2012 Lexus HS250h warning lights

225
2-4. Using other driving systems
2
When driving
HS250h_U_75050U
■Automatic cancelation of constant speed control
The cruise control will stop maintaining the vehicle speed in the following situations:
●Actual vehicle speed is more than approximately 10 mph (16 km/h) below the
set vehicle speed.
At this time, the memorized set speed is not retained.
●Vehicle speed falls below approximately 25 mph (40 km/h).
●Enhanced VSC is activated.
■Radar sensor and grille cover
Always keep the sensor and grille cover clean to ensure that the vehicle-to-vehicle
distance control operates properly. (Some obstructions, such as snow, ice and plas-
tic objects, cannot be detected by the obstruction sensor.)
Dynamic radar cruise control is canceled if an obstruction is detected.
■Warning lights, messages and buzzers for dynamic radar cruise control
Warning lights, messages and buzzers are used to indicate a system malfunction or
to inform the driver of the need for caution while driving. (→P. 503, 513, 516)
Grille cover
Radar sensor

234
2-4. Using other driving systems
HS250h_U_75050U
●When the lane lines cannot be recognized while driving.
●The wiper operates continuously.
●When the lane departure warning function is activated.
The lane departure warning function will be temporarily canceled and will not
resume until a few seconds elapse after it is activated.
■No-handed driving warning
If the steering wheel is not operated for about 15 seconds on a straight road or
about 5 seconds on a curve, the buzzer will beep twice, indicators on the multi-
information display will flash, and the lane keeping assist function will be temporarily
canceled. If you drive the vehicle with your hands lightly touching the steering
wheel, this may also be detected as no-handed driving.
■When the vehicle has been parked in the sun
The LKA system functions may not be available for a while after driving has started.
In such cases, turn the LKA system off and turn it on again after normal temperature
returns. When the temperature in the cabin decreases and the temperature around
the camera sensor becomes suitable for its operation, the functions will begin to
operate.
■Warning lights and messages for LKA
Warning lights and messages are used to indicate a system malfunction or to inform
the driver of the need for caution while driving. (→P. 5 0 3 , 5 1 6 )

477
4-3. Do-it-yourself maintenance
4
Maintenance and care
HS250h_U_75050U
3IGN10 A
Electronically controlled brake sys-
tem, multiport fuel injection system/
sequential multiport fuel injection sys-
tem, smart access system with push-
button start, stop lights
4MET7. 5 AMeters
5WIP30 AWindshield wipers
6WA S H E R15 AWindshield washer
7A/C10 AAir conditioning system
8GAUGE10 AAFS, turn signal lights, emergency
flasher lights
9AFS10 AAdaptive front-lighting system
10ECU-IG NO.210 A
Pre-collision system, LKA, dynamic
radar cruise control, air conditioning
system, outside rear view mirror,
HUD, navigation system, tire inflation
pressure warning system
FuseAmpereCircuit

502
HS250h_U_75050U
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
*: Brake system warning buzzer
When there is a possible problem that could affect braking performance, the
warning light will come on and a warning buzzer will sound.
Parking brake engaged warning buzzer
→ P. 5 1 6
Stop the vehicl e immediately.
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 your Lexus dealer.
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Brake system warning li ght and warning buzzer*
•Low brake fluid
• Malfunction in the brake system This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released the system is operating normally.
Warning lightWarning light/Details
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
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 nec-
essarily indicate a malfunction in the system. However, if this continues to
occur, have the vehicle inspected by your Lexus dealer.

616
Alphabetical index
HS250h_U_75050U
Cooling systemEngine overheating .......................... 552
Cruise control Cruise control ....................................... 212
Dynamic radar crui se control ....... 216
Cup holders ............................................. 381
Curtain shield airbags.......................... 109
Customizable features ...................... 584
Daytime running light system ........... 194
Defogger* Rear window.........................................274
Side mirrors ...........................................274
Dimensions............................................. 560
Dinghy towing ........................................ 262
Display
Dynamic radar cruise control.................................................... 216
Multi-information display................. 177
Trip information ................................... 180
Warning message............................... 512
Do-it-yourself maintenance .............. 431
Door courtesy lights Door courtesy lights......................... 374
Wattage................................................. 568
Doors
Door glasses ........................................... 90
Door lock.................................. 47, 58, 61
Rear door child protector ................ 62
Side doors .................................................. 61
Side mirrors ............................................. 87
Driver’s seat belt reminder light .... 505
Driver’s seat position memory ........... 72
Driving
Break-in tips ........................................... 143
Correct posture ................................... 107 Procedures............................................. 142
Winter driving tips ............................ 258
Driving position memory.......................72
Electric power steering...................... 238
Electronic key If the electronic key does not operate properly............................ 544
Emergency, in case of If the electronic key does not
operate properly............................ 544
If the engine will not start ................. 541
If the hybrid system will not start ......................................................... 541
If the 12-volt battery is discharged .........................................547
If the warning buzzer sounds...... 502
If the warning light turns on.......... 502
If the warning message is displayed .............................................. 512
If you have a flat tire ........................ 532
If you lose your keys ........................ 543
If you think something is wrong ....................................................501
If your electronic key does not operate properly ................... 544
If your vehicle becomes stuck .... 556
If your vehicle has to be stopped in an emergency ............................558
If your vehicle needs to be
towed ................................................... 495
If your vehicle overheats................ 552
Emergency flasher Switch ...................................................... 494
Engine Accessory mode ................................. 153
D
E

622
Alphabetical index
HS250h_U_75050U
Fog light switch................................... 202
Ignition switch........................................152
Light switches ......................................... 191
Mode select switch............................. 162
Power door lock switch ...................... 61
Power switch ......................................... 152
Power window switch ........................ 90
Talk switch................................328, 347
Telephone switch .............................. 347
Tire pressure warning reset switch ................................................... 453
Window lock switch ........................... 90
Wiper and washer switch ............. 204
Tail lights Replacing light bulbs..........................491
Switch ......................................................... 191
Wattage................................................. 568
Talk switch* ................................. 328, 347
Telephone switch*................................ 347
Theft deterrent system Alarm ........................................................ 103
Immobilizer system.............................. 101
Theft prevention labels ........................ 106
TILT switch*
Tire inflation pressure .........................459
Tire information Glossary.................................................578
Size ........................................................... 575
Tire identification number ............. 574
Uniform Tire Quality Grading.... 576
Tires
Chains ..................................................... 259
Checking .................................................451
Compact spare tire .......................... 532
If you have a flat tire .......................... 532 Inflation pressure ............................... 459
Inflation pressure sensor ............... 452
Information ............................................572
Replacing .............................................. 532
Rotating tires.......................................... 451
Size ........................................................... 567
Snow tires.............................................. 258
Spare tire ............................................... 532
Tire pressure warning
system....................................... 451, 505
Tools........................................................... 532
Total load capacity ............................... 257
Towing Dinghy towing .....................................262
Emergency towing ........................... 495
Trailer towing ........................................ 261
TRAC ........................................................ 238
Traction control..................................... 238
Trailer towing ...........................................261
Trip meter ..................................................169
Trunk Opener ......................................................64
Turn signal lights Replacing light bulbs ......................... 481
Switch ........................................................ 166
Wattage .................................................568
Vanity lights Vanity lights.......................................... 386
Wattage .................................................568
Vanity mirrors ........................................ 386
Vehicle identification number ......... 560
Vehicle stability control ..................... 238
Ventilators ...............................................389
VIEW button*
VSC ........................................................... 238
T
V

623
Alphabetical index
HS250h_U_75050U
Warning buzzersBrake system ....................................... 502
Open door ..........................................505
Seat belt reminder ............................505
Warning lights AFS OFF ...............................................503
Anti-lock brake system ..................503
Brake assist system ..........................503
Brake system ....................................... 502
Charging system ............................... 502
Cruise control .....................................503
Electric power steering
warning light .....................................503
Electronic engine control
system..................................................503
High coolant temperature ............ 502
LKA ..........................................................503
Low fuel level.......................................505
Low tire pressure ..............................505
Malfunction indicator lamp ..........503
Master warning light ........................505
Open door ...........................................505
Pre-collision system .........................503
Pretensioner.........................................503
Radar cruise co ntrol ........................503
Seat belt reminder light ..................505
Slip indicator ........................................503
SRS airbags ..........................................503
Tire pressure warning light...........505 Warning messages
Cruise control....................................... 513
Dynamic radar cruise control .........................................513, 516
Electric power steering system ................................................... 513
Engine oil maintenance ................... 516
Engine oil pressure ............................ 512
EV drive mode..................................... 516
Headlight................................................. 513
Hood ......................................................... 516
Hybrid system....................................... 512
Intuitive parking assist .............513, 516
Key.............................................................524
Lane-Keeping Assist ......................... 516
Moon roof .............................................. 516
Open door ............................................. 516
Parking brake ....................................... 516
Pre-collision system.................513, 516
Smart access system with push start ............................................524
Tire pressure warning
system ................................................... 516
Trunk ......................................................... 516
Washer fluid .......................................... 516
Washer
Checking ...............................................446
Preparing and checking before winter ................................... 258
Switch.......................................................204
Washing and waxing ............................ 416
Weight Cargo capacity ................................... 257
Load limits ............................................. 257
Weight.................................................... 560
*: For vehicles with a navigation system, refer to “Navigation System Owner’s Manual”.
W

627
What to do if...
HS250h_U_75050U
■Warning lights
*1: Slip indicator comes on.
*2: The light flashes to indicate a malfunction.
P. 5 0 4
or
P. 5 0 2P. 5 0 4
P. 5 0 2P. 5 0 4
P. 5 0 3P. 5 0 4
P. 5 0 3P. 5 0 4
P. 5 0 5
or
P. 5 0 3P. 5 0 5
P. 5 0 3P. 5 0 5
P. 5 0 5
or
P. 5 0 3P. 5 0 5
P. 5 0 4P. 5 0 5
P. 5 0 4P. 5 0 6
Brake system warning light“AFS OFF” indicator light*2
Slip indicator light*1
Charging system warning
light“LKA” indicator light*2
High engine coolant temperature
warning lightCruise control indicator
light*2
Brake system warning lightRadar cruise control
indicator light*2
Malfunction indicator lampAutomatic High Beam
indicator light*2
Open door warning light
SRS warning lightLow fuel level warning light
“ABS” warning lightDriver’s seat belt reminder
light
Front passenger’s seat belt
reminder light
Electric power steering system warning lightMaster warning light
“PCS” warning light*2Tire pressure warning light