2012 Lexus GS350 ABS

7086-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)
Right-hand drive vehicles
FuseAmpereCircuit
1RH J/B ALT80Right-hand junction block
2P/I ALT100RR DEF, TAIL, FR FOG, DEICER,
PANEL, RR S/SHADE
3ALT150
RH J/B ALT, P/I ALT, alternator, LH J/B
ALT, luggage compartment junction
block
4P/I-B NO.280F/PMP, EFI MAIN, A/F HTR, EDU, IG2
MAIN
5RH J/B-B40Right-hand junction block
6VGRS40No circuit
7LH J/B-B40Left-hand junction block
8PTC NO.250PTC heater
9PTC NO.150PTC heater
10LUG J/B ALT50Luggage compartment junction block
11ABS NO.140VDIM
12HTR50Air conditioning system
13ARS80No circuit
14EPS80EPS
15DOME7.5
Personal lights, ornament lights, trunk
light, footwell lights, door courtesy
lights, vanity lights, rear door inside han-
dle illuminations, power trunk lid

709 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350/250_EE (OM30C36E)
16MPX-B10
Smart entry & start system, electric tilt
and telescopic steering column, power
seats, head-up display, front right-hand
door ECU, gauges and meters, steering
sensor, yaw rate and G sensor, overhead
module, front left-hand door ECU,
power trunk lid, clock, body ECU, RR
CTRL SW, CAN gateway ECU
17FILTER10Condenser
18A/C COMP7.5Air conditioning system
19H-LP CLN30Headlight cleaner
20FAN NO.240Electric cooling fans
21LH J/B ALT60Left-hand junction block
22FAN NO.180Electric cooling fans
23P/I-B NO.150H-LP HI RH, H-LP HI LH, DRL, emer-
gency brake signal
24EPB30Parking brake
25LUG J/B-B40Luggage compartment junction block
26R/B-B20EPS-B, TV
27HORN10Horn
28ETCS10Multiport fuel injection system/sequen-
tial multiport fuel injection system
29ALT-S7.5Charging system
30ECU-B7.5Smart entry & start system
31DCM7.5DCM
32D/C CUT30DOME, MPX-B
33ABS NO.250VDIM
34ST30Starting system
35H-LP LO30Headlights, H-LP RLY
FuseAmpereCircuit

7246-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)
Front fog lights (if equipped)
To allow enough working
space, turn the steering
wheel to the opposite side
of the bulb to be replaced.
Remove the 2 fender liner
clips.
Turn the steering wheel to the
left when replacing the right
side light bulb, and turn the
steering wheel to the right when
replacing the left side light bulb.
To take out the clips, turn the
head of the clip to unlock, then
remove by pulling.
While holding the clamp
open, pull and remove the
tabs and open the fender
liner.
Unplug the connector while
pressing the lock release.
Replacing light bulbs
1
2
3

725 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350/250_EE (OM30C36E)Turn the bulb base counter-
clockwise.
Set the new light bulb.
Align the 3 tabs on the light
bulb with the mounting, and
insert. Turn it clockwise to set.
Set the connector.
After installing the connector,
shake the bulb base gently to
check that it is not loose, turn
the fog lights on once and visu-
ally confirm that no light is
leaking through the mounting.
Reinstall the fender liner
and install the clips.
Insert the clips and turn to lock.
4
5
6
7

731 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350/250_EE (OM30C36E)
Outer foot lights
Press the upper part of the
outside rear view mirror to
tilt the mirror face upward,
and apply protective tape to
the lower part of the mirror
cover.
Insert 2 flathead screw-
drivers wrapped in protec-
tive tape, and disconnect the
tabs behind the mirror.
Prize the mirror out toward you,
disconnecting the tabs 2 at a
time.
Work carefully, ensuring that
you do not drop the mirror.
Disconnect the connectors
behind the mirror, and
remove the mirror.
When removing the thin con-
nectors, make sure to mark one
of the connectors with a piece of
tape, to avoid mixing them up
when reinstalling.
Work carefully, ensuring that
you do not drop the mirror.
When handling the mirror, do
not touch the parts applied with
grease.
The number of connectors
equipped differs by vehicle
specification.
1
2
3

733 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350/250_EE (OM30C36E)Install the visor cover on the
mirror frame, secure it with
a screw, and install the side
turn signal light and outer
foot light.
Use only the screw position
shown in the illustration.
Side turn signal light: Align the
tabs on the light and the cover
and install.
Outer foot light: Interlock the
tabs in the groove of the light
body with those on the cover,
and secure.
Disconnect the tabs, and
separate the top and bottom
of the rear side cover of the
mirror.
8
9

7346-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)Install the cover of the back
end of the mirror, installing
the lower side and the upper
side in that order.
When installing the lower side
of the cover, insert the side turn
signal light pin into the hole in
the cover.
Secure the cover with
screws and reconnect the
connectors back together.
Secure the cords by returning
them to the hooks as they were.
Align the tabs, and secure
the mirror by pushing in
each diagonally-opposite
pair of tabs in order.
Make sure to insert the tabs in
order as shown in the illustra-
tion, and push them in until a
click is heard.
If you do not hear the click, do
not force the tabs in. Instead,
remove the mirror and check
that the tabs are aligned.
10
11
12

7507-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)The following warning indicates the possibility of damage to the
vehicle that may lead to an accident. Immediately stop the vehicle
in a safe place and contact any authorized Lexus dealer or repairer,
or another duly qualified and equipped professional.
Failure to investigate the cause of the following warnings may lead
to the system operating abnormally and possibly cause an accident.
Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional imme-
diately.
Stop the vehicle immediately.
Wa r n i n g
lightWarning light/Details
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
Wa r n i n g
lightWarning light/Details
Malfunction indicator lamp
Indicates a malfunction in:
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic automatic transmission control system
SRS warning light
Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner system
ABS warning light
Indicates a malfunction in:
• The ABS; or
• The brake assist system