2018 Lexus GS450h brake sensor

254
GS450h_OM_OM30G62U_(U)
4-5. Using the driving support systems
■Conditions under which the vehicle-to-vehicle distance control mode may not function
correctly
In the case of the following conditions, o perate the brake pedal (or accelerator pedal,
depending on the situ ation) as necessary.
As the sensor may not be able to correctly detect vehicles ahead, the system may not
operate properly.
●When the vehicle ahead of you decelerates suddenly
●Preceding vehicle has an extremely high
ground clearance
●When the road curves or when the lanes are
narrow
●When steering wheel operation or your posi-
tion in the lane is unstable

4057-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
7
When trouble arises
Electric power steering system warning light (warning buzzer)
Indicates a malfunction in the EPS (Electric Power Steering) sys-
tem
→ Have the vehicle inspected by your Lexus dealer immediately.
(Flashes or illuminates)
(If equipped)
PCS warning lightIndicates a malfunction in the PCS (Pre-Collision System) or that
the system is temporarily unavailable due to the vehicle being
extremely hot/cold, or dirt ar ound a front sensor, etc. (→P. 233,
410)
→ Follow the instructions displayed on the multi-information dis-
play. ( →P. 233, 410)
If the PCS (Pre-Collision System ) or VSC (Vehicle Stability Con-
trol) system is disabled, the PC S warning light will illuminate.
→ P. 233
Slip indicator
Indicates a malfunction in:
• The VSC system;
• The TRAC system; or
• The hill-start assist control system;
→ Have the vehicle inspected by your Lexus dealer immediately.
The light will flash when the VSC, TRAC or ABS system is operat-
ing.
(Flashes)
(If equipped)
“AFS OFF” indicator
Indicates a malfunction in the adaptive front-lighting system
→ Have the vehicle inspected by your Lexus dealer immediately.
(Flashes)
Brake hold operated indicator
Indicates a malfunction in the brake hold system
→ Have the vehicle inspected by your Lexus dealer immediately.
Warning lightWarning light/Details/Actions

4137-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
7
When trouble arises
(If equipped)
Indicates a malfunction in the Lexus parking assist
All assist-sensors flash.
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
(If equipped)
Indicates that Lexus parking as sist-sensor is dirty or cov-
ered with ice A buzzer also sounds.
→ Clean the sensor.
Indicates an attempt was made to release the parking
brake with a door open or the front passenger’s seat belt
unfastened
A buzzer also sounds.
→ Close all doors and fasten the front passenger’s seat
belt before releasin g the parking brake.
Warning messageDetails/Actions
(Flashes)

4207-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
(If equipped)
Indicates that the radar sensor is dirty or covered with
iceA buzzer also sounds.
→ Clean the sensor.
(If equipped)
Indicates that the dynamic radar cruise control system
cannot be used temporarily due to bad weather
A buzzer also sounds.
→ Use the radar cruise control system when it
becomes available again.
(If equipped)
Indicates that the radar cruise control system brake con-
trol function is temporarily unavailable
A buzzer also sounds.
→ Depress the brake.
Indicates a malfunction in the smart access system with
push-button start
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
Warning messageDetails/Actions
(Flashes)

4217-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
7
When trouble arises
(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.
Indicates a malfunction in th e cruise control system or
dynamic radar cruise control system (if equipped)
Press the “ON/OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
(If equipped)
Indicates a malfunction in the dynamic radar cruise con-
trol with full-speed range
Depress the brake pedal.
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
(If equipped)
Indicates a malfunction in the LKA (Lane-Keeping
Assist) system
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
Warning messageDetails/Actions

526What to do if... (Troubleshooting)
GS450h_OM_OM30G62U_(U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? (→P. 406)
●The parking brake indicator is on
Is the parking brake released? ( →P. 196)
Depending on the situation, other types of warning buzzer may also sound.
(→ P. 404, 410)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. (→ P. 77)
To stop the alarm, turn the power switch to ON mode or start the hybrid system.
●Is the electronic key left inside the vehicle or the moon roof opened?
Check the message on the multi-information display. (→ P. 410)
●When a warning light turns on or a warning message is displayed, refer to
P. 404, 410.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

538Alphabetical index
GS450h_OM_OM30G62U_(U)
Paddle shift switches .............................. 191
Parking assist sensors (intuitive parking assist)
*
Parking brake...........................................196 If the parking brake cannot be released ........................452
Operation ............................................... 196
Parking brake engaged warning buzzer ................................ 410
Parking brake engaged warning message ............................ 410
Parking lights ..........................................200 Light switch .......................................... 200
Replacing light bulbs ........................393
Welcome light illumination cont rol ..........................123
PCS (Pre-Collision System) ............ 223 Function .................................................. 223
Warning light ...................................... 405
Warning message .............................. 410
Personal lights........................................305
Power control unit .................................. 70
Power control unit coolant ...............358 Capacity .................................................475
Checking............................................... 358
Preparing and checking before winter .................................................... 276 Power easy access system ................. 145
Power outlets ........................................... 315
Power steering (Electric Power
Steering system).................................269 Warning light .......................................405
Warning message...............................410
Power switch............................................ 182 Auto power off function ...................184
Changing the power switch modes ................................................... 183
If your vehicle has to be stopped in an emergency............................. 397
Starting the hybrid system...............182
Power trunk opener and closer ....... 128
Power windows....................................... 160 Door lock linked window operation ............................ 161
Jam protection function................... 160
Operation............................................... 160
Window lock switch ......................... 160
Pre-Collision System (PCS).............223 Function .................................................. 223
Warning light .......................................405
Warning message...............................410
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