light Lexus GS300 2006 Electrical Components

SECTION 6 – 4
563
SERVICE PROCEDURES AND
SPECIFICATIONS
Electrical components
Specifications564 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking battery condition571 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery recharging precautions574 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking and replacing the blade type fuses574 . . . . . . . . . . . . . . . .
Checking the cartridge type fuses577 . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding washer fluid579 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the headlight aim579 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing light bulbs584 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTRICAL COMPONENTS
566
No.FUSEAMPERECIRCUIT
1 STR LOCK25Steering lock system
2 SECURITY7.5Smart access system with
push−button start
3 TI &TE20Power tilt and telescopic
steering wheel, Multiplex
communication system
4 AM17.5Starting system
5 STOP SW7.5
Stop/tail lights, Multi−port fuel
injection system/sequential
multiport fuel injection system,
Starting system, Electronic
control brake system, Vehicle
stability control system, Shift
lock system
6 OBD7.5On−board diagnosis system
7 FR P/SEAT
RH30Power seat system
8 AIR SUS20Electronic modulated
suspension
9 PWR
OUTLET15Power outlet
10 CIG15Cigarette lighter
11 ACC7.5
Multiplex communication
system, Smart access system
with push−button start, Rear
view monitor system, Audio
system, Air conditioning system
No.FUSEAMPERECIRCUIT
12 IGN10
Multi−port fuel injection
system/sequential multiport fuel
injection system, SRS airbag
system, Stop/tail lights,
Steering lock system, Electronic
control brake system
13 GAUGE7.5Gauges and meters
14 ECU−IG
RH10
Power tilt and telescopic
steering wheel, Multiplex
communication system, Smart
access system with
push−button start, Audio
system, Air conditioning
system, Shift lock system, Tire
pressure warning system,
Combination switch
15 FR S/HTR
RH15Seat heater, Heated and
ventilated seats
16 RH−IG7.5
Seat heater switches, Front
right door control system, Rear
right door control system,
Capacitor, Combination switch,
Seat belt pretensioners,
Intuitive parking assist
17 AM215Starting system

ELECTRICAL COMPONENTS
567
No.FUSEAMPERECIRCUIT
18 FR DOOR
RH20
Front right door control system
(Power door lock system,
Power rear view mirror control
system, Door courtesy light,
Outside rear view mirror heater,
Power window), Multiplex
communication system
19 RR DOOR
RH20Rear right door control system
(Power door lock system, Door
courtesy light, Power window)
20 RR DOOR
LH20Rear left door control system
(Power door lock system, Door
courtesy light, Power window)
21 FR DOOR
LH20
Front left door control system
(Power door lock system,
Power rear view mirror control
system, Door courtesy light,
Outside rear view mirror heater,
Power window)
22 RAD NO.310Audio system
23 H−LP LVL7.5Adaptive front lighting system
(AFS), Automatic headlight
leveling control system
No.FUSEAMPERECIRCUIT
24 LH−IG10
Charging system, Headlight
cleaners, Exhaust gas sensor,
Rear window defogger, Electric
cooling fans, Rear left door
control system, Front left door
control system, Emergency
flashers, Automatic
transmission, Seat belt
pretensioners, Intuitive parking
assist
25 FR WIP30Windshield wipers and washer
26 PANEL7.5
Steering switch illumination,
Audio system, Glove box light,
Automatic transmission selector
lever illumination, Console box
light, Adaptive variable
suspension switch illumination,
Cigarette lighter illumination, Air
conditioning system, Traction
control off switch illumination,
Driving pattern selector switch,
Seat heater or Heated and
ventilated seat switches,
Register ILL RH, Register ILL
LH, Register ILL CTR
27 FUEL
OPEN10Fuel filler door opener, Trunk lid
opener

ELECTRICAL COMPONENTS
568
No.FUSEAMPERECIRCUIT
28 ECU−IG LH10
Vehicle stability control system,
Electronic control brake system,
Yaw rate and G sensor,
Steering sensor, Cruise control
system, Dynamic radar cruise
control system, Electronic
power steering system, Variable
gear ratio steering system,
Rear view monitor system,
Four−wheel drive system, Front
controller, Moon roof, Rain
sensor
29 FR S/HTR
LH15Seat heater, Heated and
ventilated seats
30 FR P/SEAT
LH30Power seat system
31 A/C7.5Air conditioning system
32 TV7.5Audio system, Air conditioning
system, Rear view monitor
system
33 TRK OPN10Trunk lid opener
34 LH−B10Theft deterrent system
35 S/ROOF25Moon roof
36 ECU−B10
Variable gear ratio steering
system, Electronic power
steering system, Driver’s seat
switch module
37 ABS
MAIN310Electronic control brake system
No.FUSEAMPERECIRCUIT
38 TURN−HAZ15Turn signal lights, Emergency
flashers
39 IG2 MAIN20“IG2”, “GAUGE” and “IGN”
40 RAD NO.230Audio system
41 D/C CUT20“DOME “ and “MPX−B”
42 RAD NO.130Audio system
43 MPX−B10
Multiplex communication
system, Front controller, Door
control system (Power door
lock system, Door courtesy
lights, Power windows, Power
rear view mirror control system,
Outside rear view mirror
heaters), Power seat system,
Steering sensors, Electronic
control brake system, Power tilt
and telescopic steering system,
Gauges and meters,
Combination switch
44 DOME10
Foot lights, Vanity lights,
Gauges and meters, Steering
spot light, Steering switch
illumination, Rear personal
lights, Automatic transmission
selector lever spot light, Front
personal lights
45 ABS
MAIN210Electronic control brake system
46 ABS
MOTOR30Anti−lock brake system

ELECTRICAL COMPONENTS
570
No.FUSEAMPERECIRCUIT
70 A/F15Multi−port fuel injection
system/sequential multiport fuel
injection system
71 ETCS10Multi−port fuel injection
system/sequential multiport fuel
injection system
72 ALT−S7.5Charging system
73 EM VLV10No circuit
74 H−LP CLN30Headlight cleaner system
75 A/C COMP7.5Air conditioning system
76 DEICER25No circuit
77 FR
CTRL−AM30“FR TAIL”, “FR FOG” and
“WASHER”
78 IG210Starting system
79 EFI NO.210
Multi−port fuel injection
system/sequential multiport fuel
injection system, Evaporative
system
80 H−LP R
LW R15Right−hand headlight (low
beam)
81 H−LP L
LW R15Left−hand headlight (low beam)
82 F/PMP25Fuel pump
No.FUSEAMPERECIRCUIT
83 EFI
GS430:
25
GS300:
25Multi−port fuel injection
system/sequential multiport fuel
injection system
84 INJ20Multi−port fuel injection
system/sequential multiport fuel
injection system
85 H−LP UPR15Headlights (high beam)
86 HORN10Horn
87 WASHER20Windshield wipers and washer
88 FR TAIL10Parking lights, Side marker
lights
89 FR FOG15Front fog lights
90 RR
S/SHADE7.5Rear electric sunshade
91 PSB30Pre−collision system
92 RR−IG210No circuit
93 RR−IG110Pre−collision system, Rear
electric sunshade, Seat belt
pretensioners
94 RR−B10Luggage compartment light,
Noise filter
95 RR FOG7.5Rear fog lights
96 STOP LP L10Stoplights, Back up lights

ELECTRICAL COMPONENTS
571
No.FUSEAMPERECIRCUIT
97 STOP LP R10High mounted stoplights
98 RR TAIL10License plate lights, Tail lights,
Rear side marker lights
CHECKING BATTERY CONDITION
Precautions
CAUTION
BATTERY PRECAUTIONS
The battery produces flammable and explosive
hydrogen gas.
Do not cause a spark by contacting the battery
terminals with tools.
Do not smoke or light a match near the battery.
The electrolyte contains poisonous and corrosive
sulfuric acid.
Avoid contact with eyes, skin or clothes.
Never inhale or swallow electrolyte.
Wear protective safety glasses when working near
the battery.
Keep children away from the battery.
EMERGENCY MEASURES
If electrolyte gets in your eyes, flush your eyes with
clean water for at least 15 minutes and get immediate
medical attention. If possible, continue to apply
water with a sponge or cloth while traveling to the
medical office.

ELECTRICAL COMPONENTS
578
64g104

Good
Blown
If the headlights or other electrical components do not
work and the blade type fuses are O.K., check the
cartridge type fuses. If any of the cartridge type fuses are
blown, they must be replaced.
If there is an overload in the circuits from the battery, the fuses
are designed to blow before the entire wiring harness is
damaged.
CAUTION
Always use a genuine Lexus fuse or equivalent for
replacement. Never install an ordinary wire − even for
a temporary fix. This may cause extensive damage and
possibly a fire.
NOTICE
Before replacing the fuses, have the cause of electrical
overload determined and repaired by your Lexus dealer.

ELECTRICAL COMPONENTS
579
ADDING WASHER FLUID
If the washer tank becomes nearly empty, add washer
fluid.
You may use plain water as washer fluid. However, in cold
areas where temperatures range below the freezing point, use
washer fluid containing antifreeze. This product is available at
your Lexus dealer and most auto parts stores. Follow the
manufacturer’s directions for how much to mix with water.
NOTICE
Do not use engine antifreeze or any other substitute
because it may damage your vehicle’s paint.
CHECKING THE HEADLIGHT AIM
G64020

1
Beam angle gauge
(horizontal movement for high beam)
2
Beam angle gauge
(vertical movement for high beam)
3
Beam angle gauge
(vertical movement for low beam)
4
Beam angle gauge
(horizontal movement for low beam)
Before checking the headlight aim:
1. Be sure that the body around the headlight is not deformed.
2. Park the vehicle on a level spot.
3. The driver gets into the driver’s seat and puts the vehicle in
a state readying for a driving (with a full tank).
4. Bounce the vehicle several times.

ELECTRICAL COMPONENTS
580
Adjusting the headlight aiming (low beam)
G64021

1
Adjusting bolt A
2
Adjusting bolt B
G64022

1
Bubble 2
Acceptable range
Vertical movement gauge: The bubble of the gauge should
not deviate from the center of the gauge by more than 2 marks
to either side of the gauge.
If the bubble is out of the acceptable range of the beam angle
gauge, adjust it using bolt A and B.

ELECTRICAL COMPONENTS
581
G64023
1. Turn the bolt A in either direction using a Phillips−head
screwdriver. At this time, keep the turning direction and
number of turns in mind.
G64024
2. Turn the bolt B the same number of turns and in the same
direction as step 1 using a Phillips−head screwdriver.
If you do not know or cannot find the original position, or if you
feel that there is a large deviation, take the vehicle to your
Lexus dealer to adjust the headlight aim.
After adjusting the headlight in the vertical direction, check that
the light has been shifted from the adjusted position in the
horizontal direction.