Page 15 of 94
15
GS350_QG_U (OM30C68U)
Engine (Ignition) Switch
■Starting the engine
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 engine cannot be started.
Press the engine switch.
The engine will crank until it starts or 
for up to 30 seconds, whichever is less.  
Continue depressing the brake pedal 
until the engine is completely started.  
The engine can be started from any 
engine switch mode.
Performing the following operations when ca rrying the electronic key on your person 
starts the engine or changes engine switch modes.
1
2
3
4 
     
        
        Page 16 of 94
16
GS350_QG_U (OM30C68U)
■Stopping the engine
Stop the vehicle.
Shift the shift lever to P.
Set the parking brake.
Press the engine switch.
Release the brake pedal and check that “P OWER ON” on the multi-information dis-
play is off.
■ Changing engine switch modes
Modes can be changed by pressing the engine switch with the 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.
IGNITION 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 engine, the 
engine switch will be turned to ACCES-
SORY mode, not to off.
1
2
3
4
5 
     
        
        Page 92 of 94

92
What to do if...
GS350_QG_U (OM30C68U)
■Starting the engine
Ensure that the shift lever is in P and 
depress the brake pedal.
Touch the Lexus emblem side of the 
electronic key to the engine switch. 
The engine switch will turn to IGNI-
TION ON mode.
When the smart access system with 
push-button start is deactivated in cus-
tomization setting, the engine switch 
will turn to ACCESSORY mode.
Firmly depress the brake pedal and 
check that   is shown on the 
multi-information display.
Press the engine switch.
In the event that the engine still cannot be operated, contact your Lexus dealer.
If the engine doesn’t start
Make sure that the correct operating procedures have been followed. Make sure that the brake pedal is firmly 
depressed when attempting to start the 
engine.
1
2
3
4
If the electronic key battery becomes depleted, replace it with a new battery. For instruc-
tions on replacing the battery, refer to the Ow ner’s Manual. If you need further assistance, 
contact your Lexus dealer.
Brake pedal
If the engine still does not st art, see the Owner’s Manual fo r more information or contact 
your Lexus dealer.