headlights Lexus HS250h 2010 Wide View Front Monitor System / LEXUS 2010 HS250H (OM75006U) Owner's Guide

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5-2. Steps to take in an emergency
If the hybrid system will not start
Reasons for the hybrid system not starting vary depending on the situation.
Check the following and perform the appropriate procedure:
■The hybrid system will not start even though the correct starting
procedure is being followed. ( P. 1 4 7 )
One of the following may be the cause of the problem:
● The electr
onic key may not be functioning properly.* (P. 5 3 3 )
● Ther
e may not be sufficient fuel in the vehicle’s tank. 
Refuel the vehicle.
● Ther
e may be a malfunction in the immobilizer system.* (P. 9 6 )
● Ther
e may be a malfunction in the P position control system.* 
( P. 1 5 0 , 502 )
● The hybrid s
ystem may be malfunc tioning due to an electrical
problem such as an open circuit or a blown fuse. However,
depending on the type of malfunc tion, an interim measure is avail-
able to start the hybrid system. ( P. 4 5 5)
*: It may not be possible to shift out of the P position.
■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. 5 3 6 )
● The 12-
volt battery terminal co nnections may be loose or cor-
roded.

5
When trouble arises
531
5-2. Steps to take in an emergency
Emergency start function
When the hybrid system does not start, the following steps can be used as
an interim measure to start the hybrid system if the “POWER” switch is
functioning normally:Set the parking brake.
Turn the “POWER” switch to ACCESSORY mode.
Press and hold the “POWER” swit ch for abou
t 15 seconds while
depressing the brake pedal firmly.
Even if the hybrid system can be started using the above steps, the system
may be malfunctioning. Ha
ve the vehicle inspected by your Lexus dealer.
■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. 5 3 6 )
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.

538
5-2. Steps to take in an emergency
■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 3 4 )
●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 vehi cle cannot be towed without lifting both
front wheels because the front wheels are locked by the parking lock. 
(  P. 4 8 3 )
●When the 12-volt battery is reconnected, start the hybrid system, depress the
brake pedal, and confirm that it is poss ible to shift into each shift position.
Close the exclusive jump starting terminal cover and reinstall
the fuse box cover.
Once the hybrid system starts, have the vehicle inspected at your
L
exus dealer as soon as possible.

556
6-1. Specifications
Light bulbs
A: HB3 halogen bulbs
B: Double end bulbs 
C: Wedge base bulbs (clear) 
D: Wedge base bulbs (amber) 
E: H11 halogen bulbs 
F: Single end bulbs
Light BulbsBulb No.WTy p e
Exterior
LED headlights
High beam
Halogen headlights
High beam
Low beam
9005
9005 H1160
6055A
A E
Front side marker lightsW5W5C
Front turn signal lights3457NA28 /8F
Parking lightsW5W5C
Front fog lightsH1155E
Rear turn signal lightsWY21W21D
Back-up lightsW16W16C
License plate lightsW5W5C
Outer foot lights5C
Interior
Vanity lights8C
Front interior lights/Personal lights8C
Rear interior light8B
Trunk light3.8C
Door courtesy lights5C

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Alphabetical index
Hands-free system 
(for cellular phone)........................... 328
Head restraints Adjustment ................................................71
Headlights aim ....................................... 467
Headlights cleaner .............................. 200
Headlights Adaptive front lighting 
system................................................... 185
Discharge headlights 
precautions .......................................480
Replacing light bulbs ....................... 469
Switch ........................................................183
Wattage ................................................. 556
Heaters Seat heaters.......................................... 375
Side mirrors.......................................... 260
Hill-start assist control ....................... 230
Hood ........................................................... 419
Hooks Grocery bag..........................................381
Horn............................................................. 164
Hybrid system Emergency shut off system ............. 28
Energy monitor/ 
consumption ........................................32
Engine switch ........................................ 147
High voltage components ................ 27
Hybrid system indicators.................165
Ignition switch........................................ 147
Power switch ......................................... 147 I/M test....................................................... 415
Identification
Electric motor ..................................... 549
Engine..................................................... 549
Vehicle ................................................... 548
Ignition switch...........................................147
Illuminated entry system ....................360
Immobilizer system ................................. 96
Indicator lights......................................... 165
Initialization Items to initialize ................................ 584
Inside rear view mirror ........................... 81
Instrument panel light control .......... 163
Interior lights Interior lights ........................................ 360
Switch........................................................ 361
Wattage ................................................. 556
Intuitive parking assist*
Jack Positioning the jack ...........................420
Vehicle-equipped jack .................... 521
Jack handle............................................... 521HI
J
*: Refer to “Navigation System Owner’s Manual”.