ECU LEXUS LS430 2005 Service Manual

OCCUPANT RESTRAINT SYSTEMS
220
CAUTION
When using the lower anchorages for the child
restraint system, be sure that there are no irregular
objects around the anchorages or that the seat belt is
not caught.
 Push and pull the child restraint system in different
directions to be sure it is secure. Follow all the
installation instructions provided by its
manufacturer.
 When using the lower anchorages for a child restraint
system, ensure that the seat is moved to the
rearmost position, with the seatback close to the
child restraint system.
 After securing the child restraint system, never slide
the seat.
DRIVING POSITION MEMORY SYSTEM
A microcomputer will memorize the position of the driver’s
seat, the height of the head restraint of the driver’s seat, the
seat cushion length of the driver’s seat, the height of the
shoulder belt anchor of the driver’s seat belt, and the positions
of the tilt and telescopic steering, and outside rear view mirrors.
Three dif ferent driving position profiles can be entered into the
computer’s memory.
Recording a driving position in the computer’s memory can
only be done when the ignition switch is in the “ON” position
and the selector lever is in the “N” or “P” position.
Setting the driving position
16L299
1. Adjust the driver’s seat, driver’s head restraint height
and seat cushion length, driver’s shoulder belt anchor, tilt
and telescopic steering and outside rear view mirrors to
the desired position.

STEERING WHEEL AND MIRRORS
235
16L784
To ensure correct functioning of antiglare mirror sensors
located on both sides of the mirror, do not touch or cover
the sensors with your finger or a piece of cloth, etc.
157.VANITY MIRRORS
Front
14L206
To use the front vanity mirrors, swing the sun visor down
and open the cover.
The vanity light comes on when you open the cover. However
if the sun visor is not hooked securely, the light may not come
on.

AUDIO
277
(h) If the satellite radio tuner malfunctions
When
problems occur with the XM tuner, a message will appear on the display. Referring to the table below to identify the problem,
take the suggested corrective action.
ANTENNA
The XM antenna is not connected. Check whether the XM antenna cable is \
attached securely.
A short−circuit occurs in the antenna or the surrounding antenna cable. See a L\
exus certified
dealer.
UPDATING
You have not subscribed to the XM satellite radio. The radio is being up\
dated with the latest
encryption code. Contact the XM satellite radio for subscription inform\
ation. When a contact is
canceled, you can choose the “CH000” and all free −to− air channels.
The premium channel you selected is not authorized. Wait for about 2 seconds until the radio
returns to the previous channel or “CH001”. If it does not change\
automatically, select another
channel. If you want to listen to the premium channel, contact the XM s\
atellite radio.
NO SIGNALThe XM signal is too weak at the current location. Wait until your vehicle reaches a location
with a stronger signal.
LOADINGThe unit is acquiring audio or program information. Wait until the unit has received the informa-
tion.
OFF AIRThe channel you selected is not broadcasting any programming. Select an\
other channel.
−−−−−There is no song/program title or artist name/feature associated with th\
e channel at that time.
No action needed.
−−−
The channel you selected is no longer available. Wait for about 2 seconds until the radio re-
turns to the previous channel or “CH001”. If it does not change a\
utomatically, select another
channel.
The XM Listener Care Center is also available on the phone, please call \
(800) 852 −9696 during the following hours:
Monday – Saturday: 7 a.m. – 1 a.m. Sunday: 12 p.m – 12 a.m.

STARTING AND DRIVING
299
31L346a
When you enter the vehicle carrying a sm art key and push
the ignition switch, the electronic code in the key is
automatically checked as to whether it corresponds to the
registered ID code for the vehicle. The key indicator light
comes on, the steering column lock is released, and the
engine immobilizer system is cancelled.
At this time, the security indicator light goes off and you can
start the engine when you turn the ignition switch and the key
indicator light does not come on. When you turn the ignition
switch, turn it slowly and surely. If you turn it quickly, it may
become stuck. To free it, see the following “If the ignition switch
seems to be stuck”.
If you push the ignition switch when the smart key is not within
the effective range of the smart key system, a warning tone
sounds and “Key is not Detected” appears on the display. If the ignition switch seems to be stuck:
To free the ignition switch, perform the following:
31L638
1. Push the ignition switch.
31L639
2. Be sure to push the ignition switch while turning the
steering wheel slightly in either direction, and then turn
the switch.

STARTING AND DRIVING
314
(e) Parking
31L325
 1Parking brake pedal 2Brake pedal
3“P” (Park) position
1. Bring the vehicle to a complete stop.
2. Depress the parking brake pedal fully to securely apply the
parking brake.
3. With the brake pedal held down with your foot, shift the
selector lever to the “P” position.
CAUTION
Never attempt to move the selector lever into “P” under
any circumstances while the vehicle is moving. Serious
mechanical damage and loss of vehicle control may
result.
(f) Good driving practice
 If the transmission repeatedly shifts up and down between
fourth and overdrive gears when climbing a gentle slope,
shift the selector lever to the “4” position. Be sure to shift the
selector lever to the “D” position after climbing the slope.
 When towing a trailer, in order to maintain efficient engine
braking and electrical charging performance, do not use
overdrive. The selector lever must be in the “4” position.
CAUTION
Always keep your foot on the brake pedal while stopped
with the engine running. This prevents the vehicle from
creeping.
NOTICE
Always use the brake pedal or the parking brake to hold
the vehicle on an upgrade. Do not attempt to hold the
vehicle using the accelerator pedal, as this can cause
the transmission to overheat.

STARTING AND DRIVING
326
31L357
Check surroundings for safety.
If a bright light (for example, sunlight reflected off the vehicle
body) is picked up by the camera, the smear effect* peculiar
to the camera may occur.
*: Smear effect — A phenomenon that occurs when a bright
light (for example, sunlight reflected off the vehicle body) is
picked up by the camera; when transmitted by the camera, the
light source appears to have a vertical streak above and below
it.
CRUISE CONTROL
The cruise control allows you to cruise the vehicle at a
desired speed over about 40 km/h (25 mph) with your foot
off the accelerator pedal.
Your cruising speed can be maintained although a slight speed
change may occur when driving up or down a gradient, within
the limits of engine performance. On steeper hills, a great
speed change will occur so it is better to drive without the cruise
control.
When the cruise control is on, the driving pattern of the
automatic transmission is fixed in the normal position,
regardless of the position of the selector switch.
CAUTION
 To help maintain maximum control of your vehicle,
do not use the cruise control when driving in heavy
or varying traffic, or on slippery (rainy, icy or
snowcovered) or winding roads.
 Avoid vehicle speed increases when driving
downhill. If the vehicle speed is too fast in relation to
the cruise control set speed, cancel the cruise
control then downshift the transmission to use
engine braking to slow down.

DRIVING TIPS
383
CAUTION
Before driving off, make sure the parking brake is
fully released and that the parking brake reminder
light is off.
 Do not leave your vehicle unattended while the
engine is running.
 Do not rest your foot on the brake pedal while driving.
It can cause dangerous overheating, needless wear,
and poor fuel economy.
 To drive down a long or steep hill, reduce your speed
and downshift. Remember, if you ride the brakes
excessively, they may overheat and not work
properly. See page 311.
 Be careful when accelerating, upshifting,
downshifting or braking on a slippery surface. The
abrupt change in engine speed, such as sudden
acceleration or engine braking, could cause the
vehicle to skid or spin.
 Do not drive in excess of the speed limit. Even if the
legal speed limit permits it, do not drive over 140 km/h
(85 mph) unless your vehicle has highspeed
capability tires. Driving over 140 km/h (85 mph) may
result in tire failure, loss of control and possible
injury. Be sure to consult a tire dealer to determine
whether the tires on your vehicle are highspeed
capability tires or not before driving at such speeds.
 Do not continue normal driving when the brakes are
wet. If they are wet, your vehicle will require a longer
stopping distance, and it may pull to one side when
the brakes are applied. Also, the parking brake will
not hold the vehicle securely.

DRIVING TIPS
388
Hitches
If you wish to install a trailer hitch, your Lexus dealer should
be consulted.
 Use only a hitch which is recommended by Lexus dealer
and conforms to the total trailer weight requirement.
 Follow the directions supplied by the hitch manufacturer.
Lubricate the hitch ball with a light coat of grease.
 Lexus recommends removing the trailer hitch whenever
you are not towing a trailer to reduce the possibility of
additional damage caused by the hitch if your vehicle is
struck from behind. After re moving the hitch, seal any
mounting holes in the vehicle body to prevent entry of
pollutants such as exhaust fumes, dirt, water, etc.
NOTICE
 Install the trailer hitch using only the position
recommended by your Lexus dealer. Do not install
the trailer hitch on the bumper; this may cause body
damage.
 Do not use axlemounted hitches as they can cause
damage to the axle housing, wheel bearings, wheels
or tires.
Brakes and safety chains
 Lexus recommends trailers with brakes that conform to
any applicable federal and state/provincial regulations.
 A safety chain must always be used between the towing
vehicle and the trailer. Leave sufficient slack in the
chain for turns. The chain should cross under the
trailer tongue to prevent the tongue from dropping to
the ground in case it becomes damaged or separated.
For correct safety chain procedures, follow the hitch or
trailer manufacturer’s recommendations.
CAUTION
If the total trailer weight exceeds 450 kg (1000 lb.),
trailer brakes are required.
 Never tap into your vehicle’s hydraulic system as it
will lower its braking effectiveness.
 Never tow a trailer without using a safety chain
securely attached to both the trailer and the vehicle.
If damage occurs to the coupling unit or hitch ball,
there is possible danger of the trailer wandering over
into another lane.

DRIVING TIPS
389
Tires
Ensure that your vehicle’s tires are properly inflated. Adjust
the tire inflation pressure to the recommended cold tire
inflation pressure indicated below:
Tire inflation pressure, kPa (kgf/cm
2 or bar, psi)
P225/55R17 95H Front 220 (2.2, 32) Rear 220 (2.2, 32)
245/45R18 96W Front 230 (2.3, 33) Rear 230 (2.3, 33)
P245/45R18 96V Front 230 (2.3, 33) Rear 230 (2.3, 33)
 The trailer tires should be inflated to the pressure
recommended by the trailer manufacturer in respect to the
total trailer weight.
Trailer lights
 Trailer lights must comply with federal, state/provincial and
local regulations. See your local recreational vehicle dealer
or rental agency for the correct type of wiring and relays for
your trailer. Check for correct operation of the turn signals
and stop lights each time you hitch up. Direct splicing may
damage your vehicle’s electrical system and cause a
malfunction of your lights.
Breakin schedule
 Lexus recommends that you do not tow a trailer with a new
vehicle or a vehicle with any new power train component
(engine, transmission, differential, wheel bearing, etc.) for
the first 800 km (500 miles) of driving.
Maintenance
 If you tow a trailer, your vehicle will require more frequent
maintenance due to the additional load. For this
information, please refer to the scheduled maintenance
information in the “Owner’s Manual Supplement /
Scheduled Maintenance”.
 Retighten all fixing bolts of the towing ball and bracket after
approximately 1000 km (600 miles) of trailer driving.
Pretowing safety check
 Check that your vehicle remains level when a loaded or
unloaded trailer is hitched. Do not drive if the vehicle has
an abnormal nose −up or nose− down condition, and check
for improper tongue load, overload, worn suspension or
other possible causes.
 Make sure the trailer cargo is securely loaded so that it
cannot shift.
 Check that your rear view mirrors conform to any federal,
state/provincial or local regulations. If they do not, install
required rear view mirrors appropriate for towing purposes.

DRIVING TIPS
394
Towing capacity:907 kg (2000 lb.)
Towing capacity means the maximum gross trailer
weight (trailer weight plus its cargo weight) that your
vehicle is able to tow.
Cargo capacity
Cargo capacity may increase or decrease depending on
the size (weight) and the number of occupants. For
details, see “Capacity and distribution” that follows.
CAUTION
Do not apply the load more than each load limit.
That may cause not only damage to the tires, but
also deterioration to the steering ability and
braking ability, which may cause an accident.
CARGO AND LUGGAGE
Stowage precautions
When stowing cargo and luggage in the vehicle,
observe the following:
 Put cargo and luggage in the trunk when at all
possible. Be sure all items are secured in place.
 Be careful to keep the vehicle level. Placing the
weight as far forward as possible helps maintain
vehicle balance.
 For better fuel economy, do not carry unnecessary
weight.
CAUTION
Do not place anything on the package tray
behind the rear seatback. Such items may be
thrown about and possibly injure people in the
vehicle during sudden braking or in an
accident.
 Do not drive with objects left on top of the
instrument panel. They may interfere with the
driver’s field of view. Or they may move during
sharp vehicle acceleration or turning, and
impair the driver’s control of the vehicle. In an
accident they may injure the vehicle occupants.