2013 Lexus GS300h Owner's Manual

2464-1. Before driving
GS450h_300h_OM_OM30D53E_(EE)
To maintain engine braking efficiency, when using engine brak-
ing, when driving on a long steep downgrade, do not use the
transmission in D. (P. 260)

2474-1. Before driving
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
If the engine overheats
Towing a loaded trailer up a long, steep incline in temperatures
exceeding 30C (85F) may result in the engine overheating. If
the engine coolant temperature gauge indicates that the engine is
overheating, turn the air conditioning off immediately, leave the
road and stop the vehicle in a safe place. (P. 915)
When parking the vehicle
Always place wheel chocks under the wheels of both the vehicle
and trailer. Firmly set the parking brake and shift the shift lever
to P.
CAUTION
To avoid accident or injury
Do not tow a trailer when the compact spare tire is installed on your vehi-
cle.
Do not tow a trailer when the tire installed is repaired with the emergency
tire puncture repair kit.
Do not use cruise control (if equipped) or dynamic radar cruise control (if
equipped) when trailer towing.
Vehicle speed in towing
Observe the legal maximum speeds for trailer towing.
Before descending hills or long declines
Reduce speed and downshift. However, never downshift suddenly while
descending steep or long downhill grades.
Operation of the brake pedal
Do not hold the brake pedal depressed often or for long periods of time.
Doing so may result in the brake overheating or reduce braking effects.

2484-1. Before driving
GS450h_300h_OM_OM30D53E_(EE)
NOTICE
For vehicles with an emergency tire puncture repair kit (if equipped)
Do not tow anything if a tire that has been repaired using the emergency tire
puncture repair kit is installed. The load on the tire may cause unexpected
damage to the tire.

2464-2. Driving procedures
GS450h_300h_OM_OM30D53E_(EE)
Power (ignition) switch
Check that the parking brake is set.
Check that the shift lever is set in P.
Firmly depress the brake pedal.
will be displayed on the multi-information display.
If it is not displayed, the hybrid system cannot be started.
Press the power switch.
Continue depressing the brake
pedal until the hybrid system is
completely started.
The hybrid system can be started
from any power switch mode.
Check that the “READY” indicator is on.
The vehicle will not move when the “READY” indicator is off.
Performing the following operations when carrying the electronic
key on your person starts the hybrid system or changes power
switch modes.
Starting the hybrid system
1
2
3
4
5

2474-2. Driving procedures
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
Stop the vehicle.
Shift the shift lever to P.
Set the parking brake. (P. 269)
Press the power switch.
Release the brake pedal and check that “POWER ON” on the
multi-information display is off.
Modes can be changed by pressing the power switch with brake
pedal released. (The mode changes each time the switch is
pressed.)
Off*
The emergency flashers can be
used.
The multi-information display will
not be displayed.
ACCESSORY mode
Some electrical components such
as the audio system can be used.
“POWER ON” will be displayed
on the multi-information display.
ON mode
All electrical components can be
used.
“POWER ON” will be displayed
on the multi-information display.
*: If the shift lever is in a position
other than P when turning off the
hybrid system, the power switch
Stopping the hybrid system
Changing power switch modes
1
2
3
4
5

2484-2. Driving procedures
GS450h_300h_OM_OM30D53E_(EE)will be turned to ACCESSORY
mode, not to off.

2494-2. Driving procedures
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
If the hybrid system is stopped with the shift lever in a position
other than P, the power switch will not be turned off but instead be
turned to ACCESSORY mode. Perform the following procedure to
turn the switch off:
Check that the parking brake is set.
Shift the shift lever to P.
Check that “POWER ON” and “Turn Power OFF” are displayed
alternately on the multi-information display and then press the
power switch once.
Check that “POWER ON” and “Turn Power OFF” on the multi-
information display are off.
When stopping the hybrid system with the shift lever in a
position other than P
1
2
3
4

2504-2. Driving procedures
GS450h_300h_OM_OM30D53E_(EE)
Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minutes or ON
mode (the hybrid system is not operating) for more than an hour with the
shift lever in P, the power switch will automatically turn off. However, this
function cannot entirely prevent 12-volt battery discharge. Do not leave the
vehicle with the power switch in ACCESSORY or ON mode for long periods
of time when the hybrid system is not operating.
Sounds and vibrations specific to a hybrid vehicle
P. 8 3
Electronic key battery depletion
P. 1 5 4
When the ambient temperature is low, such as during winter driving condi-
tions
It may take time until the “READY” indicator comes on.
Conditions affecting operation
P. 1 5 0
Notes for the push-start function
P. 1 5 3
If the hybrid system does not start
The immobilizer system may not have been deactivated. (P. 9 1 )
Contact any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.
Check that the shift lever is securely set in P. The hybrid system may not
start if the shift lever is displaced out of P. “Shift to P position when Start-
ing” will be displayed on the multi-information display.
Steering lock
After turning the power switch off and opening and closing the doors, the
steering wheel will be locked due to the steering lock function. Operating the
power switch again automatically cancels the steering lock.