2010 Lexus GS450h suspension

500
4-3. Do-it-yourself maintenance
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Fuse layout and amperage ratings
■Engine compartment
FuseAmpereCircuit
1FR CTRL-B25H-LP HI, HORN
2RELIEF VLV10Fuel system
3ETCS10
Multiport fuel injection system/
sequential multiport fuel injection
system
4H-LP CLN30Headlight cleaner
5STB-AM30Active stabilizer suspension system
6DEICER25
7FR CTRL-AM30FR TAIL, FR FOG, WASH

509
4-3. Do-it-yourself maintenance
4
Maintenance and care
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■Luggage compartment 
(vehicles with active stabilizer suspension system)
FuseAmpereCircuit
1STB FR50Front stabilizer
2STB RR30Rear stabilizer
3STB DC/DC30DC/DC converter
■After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb may
need replacement. (P. 5 1 4 )
●If the replaced fuse blows again, have the vehicle inspected by your Lexus
dealer.
■If there is an overload in the circuits
The fuses are designed to blow before the entire wiring harness is damaged.

5
When trouble arises
531
5-1. Essential information
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■Visible symptoms
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
●Flat-looking tires or uneven tire wear
●Engine coolant temperature gauge needle continually points
higher than normal
■Audible symptoms
●Changes in exhaust sound
●Excessive tire squeal when cornering
●Strange noises related to the suspension system
●Pinging or other noises related to the hybrid system
■Operational symptoms
●Engine missing, stumbling or running rough
●Appreciable loss of power
●Vehicle pulls heavily to one side when braking
●Vehicle pulls heavily to one side when driving on a level road
●Loss of brake effectiveness, spongy feeling, pedal almost touches
the floor

546
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Wa r n i n g m e s s a g eDetails
(If equipped)
Malfunction in the active stabilizer suspension sys-
tem.

(If equipped)Malfunction in the PCS.
(Flashing)
(If equipped)
Malfunction in the radar cruise control system.
Stop the vehicle in a safe place. Turn the “POWER”
switch to OFF and then to ON mode again to reset
the cruise control system.
Malfunction in the charging system.
Malfunction in the power steering system.

568
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
CAUTION
■When using the compact spare tire
●Remember that your spare tire is specifically designed for use with your vehicle.
Do not use your spare tire on another vehicle.
●Do not use two spare tires simultaneously.
●Replace the spare tire with a standard tire as soon as possible.
●Avoid sudden acceleration, deceleration and braking, as well as sharp cornering.
■Speed limit when using the compact spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a compact spare tire is
installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failing to observe
this precaution may lead to an accident causing death or serious injury.
■When the compact spare tire is attached
The vehicle speed may not be correctly detected, and the following systems may
not operate correctly:
●ABS
●Brake assist
●Enhanced VSC
●TRAC
●EPS
●VGRS
●VDIM
●Cruise control (if equipped)
●Dynamic radar cruise control (if equipped)
●Navigation system (if equipped)
●Intuitive parking assist (if equipped)
●Rear view monitor system
●Active stabilizer suspension system (if equipped)
●AV S

630
GS_HV_U (OM30C81U)
February 1, 2010 11:29 am
Alphabetical index
Alphabetical index
A/C ............................................................259
ABS.............................................................. 214
ACCESSORY mode ............................151
Active stabilizer suspension 
system...................................................... 214
Adaptive variable 
suspension system ............................. 213
Air conditioning system
Air conditioning filter .........................491
Automatic air conditioning 
system .................................................. 259
Airbags
Airbag operating conditions........... 110
Airbag precautions for 
your child................................................114
Airbag warning light ........................535
Curtain shield airbag 
precautions ........................................... 117
General airbag precautions ............114
Locations of airbags...........................107
Modification and disposal of 
airbags .................................................... 118
Proper driving posture .................... 105
Side airbag precautions .....................114
Side and curtain shield airbags 
operating conditions ....................... 110
SRS airbags ............................................107Alarm ............................................................ 101
Antenna .................................................... 279
Anti-lock brake system ........................214
Armrest ......................................................415
Ashtrays..................................................... 410
Audio input................................................341
Audio system
Antenna................................................... 279
Audio input............................................. 341
AUX port ................................................ 341
Bluetooth
® audio ............................... 321
CD player/changer ......................... 282
DVD information ................................ 310
DVD player/changer ......................293
DVD video/audio..............................293
iPod
®.......................................................329
MP3/WMA disc............................... 289
Optimal use ......................................... 339
Portable music player ....................... 341
Radio ........................................................ 273
Steering switches ...............................342
USB memory .......................................329
Video CD ............................................. 307
Automatic headlight leveling 
system ...................................................... 173
Automatic light control system.......... 171
AUX port...................................................341
A