2008 LEXUS RX400H light

422
5-2. Steps to take in an emergency
RX400h_U
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■Avoiding a discharged battery
●Turn off the headlights and the audio system while the hybrid system is turned off.
●Turn off any unnecessary electrical components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic, etc.
■After recharging the 12-volt battery
(→ P. 3 2 8 )
■When the battery is removed or discharged
The power windows, power back door and moon roof must be initialized.
(→ P. 4 6 2 )
CAUTION
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flammable
gas that may be emitted from the battery.
●Make sure the jumper cable is connected to the correct terminal and that it is not
unintentionally in contact with any part other than the intended terminal.
●Do not allow the jumper cables to come into contact with the “+” and “-” termi-
nals.
●Do not allow open flame or use matches, cigarette lighters or smoke near the
battery.
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

436
6-1. Specifications
RX400h_U
Electrical system
12-volt battery
Open voltage at
68°F (20 °C):12.6  12.8 V Fully charged
12.2 
12.4 V Half charged
11.8 
12.0 V Discharged
(Voltage checked 20 minutes after the
key is removed from the engine switch
with all the lights turned off)
Charging rates5 A max.

441
6-1. Specifications
6
Vehicle specifications
RX400h_U
Light bulbs
A: D2S discharge bulbs
B: H11 halogen bulbs
C: Wedge base bulbs (amber)
D: HB3 halogen bulbs
E: Wedge base bulbs (clear)
F: Double end bulbs
G: Single end bulbs
Light BulbsBulb No.WTy p e
Exterior
Headlights (low beam)Discharge bulbs
Halogen bulbs

35
55A
B
Front turn signal lights21C
Headlights (high beam)900560D
Parking lights1685E
Fog lights900655B
Front side marker lights1685E
Rear turn signal lights21C
Licence plate lights1685E
Back-up lights92116E
Rear side marker lights1943.8E
Interior
Vanity lights2.8G
Pe r s o n a l l i g h t s8G
Interior lights8F
Luggage compartment lights5F
Door courtesy lights5G

442
6-1. Specifications
RX400h_U
Fuel information
■Fuel tank opening for unleaded gasoline
To help prevent incorrect fueling, your Lexus has a fuel tank opening that only
accommodates the special nozzle on unleaded fuel pumps.
■If premium gasoline is not available
If 91 rating gasoline cannot be obtained, you may use unleaded gasoline with an
octane rating as low as 87 (Research Octane Rating 91).
■If your engine knocks
●Consult your Lexus dealer.
●You may occasionally notice light knocking for a short time while accelerating or
driving uphill. This is normal and there is no need for concern.
■Gasoline quality
In very few cases, driveability problems may be caused by the brand of gasoline you
are using. If driveability problems persist, try changing the brand of gasoline. If this
does not correct the problem, consult your Lexus dealer.
Your vehicle must use only unleaded gasoline.
Premium unleaded gasoline with an octane rating of 91 (Research Octane
Number 96) or higher required for optimum engine performance.
At minimum, the gasoline you use should meet the specifications of
ASTM D4814 in the U.S.A. and CGSB3.5-M93 in Canada.

454
6-1. Specifications
RX400h_U
Tire related termMeaning
Intended outboard side-
wall
(a) The sidewall that contains a whitewall, bears
white lettering, or bears manufacturer, brand,
and/or model name molding that is higher or
deeper than the same molding on the other side-
wall of the tire, or
(b) The outward facing sidewall of an asymmetrical tire that has a particular side that must always
face outward when mounted on a vehicle
Light truck (LT) tire
A tire designated by its manufacturer as primarily
intended for use on lightweight trucks or multipur-
pose passenger vehicles
Load ratingThe maximum load that a tire is rated to carry for a
given inflation pressure
Maximum load ratingThe load rating for a tire at the maximum permissible
inflation pressure for that tire
Maximum permissible
inflation pressureThe maximum cold inflation pressure to which a tire
may be inflated
Measuring rimThe rim on which a tire is fitted for physical dimension
requirements
Open spliceAny parting at any junction of tread, sidewall, or
innerliner that extends to cord material
Outer diameterThe overall diameter of an inflated new tire
Overall width
The linear distance between the exteriors of the side-
walls of an inflated tire, including elevations due to
labeling, decorations, or protective bands or ribs
Passenger car tire
A tire intended for use on passenger cars, multipur-
pose passenger vehicles, and trucks, that have a
gross vehicle weight rating (GVWR) of 10,000 lb. or
less.
PlyA layer of rubber-coated parallel cords

460
6-2. Customization
RX400h_U
ItemFunctionDefault settingCustomizedsetting
Door lock
(
→P. 3 9 )
Unlocking using a key
Driver's door
unlocked in
one step, all
doors
unlocked in
two steps
All doors
unlocked in one step
Speed-detecting auto-
matic door lock functionOFFON
Opening driver's door
unlocks all doorsOFFON
Shifting gears to P
unlocks all doorsONOFF
Shifting gears to position
other than P locks all
doors
ONOFF
Pow e r
windows
(
→P. 7 2 )
Linked door lock/unlock
operationONOFF
Wireless remote control
linked operationON
(open only)OFF
Moon roof
(
→P. 7 5 )
Linked door lock/unlock
operationONOFF
Wireless remote control
linked operationON
(open only)OFF
Automatic
light control
system
(
→P. 1 4 8 )
Light sensor sensitivityLevel 3Level 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 second
60 seconds
90 seconds

461
6-2. Customization
6
Vehicle specifications
RX400h_U
Windshield
wipers and
washer
(
→P. 1 5 2 )
Switching operation when
the vehicle is stationaryONOFF
Illumination
(
→P. 2 6 0 )
Time elapsed before lights
turn off15 seconds7. 5 s e c o n d s
30 seconds
Front footwell lightingONOFF
Inside door handle well
lightingONOFF
Operation when the
doors are unlockedONOFF
Operation after the
hybrid system is offONOFF
Steering
wheel
(
→P. 66)
Automatic tilt-away steer-
ing columnONOFF
ItemFunctionDefault settingCustomizedsetting

470
RX400h_U
Abbreviation list
Abbreviation/Acronym list
ABBREVIATIONSMEANING
A/CAir Conditioning
ABSAnti-Lock Brake System
ACCAccessory
AFSAdaptive Front-lighting System
ALRAutomatic Locking Retractor
AW DAll-Wheel Drive
CRSChild Restraint System
DISPDisplay
ECUElectronic Control Unit
EDREvent Data Recorder
ELREmergency Locking Retractor
EPSElectric Power Steering
GAWRGross Axle Weight Ratings
GVWRGross Vehicle Weight Ratings
I/MEmission inspection and Maintenance
INFOInformation
INTIntermittent
LEDLight Emitting Diode
LTLight Truck
MMTMethylcyclopentadienyl Manganese Tricarbonyl
M + SMud and Snow
MTBEMethyl Tertiary Butyl Ether
OBDOn Board Diagnostics
PWRPow e r
SRSSupplemental Restraint System