ignition Lexus IS250C 2014 Workshop Manual

5
When trouble arises
533
5-2. Steps to take in an emergency
IS250C/350C_U
■Avoiding a discharged battery
●Turn off the headlights and the audio system while the engine 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, etc.
■Charging the battery
The electricity stored in the battery will discharge gradually even when the vehi-
cle 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 battery may dis-
charge, and the engine may be unable to start. (The battery recharges automat-
ically during driving.)
■When the battery is removed or discharged
Make sure that the key is not inside the vehicle when recharging or replacing the
battery. The key may be locked in the vehicle if the alarm is activated. (→P. 1 0 1 )
Maintain the engine speed of the second vehicle and turn the
“ENGINE START STOP” switch to IGNITION ON mode,
then start the vehicle’s engine.
Once the vehicle’s engine has started, remove the jumper
cables in the exact reverse order in which they were con-
nected.
Once the engine starts, have the vehicle checked at your Lexus dealer
as soon as possible.STEP5
STEP6

560
6-1. Specifications
IS250C/350C_U
Ignition system
Electrical system
Spark plug
Make
GapDENSO FK20HBR11
0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust gap when tuning engine.
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 engine and all the lights are turned
off)
Charging rates5 A max.

613
Alphabetical index
IS250C/350C_U
Electric power steering ....................... 214
Electronic keyIf the electronic key does not operate properly ............................ 528
Emergency, in case of If a warning message is
displayed ........................................... 500
If the electronic key does not
operate properly ............................ 528
If the engine will not start ............... 524
If the retractable hardtop does not close .................................540
If the shift lever cannot be shifted from P ................................... 526
If the vehicle has a discharged battery.................................................. 532
If the warning buzzer sounds........ 491
If the warning light turns on ............ 491
If you have a flat tire ..........................513
If you lose your keys .........................527
If you think something is wrong................................................... 489
If your vehicle becomes stuck .... 539
If your vehicle has to be stopped in an emergency .........550
If your vehicle needs to be
towed ................................................... 483
If your vehicle overheats................ 536
Emergency flashers Switch ...................................................... 482 Engine
Compartment....................................... 416
Engine switch ......................................... 147
Hood ......................................................... 413
How to start the engine ....................147
Identification number ...................... 553
If the engine will not start................524
Ignition switch ........................................ 147
Overheating ........................................ 536
Engine compartment cover .............. 418
Engine coolant Capacity ................................................ 559
Checking ............................................... 423
Preparing and checking
before winter ....................................233
Engine coolant temperature
gauge......................................................... 161
Engine immobilizer system..................98
Engine oil Capacity ................................................ 556
Checking ...............................................420
Preparing and checking
before winter ....................................233
EPS .............................................................. 214
Event data recorder ............................... 22E
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.

615
Alphabetical index
IS250C/350C_U
HeadlightsDischarge headlight
precautions ....................................... 479
Replacing light bulbs .......................468
Switch ........................................................ 176
Wattage .................................................568
Heaters Seat heaters...........................................372
Side mirror .............................................. 251
Hill-start assist control ....................... 220
Hood ........................................................... 413
Hooks
Cargo ...................................................... 375
Shopping bag...................................... 375
Horn............................................................. 160 I/M test......................................................409
Identification
Engine..................................................... 553
Vehicle ................................................... 553
Ignition switch...........................................147
Illuminated entry system ....................354
Indicator lights..........................................167
Initialization Items to initialize ................................ 590
Inside rear view mirror .......................... 78
Interior lights Interior lights .........................................354
Switch...................................................... 355
Wattage ................................................. 568
Jack Positioning a floor jack ......................414
Vehicle-equipped jack .................... 513
Jack handle............................................... 513
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.
I
J

619
Alphabetical index
IS250C/350C_U
Side mirrorAdjusting and folding ..........................79
Mirror position memory ..................... 61
Smart access system with
push-button startEntry function ..........................................32
Starting the engine.............................. 147
“SOS” button ......................................... 388
Spare tire Inflation pressure ................................. 441
Storage location...................................513
Spark plug ............................................... 560
Specifications......................................... 552
Speedometer
Speed indicator ......................................161
Speedometer ..........................................161
Steering wheel Adjustment ...............................................76
Audio switches ...................................300
Steering wheel position
memory ................................................... 61
Storage feature ..................................... 356 Stuck
If your vehicle becomes stuck .... 539
Sun visors .................................................363
Switch All window control switch ................ 82
ECT switch............................................. 152
Emergency flasher switch .............482
Engine switch ......................................... 147
Fog light switch ....................................180
Hazard light switch ...........................482
Ignition switch ........................................ 147
Light switches ........................................176
Power door lock switch .................... 47
Power window switch ........................ 82
Roof switch...............................................86
Satellite switches................................ 366
Transmission shift switches ..................................... 153, 155
VSC off switch ......................................216
Window lock switch............................83
Wiper and washer switch............... 182