lights Lexus IS250C 2014 Repair Manual

524
5-2. Steps to take in an emergency
IS250C/350C_U
If the engine will not start
If the engine will not start even though correct starting procedures are
being followed (
→P. 147), consider each of the following points.
■The engine will not start even when the starter motor operates
normally.
One of the following may be the cause of the problem.
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● The engine may be flooded.
Try to restart the engine once more following correct starting
procedures. ( →P. 147)
● There may be a malfunction in the engine immobilizer system.
(→ P. 9 8 )
■ The starter motor turns over slowly, the interior lights and head-
lights are dim, or the horn does not sound or sounds at a low vol-
ume.
One of the following may be the cause of the problem.
● The battery may be discharged. ( →P. 5 3 2 )
● The battery terminal connections may be loose or corroded.

5
When trouble arises
525
5-2. Steps to take in an emergency
IS250C/350C_U
■The starter motor does not turn ov er, the interior lights and head-
lights do not turn on, or the horn does not sound.
One of the following may be the cause of the problem.
● One or both of the battery terminals may be disconnected.
● The battery may be discharged. ( →P. 5 3 2 )
● There may be a malfunction in the steering lock system.
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.

5
When trouble arises
533
5-2. Steps to take in an emergency
IS250C/350C_U
■Avoiding a discharged battery
●Turn off the headlights and the audio system while the engine is off.
●Turn off any unnecessary electrical components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic, etc.
■Charging the battery
The electricity stored in the battery will discharge gradually even when the vehi-
cle is not in use, due to natural discharge and the draining effects of certain
electrical appliances. If the vehicle is left for a long time, the battery may dis-
charge, and the engine may be unable to start. (The battery recharges automat-
ically during driving.)
■When the battery is removed or discharged
Make sure that the key is not inside the vehicle when recharging or replacing the
battery. The key may be locked in the vehicle if the alarm is activated. (→P. 1 0 1 )
Maintain the engine speed of the second vehicle and turn the
“ENGINE START STOP” switch to IGNITION ON mode,
then start the vehicle’s engine.
Once the vehicle’s engine has started, remove the jumper
cables in the exact reverse order in which they were con-
nected.
Once the engine starts, have the vehicle checked at your Lexus dealer
as soon as possible.STEP5
STEP6

560
6-1. Specifications
IS250C/350C_U
Ignition system
Electrical system
Spark plug
Make
GapDENSO FK20HBR11
0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust gap when tuning engine.
Battery
Open voltage* at
68 °F (20 °C):12.6  12.8 V Fully charged
12.2 
12.4 V Half charged
11.8 
12.0 V Discharged
(*: Voltage checked 20 minutes after
the engine and all the lights are turned
off)
Charging rates5 A max.

568
6-1. Specifications
IS250C/350C_U
Light bulbs
A: D4S discharge bulbs
B: H11 halogen bulbs
C: Wedge base bulbs (amber)
D: HB3 halogen bulbs
E: Wedge base bulbs (clear)
F: Double end bulbs
Light BulbsBulb No.WTy p e
Exterior
Headlights
High beam
Low/high beam (discharge bulbs)
Low beam (halogen bulbs)
9005D4S
H116035
55D
A B
Front turn signal lightsWY21W21C
Parking lights (vehicles with
halogen headlights)W5W5E
Front fog lightsH1155B
Rear turn signal lightsWY21W21C
Back-up lights92116E
Outer foot lights5E
Interior
Vanity lights1.5F
Tr u n k l i g h t5F
Interior light5E
Door courtesy lights5E

588
6-2. Customization
IS250C/350C_U
Steering
wheel
(
→P. 76 )
Auto tilt-away functionOnOff
Power win-
dows
(
→P. 8 2 )
Wireless remote control
linked operationOffOn
Retractable
hardtop
(
→P. 9 0 )
Retractable hardtop
operation control linked
to the intuitive parking
assist
OnOff
Automatic
light control
system
(
→P. 1 76 )
Light sensor sensitivityLevel 3Level 1 to 5
Ti m e e l a p s e d b e f o r e
headlights automatically
turn off after doors are
closed
30 seconds
0 seconds
60 seconds
90 seconds
Lights
(
→P. 1 7 8 )
Daytime running light sys-
tem (U.S.A. only)OnOff
Windshield
wipers and
washer
(
→P. 1 8 2 )
Switching operation when
the vehicle is stationaryOnOff
Drip prevention functionOnOff
Ti m e e l a p s e d b e f o r e t h e
drip prevention function
operatesVa r i a b l e
depending on
the vehicle
speed
3 seconds
ItemFunctionDefault settingCustomizedsetting

589
6-2. Customization
6
Vehicle specifications
IS250C/350C_U
Multi-information display (→P. 1 7 1 )
Intuitive park-
ing assist
(
→P. 2 0 8 )
Back sensor operation
display and buzzerOnOff
Buzzer volumeLevel 3Level 1 to 5
Distance which a sensor
detects4.9 ft. (150 cm)2.0 ft. (60 cm)
Illumination
(
→P. 3 5 4 )
Time elapsed before lights
turn off15 seconds7. 5 s e c o n d s
30 seconds
Operation when the
doors are unlockedOnOff
Operation after the
“ENGINE START STOP”
switch is turned OFF
OnOff
Front foot well lightsOnOff
Shift lever lightOnOff
Outer foot lightOnOff
Available languageEnglish and French
ItemFunctionDefault settingCustomized
setting

611
Alphabetical index
IS250C/350C_U
Back-up lightsWattage .................................................568
Battery Checking ................................................427
If the vehicle has a discharged battery.................................................. 532
Preparing and checking before winter .................................... 233
Bluetooth
® audio* .............................. 303
Bluetooth® phone*..............................322
Brake Fluid .......................................................... 425
Parking brake ........................................159
Brake assist ............................................... 214
Care
Exterior ................................................... 396
Interior.......................................................401
Seat belts ............................................... 402
Cargo capacity ......................................229
Cargo hooks ...........................................375
CD changer* ..........................................264
CD player* ..............................................264
Chains....................................................... 233 Child restraint system
Booster seats, definition ...................122
Booster seats, installation ................129
Convertible seats, definition ........... 122
Convertible seats, installation ........129
Front passenger occupant
classification system ......................... 117
Infant seats, definition ......................... 122
Infant seats, installation ......................129
Installing CRS with LATCH
anchors .................................................. 127
Installing CRS with seat belts .........129
Installing CRS with top straps........132
Child safety
Airbag precautions .............................. 112
Battery precautions ..............429, 534
Child restraint system ........................ 122
How your child should wear the seat belt .......................................... 73
Installing child restraints....................126
Power window lock switch ..............83
Power window precautions ........... 85
Removed electronic key battery precautions....................................... 450
Seat belt guide.......................................... 71
Seat belt extender precautions...... 75
Seat belt precautions .......................... 74
Seat heater precautions.................. 373
Trunk precautions................................. 53
B
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.
C

612
Alphabetical index
IS250C/350C_U
Cigarette lighter....................................370
CleaningExterior ...................................................396
Interior ...................................................... 401
Seat belts................................................ 402
Clock .........................................................365
Compass ..................................................384
Condenser .............................................. 425
Console box .......................................... 358
Cooling system
Engine overheating ..........................536
Cornering assist sensors .................. 208
Cruise control Cruise control ...................................... 190
Dynamic radar crui se control .......194
Cup holder ..............................................359
Customizable features ...................... 586 Daytime running light system ............178
Defogger*
Rear window ......................................... 251
Side mirror.............................................. 251
Dimension ............................................... 552
Dinghy towing........................................ 238
Display Dynamic radar crui se control....... 194
Satellite switch mode....................... 366
Trip information.....................................172
Warning message ............................500
Do-it-yourself maintenance .............. 410
Door courtesy lights Door courtesy lights ........................ 354
Wattage ................................................. 568
Doors
Door lock .................................32, 44, 47
Door windows........................................82
Side mirrors.............................................. 79
Driver's seat belt reminder light ..... 493
Driving Correct posture................................... 104
Procedures............................................. 138
Driving position memory........................ 61D

614
Alphabetical index
IS250C/350C_U
Floor mat .................................................. 374
FluidBrake........................................................ 425
Washer ...................................................430
Fog lights Switch ....................................................... 180
Wattage................................................. 568
Foot well lights .......................................354
Front fog lights Switch ....................................................... 180
Wattage................................................. 568
Front passenger occupant
classification system ............................ 117
Front passenger's seat belt
reminder light......................................493
Front seats
Adjustment............................................... 55
Driving position memory.................... 61
Seat position memory ........................ 65
Front turn signal lights
Switch ....................................................... 158
Wattage................................................. 568 Fuel
Capacity ................................................555
Fuel gauge ................................................ 161
Fuel pump shut off system ............ 490
Information ........................................... 569
Refueling ................................................... 95
Fuel door ..................................................... 95
Fuel filler door ........................................... 95
Fuel pump shut off system.................490
Fuses ............................................................451
Garage door opener .......................... 378
Gauges ........................................................ 161
Glove box ................................................ 357
Glove box light ...................................... 357
Hands-free system for mobile phone* ............................. 322
Hazard lights Switch...................................................... 482
Head restraints Adjusting .................................................. 67
Headlight aim ......................................... 467
Headlight cleaner.................................. 189F
G
H