2007 Lexus GS450h power steering

414
4-3. Do-it-yourself maintenance
■Passenger’s side instrument panel
FuseAmpereCircuit
1ECU-IG RH10
Electric tilt and telescopic steering,
combination switch, power seat,
smart access system with push-but-
ton start, air conditioning system,
touch screen, shift lock system, tire
pressure warning system, front/rear
stabilizer system
2FR S/HTR RH15Seat heaters, seat heaters and venti-
lators
3RH-IG7. 5
Front right door control system, rear
right door control system, seat belt
pretensioners, transmission, seat
heaters, seat heaters and ventilators
4AM215Starting system
5FR DOOR RH20Front right door control system
6RR DOOR RH20Rear right door control system
7AIR SUS20AV S
8PWR OUTLET15Po w e r o u t l e t
9CIG15Cigarette lighter

5
When trouble arises
429
5-1. Essential information
Towing eyelet
■Emergency towing procedureRelease the parking brake.
Put the shift lever in “N”.
The power switch must be in the “ACC” mode (hybrid system off) or the
“IG-ON” mode (hybrid system on).
CAUTION
■Caution while towing
●Use extreme caution when towing the vehicle. 
Avoid sudden starts or erratic driving maneuvers which place excessive stress on
the emergency towing eyelet and the cable or chain.
●If the hybrid system is not running, the power assist for the brakes and steering
will not function, making steeri ng and braking more difficult.
NOTICE
■To prevent causing serious damage to the transmission
Never tow this vehicle from the front with the rear wheels on the ground. 
This may cause serious dama ge to the transmission.
STEP1
STEP2
STEP3

5
When trouble arises
433
5-1. Essential information
From rearSwitch to “ACC” mode so that the
steering wheel is unlocked.
NOTICE
■To prevent damaging the vehicle
●Do not tow the vehicle with the power switch “OFF”. 
The steering lock mechanism is not st rong enough to hold the front wheel
straight.
●When raising the vehicle, ensure adequate ground clearance for towing at the
opposite end of the raised vehicle. Wi thout adequate clearance, the vehicle
could be damaged while being towed.

5
When trouble arises
439
5-2. Steps to take in an emergency
Have the vehicle inspected by your Lexus dealer immediately.Failing to investigate the cause of the following warnings may lead to the
system operating abnormally and possibly cause an accident. Have the
vehicle inspected by your Lexus dealer immediately.
*1: Electronically Controlled Brake System
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Malfunction indicator lamp
Malfunction in:
• The hybrid system;
• The electronic engine control system;
• The electronic throttle control system; or
• The transmission control system.
SRS warning lightMalfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system.
(U.S.A.)

(Canada)
ABS warning lightMalfunction in:
•The ABS; or
• The brake assist system.
ECB*1/VSC warning light
Malfunction in:
• The electronically controlled brake system; or
• The VSC.
Electric power steering system warning light Malfunction in the EPS.
Pre-collision system warning light (if equipped)Malfunction in the pre-collision system.

5
When trouble arises
459
5-2. Steps to take in an emergency
InteriorbuzzerExterior buzzerWa r n i n g m e s s a g eDetailsCorrection
procedure

An open door has
been closed and
the power switch
has been turned
twice to the
“A C C ” m o d e f r o m
“OFF” mode.
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 indi-
cator will flash
green for 15 sec-
onds.Press the
power
switch again
while turn-
ing the
steering
wheel with
the brake
pedal
depressed.

5
When trouble arises
477
5-2. Steps to take in an emergency
■To prevent 12 volt battery discharge
●Turn off the headlights and the audio system while the hybrid system is off.
●Turn off any unnecessary electrical compon ents when the vehicle is running at a
low speed for an extended period, such as in heavy traffic, etc.
■When the 12 volt battery is removed or discharged
The hybrid system may not start. ( P. 3 8 0 )
Also, the following systems must be initialized.
●Po w e r w i n d o w s (P. 5 1 )
●Variable gear ratio steering (P. 1 5 3 )
●Tire pressure warning system (P. 3 8 5 )
●Intuitive parking assist (P. 1 5 3 )
Maintain the engine speed on th e second vehicle and turn the
power switch to the “IG-ON” mo de, then start the vehicle’s
hybrid system.
Make sure the “READY” light co mes on. If the light does not
come on, contact your Lexus dealer.
Once the vehicle’s hybrid system has started, remove the
jumper cables in the exact reverse order in which they were
connected.
Once the hybrid system starts, have the vehicle checked at your Lexus
dealer as soon as possible.STEP5
STEP6
STEP7

503
6-1. Specifications
6
Vehicle specifications
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excess ive loading, either separately or in
combination, can cause heat build up and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a man-
ufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of transmission, power
steering, power brakes, power windows, power seats,
radio and heater, to the extent that these items are
available as factory-installed equipment (whether
installed or not)
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipped, air conditioning and
additional weight optional engine
Maximum loaded vehicle
weight
The sum of: 
(a) Curb weight 
(b) Accessory weight 
(c) Vehicle capacity weight 
(d) Production options weight
Normal occupant weight150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1
* that follows

520
Alphabetical index
Emergency, in case ofIf a warning light turns on ..............438
If a warning message is 
displayed ............................................ 444
If the hybrid system will not 
start.......................................................... 471
If the shift lever cannot be  shifted from P ....................................472
If the 12 volt battery is 
discharged ....................................... 476
If you have a flat tire .............. 460, 461
If you lose your keys......................... 473
If you think something is 
wrong ................................................... 435
If your vehicle becomes stuck.....483
If your vehicle needs to be 
towed ................................................... 428
If your vehicle overheats ............... 480
When the electronic key battery 
is discharged .................................... 474
Energy monitor............................................ 6
Engine Compartment .....................................369
Hood........................................................366
How to start the hybrid system ... 103
If the hybrid system will not 
start.......................................................... 471
Overheating........................................ 480
Power switch ........................................ 103
Engine compartment cover .............370
Engine coolant temperature 
gauge......................................................... 112
Engine/inverter coolant Capacity .................................................490
Checking ............................................... 376
Preparing and checking before winter ...................................... 176 Engine oil
Capacity ................................................ 489
Checking................................................. 371
Preparing and checking 
before winter...................................... 176
Engine oil maintenance data ........... 374
EPS (Electric Power Steering) .........164
Event data recorder ............................ 436
First-aid kit storage belt ..................... 327
Floor mats ................................................ 326
Fluid Brake ....................................................... 378
Washer................................................... 382
Fog lights Switch ........................................................ 125
Wattage ................................................. 494
Foot light .................................................. 304
Front passenger occupant 
classification system ............................. 77
Front passenger's seat belt 
reminder light ..................................... 440
Front seats Adjustment ...............................................33
Driving position memory ..................35
Front turn signal lights Wattage ................................................. 494
Fuel Capacity ................................................ 488
Fuel gauge ................................................ 112
Gas station information ................. 528
Information ........................................... 495
Refueling ................................................... 55
Messages .............................................. 456
Fuel filler door ........................................... 55
Fuses .......................................................... 403
F