lights LEXUS RX400H 2008 Repair Manual

375
4-3. Do-it-yourself maintenance
4
Maintenance and care
RX400h_U
CAUTION
■Replacing light bulbs
●Turn off the headlights. Do not attempt to replace the bulb immediately after turn-
ing off the headlights.
The bulbs become very hot and may cause burns.
●Do not touch the glass portion of the light bulb with bare hands. Hold the bulb by
the plastic or metal portion.
If the bulb is scratched or dropped it may blow out or crack.
●Fully install light bulbs and any parts used to secure them.
Failing to do so may result in heat damage, fire, or water entering the headlight
unit. This may damage the headlights or cause condensation to build up on the
lens.
●Do not attempt to take apart or repair the low beam discharge headlight bulbs,
connectors, power supply circuits, or related components.
Doing so could result in electric shock and serious injury or death.
■Discharge headlights
●Contact your Lexus dealer before replacing discharge headlights (including light
bulbs).
●Do not touch the high-intensity discharge headlight’s high voltage socket when
the headlights are turned on.
An extremely high voltage of 20000 V will be discharged and could result in
serious injury or death by electric shock.
■To prevent damage or fire
Make sure bulbs are fully seated and locked.

388
RX400h_U
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
*: Parking brake engaged warning buzzer:
→P. 4 0 2
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Brake system warning light (warning buzzer)*
•Low brake fluid
• Malfunction in the electronically controlled brake system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released the system is operating normally.
(U.S.A.)

(Canada)Brake system warning lightIndicates a malfunction in the vehicle’s brake system.
Calmly perform the following actions if any of the warning lights turn on or
flash. If a light turns on or flashes, but then turns off, this does not necessar-
ily indicate a malfunction in the system.

418
5-2. Steps to take in an emergency
RX400h_U
If the hybrid system will not start
If the hybrid system will not start, even though correct starting procedures
are being followed (
→P. 131), consider each of the following points.
■The hybrid system will not start even when the starter motor oper-
ates normally.
One of the following may be the cause of the problem.
● There may not be sufficient fuel in the vehicle’s tank.
Refuel your vehicle.
● The hybrid system may be flooded.
Try to restart the hybrid system once more following correct
starting procedures. ( →P. 131)
● There may be a malfunction in the hybrid vehicle immobilizer sys-
tem. (→ P. 8 3 )
■ 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. 4 2 1 )
● 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. 4 2 1 )
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.

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

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

472
RX400h_U
Alphabetical index
Alphabetical index
A/C ............................................................. 198
ABS.............................................................. 169
Adaptive front lighting system ......... 149
AFS .............................................................. 149
Air conditioning filter ..........................346
Air conditioning systemAir conditioning filter ....................... 346
Automatic air conditioning system ................................................... 198
Air bags
Air bag operating conditions ......... 93
Air bag precautions for your child.......................................................... 98
Air bag warning light .......................389
Curtain shield airbag operating conditions.............................................. 94
Curtain shield airbag precautions .......................................... 98
Front passenger occupant classification system....................... 103
General airbag precautions ........... 98
Locations of airbags.............................. 91
Modification and disposal of airbags ...................................................102
Proper driving posture .............89, 98
Side airbag operating conditions.............................................. 94
Side airbag precautions .................... 98
SRS airbags ............................................... 91
Alarm ............................................................85
Antenna ....................................................... 211
Anti-lock brake system ....................... 169
Armrest .....................................................282
Audio system
Antenna ......................................................211 Audio visual input................................ 251
A/V input adapter .............................. 251
CD player/changer ........................... 214
MP3/WMA disc............................... 220
Optimal use ......................................... 228
Radio ........................................................207
Steering wheel audio switch.......... 231
Audio visual input ...................................251
Automatic air conditioning system ..................................................... 198
Automatic headlight leveling system ..................................................... 150
Automatic light control system........ 148
A/V input adapter..................................251
Back door Back door ................................................. 44
Wireless remote control ...................36
Back-up lights Replacing light bulbs ....................... 365
Wattage ................................................... 441
Battery
Checking................................................327
If the 12-volt battery is discharged ......................................... 421
Preparing and checking
before winter...................................... 182
Brake
Fluid.......................................................... 325
Parking brake........................................ 137
Brake assist ...............................................169
Break-in tips..............................................123
Brightness control Multi-display light control .............. 276A
B

474
Alphabetical index
RX400h_U
Do-it-yourself maintenance .............. 310
Door courtesy lightsDoor courtesy lights.........................260
Wattage.................................................... 441
Door lock Back door................................................. 44
Side door .................................................. 39
Wireless remote control................... 36
Door pockets............................................271
Doors Back door................................................. 44
Door glasses ............................................72
Door lock......................................... 36, 39
Power back door ................................. 44
Side door .................................................. 39
Side mirrors ............................................. 68
Driver's seat belt reminder light ...... 391
Driving Break-in tips ........................................... 123
Correct posture .................................... 89
Procedures ............................................. 122
Winter driving tips...............................182
Driving position memory ......................55
DVD player Audio CD/CD text .......................... 248
DVD video ........................................... 239
Initial setting .......................................... 253
MP3 discs ............................................. 249
Video CD.............................................. 246
Electric power steering ....................... 169
Emergency, in case of If the back door opener is in operative................................................ 46
If the hybrid system will not start ................................................ 418 If the shift lever cannot be
shifted from P..................................... 419
If the 12-volt battery is discharged ......................................... 421
If the warning buzzer sounds......388
If the warning light turns on..........388
If you have a flat tire ........................408
If you lose your keys ........................ 420
If you think something is wrong .................................................. 385
If your vehicle becomes stuck ..... 427
If your vehicle needs to be towed ................................................... 378
If your vehicle overheats.................424
Energy monitor ......................................28
Engine
Compartment ....................................... 316
Engine switch .......................................... 131
Hood ......................................................... 313
How to start the hybrid system ...... 131
Identification number ........................ 431
If the hybrid system will not start .................................................418
Ignition switch ......................................... 131
Overheating .........................................424
Engine compartment cover ............... 317
Engine coolant Capacity ................................................ 435
Checking................................................323
Preparing and checking
before winter...................................... 182
Engine coolant temperature
gauge ...................................................... 138
Engine oil
Capacity .................................................434
Checking................................................. 318
E