5
When trouble arises
549
5-2. Steps to take in an emergency
HS250h_U_75050U
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■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 components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic.
■When the 12-volt battery is discharged
●The hybrid system may not start. (→P. 4 4 8 )
●If the 12-volt battery is depleted with the shift position in P, it will not be possible
to shift out of P. In this case, the vehicle cannot be towed without lifting both
front wheels because the front wheels are locked by the parking lock.
(→ P. 4 9 5 )
●When the 12-volt battery is reconnected, start the hybrid system, depress the
brake pedal, and confirm that it is possible to shift into each shift position.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of certain
electrical appliances. If the vehicle is left for a long time, the 12-volt battery may dis-
charge, and the hybrid system may be unable to start. (The 12-volt battery
recharges automatically while the hybrid system is operating.)
Make sure the “READY” indicator comes on. If the indicator
does not come on, contact your Lexus dealer.
Once the hybrid system has started, remove the jumper cables
in the exact reverse order from which they were connected.
Close the exclusive jump starting terminal cover and reinstall
the fuse box cover.
Once the hybrid system starts, ha ve the vehicle inspected at your
Lexus dealer as soon as possible.
618
Alphabetical index
HS250h_U_75050U
Fuel door ..................................................... 97
Fuel filler door ........................................... 97
Fuses ..........................................................469
Garage door opener ......................... 398
Gas station information......................628
Gauges ...................................................... 169
Glove box ................................................378
Grocery bag hooks .............................396
Hands-free system (for cellular phone) * ........................ 342
Head restraints Adjustment ............................................. 75
Headlights cleaner ..................................211
Headlights Adaptive front lighting system ....................................................193
Discharge headlights precautions ....................................... 492
Replacing light bulbs......................... 481
Switch ......................................................... 191
Wattage................................................. 568
Heaters
Seat heaters ..........................................389
Side mirrors ...........................................274
Hill-start assist control ........................ 243
Hood ..........................................................434
Hooks Grocery bag........................................396
Horn ............................................................ 168
Hybrid system Emergency shut off system ............... 31
Energy monitor/consumption........................................ 35
Engine switch......................................... 152 High voltage components............... 30
Hybrid system indicators ................ 173
Ignition switch ....................................... 152
Power switch ......................................... 152
I/M test ..................................................... 430
Identification Engine ....................................................... 561
Vehicle....................................................560
Ignition switch ..........................................152
Illuminated entry system .................... 376
Immobilizer system................................. 101
Indicator lights ......................................... 173
Initialization
Items to initialize................................. 596
Inside rear view mirror .......................... 85
Instrument panel light control ...........170
Interior lights
Interior lights .........................................374
Switch .......................................................375
Wattage .................................................568
Intuitive parking assist*
Jack
Positioning the jack .......................... 435
Vehicle-equipped jack................... 532
Jack handle ............................................. 532
Keyless entry ............................................. 58
Keys Electronic key ......................................... 42
Engine switch ........................................ 152
If the electronic key does not
operate properly............................ 544
If you lose your keys ........................ 543
Key number.............................................. 42
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