brake Lexus IS200t 2015 Repair Manual

5008-2. Steps to take in an emergency
IS200t_EE(OM53D19E)
If a warning light turns on or a warning buzzer
sounds
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 necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspected by any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
Brake system warning light (warning buzzer)*1
Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning
→ Immediately stop the vehicle in a safe place and contact any
authorized Lexus dealer or repairer, or another duly qualified
and equipped professional. Continuing to drive the vehicle may
be dangerous.
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
→ Immediately stop the vehicle in a safe place and contact any
authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.
Malfunction indicator lamp
Indicates a malfunction in:
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic automatic transmission control system
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner system
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.

5018-2. Steps to take in an emergency
8
When trouble arises
IS200t_EE(OM53D19E)
ABS warning lightIndicates a malfunction in:
•The ABS; or
• The brake assist system
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
Electric power steering system warning light (warning buzzer)
Indicates a malfunction in the EPS (Electric Power Steering) sys-
tem
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
(Flashes)
(If equipped)
Pre-crash safety system warning light Indicates a malfunction in the PCS (Pre-Crash Safety system)
The warning light will operate as follows, even when the system is
not malfunctioning:
• The light will flash quickly when the system is operating. (→ P. 2 9 1 )
• The light will turn on when the pre-crash safety system is dis- abled. ( →P. 2 9 2 )
• The light will turn on when the VSC (Vehicle Stability Control)
system is disabled. ( →P. 2 8 8 )
• The light will flash when the system cannot temporarily be used.
(→ P. 5 1 5 )
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
Slip indicator
Indicates a malfunction in:
• The VSC (Vehicle Stability Control) system;
• The TRC (Traction Control) system; or
• The hill-start assist control system
The light will flash when the VSC or the TRC system is operating.
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
Automatic headlight leveling system warning light
Indicates a malfunction in the au tomatic headlight leveling system
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
Warning lightWarning light/Details/Actions

5028-2. Steps to take in an emergency
IS200t_EE(OM53D19E)
*1: Parking brake engaged warning buzzer:→ P. 5 0 9
*2: Open door warning buzzer:
→ P. 5 0 8
Warning lightWarning light/Details/Actions
Open door warning light (warning buzzer)*2
Indicates that a door or the trunk is not fully closed
→ Check that all the doors and the trunk are closed.
Low fuel level warning light
Indicates that remaining fuel is a pproximately 10 L (2.6 gal., 2.2 Imp.
gal.) or less
→ Refuel the vehicle.
Driver’s and front passenger’s seat belt reminder light (warning
buzzer)
*3
Warns the driver and/or front passenger to fasten their seat belts
→ Fasten the seat belt.
If the front passenger’s seat is occupied, the front passenger’s
seat belt also needs to be fastened to make the warning light
(warning buzzer) turn off.
Rear passengers’ seat belt reminder lights (warning buzzer)*3
Warns the rear passengers to fasten their seat belts
→ Fasten the seat belt.
Master warning light
A buzzer sounds and the warning light comes on and flashes to
indicate that the master warning system has detected a malfunc-
tion.
→ P. 5 0 6
(If equipped)
Tire pressure warning light
When the light comes on:
Low tire inflation pressure such as
• Natural causes ( →P. 5 0 3 )
• Flat tire ( →P. 5 2 2 , 5 3 3 )
→ Adjust the tire inflation pre ssure to the specified level.
The light will turn off after a few minutes. In case the light does
not turn off even if the tire inflation pressure is adjusted, have the
system checked by any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
When the light comes on af ter blinking for 1 minute:
Malfunction in the tire pressure warning system
→ Have the system checked by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.

5048-2. Steps to take in an emergency
IS200t_EE(OM53D19E)
■If the tire pressure warning light frequently comes on after blinking for 1 minute (if
equipped)
If the tire pressure warning light frequently comes on after blinking for 1 minute when the
engine switch is turned to IGNITION ON mode, have it checked by any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional.
■Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.
CAUTION
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact any authorized Lexus dealer
or repairer, or another duly qualified and equipped professional. 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 us ual when operating, hold firmly and oper-
ate using more force than usual.
■If the tire pressure warning light comes on (if equipped)
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.
XVehicles with a compact spare tire
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
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 authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes.
XVehicles with an emergency tire puncture repair kit
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
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, repair the
flat tire by using emergency tire puncture repair kit.
●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.

5078-2. Steps to take in an emergency
8
When trouble arises
IS200t_EE(OM53D19E)
Warning message and warning buzzer list
Wa r n i n g m e s s a g eDetails/Actions
(If equipped)
Indicates that:
• There is a high possibility of a frontal collision; or
• The pre-crash braking function is operatingA buzzer also sounds.
→ Slow the vehicle by applying the brakes.
Indicates that the engine was stopped with the shift lever
not in P A buzzer also sounds.
→ Shift the shift lever to P.
Indicates that the engine was stopped while driving
A buzzer also sounds.
→ Stop the vehicle in a safe place such as the shoulder
of a road.
(If equipped)
Indicates that your vehicle is nearing the vehicle ahead
(in vehicle-to-vehicle distance mode)
A buzzer also sounds.
→ Slow the vehicle by applying the brakes.
(If equipped)
Alerts the driver that the vehicle has deviated from the
lane (while the LDA [Lane Departure Alert] system is
operating)
The lane line on the side the vehicle has deviated from
flashes in yellow.
The warning buzzer sounds continuously.
→ Check around the vehicle and back to inside of the
lane lines.
(Flashes)
(Flashes)
(Flashes)

5088-2. Steps to take in an emergency
IS200t_EE(OM53D19E)
Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioningA buzzer also sounds.
→ Immediately stop the vehicle in a safe place and
contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
Continuing to drive the vehicle may be dangerous.
Indicates that one or more of the doors is not fully closed
The system also indicates which doors are not fully
closed.
If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate that
the door(s) are not yet fully closed.
→ Make sure that all the doors are closed.
Indicates that the hood is not fully closed
If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate that
the hood is not yet fully closed.
→ Close the hood.
Indicates that the trunk is not fully closed
If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate that
the trunk is not yet fully closed.
→ Close the trunk.
(If equipped)
Indicates a malfunction in th e Lexus parking assist-sen-
sor The assist-sensors flash.
A buzzer also sounds.
→ Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)

5098-2. Steps to take in an emergency
8
When trouble arises
IS200t_EE(OM53D19E)
(If equipped)
Indicates that a Lexus parking assist-sensor is dirty or
covered with iceA buzzer also sounds.
→ Clean the sensor.
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system
A buzzer also sounds.
→ Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the vehicle is being driven at 5 km/h (3
mph) 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 shift 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; or
• The seat belt pretensioner system
A buzzer also sounds.
→ Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)

5108-2. Steps to take in an emergency
IS200t_EE(OM53D19E)
Indicates a malfunction in:
•The ABS; or
• The brake assist systemA buzzer also sounds.
→ Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the engine coolant temperature is too high
A buzzer also sounds.
→ P. 5 5 7
(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.
(If equipped)
Indicates that the LDA (Lane Departure Alert) system is
suspended (The camera sensor temperature is higher
than the operation temperature range)
A buzzer also sounds.
→ Restart the LDA after driving for a while.
(If equipped)
Indicates that a Blind Spot Monitor sensor or the sur-
rounding area on the bumper is dirty or covered with ice
A buzzer also sounds.
→ Clean the sensor and its surrounding area on the
bumper.
Wa r n i n g m e s s a g eDetails/Actions

5138-2. Steps to take in an emergency
8
When trouble arises
IS200t_EE(OM53D19E)
Indicates a malfunction in the brake override systemA buzzer also sounds.
→ Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that engine oil level is low
A buzzer also sounds.
→ Check the level of engine oil, and add if necessary.
Indicates a malfunction in:
• The automatic headlight leveling system; or
• The Automatic High Beam system (if equipped)
• The LED headlight system (if equipped)
A buzzer also sounds.
→ Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the accelerator and brake pedal are being
depressed simultaneously
→Release the accelerator or brake pedal.
Indicates that the washer fluid level is low
→Add washer fluid.
Indicates that remaining fuel is approximately 10 L (2.6
gal., 2.2 Imp. gal.) or less
→Refuel the vehicle.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)

5148-2. Steps to take in an emergency
IS200t_EE(OM53D19E)
Indicates that the TRC (Traction Control) system has
been deactivated
→ Tu r n t h e T R C o n . ( →P. 2 8 7 )
Indicates that the engine oil is scheduled to be changed.
(The indicator will not work properly unless the message
has been reset.)
→ Check the engine oil, and change if necessary.
After changing the engine oil, the message should
be reset.
(If equipped)
Indicates that the fuel in jectors require maintenance
soon
→ Have any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional
add injector cleaner to the fuel tank and reset the
message as necessary.
Indicates that the engine oil should be changed. (After
the engine oil is changed and the message has been
reset.)
→Check and change the engine oil, and oil filter by
any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional. After
changing the engine oil, the message should be
reset.
(If equipped)
Indicates that the fuel injectors require maintenance
→ Have any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional
add injector cleaner to the fuel tank and reset the
message.
(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-crash brake system oper-
ation is stopped
→Tu r n t h e V S C o n . ( →P. 2 8 8 )
Wa r n i n g m e s s a g eDetails/Actions