2008 LEXUS RX400H key battery

When trouble arises5
377
RX400h_U
5-1. Essential information .... 378If your vehicle needs to be towed ...................................... 378
If you think something is wrong ...................................... 385
Event data recorder.............. 386
5-2. Steps to take in an emergency ................... 388
If a warning light turns on or a warning buzzer
sounds... ................................. 388
If a warning message is displayed................................ 398
If you have a flat tire............... 408
If the hybrid system will not start ................................... 418
If the shift lever cannot be shifted from P ........................ 419
If you lose your keys .............. 420
If the 12-volt battery is discharged ............................. 421
If your vehicle overheats ..... 424
If the vehicle becomes stuck......................................... 427

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.

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

480
Alphabetical index
RX400h_U
Traction control ...................................... 169
Trailer towing........................................... 187
TransmissionTransmission ..........................................135
Trip information display....................... 146
Trip meter ................................................. 138
Turn signal lights Replacing light bulbs........................365
Switch ........................................................136
Wattage.................................................... 441
Valet key...................................................... 34
Vanity lights Vanity lights .......................................... 273
Wattage.................................................... 441
Vanity mirrors ........................................ 273
Vehicle identification number .......... 431
Vehicle stability control....................... 169
Video mode ............................................. 251
VDIM .......................................................... 169
VSC ............................................................. 169
Warning buzzers Brake system ...................................... 388
Key reminder ....................................... 393
Open door ............................................391
Open moon roof reminder ............391
Seat belt reminder...............................391
Warning lights Anti-lock brake system...................389
Automatic headlight leveling system ..................................................389
Brake assist system...........................389
Brake system ...................................... 388
Charging system ...............................389 Electric power steering
control system ................................. 389
Hybrid battery system .................... 389
Low fuel level......................................... 391
Low tire pressure warning light.......................................................... 391
Master warning light.......................... 391
Open door ............................................. 391
Pretensioners ...................................... 389
Seat belt reminder light .................... 391
SRS airbags.......................................... 389
Warning messages
AWD system....................................... 398
Dynamic laser cruise control ..................................... 399, 402
Engine oil maintenance.................. 402
Engine oil pressure........................... 398
Fuel lid..................................................... 407
Head light level................................... 399
Hybrid system..................................... 398
Moon roof............................................. 402
Open door ........................................... 402
Parking brake...................................... 402
Vehicle stability control........399, 401
Washer fluid ........................................ 402
Water temp.......................................... 398
Transmission selector lever ......... 402
Washer
Checking................................................329
Preparing and checking before winter...................................... 182
Switch........................................................ 152
Washing and waxing........................... 298
Weight Cargo capacity .................................... 178
Load limits.................................................181
Weight .................................................... 430
V
W

481
Alphabetical index
RX400h_U
Wheels ......................................................344
Window glasses ....................................... 72
Window lock switch................................ 72
WindowsPower windows ..................................... 72
Rear window defogger .................. 204
Washer ..................................................... 152
Windshield wipers ................................. 152
Wireless remote control key Replacing the battery ...................... 348
Wireless remote control key.......... 36
WMA disc............................................... 220

482
RX400h_U
What to do if...
What to do if...
A tire puncturesP. 4 0 8If you have a flat tire
The hybrid system does not start
P. 4 1 8If the hybrid system will not start
P. 8 3Hybrid vehicle immobilizer system
P. 4 2 1If the 12-volt battery is discharged
The shift lever cannot be
moved outP. 4 1 9If the shift lever cannot be shifted
from P
The engine coolant temperature
gauge enters the red zone
Steam can be seen coming
from under the hood
P. 4 2 4If your vehicle overheats
The key is lostP. 4 2 0If you lose your keys
The 12-volt battery runs outP. 4 2 1If the 12-volt battery is discharged
The doors cannot be lockedP. 3 9Side doors
P. 4 4Back door
The horn begins to soundP. 8 5Alarm
The vehicle is stuck in mud or
sandP. 4 2 7If the vehicle becomes stuck