)
2. ASSEMBLE DIFFERENTIAL CASE
(a) Install the 2 thrust washers on the side gears.
(b) Install the 2 side gears, pinion gears, pinion gear thrust
washers and pinion shaft in the differential case.
HINT:
Align the holes for the straight pin in the differential case and
pinion shaft.
(c) Measure the side gear backlash.
(1) Install the intermediate shaft No. 1 to the differential
case.
(2) Using a dial indicator, measure the side gear back-
lash while holding one pinion gear toward the differ-
ential case.
Backlash: 0 ± 0.20 mm (0 ± 0.0079 in.)
If the backlash is not within the specified value, replace the side
gear thrust washer with an appropriate thickness.
HINT:
Refer to the following table to select thrust washers which will
ensure that the backlash is within the specified value.
Washer thickness:
Thickness mm (in.)Thickness mm (in.)
0.96 ± 1.04 (0.0378 ± 0.0409)1.16 ± 1.24 (0.0457 ± 0.0488)
1.06 ± 1.14 (0.0417 ± 0.0449)1.26 ± 1.34 (0.0496 ± 0.0528)
(3) Remove the intermediate shaft No. 1.
3. INSTALL STRAIGHT PIN AND STAKE DIFFERENTIAL
CASE
(a) Using a pin punch and hammer, install the straight pin
through the differential case and hole in the pinion shaft.
(b) Stake the differential case.
4. INSTALL RING GEAR ON DIFFERENTIAL CASE
(a) Clean the contact surfaces of the differential case and
ring gear.

W00493
35 mm (1.38 in.)
SA24F±03
R04321
R04322
R04463
± SUSPENSION AND AXLEREAR DIFFERENTIAL CARRIER
SA±113
3109 Author: Date:
2005 SEQUOIA (RM1146U)
DISASSEMBLY
1. CHECK COMPANION FLANGE RUNOUT
Using a dial indicator, measure the vertical and lateral runout of
the companion flange.
Maximum: runout: 0.09 mm (0.0035 in.)
If the runout exceeds the maximum, replace the companion
flange.
2. CHECK RING GEAR RUNOUT
Using a dial indicator, measure the ring gear runout.
Maximum runout: 0.05 mm (0.0020 in.)
If the runout exceeds the maximum, replace the ring gear.
3. CHECK RING GEAR BACKLASH
Using a dial indicator, while holding the companion flange, mea-
sure the ring gear backlash.
Backlash: 0.13 ± 0.18 mm (0.0051 ± 0.0071 in.)
HINT:
Measure at 3 or more positions around the circumference of the
ring gear.
If the backlash is not within the specified value, adjust the side
bearing preload or repair as necessary.
4. CHECK TOOTH CONTACT BETWEEN RING GEAR
AND DRIVE PINION (See page SA±119)
5. CHECK SIDE GEAR BACKLASH
Using a dial indicator, measure the side gear backlash while
holding one pinion gear toward the case.
Backlash: 0.05 ± 0.20 mm (0.0020 ± 0.0079 in.)
If the backlash is not within the specified value, replace the side
gear thrust washer of the different thickness (See page
SA±119).

FA1121
SA24G±03
FA1123
FA1124
R13423
SST
SST
SSTSST
± SUSPENSION AND AXLEREAR DIFFERENTIAL CARRIER
SA±119
3115 Author: Date:
2005 SEQUOIA (RM1146U)
REASSEMBLY
1. ASSEMBLE DIFFERENTIAL CASE
(a) Install the 2 thrust washers to the side gears.
(b) Install the 2 side gears with the thrust washers, 2 pinion
gears, 2 pinion gear thrust washers and pinion shaft.
HINT:
Align the holes for the straight pin in the differential case and
pinion shaft.
(c) Using a dial indicator, measure the side gear backlash
while holding one pinion gear toward the differential case.
Backlash: 0.05 ± 0.20 mm (0.0020 ± 0.0079 in.)
If the backlash is not within the specified value, replace the side
gear thrust washer with an appropriate thickness.
HINT:
Refer to the following table to select thrust washers which will
ensure that the backlash is within the specified value.
Washer thickness:
Thickness mm (in.)Thickness mm (in.)
1.50 (0.0590)1.75 (0.0689)
1.55 (0.0610)1.80 (0.0709)
1.60 (0.0630)1.85 (0.0728)
1.65 (0.0650)1.90 (0.0748)
1.70 (0.0669)±
(d) Using a pin punch and hammer, install the straight pin
through the holes in the differential case and pinion shaft.
(e) Using a chisel and hammer, stake the outside of the differ-
ential case pin hole.
2. INSTALL SIDE BEARINGS
Using SST and a press, install the 2 side bearings into the differ-
ential case.
SST 09950±60010 (09951±00510),
09950±60020 (09950±00680),
09950±70010 (09951±07150)
3. INSTALL RING GEAR ON DIFFERENTIAL CASE
(a) Clean the contact surfaces of the differential case and
ring gear.