park assist Lexus GS300h 2017 Owner's Manual

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7
6
5
4
3
2
GS450h_300h_OM_OM30F92E_(EE) 3-5. Opening, closing the
windows and moon roof
Power windows............................ 193
Moon roof ...................................... 196
4-1. Before driving Driving the vehicle .................... 200
Cargo and luggage .................. 208
Trailer towing (vehicles without towing package) .....209
Trailer towing (vehicles with towing package)....................... 210
4-2. Driving procedures Power (ignition) switch ..............217
EV drive mode ............................ 222
Hybrid transmission .................. 224
Turn signal lever .......................... 231
Parking brake ..............................232
Brake Hold....................................235
4-3. Operating the lights and wipers
Headlight switch ......................... 237
AHS (Adaptive High-beam System)......................................... 241
Automatic High Beam ............. 246
Fog light switch .......................... 250
Windshield wipers and washer.................................. 251 4-4. Refueling
Opening the fuel tank cap...... 257
4-5. Using the driving support systems
Lexus Safety System+ ............... 261
PCS (Pre-Crash Safety system)......................................... 270
LKA (Lane-Keeping Assist)...........................................282
RSA (Road Sign Assist)............ 291
Dynamic radar cruise control with full-speed
range ............................................ 296
Cruise control ............................ 308
Driving mode select switch.......311
BSM (Blind Spot Monitor) ...... 314

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Pictorial index
GS450h_300h_OM_OM30F92E_(EE) Seat heater switches
*2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 362
Seat ventilator switches *2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 362
Remote Touch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 340
Lexus parking assist-sensor switch *1, 2
Rear sunshade switch *2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 380
Driving mode select switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 311
Snow mode switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 225
EV drive mode switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 222
* 1
: Refer to “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.
*2
: If equipped
1
2
3
4
5
6
7
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29
Pictorial index
GS450h_300h_OM_OM30F92E_(EE) Rear sunshade switch
*2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 380
Lexus parking assist-sensor switch *1, 2
Remote Touch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 340
Seat heater switches *2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 362
Seat ventilator switches *2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 362
Driving mode select switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 311
Snow mode switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 225
EV drive mode switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 222
* 1
: Refer to “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.
*2
: If equipped
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2. Instrument cluster
2
Instrument cluster
GS450h_300h_OM_OM30F92E_(EE) The indicators inform the driver of the operating state of the vehicle’s variou
s 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) *
6
Low outside temperature
indicator (
P. 104)
* 2
VSC 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)

199
4Driving
GS450h_300h_OM_OM30F92E_(EE) 4-1. Before driving
Driving the vehicle.................... 200
Cargo and luggage .................. 208
Trailer towing (vehicles without towing package) .....209
Trailer towing (vehicles with towing package)....................... 210
4-2. Driving procedures Power (ignition) switch ..............217
EV drive mode ............................ 222
Hybrid transmission .................. 224
Turn signal lever .......................... 231
Parking brake .............................. 232
Brake Hold....................................235
4-3. Operating the lights and wipers
Headlight switch ......................... 237
AHS (Adaptive High-beam System)......................................... 241
Automatic High Beam ............. 246
Fog light switch .......................... 250
Windshield wipers and washer.................................. 251 4-4. Refueling
Opening the fuel tank cap ..... 257
4-5. Using the driving support systems
Lexus Safety System+ ................261
PCS (Pre-Crash Safety system) ........................................ 270
LKA (Lane-Keeping Assist) .......................................... 282
RSA (Road Sign Assist) ............291
Dynamic radar cruise control with full-speed
range ............................................ 296
Cruise control ............................ 308
Driving mode select switch ...... 311
BSM (Blind Spot Monitor) ...... 314

3284-5. Using the driving support systems
GS450h_300h_OM_OM30F92E_(EE)
■Sounds and vibrations caused by the ABS, brake assist, VSC, Hill-start assist control,
TRC and VGRS systems
Any of the following conditions may occur when the above systems are operating. None
of these indicates that a malfunction has occurred.
●Vibrations may be felt through the vehicle body and steering.
●A motor sound may be heard after the vehicle comes to a stop.
■ECB operation sound
ECB operating sound may be heard in the follow ing cases, but it does not indicate that a
malfunction has occurred.
●Operating sound heard from the engine compartment when the brake pedal is oper-
ated.
●Motor sounds of the brake system heard from the front part of the vehicle when the
driver’s door is opened.
●Operating sound heard from the engine compartment when one or two minutes
passed after the stop of the hybrid system.
■EPS, VGRS and DRS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
■Automatic reactivation of TRC and VSC systems
After turning the TRC and VSC systems off, the systems will be automatically re-enabled
in the following situations:
●When the power switch is turned off
●If only the TRC system is turned off, the TR C will turn on when vehicle speed increases
If both TRC and VSC systems are turned off, automatic re-enabling will not occur when
vehicle speed increases.
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from overheating
when there is frequent steering input over an extended period of time. The steering
wheel may feel heavy as a result. Should this occur, refrain from excessive steering input
or stop the vehicle and turn the hybrid system off. The EPS system should return to nor-
mal within 10 minutes.
■Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will operate;
●The shift lever is in a position other than N or P (when starting off forward/backward on
an upward incline).
●The vehicle is stopped.
●The accelerator pedal is not depressed.
●The parking brake is not engaged.

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4-5. Using the driving support systems
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
■Automatic system cancelation of hill-start assist control
The hill-start assist control will be canc eled in any of the following situations;
●The shift lever is shifted to N or P.
●The accelerator pedal is depressed.
●The parking brake is engaged.
●Approximately 2 seconds elapse after the brake pedal is released.
■Operating conditions of emergency brake signal
When the following three conditions are me t, the emergency brake signal will operate:
●The emergency flashers are off.
●Actual vehicle speed is over 55 km/h (35 mph).
●The brake pedal is depressed in a manner that cause the system to judge from the vehi-
cle deceleration that this is a sudden braking operation.
■Automatic system cancelation of emergency brake signal
The emergency brake signal will turn off in any of the following situations:
●The emergency flashers are turned on.
●The brake pedal is released.
●The system judges from the vehicle deceleration that is not a sudden braking operation.
WARNING
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded (such as excessively
worn tires on a snow covered road).
●The vehicle hydroplanes while driving at high speed on wet or slick roads.
■Stopping distance when the ABS is operat ing may exceed that of normal conditions
The ABS is not designed to shorten the vehicle’s stopping distance. Always maintain a
safe distance from the vehicle in front of you, especially in the following situations:
●When driving on dirt, gravel or snow-covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with potholes or uneven surfaces
■TRC may not operate effectively when
Directional control and power may not be achievable while driving on slippery road
surfaces, even if the TRC system is operating.
Drive the vehicle carefully in conditions where stability and power may be lost.
■Hill-start assist control does not operate effectively when
●Do not overly rely on the hill-start assist co ntrol. The hill-start assist control may not
operate effectively on steep inclines and roads covered with ice.
●Unlike the parking brake, hill-start assist co ntrol is not intended to hold the vehicle
stationary for an extended period of time. Do not attempt to use hill-start assist con-
trol to hold the vehicle on an incline, as doing so may lead to an accident.

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7-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F92E_(EE) Tighten down the towing eyelet
securely using a wheel nut wrench
or hard metal bar.
Securely attach cables or chains to the towing eyelet.
Take care not to damage the vehicle body.
Enter the vehicle being towed and start the hybrid system.
If the hybrid system does not start,
turn the power switch to ON mode.
Shift the shift lever to N and release the parking brake.
When the shift lever cannot be shifted: P. 229
■While towing
If the hybrid system is off, the power assist for the brakes and steering will not function,
making steering and braking more difficult.
■Wheel nut wrench
Wheel nut wrench is installed in trunk. ( P. 499, 511)
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5
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7-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F92E_(EE)
(If equipped)
Indicates a malfunction in the Lexus parking assist
All assist-sensors flash.
A buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer.
(If equipped)
Indicates that Lexus parking a ssist-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 releasing the parking brake.
Warning messageDetails/Actions
(Flashes)

473
7-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F92E_(EE)
Indicates an attempt was made to release the parking
brake without depressing the brake pedal
A buzzer also sounds.
 Release the parking brake while depressing the
brake pedal.
Indicates that the shift position was changed and Drive-
Start Control was operated while depressing the accel-
erator pedal
A buzzer also sounds.
 Momentarily release the accelerator pedal.
Indicates an attempt was made to shift to 1st gear with
the shift position in S while on a slippery surface
The vehicle will not shift down from 2nd gear.
A buzzer also sounds.
 Drive the vehicle in 2nd gear or higher.
(If equipped)
Indicates that the LKA (Lane- Keeping Assist) system has
determined that the driver does not have their hands on
the steering wheel while the steering control function is on  Firmly hold the steering wheel.
Warning messageDetails/Actions
(Flashes)