2017 Lexus GS450h brake

781-2. Hybrid system
GS450h_300h_OM_OM30F92E_(EE)
■Regenerative braking
In the following situations, kinetic energy is converted to electric energy and decelera- tion force can be obtained in conjunction with the recharging of the hybrid battery (trac-tion battery).
●The accelerator pedal is released while driving with the shift lever in D or S.
●The brake pedal is depressed while driving with the shift lever in D or S.
■EV indicator
■Conditions in which the gasoline engine may not stop
The gasoline engine starts and stops automatically. However, it may not stop automati- cally in the following conditions:
●During gasoline engine warm-up
●During hybrid battery (traction battery) charging
●When the temperature of the hybrid battery (traction battery) is high or low
●When the heater is switched on
■Charging the hybrid battery (traction battery)
As the gasoline engine charges the hybrid battery (traction battery), the battery does not need to be charged from an outside source. However, if the vehicle is left parked for a
long time the hybrid battery (traction battery ) will slowly discharge. For this reason, be sure to drive the vehicle at least once every few months for at least 30 minutes or 16 km(10 miles). If the hybrid battery (traction battery) becomes fully discharged and you are
unable to start the hybrid system, contact any authorized Lexus retailer or Lexus autho- rized repairer, or any reliable repairer.
■Charging the 12-volt battery
 P. 533
■After the 12-volt battery has discharged or when the terminal has been removed and installed during exchange, etc.
The gasoline engine may not stop even if the vehicle is being driven by the hybrid battery (traction battery). If this continues for a few days, contact any authorized Lexus retailer orLexus authorized repairer, or any reliable repairer.
The EV indicator comes on when the vehicle is driven using only the electric motor (traction
motor) or the gasoline engine is stopped.

791-2. Hybrid system
1
GS450h_300h_OM_OM30F92E_(EE)
For safety and security
■Sounds and vibrations specific to a hybrid vehicle
There may be no engine sound or vibration ev en though the vehicle is able to move with the “READY” indicator is illuminated. For sa fety, apply the parking brake and make sure
to shift the shift lever to P when parked.
The following sounds or vibrations may occu r when the hybrid system is operating and are not a malfunction:
●Motor sounds may be heard from the engine compartment.
●Sounds may be heard from the hybrid battery (traction battery) behind the rear seats when the hybrid system starts or stops.
●Relay operating sounds such as a snap or so ft clank will be emitted from the hybrid bat- tery (traction battery), behind the rear se ats, when the hybrid system is started or stopped.
●Sounds from the hybrid system may be heard when the trunk lid is open.
●Sounds may be heard from the transmission when the gasoline engine starts or stops, when driving at low speeds, or during idling.
●Engine sounds may be heard when accelerating sharply.
●Sounds may be heard due to regenerative braking when the brake pedal is depressedor as the accelerator pedal is released.
●Vibration may be felt when the gasoline engine starts or stops.
●Cooling fan sounds may be heard from the air intake vents on the both sides of the rear seatback.
■Maintenance, repair, recycling, and disposal
Contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer regarding maintenance, repair, recy cling and disposal. Do not dispose of the
vehicle yourself.
■Customization
Settings (e.g. on/off operation of the EV indicator) can be changed. (Customizable features: P. 561)

831-2. Hybrid system
1
GS450h_300h_OM_OM30F92E_(EE)
For safety and security
WARNING
■Road accident cautions
Observe the following precautions to reduce the risk of death or serious injury:
●Pull your vehicle off the road, apply the parking brake, shift the shift lever to P, and
turn the hybrid system off.
●Do not touch the high voltage parts, cables and connectors.
●If electric wires are exposed inside or outside your vehicle, an electric shock may
occur. Never touch exposed electric wires.
●If a fluid leak occurs, do not touch the fluid as it may be strong alkaline electrolyte from the hybrid battery (traction battery). If it comes into contact with your skin or
eyes, wash it off immediately with a large amount of water or, if possible, boric acid solution. Seek immediate medical attention.
●If a fire occurs in the hybrid vehicle, leave the vehicle as soon as possible. Never use a
fire extinguisher that is not meant for electric fires. Using even a small amount of water may be dangerous.
●If your vehicle needs to be towed, do so with rear wheels raised. If the wheels con-
nected to the electric motor (traction motor) are on the ground when towing, the motor may continue to generate electricity. This may cause a fire. ( P. 454)
●Carefully inspect the ground under the vehicle. If you find that liquid has leaked onto
the ground, the fuel system may have been damaged. Leave the vehicle as soon as possible.

992. Instrument cluster
2
Instrument cluster
GS450h_300h_OM_OM30F92E_(EE)
Warning lights inform the driver of malfunctions in the indicated vehicle’s sys-
tems.
Warning lights
*1
Brake system warning light
( P. 460)
*2, 3
(If equipped)
“AFS OFF” indicator
( P. 462)
*2, 4Charging system warning
light ( P. 460)
*1, 3Brake hold operated
indicator ( P. 462)
*2Malfunction indicator lamp ( P. 460)
*3Parking brake indicator ( P. 462)
*2SRS warning light ( P. 460)
*1Brake system warning light ( P. 462)
*1ABS warning light
( P. 461)
Low fuel level warning light
( P. 462)
*2Electric power steering system warning light
( P. 461)
Seat belt reminder light ( P. 462)
*2, 3
(If equipped)
PCS (Pre-Crash Safety system) warning light ( P. 461)
*2
Master warning light
( P. 462)
*1
Slip indicator (P. 461)
*2
(If equipped)
Tire pressure warning light ( P. 463)
(If equipped)
LKA warning light ( P. 463)

1012. Instrument cluster
2
Instrument cluster
GS450h_300h_OM_OM30F92E_(EE)
The indicators inform the driver of the operating state of the vehicle’s various sys-
tems.
Indicators
Turn signal indicator ( P. 231) Rear fog light indicator ( P. 250)
Tail light indicator
( P. 237)
Cruise control indicator
( P. 304, 308)
Headlight high beam indicator ( P. 238)(If equipped)
Dynamic radar cruise control indicator
( P. 296)
(If equipped)
Automatic High Beam indicator ( P. 246)/
Adaptive High-beam System indicator ( P. 242)
Cruise control “SET” indicator ( P. 296, 308)
Front fog light indicator ( P. 250)(If equipped)
LKA indicator (P. 286)
*1
(If equipped)
Lexus parking assist-sensor indicator
*2
Brake hold operated indicator ( P. 235)
*3
(If equipped)
“AFS OFF” indicator ( P. 239)
*3, 4“PASSENGER AIR BAG” indicator
( P. 54)
*2, 5
Slip indicator (P. 326)*6Low outside temperature indicator ( P. 104)
*2VSC OFF indicator ( P. 327)“READY” indicator ( P. 217)
*3, 7
(If equipped)
PCS (Pre-Crash Safety system) warning light ( P. 273) EV indicator (P. 78)

1022. Instrument cluster
GS450h_300h_OM_OM30F92E_(EE)
●Drive mode indicators
Except F SPORT models
F SPORT models
*8, 9
(If equipped)
BSM (Blind Spot Monitor) outside rear view mirror indicators ( P. 314)
Parking brake indicator
( P. 232)
*2
Brake hold standby
indicator ( P. 235)(If equipped)
“BSM” (Blind Spot Monitor) indicator
( P. 314)
EV drive mode indicator
( P. 222)
Eco drive mode indicator
( P. 311)(If equipped)
“SPORT” indicator
( P. 311)
(If equipped)
“SPORT S” indicator ( P. 311)(If equipped)
“SPORT S+” indicator ( P. 311)
(If equipped)
“Customize” indicator ( P. 311) Snow mode indicator ( P. 225)
Eco drive mode indicator
( P. 311)(If equipped)
“SPORT” indicator
( P. 311)
(If equipped)
“SPORT S” indicator ( P. 311)(If equipped)
“SPORT S+” indicator ( P. 311)
(If equipped)
“CUSTOMIZE” indicator ( P. 311) Snow mode indicator ( P. 225)

1142. Instrument cluster
GS450h_300h_OM_OM30F92E_(EE)
■Energy monitor
 P. 126
■G-forces
Displays lateral G-forces on the vehicle
Also displays, around the periphery of the G-force display, the left and right
steering amount, accelerator pedal input, and brake fluid pressure
Acceleration G-force on the
vehicle
Current G-force value (analyzed
value of front/rear and left/right
G-forces)
Accelerator pedal input
Brake fluid pressure
Record of the maximum G-forces
Steering amount
Actual vehicle conditions may differ from the displayed information depending on road conditions, temperature, vehicle speed and other factors.Use this information as reference.
●Resetting the record of maximum G-forces
Press and hold to reset the record.
●Peak hold function (F SPORT models)
If lateral G-forces of 0.5 G or grea ter are generated, the G-force value
display will turn amber and be held for 2 seconds.
■Tire inflation pressure (vehicles with the tire pressure warning system)
Displays inflation pressure of each tire.
The inflation pressure of the compac t spare tire will not be displayed.
■LKA (Lane-Keeping Assist) vehicle sway warning (if equipped)
 P. 282
1
2
3
4
5
6

1172. Instrument cluster
2
Instrument cluster
GS450h_300h_OM_OM30F92E_(EE)
■G-force display
●The G-force values may not be zero even when the vehicle is parked, such as when it is parked on an incline.
●Depending on the vehicle usage conditions, the brake fluid pressure display may not
reach its maximum reading even though the brake pedal is fully depressed.
●If a 12-volt battery terminal is disconnected and reconnected, the steering amount dis- play may be disabled temporarily. After driv ing the vehicle for a while, the display will
be enabled.
●Depending on the condition of the vehicle, the brake fluid pressure display may change even when the brake pedal is not depressed.
■System check display
After turning the power switch to ON mode , opening image is displayed while system operation is checked. When the system check is complete, the normal screen will return.
■Suspension of the settings display
In the following situations, the settings disp lay using the meter control switches will be suspended.
●When a warning message appears on the multi-information display
●When the vehicle begins to move
■Tire inflation pressure (if equipped)
●It may take a few minutes to display the tire inflation pressure after the power switch is turned to ON mode. It may also take a few minutes to display the tire inflation pressureafter inflation pressure has been adjusted.
●“---” may be displayed if the tire information cannot be determined due to unfavorableradio wave conditions.
●Tire inflation pressure changes with temperature. The displayed values may also be dif-
ferent from the values measured using a tire pressure gauge.
■When disconnecting and reconnecting 12-volt battery terminals
The drive information will be reset.
■Liquid crystal display
 P. 109