Page 186 of 600
1863-4. Adjusting the steering wheel and mirrors 
GS450h_300h_OM_OM30F92E_(EE)
Steering wheel
Operating the switch moves the steering wheel in the following directions: 
Up 
Down 
Toward the driver 
Away from the driver 
To sound the horn, press on or close to 
the  mark.
■The steering wheel can be adjusted when 
The power switch is in ACCESSORY or ON mode*.
*: If the driver’s seat belt is fastened, the steering wheel can be adjusted regardless of 
power switch mode.
■Automatic adjustment of the steering position 
A desired steering position can be entered to  memory and recalled automatically by the driving position memory system. ( P. 178)
■Power easy access system 
The steering wheel and driver’s seat move in accordance with power switch mode and the driver’s seat belt condition. ( P. 178)
Adjustment procedure
1
2
3
4
Horn 
     
        
        Page 523 of 600

523
7 
7-2. Steps to take in an emergency
When trouble arises
GS450h_300h_OM_OM30F92E_(EE)
If the hybrid system will not start
One of the following may be the cause of the problem:
●The electronic key may not be functioning properly. ( P. 528)
●There may not be sufficient fuel in the vehicle’s tank.  
Refuel the vehicle.
●There may be a malfunction in the immobilizer system. ( P. 85)
●There may be a malfunction in the steering lock system.
●The hybrid system may be malfunctioning due to an electrical problem such 
as electronic key battery depletion or a blown fuse. However, depending on 
the type of malfunction, an interim measure is available to start the hybrid sys- 
tem. ( P. 524) 
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( P. 530)
●The 12-volt battery terminal connections may be loose or corroded.  
( P. 412) 
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( P. 530)
●One or both of the 12-volt battery terminals may be disconnected. (P. 412)
Contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable 
repairer if the problem cannot be repaired , or if repair procedures are unknown.
Reasons for the hybrid system not starting vary depending on the situation. 
Check the following and perform the appropriate procedure:
The hybrid system will not start ev en though the correct starting proce- 
dure is being followed. ( P. 217)
The interior lights and headlights are dim, or the horn does not sound or 
sounds at a low volume.
The interior lights and he adlights do not turn on, or the horn does not 
sound. 
     
        
        Page 580 of 600

580What to do if... (Troubleshooting) 
GS450h_300h_OM_OM30F92E_(EE)
●Is the window lock switch pressed? 
The power window except for the one at the driver’s seat cannot be operated 
if the window lock switch is pressed. ( P. 193)
●The auto power off function will be operated if the vehicle is left in ACCES- 
SORY or ON mode (the hybrid system is  not operating) for a period of time. 
( P. 219)
●The seat belt reminder light is flashing 
Are the driver and the front passenger wearing the seat belts? ( P. 462)
●The parking brake indicator is on 
Is the parking brake released? ( P. 232) 
Depending on the situation, other type s of warning buzzer may also sound.  
( P. 460, 466)
●Did anyone inside the vehicle open a door or anything move inside the vehicle 
during setting the alarm?  
The sensor detects them and the alarm sounds. ( P. 91) 
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 (if 
equipped)? 
Check the message on the multi-information display. ( P. 466) 
The windows do not open or close by operating the power window 
switches 
The power switch is turned off automatically  
A warning buzzer sounds during driving 
An alarm is activated and th e horn sounds (if equipped) 
A warning buzzer sounds when leaving the vehicle  
(vehicles with entry function) 
     
        
        Page 589 of 600

589Alphabetical index
GS450h_300h_OM_OM30F92E_(EE)
Hooks 
Cargo hooks........................................ 374 
Coat hooks ...........................................382 
Luggage hook..................................... 374 
Retaining hooks (floor mat)............. 34 
Horn ............................................................ 186 
Hybrid battery (traction battery) 
Location.....................................................80 
Specification .........................................549 
Hybrid battery (traction battery)  
air vents...................................................... 81 
Hybrid system ........................................... 76 
Emergency shut off system................81 
Energy monitor/ 
consumption screen.......................126 
EV drive mode ................................... 222 
High voltage components ...............80 
Hybrid System Indicator ................. 108 
Hybrid system precautions..............80 
Hybrid vehicle driving tips ..............331 
If the hybrid system  
will not start ....................................... 523 
Overheating .........................................535 
Power (ignition) switch ..................... 217 
Regenerative braking ......................... 78 
Starting the hybrid system............... 217 
Hybrid System Indicator ..................... 108 
Hybrid transmission............................. 224 
If the shift lever cannot be  
shifted from P ................................... 229 
Paddle shift switches ........................ 226 
S mode.....................................................227 
Identification ........................................... 547 
Engine ..................................................... 548 
Vehicle.................................................... 547 
Ignition switch (power switch) .......... 217 
Auto power off function ................... 219 
Changing the power switch  
modes.................................................... 218 
If your vehicle has to be  
stopped in an emergency ......... 453 
Starting the hybrid system .............. 217 
Illuminated entry system .................... 368 
Immobilizer system................................. 85 
Indicators .................................................... 101 
Initialization 
Items to initialize ................................. 576 
Moon roof ............................................... 197 
Power windows ................................... 194 
Tire pressure warning  
system.................................................... 418 
Initiators (tire pressure warning  
system)....................................................427 
Inside door handle lights ................... 366 
Inside rear view mirror ........................ 188 
Instrument panel light control ...........107 
Interior lights........................................... 366 
Intrusion sensor and tilt sensor .......... 94 
ISOFIX rigid anchors ............................ 66
I
*: Refer to the “NAVIGATION AND MULTIMEDIA 
SYSTEM OWNER’S MANUAL”.