2004 Lexus GX470 park assist

For detailed information, refer to the description given in each Section.
PICTORIAL INDEX
x
Page
1Driving position memory switches 200. . . . . . . . . . .
2Power window switches 43. . . . . . . . . . . . . . . . . . . . . . .
3Power door lock switch 22. . . . . . . . . . . . . . . . . . . . . . .
4Window lock switch 44. . . . . . . . . . . . . . . . . . . . . . . . . . .
5Power rear view mirror control switches 205. . . . . .
6Side vents 228. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7Headlight, turn signal and
fog light switches 29, 31, 32. . . . . . . . . . . . . . . . . . . . . .
8Wiper and washer switch 32. . . . . . . . . . . . . . . . . . . . . .
9Center vents 228. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10Emergency flasher switch 46. . . . . . . . . . . . . . . . . . . . .
11Car audio 235. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12Multi-information display 67. . . . . . . . . . . . . . . . . . . . . .
13Automatic air conditioning controls 215. . . . . . . . . .
14Rear window defogger switch 40. . . . . . . . . . . . . . . . . .
15Front passenger's seat belt reminder light 58. . . . . .
16Glove box 84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17Ashtray 79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18Cigarette lighter 79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19Seat heater switches 47. . . . . . . . . . . . . . . . . . . . . . . . . . Page
20Four-wheel drive control lever 373. . . . . . . . . . . . . . .
21Automatic transmission selector lever 365. . . . . . . .
22Parking brake lever 363. . . . . . . . . . . . . . . . . . . . . . . . .
23Center differential lock switch 373. . . . . . . . . . . . . . .
24Power outlet (12 VDC) 81. . . . . . . . . . . . . . . . . . . . . . . . .
25Downhill assist control switch 393. . . . . . . . . . . . . . .
26Electronic modulated suspension
control switch 387. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27Rear height control air suspension
switches 380. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28Ignition switch 361. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
292nd STRTº switch 373. . . . . . . . . . . . . . . . . . . . . . . . . .
30Cruise control switch 377. . . . . . . . . . . . . . . . . . . . . . .
31Steering pad switches 256. . . . . . . . . . . . . . . . . . . . . . .
32Hood lock release lever 99. . . . . . . . . . . . . . . . . . . . . . .
33Fuel filler door opener 100. . . . . . . . . . . . . . . . . . . . . . .
34Instrument panel light control dial 73. . . . . . . . . . . . . .
35Outside rear view mirror defogger switch 42. . . . . . .
36Power outlet (115 VAC) main switch 81. . . . . . . . . . . .

For detailed information, refer to the description given in each Section.
PICTORIAL INDEX
xii
Page
1Automatic transmission second start
indicator light 373. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2Unengaged Parkº warning light 61. . . . . . . . . . . . . . .
3Automatic transmission fluid temperature
warning light 62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4Low washer fluid warning light 65. . . . . . . . . . . . . . . . .
5Automatic transmission indicator lights 365. . . . . .
6Driver's seat belt reminder light 58. . . . . . . . . . . . . . . .
7Turn signal indicator light 31. . . . . . . . . . . . . . . . . . . . .
8Brake system warning light 57. . . . . . . . . . . . . . . . . . . .
9Headlight high beam indicator light 31. . . . . . . . . . . .
10ABSº warning light 60. . . . . . . . . . . . . . . . . . . . . . . . . .
11Open door warning light 61. . . . . . . . . . . . . . . . . . . . . . .
12Tachometer 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13Headlight indicator light 29. . . . . . . . . . . . . . . . . . . . . . .
14Cruise control indicator light 377. . . . . . . . . . . . . . . .
15Engine oil replacement reminder light 64. . . . . . . . . .
16Engine coolant temperature gauge 52. . . . . . . . . . . . . Page
17Discharge warning light 63. . . . . . . . . . . . . . . . . . . . . . .
18Low engine oil pressure warning light 64. . . . . . . . . .
19Malfunction indicator lamp 59. . . . . . . . . . . . . . . . . . . .
20Slip indicator light 389, 391, 394, 396. . . . . . . . . . . . .
21Vehicle stability control system off
indicator light 391. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22Center differential lock indicator light 373. . . . . . . .
23VSC TRACº warning light 63. . . . . . . . . . . . . . . . . . . . .
24Downhill assist control system
indicator light 393. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25Rear height control indicator lights 386. . . . . . . . . . .
26Security indicator light 14, 26. . . . . . . . . . . . . . . . . . . .
27SRS warning light 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28Trip meter reset knob 55. . . . . . . . . . . . . . . . . . . . . . . . .
29Odometer and trip meter 55. . . . . . . . . . . . . . . . . . . . . .
30Low fuel level warning light 65. . . . . . . . . . . . . . . . . . . .
31Fuel gauge 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3 ± 1
355
STARTING AND DRIVING
Starting and driving
Three-way catalytic converters356 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine exhaust caution359 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before starting the engine361 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition switch with steering lock361 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking brake363 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to start the engine363 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic transmission365 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Four-wheel drive system373 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise control377 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear height control air suspension380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic modulated suspension387 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Active traction control system388 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle stability control system390 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Downhill assist control system393 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hill-start assist control system396 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake system398 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake pad wear limit indicators402 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limited-slip differential403 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STARTING AND DRIVING
402
Brake assist system
When you slam the brakes on, the brake assist system
judges as an emergency stop and provides more powerful
braking for a driver who cannot hold down the brake pedal
firmly.
When you slam the brakes on, 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).
The brake assist system may not work for about 60 seconds
after the engine is started.
For an explanation of this system's warning light, see ABS
warning lightº on page 60.
Drum-in-disc 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.
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.

DRIVING TIPS
408
OPERATION IN FOREIGN
COUNTRIES
If you plan to drive your Lexus in another country...
First, comply with the vehicle registration laws.
Second, confirm the availability of the correct fuel (unleaded
and minimum octane rating).
TIPS FOR DRIVING IN VARIOUS
CONDITIONS
Always slow down in gusty crosswinds. This will allow you
much better control.
Drive slowly onto curbs and, if possible, at a right angle.
Avoid driving onto high, sharp-edged objects and other
road hazards. Failure to do so can lead to severe tire
damage such as a tire burst.
Drive slowly when passing over bumps or travelling on a
bumpy road. Otherwise, the impact could cause severe
damage to the tires and/or wheels.
When parking on a hill, turn the front wheels until they touch
the curb so that the vehicle will not roll. Apply the parking
brake, and place the transmission in Pº. If necessary, block
the wheels.
Washing your vehicle or driving through deep water may get
the brakes wet. To see whether they are wet, check that
there is no traffic near you and then press the pedal lightly.
If you do not feel a normal braking force, the brakes are
probably wet. To dry them, drive the vehicle cautiously while
lightly pressing the brake pedal with the parking brake
applied. If they still do not work safely, pull to the side of the
road and call a Lexus dealer for assistance.

IN CASE OF AN EMERGENCY
440If you are unsure about how to follow this procedure, we
strongly recommend that you seek help from your Lexus
dealer, Roadside Assistance or Customer Service Assistance.
(See Forewordº.)
CAUTION
Batteries contain sulfuric acid which is poisonous
and corrosive. Wear protective safety glasses when
jump starting, and avoid spilling acid on your skin,
clothing, or vehicle.
If you should accidentally get acid on yourself or in
your eyes, remove any contaminated clothing and
flush the affected area with water immediately. Then
get immediate medical attention. If possible,
continue to apply water with a sponge or cloth while
en route to the medical office.
The gas normally produced by a battery will explode
if a flame or spark is brought near. Use only
standardized jumper cables and do not smoke or
light a match while jump starting.
NOTICE
The battery used for boosting must be 12 V. Do not jump
start unless you are sure that the booster battery is
correct.

IN CASE OF AN EMERGENCY
443
IF YOUR VEHICLE OVERHEATS
If your engine coolant temperature gauge indicates
overheating, if you experience a loss of power, or if you
hear a loud knocking or pinging noise, the engine has
probably overheated.
When the engine overheats
Pull safely off the road, stop the vehicle and turn on your
emergency flashers. Put the transmission in Pº and apply the
parking brake.
A: If steam is coming from your engine:
Turn off the engine. Leave the hood closed until there is no sign
of steam or coolant. Your engine could have been seriously
damaged already. Call your Lexus dealer for assistance.
CAUTION
To help avoid personal injury, keep the hood closed until
there is no steam. Escaping steam or coolant is sign of
very high pressure.
B: If no steam is coming from your engine:
Leave the engine running and turn off the air conditioning.
Check the following.
Is the cooling fan operating?
Is the coolant in the acceptable range?
Is the engine drive belt O.K.?
CAUTION
When the engine is running, keep hands and clothing
away from the moving fan and engine drive belt.
Do not attempt to remove the radiator cap when the
engine and radiator are hot. Serious injury could
result from scalding hot fluid and steam blown out
under pressure.
If the cooling fan is not operating or the coolant is not in the
acceptable range, turn off the engine and call your Lexus
dealer.
If both conditions are O.K., after the engine coolant
temperature has cooled to normal, continue driving your
vehicle.
If the engine coolant temperature does not cool down, or your
vehicle overheats again, have it checked as soon as possible
by your Lexus dealer.

IN CASE OF AN EMERGENCY
464
CAUTION
Use extreme caution when towing the vehicle. Avoid
sudden starts or erratic driving maneuvers which would
place excessive stress on the emergency towing eyelet
and towing cable or chain. The eyelet and towing cable
or chain may break and cause serious injury or damage.
NOTICE
Use only a cable or chain specifically intended for use
in towing vehicles. Securely fasten the cable or chain
to the towing eyelet provided.
Before towing, check that the center differential is unlocked.
(The indicator light must be off with the ignition on.) Release
the parking brake and put the transmission in Nº. The ignition
key must be in ACCº (engine off) or ONº (engine running).
CAUTION
If the engine is not running, the power assist for the
brakes and steering will not work so steering and
braking will be much harder than usual.
Emergency towing hook precautions:
Before emergency towing, check that the eyelet is not
broken or damaged and that the installation bolts are not
loose.
Fasten the towing cable or chain securely to the hook.
Do not jerk the eyelet. Apply steady and even force.
To avoid damaging the eyelet, do not pull from the side or at
a vertical angle. Always pull straight ahead.