
4826-5. Using the other interior features
IS200t_EE(OM53D77E)
WARNING
■When the Emergency Call may not be made
●Any of the followings may occur. In such cases, report to the Public Safety Answering
Point (PSAP) by other means such as nearby public phones.
• It may sometimes be difficult to connect to the public Safety Answering Point(PSAP) even in the reception area of the cellular phone due to the reception level,
or if the line is busy. In such cases, you may not be able to connect to the Public
Safety Answering Point (PSAP) and thus w ill not be able to make emergency calls
and report to the emergency departments even though the system tries to con-
nect to the Public Safety Answering Point (PSAP).
• When the vehicle is out of the cellular phone service area, the Emergency Call cannot be made.
• When any related equipment (such as th e “SOS” button panel, indicator lights,
microphone, speaker, DCM, antenna, or any wires connecting the equipment.)
has an abnormality, is damaged or broken, the Emergency Call cannot be made.
• During the Emergency Call, the system makes repeated attempts to connect to
the Public Safety Answering Point (PSAP). However, if it cannot connect to the
Public Safety Answering Point (PSAP) due to poor radio wave reception, the sys-
tem may not be able to connect to the cellular network and the call may finish with-
out connecting. The red indicator light will blink for approximately 30 seconds to
indicate this disconnection.
• This device may not function if a shock is applied to it.
●If the battery's voltage decreases or there is a disconnection, the system may not be
able to access the Public Safety Answering Point (PSAP).
■When replacing DCM to a new one
●ERA-GLONASS have to be activated. Contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.

5137-3. Do-it-yourself maintenance
7
Maintenance and care
IS200t_EE(OM53D77E)
■Situations in which the tire pressure warning system may not operate properly
●In the following cases, the tire pressure warning system may not operate properly.
• If non-genuine Lexus wheels are used.
• A tire has been replaced with a tire that is not an OE (Original Equipment) tire.
• A tire has been replaced with a tire that is not of the specified size.
• Tire chains etc. are equipped.
• An auxiliary-supported run-flat tire is equipped.
• If a window tint that affects the radio wave signals is installed.
• If there is a lot of snow or ice on the vehi cle, particularly around the wheels or wheel
housings.
• If the tire inflation pressure is extr emely higher than the specified level.
• If tires not equipped with tire pressure warning valves and transmitters are used.
• If the ID code on the tire pressure warning valves and transmitters is not registered in the tire pressure warning computer.
●Performance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio station, large display, air-
port or other facility that generates st rong radio waves or electrical noise
• When carrying a portable radio, cellular phone, cordless phone or other wireless communication device
●When the vehicle is parked, the time taken for the warning to start or go off could be
extended.
●When tire inflation pressure declines rapi dly for example when a tire has burst, the
warning may not function.
■The initialization operation
●Make sure to carry out initialization af ter adjusting the tire inflation pressure.
Also, make sure the tires are cold before carrying out initialization or tire inflation pres-
sure adjustment.
●If you have accidentally turned the engine swit ch off during initialization, it is not neces-
sary to press the reset switch again as init ialization will restart automatically when the
engine switch has been turned to IGNITION ON mode for the next time.
●If you accidentally press the reset switch when initialization is not necessary, adjust the
tire inflation pressure to the specified leve l when the tires are cold, and conduct initial-
ization again.
■Warning performance of the tire pressure warning system
The warning of the tire pressure warning syst em will change in accordance with the con-
ditions under which it was initialized. For this reason, the system may give a warning even
if the tire pressure does not reach a low enough level, or if the pressure is higher than the
pressure that was adjusted to when the system was initialized.

652
IS200t_EE(OM53D77E)
What to do if... (Troubleshooting)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new genuine mechanical keys can be made
by any authorized Lexus retailer or Le xus authorized repairer, or any reliable
repairer. ( P. 124)
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact any authorized Lexus retailer or Lexus authorized repairer, or any
reliable repairer immediately. ( P. 127)
●Is the electronic key battery weak or depleted? ( P. 527)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. ( P. 205)
●Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the electronic key on your
person.
●The function may not operate properly due to the condition of the radio wave.
( P. 143)
●Is the child-protector lock set?
The rear door cannot be opened from inside the vehicle when the lock is set.
Open the rear door from outside and then unlock the child-protector lock.
( P. 132)
If you have a problem, check the following before contacting any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer.
The doors cannot be locked, unlocked, opened or closed
You lose your keys
The doors cannot be locked or unlocked
The rear door cannot be opened

657Alphabetical index
IS200t_EE(OM53D77E)
Anti-lock Brake System (ABS) .......340Warning light ...................................... 555
Approach warning ................................ 281
Armrest ..................................................... 477
Assist grips .............................................. 479
Audio input ..............................................359
Audio system .......................................... 352 Audio CD player .............................. 380
Audio input ...........................................359
AUX port/
USB port ............................................359
Bluetooth
® audio ..............................404
iPod.......................................................... 386
Optimal use .......................................... 370
Portable music player......................395
Radio ........................................................378
Steering wheel audio switch ....... 358
USB memory...................................... 390
Automatic headlight leveling system ................................................... 220
Automatic High Beam .........................221
Automatic light control system ....... 218
AUX port .................................................359
Average fuel economy......... 116, 117, 119
Average vehicle speed ......................... 116 Back-up light
Replacing light bulb ......................... 540
Battery....................................................... 505
Battery checking................................505
If the vehicle has discharged battery....................................................618
Preparing and checking
before winter.................................... 346
Warning light....................................... 554
Blind Spot Monitor (BSM) .............. 324
Blower customization......................... 459
Bluetooth®
Audio system....................................... 404
Hands-free system (for cellular phone) ....................... 405
Bottle holders......................................... 470
Brake Fluid .......................................................... 637
Parking brake ........................................ 217
Warning light....................................... 554
Brake assist ............................................ 340
Break-in tips .............................................187
Brightness control
Instrument panel light control ........ 96
BSM (Blind Spot Monitor) ............... 324
Blind Spot Monitor function ........ 330
Rear Crossing Traffic Alert function.................................... 333
B

667Alphabetical index
IS200t_EE(OM53D77E)
Radar cruise control (dynamic radar cruise control) ........................ 274
Radiator ....................................................504
Radio .......................................................... 378
Rear Crossing Traffic Alert ..............333
Rear fog light .......................................... 225 Replacing light bulb......................... 540
Switch ...................................................... 225
Rear passengers’ seat belt
reminder lights.................................... 557
Rear seat.................................................... 159
Fold down the seatback .................. 159
Luggage security system ................. 137
Rear personal lights ............................. 466 Wattage..................................................639
Rear sunshade ....................................... 477 Operation.............................................. 477
Reverse operation feature ............ 477
Rear turn signal lights........................... 216
Replacing light bulbs....................... 540
Turn signal lever ...................................216
Rear view mirror Inside rear view mirror........................171
Outside rear view mirrors............... 173 Rear view monitor system ................308
Rear window defogger ..................... 458
Refueling .................................................. 234
Capacity................................................. 632
Fuel types .............................................. 632
If the fuel filler door cannot
be opened ......................................... 236
Opening the fuel tank cap............ 236
Remote Touch
*.................................... 444
Replacing
Electronic key battery ......................527
Fuses ........................................................ 530
Light bulbs ............................................ 534
Tires............................................................601
Rev indicator ............................................. 95
Rev peak ..................................................... 95
RSA (Road Sign Assist) ..................... 269
R
*: For vehicles with a 10.3-inch display, refer to
“NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.