2007 Lexus GX470 parking brake

95
2-1. Driving procedures
2
When driving
Starting the engine
■Turning the key from “ACC” to “LOCK”
■Ignition switch
“LOCK”:
The steering wheel is locked
and the key can be removed.
“A C C ” :
Some electrical components
such as the audio system can be
used.
“ON”:
All electrical components can
be used.
“START”:
For starting the engine.
■Starting the engine
Check that the parking brake is set.
Turn off unnecessary lights and accessories.
Check that the shift lever is set in “P”.
Sit in the driver’s seat and firmly depress the brake pedal.
Turn the ignition switch to the “START” position to start the
engine.
STEP1
STEP2
STEP3
STEP4
STEP5
Shift the shift lever to “P”.
Push in the key and turn to the
“LOCK” position.STEP1
STEP2

102
2-1. Driving procedures
Parking brake
NOTICE
■Before driving
Fully release the parking brake.
Driving the vehicle with the parking brake set will lead to brake components over-
heating, which may affect braking performance and increase brake wear.
Sets the parking brake
Fully set the parking brake
while depressing the brake
pedal
Releases the parking
brake
CanadaU.S.A.

112
2-3. Operating the lights and windshield wipers
■Daytime running light system
To make your vehicle more visible to other drivers, the front turn signal lights turn on
automatically whenever the engine is started and the parking brake is released.
■Headlight control sensor
■Automatic light off system
The headlights and tail lights turn off 30 seconds after a door is opened or closed if
the ignition switch is turned to the “ACC ” or “LOCK” position while the headlights
are turned on. (The lights turn off immedi ately if the “LOCK” button on the key is
pressed after all doors are locked.)
To turn the lights on again, turn the igniti on switch to the “ON” position, or turn the
light switch “OFF” once and th en back to the or position.
■Customization
Settings (e.g. light sensor sensitivity) can be changed. ( P. 400)
NOTICE
■To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not running.
The sensor may not function properly if an
object is placed on the sensor, or anything
that blocks the sensor is affixed to the wind-
shield.
Doing so interferes with the sensor detecting
the level of ambient light and may cause the
automatic headlight system to malfunction.

147
2-5. Driving information
2
When drivingSelecting snow chains
Use the correct snow chain size when mounting the snow chains. Chain size
is regulated for each tire sizes.
Side chain:0.20 in. (5.0 mm)
1.81 in. (46.0 mm)
0.71 in. (18.0 mm)
Cross chain:
0.25 in. (6.3 mm)
1.5 in. (38.1 mm)
0.89 in. (22.6 mm)
Regulations on the use of snow chains
● Regulations regarding the use of tire chains vary according to location
and type of road. Always check local regulations before installing
chains.
● Install the chains on the rear tires.
● Retighten the chains after driving 1 /4 - 1 /2 mile (0.5 - 1.0 km).
■When driving the vehicle
Accelerate the vehicle slowly and dr ive at a reduced speed suitable
to road conditions.
■ When parking the vehicle
Park the vehicle and move the shift lever to “P” without setting the
parking brake. The parking brake may freeze, preventing it from
being released.

159
2-5. Driving information
2
When driving
●Always place wheel blocks under both the vehicle and the trailer
wheels when parking. Apply the pa rking brake firmly, and put the
transmission in “P”. Avoi d parking on a slope, but if unavoidable, do so
only after performing the following:
Apply the brakes and keep them applied.
Have someone place wheel blocks under both the vehicle and
trailer wheels.
When the wheel blocks are in pl ace, release the brakes slowly
until the blocks absorb the load.
Apply the parking brake firmly.
Shift into “P” and turn off the engine.
● When restarting after parking on a slope:
With the transmission in the “P” position, start the engine. Be sure
to keep the brake pedal pressed.
Shift into “3”, “2”, “L”, or “R” position (if reversing).
Release the parking brake and br ake pedal, and slowly pull or
back away from the wheel blocks. Stop and apply the brakes.
Have someone retrieve the blocks.
CAUTION
■To avoid an accident
●Do not exceed 45 mph (72 km/h) or the posted towing speed limit, whichever is
lower. A instability (swaying) of the towing vehicle-trailer combination increases
as speed increases, exceeding 45 mph (72 km/h) may cause loss of control.
●Slow down and downshift before descending steep or long downhill grades. Do
not make sudden downshifts.
●Avoid holding the brake pedal down too long or applying the brakes too fre-
quently.
This could cause the brakes to overheat and result in reduced braking efficiency.
STEP1STEP1
STEP2STEP2
STEP1STEP3STEP3
STEP1STEP4STEP4
STEP1STEP5STEP5STEP5
STEP1STEP1
STEP2STEP2
STEP1STEP3STEP3
STEP1STEP4STEP4

328
4-3. Do-it-yourself maintenance
FuseAmpereCircuit
12IG1 NO.210
Rear air conditioning system, inside
rear view mirror, kinetic dynamic sus-
pension system
13RR WSH15Rear window washer
14ECU-IG10
Shift lock control system, power win-
dows, outside rear view mirror defog-
ger, anti-lock brake system, active
traction control system, vehicle stabil-
ity control system, air conditioning
system, navigation system, power
windows, moon roof, tilt and tele-
scopic steering, trip information dis-
play, driving position memory system,
rear view monitor system, tire pres-
sure warning system
15IG110
Air conditioning system, back-up
lights, rear window defogger, seat
heaters, vehicle stability control sys-
tem
16STA7. 5
Multiport fuel injection system/
sequential multiport fuel injection
system
17P FR P/W20Front passenger's power window
18P RR P/W20Rear right side power window
19D RR P/W20Rear left side power window
20PA N E L10Instrument panel lights
21TA I L10Parking lights, tail lights, license plate
lights, front fog lights

5
When trouble arises
339
5-1. Essential information
Towing eyelets
■Emergency towing procedureRelease the parking brake.
Put the shift lever in “N”.
The ignition switch must be in the “ACC” position (engine off) or the “ON”
position (engine on).
CAUTION
■Caution while towing
●Use extreme caution when towing the vehicle.
Avoid sudden starts or erratic driving maneuvers which place excessive stress on
the emergency towing eyelet and the cable or chain.
●If the engine is not running, the power assi st for the brakes and steering will not
function, making steering and braking more difficult.
●Put the vehicle height in the “N” (normal) mode and push the height control
“OFF” switch to turn off rear height co ntrol air suspension. Otherwise the auto-
matic leveling function may adjust the vehicle height unexpectedly, resulting in an
accident.
NOTICE
■To prevent causing serious damage to the transmission
Never tow this vehicle from the rear with four wheels on the ground.
STEP1
STEP2
STEP3

5
When trouble arises
347
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
The following warning indicates a possible problem in the brake system.
Immediately stop the vehi cle in a safe place and contact your Lexus
dealer.
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Brake system warning light
•Low brake fluid
• Malfunction in the brake system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released, the system is operating normally.
Calmly perform the following actions if any of the warning lights turn on or
flash. If a light turns on or flashes, bu t then turns off, this does not necessar-
ily indicate a malfunction in the system.