belt lexus LFA 2012 Technical Information / LEXUS 2012 LFA (OM77006U) Workshop Manual

5
When trouble arises
315
5-2. Steps to take in an emergency
Follow the correction procedures.After taking the specified steps to co rrect the suspected problem, check
that the warning light goes off.
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)
*1
Indicates that a door is not
fully closed. Check that both side doors
are closed.
Low fuel level warning light Indicates remaining fuel is
approximately 2.9 gal. (11 L,
2.4 Imp. gal.) or less Refuel the vehicle.
(On the instru- ment cluster) Driver’s seat belt reminder
light (warning buzzer)
*2
Warns the driver to fasten
their seat belt.
Fasten the seat belt.
(On the center panel) Passenger’s seat belt
reminder light
(warning buzzer)
*2
Warns the passenger to fas-
ten their seat belt.
Fasten the seat belt.

316
5-2. Steps to take in an emergency
*1: Open door warning buzzer
P. 3 2 7
*2: Driver’s and passenger’s seat belt reminders buzzer
The driver’s and passenger’s seat belt reminders sound to alert the driver and
passenger that their seat belt is not fa stened. The buzzer sounds intermittently
for 10 seconds after the vehicle has reached a speed of 12 mph (20 km/h).
Then, if the seat belt is still unfastened , the buzzer will sound in a different tone
for 20 more seconds. Tire pressure warning light
When the light comes on:
Low tire inflation pressure
Adjust the tire inflation pres-
sure to the specified level. The
light will turn off after a few
minutes. In case the light does
not turn off even if the tire infla-
tion pressure is adjusted, have
the vehicle checked by your
Lexus dealer.
When the light comes on after
blinking for 1 minute:
Malfunction in the tire pres-
sure warning system Have the system checked by
your Lexus dealer.
Master warning light A buzzer sounds and the
warning light comes on and
flashes to indicate that the
master warning system has
detected a malfunction. 
P. 3 2 2
Warning lightWarning light/DetailsCorrection procedure

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When trouble arises
317
5-2. Steps to take in an emergency
■If the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after taking several driving trips.
If the light does not go off even after several trips, contact your Lexus dealer as soon
as possible.
■Electric power steering system warning light
When the battery is low or when the voltage drops temporarily, the electric power
steering system warnin g light may come on.
■Passenger detection sensor and passenger seat belt reminder
●If luggage is placed on the passenger seat, the passenger detection sensor may
cause the warning light to flash even if a passenger is not sitting in the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Pushing the tire
pressure warning reset switch will not turn off the tire pressure warning light. After
the tire inflation pressure is adjusted, it may take a few minutes for the tire pressure
warning light to go off.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natural
air leaks or tire inflation pressure changes caused by temperature. In this case,
adjusting the tire inflation pressure will turn off the warning light (after a few min-
utes).

318
5-2. Steps to take in an emergency
■If the tire pressure warning system is not functioning
The tire pressure warning system will be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
●If tires not equipped with tire pressure warning valves and transmitters are used
●If the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer
●If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or higher
The tire pressure warning system may be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
●If electronic devices or facilities using similar radio wave frequencies are nearby
●If a radio set at similar frequencies is in use in the vehicle
●If there is a lot of snow or ice on the vehicle, particularly around the wheels or
wheel housings
●If non-genuine Lexus wheels are used (Even if you use Lexus wheels, the tire
pressure warning system may not work properly with some types of tires.)
●If a tire is repaired with the emergency tire puncture repair kit
■If the tire pressure warning light comes on after flashing frequently for 1 minute
If the tire pressure warning light comes on after flashing frequently for 1 minute
when the ignition switch is turned to th e “ON” position, have it checked by your
Lexus dealer.
■Customization that can be configured at Lexus dealer
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features P. 383)

5
When trouble arises
333
5-2. Steps to take in an emergency
Taking out the emergency tire puncture repair kitOpen the rear hatch and remove
the cover.
Release the belt and take out the
tool bag.
Take the emergency tire puncture
repair kit out of the tool bag.
STEP1
STEP2

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When trouble arises
345
5-2. Steps to take in an emergency
If the parking brake cannot be released
In the event that the battery is discharged or switch operation does not
release the parking brake, the parking brake can be released manually using
the procedure below. This procedure should be performed only if necessary,
such as in an emergency.
If the switch cannot be operated even when the battery is normal, the parking
brake system may be malfunctioning. Have the vehicle inspected by your
Lexus dealer immediately.
■ Before releasing the parking brake manually
●Select 1st gear or Reverse.
● Turn the ignition switch to the “LOCK” position.
● Check that the parking brake indicator is off.
● Chock the tires.
Releasing the parking brake manually
Open the rear hatch and remove
the cover.
If the rear hatch cannot be opened
with the rear hatch opener switch,
use the release cable. (P. 2 9 )
Release the belt and take out the
tool bag.
Take the parking brake release tool
and the screwdriver handle out of
the tool bag.
STEP1
STEP2

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When trouble arises
353
5-2. Steps to take in an emergency
CAUTION
■To prevent an accident or injury when inspecting under the hood of your vehicle
●If steam is seen coming from under the hood, do not open the hood until the
steam has subsided. The engine compartm ent may be very hot, causing serious
injury such as burns.
●Keep hands and clothing away from the drive belt while the engine is running.
●Do not loosen the coolant reservoir cap while the engine and radiator are hot.
Serious injury, such as burns, may resu lt from hot coolant and steam released
under pressure.
NOTICE
■When adding engine coolant
Wait until the engine has cooled do wn before adding engine coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot engine too quickly
can cause damage to the engine.

360
6-1. Specifications
Engine
Fuel
Model1LR-GUE
Ty p e10-cylinder V type, 4-cycle, gasoline
Bore and stroke3.50 3.10 in. (88.0  79.0 mm)
Displacement 293.2 cu.in. (4805 cm3)
Drive belt tensionAutomatic adjustment
Fuel typeUnleaded gasoline only
Octane rating91 (Research octane number 96) or higher
Fuel tank capacity
(Reference)19.3 gal. (73 L, 16.1 Imp. gal.)
NOTICE
■Fuel precaution
Do not use any fuel other than that specified above. Doing so may cause engine
damage.

374
6-1. Specifications
Tire section namesBead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer

385
6-2. Customization
6
Vehicle specifications
Illumination
(
P. 2 0 7 )Time elapsed before lights
turn off
15 seconds7. 5 s e c o n d s
30 seconds
Operation when the
doors are unlocked On Off
Operation after the igni-
tion switch is turned to the
“LOCK” position On Off
Seat belt
reminder
(
P. 3 1 5 ) Vehicle speed linked seat
belt reminder buzzer
On
Off
ItemFunctionDefault settingCustomized
setting