2015 Lexus GS350 warning lights

240
GS350_OM_OM30E15U_(U)
4-5. Using the driving support systems
■If there are lane markers on only one side of the vehicle
The lane keeping assist function will not operate. Also, the lane departure warning
will not operate for the side on which lane markers could not be recognized.
■Conditions in which the function may not operate correctly
In the following conditions, the LKA system functions may not operate, or it may not
be possible to ensure adequate performance. Also, the camera sensor may be
unable to recognize lane lines causing the lane departure warning function to oper-
ate incorrectly, or the lane keeping assist function may not operate properly. How-
ever, this does not indicate a malfunction.
●When driving through an area with no lane markers, such as a tollbooth, a crossing
or before a ticket checkpoint
●When driving on a sharp curve
●When lanes are extremely narrow or extremely wide
●When the vehicle leans to one side an unusual amount due to a heavy load or
improper tire inflation pressure
●When the following distance between your vehicle and the vehicle ahead is
extremely short
●When the lane markers are yellow (These may be more difficult for the system to
recognize compared to white markers.)
●When the lane markers are broken, “Botts’ dots”, “Raised pavement marker” or
stones
●When lane markers are obscured or pa rtially obscured by sand, dirt, etc.
●When there are shadows on the road running parallel with lane markers, or if a
shadow covers the lane markers
●When driving on a particularly bright road surface, such as concrete
●When driving on a road surface that is bright due to reflected light
●When driving in a location where the light level changes rapidly, such as the
entrance to or exit from a tunnel
●When sunlight or the headlights of oncoming vehicles are shining directly into the
camera lens
●When driving on roads that are branching or merging
●When driving on a road surface that is wet due to rain, previous rainfall, standing
water, etc.
●When the vehicle experiences strong up-a nd-down motion such as when driving
on an extremely rough road or on a seam in the pavement
●When headlight brightness at nighttime is reduced due to dirt on the lenses, or
when the headlights are misaligned
●When driving with a strong crosswind

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GS350_OM_OM30E15U_(U)
6-3. Do-it-yourself maintenance
■Trunk
FuseAmpereCircuit
1PSB30Pre-collision seat belts
2PTL25Power trunk opener and closer
3RR J/B-B10Smart access system with push-button start
4RR S/HTR20Seat heaters (rear)
5FR S/HTR10Seat heaters/ventilators (front)
6RR FOG10No circuit
7DC/DC-S (HV)7. 5No circuit
8BATT FAN (HV)20No circuit
9SECURITY7. 5SECURITY
10ECU-B NO.37. 5Parking brake
11TRK OPN7. 5Power trunk opener and closer
12DCM (HV)7. 5No circuit
13AC INV (HV )20No circuit
14RR-IG15Radar sensor, Blind Spot Monitor
15RR ECU-IG10
Power trunk opener and closer, parking
brake, tension reducer (rear left-hand), RR
CTRL SW, tire pressure warning system
16EPS-IG5Electric power steering system
17BACK UP7. 5Back-up lights, Remote Touch screen

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GS350_OM_OM30E15U_(U)
7-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds
The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
Calmly perform the following actions if any of the warning lights comes
on or flashes. If a light comes on or flashes, but then goes off, this does
not necessarily indicate a malfunction in the system. However, if this
continues to occur, have the vehicle inspected by your Lexus dealer.
Stop the vehicle immediately. Cont inuing to drive the vehicle may
be dangerous.
Warning lightWarning light/Details
(U.S.A.)
(Canada)Brake system warning light (warning buzzer) •Low brake fluid
• Malfunction in the brake booster system

4777-2. Steps to take in an emergency
GS350_OM_OM30E15U_(U)
7
When trouble arises
CAUTION
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact your Lexus dealer. The
vehicle will become extremely unstable during braking, and the ABS system may
fail, which could cause an accident resulting in death or serious injury.
■When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold firmly and
operate using more force than usual.
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pres-
sure immediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change
it with the spare tire and have the flat tire repaired by the nearest Lexus dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could
lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

4927-2. Steps to take in an emergency
GS350_OM_OM30E15U_(U)
(If equipped)
Indicates that the LKA
(Lane-Keeping Assist)
system detects no-
handed driving (while the
lane keeping assist func-
tion is operating)The warning buzzer
sounds twice.
Grip the steering wheel
firmly.
(If equipped)
Indicates that the Blind
Spot Monitor sensors or
the surrounding area on
the bumper is dirty or
covered with ice
Clean the sensor and its
surrounding area on the
bumper.
Indicates that remaining
fuel is approximately 2.6
gal. (10.0 L, 2.2 Imp.gal.)
or less
Refuel the vehicle.
Indicates that the engine
switch is turned off or
turned to ACCESSORY
mode and the driver’s
door is opened while the
lights are turned on
Tu r n t h e l i g h t s o f f .
Indicates that the driver’s
door was opened with the
shift position in any posi-
tion other than P
Shift the shift position to P.
Wa r n i n g m e s s a g eDetailsCorrection procedure
(Flashes)
(Flashes)

597Alphabetical index
GS350_OM_OM30E15U_(U)
Armrest door ......................................... 357
Ashtrays.................................................... 344
Assist grip ................................................ 359
Audio input
*
Audio system*
Automatic headlight leveling system ......................................................199
Automatic light control system ......................................................196
Automatic transmission ...................... 184 If the shift lever cannot be shifted from P ............. 519
M mode ................................................... 187
Paddle shift switches ......................... 186
AUX port
*
Auxiliary boxes ...................................... 338
AVS (Adaptive Variable Suspension system).......................... 250 Back-up lights
Replacing light bulbs ....................... 454
Wattage .................................................545
Battery ...................................................... 406 Battery checking ................................406
If the vehicle battery is discharged .................................... 525
Preparing and checking before winter.................................................... 284
Warning light ......................................... 471
Blind Spot Monitor (BSM) ............... 268
Bluetooth
®*
Brake Fluid .......................................................... 542
Parking brake ........................................ 192
Warning light ........................... 470, 472
Warning message............................ 480
Brake assist ..............................................249
Break-in tips ............................................. 162
Brightness control Instrument panel light control ........ 82
BSM (Blind Spot Monitor) ............... 268 Blind Spot Monitor function..........272
Rear Cross Traffic Alert function................................................ 275
B
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

599Alphabetical index
GS350_OM_OM30E15U_(U)
Daytime running light system ............199
DefoggerFront windshield .................................... 311
Outside rear view mirrors .............326
Rear window ........................................326
Differential Front differential ..................................542
Rear differential ...................................542
Dimension ............................................... 536
Dinghy towing.......................................... 176
Display 12.3-inch display................................. 297
Dynamic radar cruise control....... 219
Lexus night view ................................. 279
LKA (Lane-Keeping Assist) ........ 238
Multi-information display ..................84
Trip information .................................... 85
Warning message ............................ 480
Do-it-yourself maintenance ...............391
Door courtesy lights Location ..................................................329
Wattage ................................................. 545
Doors...........................................................123 Automatic door locking and unlocking system.................... 125
Door glasses ........................................... 151
Door lock .................................................123
Open door warning buzzer.............. 111
Open door warning light............... 473
Outside rear view mirrors .............. 148
Rear door child-protector...............124 Driver’s seat position memory.......... 136
Driving position memory................. 137
Memory recall function ....................139
Power easy access system .............136
Driving ........................................................ 160 Break-in tips ........................................... 162
Correct driving posture .................... 28
Driving mode select switch .......... 244
Procedures ............................................ 160
Winter drive tips ................................ 284
DRS (Dynamic Rear Steering) ....... 250 Function ..................................................250
Warning message.............................486
DVD player
*
Dynamic radar cruise control ........... 219 Function .................................................... 219
Warning message................ 483, 490
Dynamic Rear Steering (DRS) ....... 250 Function ..................................................250
Warning message.............................486
Eco drive mode......................................244
Eco Driving Indicator .................... 90, 94
EDR (Event data recorder)................... 10
Electric Power Steering (EPS) ....... 250 Function ..................................................250
Warning light ......................................... 471
Warning message.............................485
Electronic key .......................................... 104 Battery-saving function ......................113
If the electronic key does not operate properly ............................ 522
Replacing the battery .......................427
D
E
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

601Alphabetical index
GS350_OM_OM30E15U_(U)
First-aid kit storage net ...................... 339
Flat tire ...................................................... 504
Floor mats ................................................... 26
FluidAutomatic transmission ................... 541
Brake ........................................................542
Washer .................................................. 409
Fog lights ................................................... 201 Replacing light bulbs ............447, 455
Switch........................................................ 201
Wattage ................................................. 545
Footwell light .......................................... 329
Front passenger occupant classification system .............................47
Front personal lights............................ 330
Front seats .................................................134 Adjustment ............................................. 134
Cleaning ................................................ 380
Correct driving posture .................... 28
Driving position memory ................ 136
Head restraints ......................................142
Power easy access system ............ 136
Seat heaters ..........................................349
Seat position memory....................... 136
Seat ventilators ....................................349
Front side marker lights .......................196 Light switch ............................................ 196
Replacing light bulbs ....................... 455
Welcome light illumination control ................................................... 107 Front turn signal lights ..........................190
Replacing light bulbs ....................... 449
Turn signal lever .................................. 190
Wattage .................................................545
Fuel............................................................... 210 Capacity.................................................538
Fuel gauge .................................................81
Fuel pump shut off system ............ 469
Information............................................ 546
Refueling ..................................................210
Type............................................... 210, 538
Warning light ....................................... 473
Warning messages .......................... 492
Fuel filler door.......................................... 210 Refueling ..................................................210
When the fuel filler door cannot be opened ........................... 213
Fuel pump shut off system .................469
Fuses...........................................................429
Garage door opener............................ 361
Gauges.......................................................... 81
Glove box ............................................... 334
Glove box light...................................... 334
F
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