Page 563 of 601

CHASSIS
542
Chain installation
Install the chains on the rear tires as tightly as possible.
Do not use tire chains on the front tires. Retighten chains
after driving 0.5 — 1.0 km (1/4 — 1/2 mile).
When installing chains on your tires, carefully follow the
instructions of the chain manufacturer.
CAUTION
Do not exceed 50 km/h (30 mph) or the chain
manufacturer’s recommended speed limit,
whichever is lower.
Drive carefully avoiding bumps, holes, and sharp
turns, which may cause the vehicle to bounce.
Avoid sharp turns or locked wheel braking, as use of
chains may adversely affect vehicle handling.
When driving with chains installed, be sure to drive
carefully. Slow down before entering curves to avoid
losing control of the vehicle. Otherwise an accident
may occur.
NOTICE
When jacking up or installing tire chains, be sure to turn
off the rear height control air suspension with the
“HEIGHT CONTROL OFF” switch and stop the engine.
Otherwise, the vehicle height may change because of
the automatic leveling function resulting in accident.
Page 565 of 601
CHASSIS
544
ALUMINUM WHEEL PRECAUTIONS
When installing aluminum wheels, check that the wheel nuts
are tight after driving your vehicle the first 1600 km (1000
miles).
If you have rotated, repaired, or changed your tires, check
that the wheel nuts are still tight after driving 1600 km (1000
miles).
When using tire chains, be careful not to damage the
aluminum wheels.
Use only Lexus wheel nuts and wrench designed for your
aluminum wheels.
When balancing your wheels, use only Lexus balance
weights or equivalent and a plastic or rubber hammer.
As with any wheel, periodically check your aluminum
wheels for damage. If damaged, replace immediately.
SUSPENSION AND CHASSIS
CAUTION
Do not modify the suspension/chassis with lift kits,
spacers, springs, etc. It can cause dangerous handling
characteristics, resulting in loss of control.
Page 568 of 601
ELECTRICAL COMPONENTS
547
Driver’s side instrument panel
No.FUSEAMPERECIRCUIT
1SPARE10Spare fuse
2ALT140
Charging system and all
components in “AM1”,
“HEATER”, “CDS FAN”, “FR
FOG”, “DEFOG”, “AIR SUS”,
“AC INV”, “SEAT HEATER”,
“OBD”, “STOP”, “J/B”, “RR AC”,
“MIR HEATER”, “BATT CHG”,
“TOWING BRK” and “TOWING”
fuses
3SPARE15Spare fuse
4HEATER50Air conditioning system
5AIR
SUS50Rear height control air
suspension
6AM150
All components in “ACC”, “CIG”,
“IG1”, “FR WIP −WSH”, “RR
WIP”, “RR WSH”, “DIFF”,
“ECU− IG”, “TEMS” and “STA”
fuses
7TOWING
BRK30Trailer brake controller
8J/B50
All components in “P FR P/W”,
“P RR P/W”, “D RR P/W”, “D
P/SEAT”, “P P/SEAT”, “TAIL”,
“PANEL” and “POWER OR
TI&TE” fuses
9BATTCHG30Trailer sub battery
10TOWING40Trailer lights
Page 569 of 601

ELECTRICAL COMPONENTS
548
No.FUSEAMPERECIRCUIT
11CDS FAN20Electric cooling fan
12RR A/C30Rear air conditioning system
13MIR
HEATER10Outside rear view mirror
defogger
14STOP10
Stop lights, high m ounted
stoplight, shift lock control
system, vehicle stability control
system, electronic m odulated
suspension, rear height control
air suspension, multiport fuel
injection system/sequential
multiport fuel injection system
15AC INV15Power outlet (115 VAC)
16FR FOG15Front fog lights
17OBD7.5On −board diagnosis system
18HEAD
(LO RH)10Right− hand headlight (low beam)
19HEAD
(LO LH)10Left− hand headlight (low beam)
No.FUSEAMPERECIRCUIT
20HEAD
(HI RH)10Right− hand headlight (high
beam)
21HEAD
(HI LH)10Left− hand headlight (high beam)
22EFI NO.210Multiport fuel injection
system/sequential multiport fuel
injection system
23HEATER
NO.27.5Air conditioning system
24DEFOG30Rear window defogger
25AIRSUSNO.210Rear height control air
suspension
26SEAT
HEATER20Seat heaters
27DOME10
Ignition switch light, interior
lights, personal lights, foot
lights, running board lights,
door courtesy lights, inside
door handle lights,
multi −information display
28RADIO
NO.120Audio system, navigation
system
Page 570 of 601