2010 Lexus GS450h key

572
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
If the hybrid system will not start
If the hybrid system will not start even though correct starting procedures
are being followed (
P. 150), consider each of the following points.
■The hybrid system will not start even if you are carrying the cor-
rect electronic key
One of the following may be the cause of the problem.
●The electronic key battery may be discharged. (P. 575)
●There may not be sufficient fuel in the vehicle’s tank.
Add fuel to the vehicle.
●There may be a malfunction in the steering lock system.
●There may be a malfunction in the immobilizer system. (P. 99)
■The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume
One of the following may be the cause of the problem.
●The 12 volt battery may be discharged. (P. 5 7 8 )
●The 12 volt battery terminal connections may be loose or cor-
roded.
■The interior lights and headlights do not turn on, or the horn does
not sound
One of the following may be the cause of the problem.
●One or both of the 12 volt battery terminals may be discon-
nected.
●The 12 volt battery may be discharged. (P. 5 7 8 )
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.

574
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
If you lose your keys
New genuine Lexus keys can be made by your Lexus dealer using one of
the other keys and the key number stamped on your key number plate.

5
When trouble arises
575
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
If the electronic key does not operate properly
Locking and unlocking the doors, unlocking the trunk and key linked
functions
Doors
Using the mechanical key (
P. 37)
in order to perform the following
operations:
Locks all doors
Closes the windows/moon roof
(turn and hold)
Unlocks the door
Turning the key rearward unlocks
the driver’s door.
Turning the key once again unlocks
the other doors.
Opens the windows/moon roof
(turn and hold)
If communication between the electronic key and vehicle is interrupted
(
P. 45) or the electronic key cannot be used because the battery is
depleted, the smart access system with push-button start and wireless
remote control cannot be used. In such cases, the doors and trunk can be
opened or the hybrid system can be started by following the procedure
below.

576
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Tr u n k
Turn the mechanical key clock-
wise to open.
Changing “POWER” switch modes and starting the hybrid system
Put the shift lever in “P” and apply the brakes.
Touch the Lexus emblem side of
the electronic key to the
“POWER” switch.
An alarm will sound to indicate that
the start function cannot detect the
electronic key that is touched to
the “POWER” switch if any of the
doors is opened and closed while
the key is touched to the switch.
To change the “POWER” switch modes: Within 10 seconds of the
buzzer sounding, release the brake pedal and press the
“POWER” switch. Modes can be changed each time the switch is
pressed. (
P. 151)
To start the hybrid system: Press the “POWER” switch within 10
seconds after the buzzer sounds, keeping the brake pedal
depressed.
If the “POWER” switch still cannot be operated, contact your Lexus
dealer.
STEP1
STEP2
STEP3

5
When trouble arises
577
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■Stopping the hybrid system
Shift the shift lever to “P” and press the “POWER” switch as you normally do when
stopping the hybrid system.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the elec-
tronic key battery be replaced immediately when the battery depletes. (P. 4 9 4 )

578
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
If the 12 volt battery is discharged
The following procedures may be used to start the hybrid system if the 12
volt battery is discharged.
You can call your Lexus dealer or qualified repair shop.
If you have a set of jumper (or booster) cables and a second vehicle
with a 12 volt battery, you can jump start your Lexus following the steps
below.
Open the trunk using the mechanical key. (
P. 5 76 )
Remove the left-hand cover in
the trunk.
Connect the jumper cables.
Positive (+) battery terminal on your vehicle.
Positive (+) battery terminal on the second vehicle.
Negative (-) battery terminal on the second vehicle.
Negative (-) battery terminal on your vehicle.STEP1
STEP2
STEP3

617
6-2. Customization
6
Vehicle specifications
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
ItemFunctionDefault settingCustomized
setting
Door lock 
(
P. 5 5 )
Unlocking using a key
Driver’s door
unlocked in 1-
step, all doors
unlocked 
in 2-step
All doors
unlocked
in 1-step
Speed-detecting auto-
matic door lock functionOFFON
Opening driver’s door
unlocks all doors OFFON
Shifting the shift lever to
“P” unlocks all doorsONOFF
Shifting the shift lever to
position other than “P”
locks all doors
ONOFF
Pow e r w i n -
dows (
P. 8 7 )
Linked door key opera-
tionOpen and closeOpen only
Close only
Wireless remote control
linked operationOFFOpen

618
6-2. Customization
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
*1: This function cannot be customized unless power window operation
using the wireless remote control is enabled.
*2: Vehicles sold outside Canada
ItemFunctionDefault settingCustomized
setting
Moon roof
(
P. 9 0 )
Linked door key opera-
tionOpen and closeOpen only
Close only
Linked operation of com-
ponents when door key is
used
Slide onlyTilt only
Wireless remote control
linked operation
*1OFFOpen
Linked operation of com-
ponents when wireless
remote control used
*1OFF
Slide only
Tilt only
Automatic
light control
system 
(
P. 171)
Light sensor sensitivityLevel 3Levels 1 to 5
Ti m e e l a p s e d b e f o r e
headlights automatically
turn off after doors are
closed
30 seconds
0 seconds
60 seconds
90 seconds
Daytime running lightONOFF*2
Windshield
wipers and
washer 
(
P. 1 7 5 )
Switching operation when
the vehicle is stationaryONOFF
Drip prevention functionONOFF
Time elapsed before the
drip prevention function
operatesVa r i a b l e
depending on
the vehicle
speed
3 seconds