2015 Lexus IS250 brake sensor

4758-2. Steps to take in an emergency
8
When trouble arises
IS350/250_U (OM53C50U)
Indicates that the vehicle is being driven at 3 mph (5 km/
h) or more with the parking brake still engaged. A buzzer also sounds.
 Release the parking brake.
Indicates that the shift lever was used to attempt to shift
to the first gear position in M mode on a slippery road
surface
The gear position will not sh ift from the second gear.
A buzzer also sounds.
 Drive the vehicle in the second or a higher gear
position.
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates a malfunction in:
• The ABS; or
• The brake assist system
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates that the engine coolant temperature is too high
A buzzer also sounds.
 P. 5 0 6
(If equipped)
Indicates that the radar sensor is dirty or covered with
ice
A buzzer also sounds.
 Clean the sensor.
(If equipped)
Indicates that the dynamic radar cruise control system is
unable to judge vehicle-to-vehicle distance
A buzzer also sounds.
 Tu r n o f f s n o w m o d e .
If the windshield wipers are on, turn them off or set
them to a mode other than AUTO or high speed
wiper operation.
Wa r n i n g m e s s a g eDetails/Actions
(U.S.A.) (Canada) (Flashes)
(U.S.A.) (Canada)

4808-2. Steps to take in an emergency
IS350/250_U (OM53C50U)
*: Refer to the separate “Scheduled Maintenance” or “Owner’s Manual Supplement”
for the maintenance interval applicable to your vehicle.
(U.S.A. only)
Indicates that all maintenance is required to correspond
to the driven distance on the maintenance schedule*.
Comes on approximately 5000 miles (8000 km) after
the maintenance data has been reset.
(The indicator will not work properly unless the mainte-
nance data has been reset.)
 Perform the necessary maintenance. Please reset
the maintenance data afte r the maintenance is per-
formed ( P. 4 0 3 )
(If equipped)
Indicates that the Automatic High Beam switch is
pressed while the headlights are in low beam.
 Turn the high beam on and press the Automatic
High Beam switch again.
(If equipped)
Indicates that, since the VSC (Vehicle Stability Control)
system was turned off, the pre-collision brake system
operation is stopped
 Turn the VSC on. ( P. 2 4 2 )
(If equipped)
Indicates that the PCS (Pre-Collision System) is not cur-
rently functional because the grille cover or the sensor is
dirty
 Check the grille cover and the sensor and clean
them if they are dirty.
Indicates that operation of large electricity consuming
systems such as the air conditioning system are sus-
pended
Stop using unnecessary electric components to
reduce electricity consumption. Wait a while until
the electric power supply is restored.
(If equipped)
Indicates that the LDA (Lane Departure Alert) system
cannot be used because the vehicle speed is lower than
approximately 32 mph (50 km/h)
Drive the vehicle at 32 mph (50 km/h) or higher.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)

562What to do if... (Troubleshooting)
IS350/250_U (OM53C50U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? ( P. 4 6 7 )
●The parking brake indicator is on
Is the parking brake released? ( P. 1 7 2 )
Depending on the situation, other type s of warning buzzer may also sound.
( P. 466, 472)

●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( P. 7 1 )
To stop the alarm, turn the engine switch to IGNITION ON mode or start the
engine.
●Is the electronic key left inside the vehicle or the moon roof opened?
Check the message on the multi-information display. ( P. 4 7 2 )
●When a warning light turns on or a warning message is displayed, refer to
P. 4 6 6 , 4 7 2 . A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed

575Alphabetical index
IS350/250_U (OM53C50U)
Odometer ....................................................81
OilEngine oil................................................. 514
Front differential oil............................. 517
Rear differential oil .............................. 517
Opener Hood ........................................................... 411
Trunk ......................................................... 109
Outer foot lights Location ................................................. 368
Replacing light bulbs ........................452
Wattage ................................................... 521
Outside rear view mirrors ................. 135 Adjusting and folding........................ 135
Blind spot monitor............................. 252
Linked mirror function when reversing ................................. 136
Mirror position memory ...................123
Outside rear view mirror defoggers ............................362
Outside temperature...............................81
Overheating, Engine .......................... 506 Paddle shift switches............................. 166
Parking assist sensors
(intuitive parking assist).................... 214
Parking brake .......................................... 172
Parking lights ........................................... 173 Light switch............................................. 173
Replacing light bulbs ....................... 452
PCS (Pre-Collision System).............246 Function .................................................. 246
PCS OFF switch .................................247
Warning light ....................................... 467
Personal lights ....................................... 369 Wattage ................................................... 521
Pop-up display ......................................... 88
Power easy access system ................. 123
Power outlet ........................................... 378
Power steering (Electric power steering system) .................................. 241 Warning light ....................................... 467
Power windows.......................................138 Door lock linked window operation ...........................140
Jam protection function....................139
Operation............................................... 138
Window lock switch ......................... 138
Pre-Collision System (PCS).............246 Function .................................................. 246
PCS OFF switch .................................247
Warning light ....................................... 467
OP
*: For vehicles with a navigation system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL”.