2008 Lexus GS450h key

Maintenance and care4
401
GS_HV_U
December 12, 2007 3:30 pm
4-1. Maintenance and 
care ............................... 402
Cleaning and protecting 
the vehicle exterior............ 402
Cleaning and protecting 
the vehicle interior ............. 405 4-2. Maintenance .................. 408
Maintenance 
requirements........................ 408
General maintenance ........... 410
Emission inspection and 
maintenance (I/M) 
programs ................................ 413
4-3. Do-it-yourself 
maintenance ................. 414
Do-it-yourself service 
precautions ............................ 414
Hood ............................................ 417
Positioning a floor jack .......... 418
Engine compartment ........... 420
Tires............................................ 435
Tire inflation pressure........... 445
Wheels ...................................... 449
Air conditioning filter ............ 451
Electronic key battery.......... 454
Checking and replacing 
fuses ........................................ 456
Headlight aim ........................... 471
Light bulbs ................................. 474

454
4-3. Do-it-yourself maintenance
GS_HV_U
December 27, 2007 1:38 pm
Electronic key battery
Replace the battery with a new one if it is discharged.
■You will need the following items:
●Flathead screwdriver
● Small Phillips-head sc rewdriver
● Lithium battery (CR1632)
■ Replacing the battery
Take out the mechanical key.
Remove the cover.
Remove the depleted battery.
Insert a new battery with the “+”
terminal facing up.
STEP1
STEP2
STEP3

455
4-3. Do-it-yourself maintenance
4
Maintenance and care
GS_HV_U
December 27, 2007 1:38 pm
■If the electronic key battery is discharged
The following symptoms may occur.
●The smart access system with push-button start and wireless remote control will
not function properly.
●The operational range is reduced.
■Use a CR1632 lithium battery
●Batteries can be purchased at your Lexus dealer, jewelers, or camera stores.
●Replace only with the same or equivalent type recommended by your Lexus
dealer.
●Dispose of used batteries according to the local laws.
CAUTION
■Removed battery and other parts
Keep away from children. 
These parts are small and if swallowed by a child they can cause choking.
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents.
●Always work with dry hands. 
Moisture may cause the battery to rust.
●Do not touch or move any other comp onents inside the electronic key.
●Do not bend the battery terminals.

When trouble arises5
481
GS_HV_U
December 12, 2007 3:30 pm
5-1. Essential information..... 482If your vehicle needs 
to be towed ........................... 482
If you think something is  wrong ..................................... 488
Event data recorder .............. 489 5-2. Steps to take in an

emergency .................... 491
If a warning light turns on or a 
warning buzzer sounds... ... 491
If a warning message is 
displayed................................ 500
If you have a flat tire (Vehicles 
with standard tires) ............... 517
If you have a flat tire (Vehicles 
with run-flat tires)................ 527
If the hybrid system will 
not start .................................. 528
If the shift lever cannot be 
shifted from “P”.................... 529
If you lose your keys .............. 530
If the electronic key does 
not operate properly........... 531
If the 12 volt battery is 
discharged ............................ 534
If your vehicle overheats ..... 538
If the vehicle becomes 
stuck......................................... 541

5
When trouble arises
513
5-2. Steps to take in an emergency
GS_HV_U
December 12, 2007 3:50 pm
Have the malfunction repaired immediately.After taking the specified steps to correct the suspected problem, check
that the warning message and light turn off.
InteriorbuzzerExterior buzzerWa r n i n g m e s s a g eDetailsCorrection procedure
Once(Comes on for 10 seconds.)
(Flashing)
The electronic key
is not detected
when attempting
to start the hybrid
system.Confirm the
location of
the elec-
tronic key.
Once3 times
(Flashing)
An open door
other than the
driver’s door is
closed while the
electronic key is
outside the detec-
tion range and the
“POWER” switch
is in ACCES-
SORY or ON
mode.
Confirm the
location of
the elec-
tronic key.

514
5-2. Steps to take in an emergency
GS_HV_U
December 12, 2007 3:50 pm
InteriorbuzzerExterior buzzerWa r n i n g m e s s a g eDetailsCorrection procedure
Once3 times
(Flashing)
An open door
other than the
driver’s door is
closed while the
electronic key is
outside the detec-
tion range and the
“POWER” switch
is in ACCES-
SORY or ON
mode with the
shift lever in “P”.
Tu r n t h e
“POWER”
switch to
OFF or con-
firm the
location of
the elec-
tronic key.
Contin-
uousContin-
uous
(Displayed alternately)
(Flashing)
An open door
other than the
driver’s door is
closed while the
electronic key is
outside the detec-
tion range and the
“POWER” switch
is in ACCES-
SORY or ON
mode with the
shift lever not in
“P”.
•Shift the shift lever
to “P”.
•Confirm
the loca-
tion of the
electronic
key.

5
When trouble arises
515
5-2. Steps to take in an emergency
GS_HV_U
December 12, 2007 3:50 pm
InteriorbuzzerExterior buzzerWa r n i n g m e s s a g eDetailsCorrection
procedure
Once
(Flashing)
The electronic key
battery is low.Replace the
battery.
( P. 4 5 4 )

An open door has
been closed and
the “POWER”
switch has been
turned twice to
the ACCES-
SORY mode from
OFF.
Press the
“POWER”
switch while
applying the
brakes.

(Flashing)
The steering lock
has not released
within 3 seconds
of pressing the
“POWER” switch.
The “POWER”
switch indicator
will flash green for
15 seconds.Press the
“POWER”
switch again
while turn-
ing the
steering
wheel with
the brake
pedal
depressed.

516
5-2. Steps to take in an emergency
GS_HV_U
December 12, 2007 3:50 pm
InteriorbuzzerExterior buzzerWa r n i n g m e s s a g eDetailsCorrection
procedure
OnceThe electronic key
does not operate
properly.
 P. 5 3 1
