TOYOTA SEQUOIA 2001 Service Repair Manual

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NOTICE

If the vehicle height is changed fre-
quently when the vehicle is heavily
loaded, the compressor may over-
heat, causing the vehicle height ad-
justment operation to stop.

Before you lower the vehicle height
with the height select switch, check
under the vehicle to make sure
nothing to damage the vehicle or
no one to be injured is there and
that the underbody of the vehicle
does not touch the ground.

After unloading, the height of a ve-
hicle equipped with the rear height
control air suspension becomes
slightly higher than the normal ve-
hicle height. Take sufficient care
where the overhead height is re-
stricted.

Do not select ªLOº mode for bumpy
roads. If the underbody of the ve-
hicle touches the road surface, the
vehicle may be damaged.
If you attempt to adjust the vehicle height
with anything such as snow, ice, or stones
in contact with the vehicle body, the ve-
hicle height may not change. In this case,
stop the vehicle, press the mode select
switch, and check that manual control
mode indicator light comes on. Then, re-
move the obstruction.
CAUTION
If you drive through water, set the
vehicle height to ªHIº with the height
select switch and then change to
manual control mode by pushing the
mode select switch. Do not exceed 30
km/h (18 mph) or ªHIº mode will au-
tomatically change to ªNº mode. Do
not drive through water deeper than
about 700 mm (28 in.) even if the
vehicle height is in ªHIº mode.
NOTICE

When jacking up or installing tire
chains, be sure to set manual con-
trol mode by pushing the mode se-
lect switch and stop the engine.
Otherwise, the vehicle height may
change because of the automatic
leveling function, resulting in an ac-
cident.

If your vehicle must be towed, set
the vehicle height to ªNº and
change to manual control mode.
Otherwise, the vehicle height may
change because of the automatic
leveling function, resulting in an ac-
cident.

If your vehicle gets stuck in a
ditch, set manual control mode by
pushing the mode select switch.
Otherwise, the vehicle height may
change because of the automatic
leveling function, resulting in an ac-
cident.

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(d) Indicator lights
1. Height control indicator lights
2. Manual control mode indicator light
When the ignition switch is turned on, all
the indicator lights come on. The indicator
light showing the present mode only re-
mains on and all other lights go off after
a few seconds. This means the system
operates correctly.If you change the vehicle height mode,
the indicator lights change as follows:
When changing the vehicle height from
ªNº mode to ªHIº:
1. The ªNº mode indicator light goes off
and the ªHIº mode indicator light blinks.
2. After the vehicle height control reaches
ªHIº mode, the ªHIº mode indicator light
remains on.If the underbody of the vehicle has
touched the surface on bumpy roads or
the area around the rear suspension is
coated with ice, the vehicle height cannot
be changed with the height select switch.
In this case, move the vehicle or remove
the ice around the rear suspension. The
vehicle height will change to the selected
mode, after a while, when the ignition
switch is turned to the ªONº position.
In the following cases, there is a problem
somewhere in you rear height control air
suspension. Although there is no problem
to continue normal driving, have the rear
height control air suspension checked by
your Toyota dealer as soon as possible.

The height control indicator light and
manual control mode indicator light do
not come on when the ignition switch
is turned on.

The manual control mode indicator light
blinks.

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(e) Parking and stopping tips
If you immediately stop the engine to park
the vehicle after off±road driving, the ve-
hicle height is lowered slightly as the ve-
hicle becomes cool. When parking, make
sure there is nothing that will be in con-
tact with the underbody of the vehicle.
When you start the engine, the vehicle
returns to the previous height.
If you park the vehicle for a long time,
the vehicle height may be gradually low-
ered. When parking for a long time, make
sure there is nothing that will be in con-
tact with the underbody of the vehicle.
When you start the engine, the vehicle
returns to the previous height.
If you stop the engine, the vehicle height
may change in accordance with the
change in the temperature. When you
start the engine, the vehicle returns to the
previous height.(f) Rear height control failure warning
If there is a problem somewhere in the
rear height control air suspension, ªNº
mode is automatically selected. If this oc-
curs, the manual control mode indicator
light blinks and the vehicle height control
cannot be activated until the malfunction
is corrected. If this is the case, bring your
vehicle to your Toyota dealer as soon as
possible and have it checked.
(a) Selecting manual control mode
To select manual control mode, push
the mode select switch with the vehicle
stopped. The manual control mode indi-
cator light comes on and the vehicle
height is fixed at the current height.
The height can be adjusted by pushing
the height select switch.
The selected height is memorized in the
system even after the engine is stopped.
If you push the mode select switch again,
the manual control mode indicator light
goes out and automatic control mode is
selected.
ÐManual control mode

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In manual control mode, the automatic lev-
eling function is turned off. When the ve-
hicle height is changed because of the
conditions (load etc.), you can adjust the
vehicle height with the height select
switch.
In manual control mode, if the vehicle
speed exceeds 30 km/h (18 mph), auto-
matic control mode is activated and ªNº is
selected automatically.
If you attempt to adjust the vehicle height
with anything such as snow, ice, or stones
in contact with the vehicle body, the ve-
hicle height may not change. In this case,
stop the vehicle and remove the obstruc-
tion.
CAUTION
If you drive through water, set the
vehicle height to ªHIº with the height
select switch and then change to
manual control mode by pushing the
mode select switch. Do not exceed 30
km/h (18 mph) or ªHIº mode will au-
tomatically change to ªNº mode. Do
not drive through water deeper than
about 700 mm (28 in.) even if the
vehicle height is in ªHIº mode.
NOTICE

When jacking up or installing tire
chains, be sure to set manual con-
trol mode by pushing the mode se-
lect switch and stop the engine.
Otherwise, the vehicle height may
change because of the automatic
leveling function, resulting in an ac-
cident.

If your vehicle must be towed, set
the vehicle height to ªNº in auto-
matic control mode, then select
manual control mode by pushing
the mode select switch. Otherwise,
the vehicle height may change be-
cause of the automatic leveling
function, resulting in an accident.

If your vehicle gets stuck in a
ditch, set manual control mode with
the mode select switch. Otherwise,
the vehicle height may change be-
cause of the automatic leveling
function, resulting in an accident.
(b) Vehicle height adjustment
To change the vehicle height in manual
mode, push the height select switch on
either side of ª
º (higher) or ªº
(lower).
A higher vehicle height is suitable when
driving on bumpy roads and through water.
A lower vehicle height allows for easy
access to the vehicle (getting in and out)
and easy loading and unloading.
When you are driving on bumpy roads,
which may cause the suspension to fully
elongate, the rear height control air sus-
pension may not operate.

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To raise the vehicle heightÐ
Push the ª
º side of the switch for two
seconds or more. Each time you push the
switch, the vehicle height increases. When
the vehicle height is about 20 mm (0.8
in.) higher than the standard height, the
ªHIº indicator light comes on.
The maximum selectable height is about
40 mm (1.6 in.) higher than the standard
height.
To lower the vehicle heightÐ
Push the ªº side of the switch. Each
time you push the switch, the vehicle
height decreases.
Two±wheel drive modelsÐ
When the vehicle height is about 7.5 mm
(0.3 in.) lower than the standard height,
the ªLOº indicator light comes on.
The minimum selectable height is about
15 mm (0.6 in.) lower than the standard
height.
Four±wheel drive modelsÐ
When the vehicle height is about 15 mm
(0.6 in.) lower than the standard height,
the ªLOº indicator light comes on.
The minimum selectable height is about
30 mm (1.2 in.) lower than the standard
height.If the underbody of the vehicle has
touched the surface on bumpy roads, the
vehicle height cannot be lowered with the
height select switch.
When adjusting the vehicle height with
one or more doors open, make sure that
there is nothing that might come into con-
tact with the vehicle body or around the
doors.
If the vehicle height is adjusted on the
slope, or with the selector lever in a posi-
tion other than ªPº or ªNº while the vehicle
is stopped, you may hear a sound caused
by the expansion and contraction of the
propeller shaft. This does not indicate a
malfunction.
CAUTION
The higher vehicle height should be
only set for severe off±road driving
conditions. Because the vehicle's cen-
ter of gravity is higher in this setting,
the vehicle may become unstable
when turning abruptly, resulting in an
accident.
NOTICE

When lowering the vehicle, the ve-
hicle must be stopped. Otherwise,
when the vehicle speed exceeds 30
km/h (18 mph), automatic control
mode is activated and ªNº is se-
lected automatically. Proper caution
should be taken in places where the
overhead height is limited.

If the vehicle height is changed fre-
quently when the vehicle is heavily
loaded, the compressor may over-
heat, causing the vehicle height ad-
justment operation to stop.

Before you lower the vehicle height
with the height select switch, check
under the vehicle to make sure
nothing to damage the vehicle or
no one to be injured is there and
that the underbody of the vehicle
does not touch the ground.

After unloading, the height of a ve-
hicle equipped with the rear height
control air suspension becomes
slightly higher than the normal ve-
hicle height. Take sufficient care
where the overhead height is re-
stricted.

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Do not lower the vehicle height for
bumpy roads. If the underbody of
the vehicle touches the road sur-
face, the vehicle may be damaged.
(c) Indicator lights
1. Height control indicator lights
2. Manual control mode indicator light
When the ignition switch is turned on, all
the indicator lights come on. The indicator
light showing the present mode only re-
mains on and all other lights go off after
a few seconds. This means the system
operates correctly.When you change the vehicle height in
manual mode, the height control indicator
light changes as follows:
Two±wheel drive models
ªHIº: 20 mm (0.8 in.) or higher than the
standard height
ªNº: Between ±7.5 mm (0.3 in.) and 20
mm (0.8 in.) of the standard
height
ªLOº: Lower than ±7.5 mm (0.3 in.) of
the standard height
Four±wheel drive models
ªHIº: 20 mm (0.8 in.) or higher than the
standard height
ªNº: Between ±15mm (0.6 in.) and 20
mm (0.8 in.) of the standard
height
ªLOº: Lower than ±15 mm (0.6 in.) of
the standard height

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In the following cases, there is a problem
somewhere in you rear height control air
suspension. Although there is no problem
to continue normal driving, have the rear
height control air suspension checked by
you Toyota dealer as soon as possible.

The height control indicator light and
manual control mode indicator light do
not come on when the ignition switch
is turned on.

The manual control mode indicator light
blinks.
(d) Parking and stopping tips
If you immediately stop the engine to park
the vehicle after off±road driving, the ve-
hicle height is lowered slightly as the ve-
hicle becomes cool. When parking, make
sure there is nothing that will be in con-
tact with the underbody of the vehicle.
If you park the vehicle for a long time,
the vehicle height may be gradually low-
ered. When parking for a long time, make
sure there is nothing that will be in con-
tact with the underbody of the vehicle.
If you stop the engine, the vehicle height
may change in accordance with the
change in the temperature.(e) Rear height control failure warning
If there is a problem somewhere in the
rear height control air suspension, the
manual control mode indicator light blinks.
If this is the case, change to the automat-
ic control mode by pushing the mode se-
lect switch, and bring your vehicle to your
Toyota dealer as soon as possible to have
it checked.The tire pressure warning system is de-
signed to provide warning when tire
inflation pressure of one or more of
your tires (including the spare tire) is
low. The low tire pressure warning light
comes on to inform you that low tire
inflation pressure may hamper driving.
Tire pressure warning
systemÐ

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LOW TIRE PRESSURE WARNING LIGHT
This light comes on when the ignition key
is turned to the ªONº position. It goes off
after a few seconds. This indicates that
the tire pressure warning system is func-
tioning properly.If the low tire pressure warning light
comes on or blinks, do the following.
If the warning light comes on:
Stop your vehicle in a safe place as
soon as possible and check that the
inflation pressure of all tires (including
the spare tire) is as specified on the
tire and loading information label. (See
ªChecking tire inflation pressureº on
page 429 in Section 7±2.) If the warning
light comes on even after tire inflation
pressure adjustment, you may have a
flat tire. If you have a flat tire, replace
it with the spare tire. For details, see
ªIf you have a flat tireº on page 387 in
Section 4.
The warning light goes off a few minutes
after air is put into the deflated tire.
This warning light may turn on due to
natural causes such as natural air leaks
or tire pressure changes caused by tem-
perature. In this case, adjusting the tire
pressure will turn off the warning light.
CAUTION
When the tire pressure warning light
comes on, observe the following in-
structions:

Depending on the conditions, re-
duce to an appropriate speed as
soon as possible.

Adjust the tire pressure to the spe-
cified level as soon as possible.

Avoid abrupt steering wheel maneu-
vering and braking. Tire deteriora-
tion may reduce steering wheel con-
trol and brake effectiveness. This
may lead to serious injury or death.

The tire pressure warning system
may not activate immediately if sud-
den bursts of air leakage occur.

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NOTICE

Do not use liquid sealants for a flat
tire as air pressure sensors will be
damaged.

When the tires must be repaired or
replaced, have them repaired or re-
placed by the nearest Toyota dealer
or authorized tire dealer. The tire
pressure sensors will be affected by
the installation or removal of tires.

The tire pressure warning system is
not to be used as a substitute for
regular inspections. Be sure to
check the air pressure in the tires
on a regular basis.

When the tires must be replaced,
replace the grommets for air pres-
sure sensors as well.
If the warning light blinks:
The tire pressure warning system may
be malfunctioning. Contact your Toyota
dealer.
SYSTEM MALFUNCTION
The tire pressure warning system does
not function properly under certain cir-
cumstances. In the following cases, the
low tire pressure warning light may not
come on even if the tire inflation pres-
sure is low, or it may come on when
the tire inflation pressure is actually
normal.

Electric devices or facilities using simi-
lar radio wave frequencies are nearby.

A radio set to similar frequencies is in
use.

A lot of snow or ice covers the ve-
hicle, in particular, around the wheels
or wheel housings.

The tires are not equipped with an air
pressure sensor.

Snow tires or tire chains are used.

Non±genuine Toyota wheels are used.

The sensor battery is expired.

Radio waves from the air pressure sen-
sor installed on the spare tire cannot
be received.
CAUTION

The use of non±genuine wheels will
cause the air pressure sensors to
transmit the electronic code in dif-
ferent manner, resulting in the sys-
tem failure.

The use of different type of tires
with genuine wheels may also
cause the malfunction of the sys-
tem.

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CAUTION
When the tire pressure monitoring
system warning light is lit, one or
more of your tires is significantly un-
der±inflated. You should stop and
check your tires as soon as possible,
and inflate them to the proper pres-
sure as indicated on the vehicle's tire
information placard. Driving on a sig-
nificantly under±inflated tire causes
the tire to overheat and can lead to
tire failure. Under±inflation also re-
duces fuel efficiency and tire tread
life, and may affect the vehicle's han-
dling and stopping ability. Each tire,
including the spare, should be
checked monthly when cold and set
to the recommended inflation pres-
sure as specified in the vehicle plac-
ard and owner 's manual.
For vehicles sold in U.S.A.
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions:
(1) This device may not cause harmful
interference, and (2) this device must
accept any interference received, includ-
ing interference that may cause unde-
sired operation.