2006 LEXUS RX330 ABS

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.

DRIVING TIPS
486
Because of the added load of the trailer, your vehicle’s
engine may overheat on hot days (at temperatures over
30C [85 F]) when going up a long or steep grade with a
trailer. If the engine coolant temperature gauge indicates
overheating, immediately turn off the air conditioning (if in
use), pull your vehicle off the road and stop in a safe spot.
See “If your vehicle overheats” on page 499 of this manual.
 Always place wheel blocks under both the vehicle and trailer
wheels when parking. Apply the parking brake firmly. Put
the transmission in “P”. Avoid parking on a slope with a
trailer, but if it cannot be avoided, do so only after performing
the following:
1. Apply the brakes and keep them applied.
2. Have someone place wheel blocks under both the vehicle
and trailer wheels.
3. When the wheel blocks are in place, release your brakes
slowly until the blocks absorb the load.
4. Apply the parking brake firmly.
5. Shift into “P” and turn off the engine. When restarting out after parking on a slope:
1. With the transmission in “P” position, start the engine. Be
sure to keep the brake pedal depressed.
2. Shift into the following position.
With automatic transmission (standard type) —
Shift into the “3”, “2”, “L” or “R” position.
With automatic transmission (multi
−mode type) —
Shift into the “3” (third range), “2” (second range), “\
1” (first
range) or “R” position.
3. Release the parking brake and brake pedal and slowly pull
or back away from the wheel blocks. Stop and apply your
brakes.
4. Have someone retrieve the blocks.

CHASSIS
568
CHECKING BRAKE FLUID
To check the fluid level, simply look at the seethrough
reservoir. The level should be between the “MAX” and
“MIN” lines on the tank.
It is normal for the brake fluid level to go down slightly as the
brake pads wear. So be sure to keep the reservoir filled.
If the reservoir needs frequent refilling, it may indicate a serious
mechanical problem.
If the level is low, add FMVSS No.116 DOT 3 or SAE J1703
brake fluid to the brake reservoir.
Remove and replace the reservoir cap by hand. Add brake
fluid up to the “MAX” line.
Use only newly opened brake fluid. Once opened, brake fluid
absorbs moisture from the air, and excess moisture can cause
a dangerous loss of braking efficiency.
CAUTION
Take care when filling the reservoir because brake fluid
can harm your hands or eyes. If fluid gets on your hands
or in your eyes, flush the affected area with clean water
immediately. If you still feel uncomfortable with your
hands or eyes, go to the doctor.
NOTICE
If you spill some of the fluid, be sure to wipe it off to
prevent it from damaging the parts or paintwork.

ELECTRICAL COMPONENTS
596
No.FUSEAMPERECIRCUIT
1 AIRSUS60Electronically modulated air
suspension
2 INPJ/B100
All components in “HEATER”,
“H−LP CLN”, “TAIL”, “PANEL”,
“FR FOG”, “CIG”, “RADIO NO.
2”, “ECU− ACC”, “PWR OUTLET
NO. 1”, “GAUGE NO. 1”,
“ECU− IG NO. 1”,“ FR WIP”, “RR
WIP”, “WASHER”, “SEAT HTR”,
“ECU− IG NO. 2”, “P/SEAT”,
“PWR”, “TI&TE”, “RR DOOR
LH”, “RR DOOR RH”, “MPX− B”,
“AM1”, “DOOR NO. 2”, “STOP”,
“OBD”, “FUEL OPN”, “AIRSUS”
(7.5 A), “S/ROOF”, “FR DEF”
and “RR FOG” fuses
No.FUSEAMPERECIRCUIT
3 ALT140
All components in “INP −J/B”,
“AIRSUS” (60 A), “ABS NO. 1”,
“ABS NO. 2”, “RDI FAN”, “RR
DEF”, “HEATER”, “PBD”, “H −LP
CLN/MSB”, “H− LP CLN”, “PWR
OUTLET NO. 2”, “TOWING”,
“TAIL”, “PANEL”, “FR FOG”,
“CIG”, “RADIO NO. 2”,
“ECU− ACC”, “PWR OUTLET
NO. 1”, “GAUGE NO. 1”,
“ECU− IG NO. 1”, “FR WIP”, “RR
WIP”, “WASHER”, “HEATER”,
“SEAT HTR”, “ECU −IG NO. 2”,
“P/SEAT”, “PWR”, “TI&TE”, “RR
DOOR LH”, “RR DOOR RH”,
“MPX− B”, “AM1”, “DOOR NO.
2”, “STOP”, “OBD”, “FUEL
OPN”, “AIRSUS” (7.5 A),
“S/ROOF”, “FR DEF” and “RR
FOG” fuses
4 PBD30Power back door
5 HLP
CLN/MSB30Headlight cleaner
6 HLP CLN30Headlight cleaner

ELECTRICAL COMPONENTS
597
No.FUSEAMPERECIRCUIT
7 ABS NO. 130
Anti−lock brake system, vehicle
stability control system, traction
control system, brake assist
system
8 RR DEF40Rear window defogger
9 HEATER50Air conditioning system, rear
window defogger
10 DRL7.5Daytime running light system
11 HLP L
LW R15Left− hand headlight (low beam)
12 HLP L
UPR15Left− hand headlight (high beam)
13 HLP R
UPR15Right− hand headlight (high
beam)
14 PWR
OUTLET
NO. 220Power outlet
15 TOWING30Trailer lights
16 ABS NO. 250
Anti− lock brake system, vehicle
stability control system, traction
control system, brake assist
system
No.FUSEAMPERECIRCUIT
17 RDI FAN50Electric cooling fan
18 HAZ15Turn signal lights
19 CRT7.5Audio system
20 ALTS7.5Charging system
21 ETCS10Multiport fuel injection
system/sequential multiport fuel
injection system
22 HORN10Horns
23 MAIN40
Daytime running light system,
left− hand headlight, right− hand
headlight, all components in
“H− LP R LWR”, “H −LP R UPR”,
“H− LP L UPR”, “H− LP L LWR”
and “DRL” fuses
24 AM230Starting system, all components
in “GAUGE NO. 2”, “IGN” and
“INJ” fuses
25 RADIO
NO. 115Audio system, navigation system