warning light LEXUS RX330 2006 Workshop Manual

STARTING AND DRIVING
460
Antilock brake system is not designed to shorten the
stopping distance: Always drive at a moderate speed
and maintain a safe distance from the vehicle in front of
you. Compared with vehicles without an antilock
brake system, your vehicle may require a longer
stopping distance in the following cases:
Driving on rough, gravel or snowcovered roads.
 Driving with tire chains installed.
 Driving over the steps such as the joints on the road.
 Driving on roads where the road surface is pitted or
has other differences in surface height.
Install all 4 tires of specified size at appropriate
pressure: The antilock brake system detects vehicle
speeds u sing the speed sensors for respective wheels’
turning speeds. The use of tires other than specified
may fail to detect the accurate turning speed resulting
in a longer stopping distance.“ABS” warning light
1U.S.A.2Canada
The light comes on when the ignition key is turned to the “ON”
position. If the anti−lock brake system and the brake assist
system work properly, the light turns off after a few seconds.
Thereafter, if either of the systems malfunctions, the light
comes on again.
When the “ABS” warning light is on (and the brake system
warning light is off), the anti −lock brake system, the brake
assist system, the traction control system and the vehicle
stability control system do not operate, but the brake system
still operates conventionally.
When the “ABS” warning light is on (and the brake system
warning light is off), the anti−lock brake system does not
operate so that the wheels could lock up during a sudden
braking or braking on slippery road surfaces.

STARTING AND DRIVING
461
If either of the following conditions occurs, this indicates
a malfunction somewhere in the components monitored
by the warning light system. Contact your Lexus dealer as
soon as possible to service the vehicle.

The light does not come on when the ignition key is turned
to the “ON” position, or remains on.
 The light comes on while you are driving.
A warning light turning on briefly during operation does not
indicate a problem.
CAUTION
If the “ABS” warning light remains on together with the
brake system warning light, immediately stop your
vehicle at a safe place and contact your Lexus dealer.
In this case, not only the antilock brake system will fail
but also the vehicle will become extremely unstable
during braking.
Drumindisc type parking brake system
Your vehicle has a drum−in−disc type parking brake system.
This type of brake system needs bedding −down of the brake
shoes periodically or whenever the parking brake shoes and/or
drums are replaced.
Have your Lexus dealer perform the bedding −down.

STARTING AND DRIVING
462
Brake assist system
If you slam the brakes on such as in an emergency or
apply the brakes more firmly than usual such as when
descending the hill with the designated number of
occupants in the vehicle, the brake assist system
provides more powerful braking.
If you slam the brakes on or apply the brakes more firmly, more
powerful braking will be applied. At this time, you may hear a
sound in the engine compartment and feel the vibrations of the
brake pedal. This does not indicate a malfunction.
The brake assist system becomes operative after the vehicle
has accelerated to a speed in excess of approximately 10 km/h
(6 mph). It stops operating when the vehicle decelerates to a
speed below approximately 5 km/h (3 mph).
For an explanation of this system’s warning light, see “ABS
warning light” on page 81 or 460.
TIRE PRESSURE WARNING SYSTEM
The tire pressure warning system is designed to provide
warning when tire inflation pressure is critically low while
the vehicle is moving. The low tire pressure warning light
comes on to inform you that such low tire pressure may
hamper driving.
This system is not designed to operate when the vehicle is
stopped. Therefore, check the tire inflation pressure regularly.
The recommended cold tire inflation pressure, tire size and the
vehicle capacity weight are on the tire and loading information
label. (For instructions, see “Checking tire inflation pressure”
on page 570.)
Installed tires should be of the specified size. They should be
of the same size and construction. If tires other than the
specified size are used, or if tires of different sizes or
constructions are mixed, the tire pressure warning system will
not function properly.

STARTING AND DRIVING
463
Low tire pressure warning light
This light comes on when the ignition key is turned to the “ON”
position. It goes off after a few seconds. This indicates that the
tire pressure warning system is functioning properly.
If the low tire pressure warning light comes on or blinks
while driving, do the following.
 If the warning light comes on: The tire pressure is critically
low. Adjust the tire inflation pressure to the specified level
as soon as possible. (See “Tires and wheels” on page 566.)
Once the ignition switch is turned off, the warning light also
goes off. If the light comes on again when the vehicle is started
after adjusting tire inflation pressure to the specified level, have
the system checked at your Lexus dealer. If you have a flat tire, replace it with the spare tire. For details,
see “If you have a flat tire” on page 500.

If the warning light blinks once every second: The low
tire pressure warning system may be malfunctioning.
Contact your Lexus dealer.
 If the warning light blinks twice every second: The low
tire pressure warning system needs to be initialized. Reset
the system with the tire pressure warning system reset
switch. (To reset the system, see “Tire pressure warning
system reset switch”.)
The tire pressure warning system does not function
properly under certain circumstances. In the following
cases, the low tire pressure warning light may not come
on even if the tire inflation pressure is low, or it may come
on when the tire inflation pressure is actually normal.
 A compact spare tire, snow tires, or tire chains are used.
 The tire inflation pressure is excessively higher than
specified, or tire inflation pressure suddenly drops due to
bursting or other causes.
 The vehicle is driven on a slippery road surface such as
rough or frozen roads.
 The vehicle speed is less than 30 km/h (19 mph) or more
than 100 km/h (62 mph), and the driving duration is less than
5 minutes.
 The tires differ in tread pattern or manufacturer.
 The tires are not the specified size.

STARTING AND DRIVING
464
The tread wear is very different among the installed tires.
 Rapid acceleration/deceleration or sharp turns is continue.
 Towing a trailer.
 The loading is over the limit or imbalanced.
 Initialization was not performed correctly after replacing or
rotating tires or wheels.
 The outside temperature is below 0 C (32F) or above
40 C (104 F).
CAUTION
When the tire pressure warning light comes on, observe
the following instructions:
 Adjust the tire inflation pressure to the specified level
as soon as possible.
 Avoid abrupt steering wheel maneuvering and
braking when the tire pressure warning light comes
on. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes, causing
death or serious injury.
Tire pressure warning system reset switch
The tire pressure warning system need to be initialized in
the following conditions:
When the low tire pressure warning light blinks twice
every second
 After replacing or rotating tires or wheels
When initializing the system, the present tire condition is
stored as a standard.
To initialize the system, perform the following:
1. Park the vehicle at a safe place and apply the parking brake.
Stop the engine.
2. Adjust the pressure of all the installed tires to the specified
level. (See “Tires and wheels” on page 566.)
3. Turn the ignition key to “ON”.

STARTING AND DRIVING
465
4. With the vehicle stopped, push the reset switch on the left
lower instrument panel and hold it until the low tire pressure
warning light blinks three times.
Initialization is
completed after driving at the speeds of 30 km/h
(19 mph) or over for about a few hours total, when the tire
pressure warning system detects the normal tire pressure. If
the following driving conditions are satisfied, initialization will
be completed in about one hour.
 Vehicle speed varies between 30 km/h (19 mph) and 80
km/h (50 mph)
 Normal road surface
When the warning light blinks twice every second while driving,
you may be unable to reset the system. In this case, set the
system again according to the above procedure.
Do not push the reset switch without adjusting the tire inflation
pressure to the specified level. Otherwise, the low tire
pressure warning light may not come on even if the tire
pressure is low, or it may come on when the tire inflation
pressure is actually normal.
If you push the reset switch while the vehicle is moving,
initialization is not performed.
If the low tire pressure warning light does not blink when you
push and hold the reset switch, have the low pressure warning
system checked at your Lexus dealer.
BRAKE PAD WEAR LIMIT INDICATORS
The brake pad wear limit indicators on your disc brakes
give a warning noise when the brake pads are worn to the
extent that replacement is required.
If you hear a squealing or scraping noise while driving, have the
brake pads checked and replaced by your Lexus dealer as
soon as possible. Expensive rotor damage can result if the
pads are not replaced when needed.

MAINTENANCE
530Battery
Check the battery condition by the indicator color. See page
601 for additional information.
Brake fluid level
Make sure the brake fluid level is correct. See page 568 for
additional information.
Engine oil level
Check the level on the dipstick with the engine turned off and
the vehicle parked on a level spot. See page 556 for
additional
information.
Power steering fluid level
Check the level through the reservoir. The level should be in
the “HOT” or “COLD” range depending on the fluid
temperature. See page 569 for additional information.
Exhaust system
If you notice any change in the sound of the exhaust or smell
exhaust fumes, have the cause located and corrected
immediately. (See “Engine exhaust caution” on page 384.)
Vehicle interior
Items listed below should be checked regularly, e.g. while
performing periodic services, cleaning the vehicle, etc.
Lights
Make sure the headlight, stop lights, tail lights, turn signal
lights, and other lights are working. Check headlight aim.
Service reminder indicators and warning buzzers
Check that all service reminder indicators and warning buzzers
function properly.
Steering wheel
Check that it has the specified free play. Be alert for changes
in steering condition, such as hard steering, excessive free
play or strange noise.
Seats
Check that all front seat controls such as seat adjusters,
seatback recliner, etc., operate smoothly. Check that the head
restraints move up and down smoothly and that the locks hold
securely in any latched position. For folding −down rear
seatbacks, check that the latches lock securely.
Seat belts
Check that the seat belt system such as buckles, retractors
and anchors operate properly and smoothly. Make sure the
belt webbing is not cut, frayed, worn or damaged.

CHASSIS
590
REPLACING WHEELS
When to replace your wheels
If you have wheel damage such as bending, cracks or
heavy corrosion, the wheel should be replaced.
If you fail to replace a damaged wheel, the tire may slip off the
wheel or cause loss of handling control.
Replacement with used wheels is not recommended as they
may have been subjected to rough treatment or high mileage
and could fail without warning. Also, bent wheels which have
been straightened may have hidden structural damage and
therefore should not be used. Never use an inner tube in a
leaking wheel which is designed for a tubeless tire.
Wheel selection
When replacing wheels, care should be taken to ensure
that they are equivalent to those removed in load capacity,
diameter, rim width, and offset.
Correct replacement wheels are available at your Lexus
dealer.
A wheel of a different size or type may adversely affect
handling, wheel and bearing life, brake cooling,
speedometer/odometer calibration, stopping ability, headlight
aim, bumper height, vehicle ground clearance, and tire or snow
chain clearance to the body and chassis.
CAUTION
Observe the following instructions. Otherwise, an
accident may occur resulting in death or serious
injuries.
 Do not use wheels other than the manufacturer’s
recommended size, as this may cause dangerous
handling characteristics resulting in loss of control.
 Fourwheel drive models:
Do not use wheels of different brands, sizes and
types, as this may cause dangerous handling
characteristics resulting in loss of control.
Initial adjustment of the tire pressure warning system is
necessary after you have replaced your wheels. See “Tire
pressure warning system” on page 462.

ELECTRICAL COMPONENTS
599
No.FUSEAMPERECIRCUIT
41 STOP10
Tail lights, high mounted
stoplight, rear light failure
warning light, anti−lock brake
system, vehicle stability control
system, traction control system,
brake assist system,
electronically modulated air
suspension, shift lock control
system, multiport fuel injection
system/sequential multiport fuel
injection system
42 TI&TE30Tilt and telescopic steering
43 MPXB7.5No circuit
44 AM17.5Starter system
45 RR FOG7.5No circuit
46 AIR SUS7.5Electronically modulated air
suspension
47 DOOR
NO. 225Multiplex communication system
48 S/ROOF30Moon roof
No.FUSEAMPERECIRCUIT
49 TAIL10
Front fog lights, instrument
cluster lights, instrument panel
lights, front side marker lights,
tail lights, license plate lights,
towing converter
50 PANEL7.5
Glove box light, instrument
cluster lights, instrument panel
lights, console box light, audio
system, power outlet, garage
door opener switch,
electronically controlled
automatic transmission system,
headlight cleaner, electronically
modulated air suspension, seat
heaters, steering switches,
power back door

ELECTRICAL COMPONENTS
600
No.FUSEAMPERECIRCUIT
51 ECUIGNO. 17.5
Power rear view mirror control,
moon roof, multiplex
communication system,
navigation system display, shift
lock control system, multiplex
communication system (power
door lock system, wireless
remote control system), driving
position memory system, vehicle
stability control system, traction
control system, windshield
wipers, electronically controlled
automatic transmission, seat
heaters, power seats, tilt and
telescopic steering, power back
door, electronically modulated air
suspension
52 ECUIGNO. 210
Automatic headlight leveling
system, vehicle stability control
system, dynamic laser cruise
control, headlight cleaner,
adaptive front −lighting system
53 HEATER7.5
Electric cooling fan, air
conditioning system, rear
window defogger, ignition switch,
windshield wiper de −icer
No.FUSEAMPERECIRCUIT
54 WASHER20Windshield washer
55 SEAT HTR20Seat heaters
56 GAUGE
NO. 17.5
Instrument cluster lights,
instrument panel lights,
emergency flashers, seat belt,
power outlet, rear light failure
warning light, multiport fuel
injection system/sequential
multiport fuel injection system,
back− up lights
57 FR WIP30Windshield wipers
58 RR WIP15Rear window wiper
59 INJ20Multiport fuel injection
system/sequential multiport fuel
injection system
60 IGN10
SRS airbag system, multiport
fuel injection system/sequential
multiport fuel injection system,
front passenger occupant
classification system, stop lights
61 GAUGE
NO. 27.5Gauge and meters