engine lexus LFA 2012 Technical Information / LEXUS 2012 LFA OWNERS MANUAL (OM77006U)

308
5-1. Essential information
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■Visible symptoms
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature gauge ind icates that the temperature is
higher than normal.
■ Audible symptoms
●Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
■ Operational symptoms
●Engine missing, stumbling or running roughly
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, spon gy feeling, pedal almost touches
the floor

5
When trouble arises
309
5-1. Essential information
Fuel pump shut off system
To minimize the risk of fuel leakage when the engine stalls or when an airbag
inflates upon collision, the fuel pump shut off system stops the supply of fuel to
the engine.
Follow the procedure below to restart the engine after the system is acti-
vated.
Turn the ignition switch to the “ACC” or “LOCK” position.
Restart the engine.
NOTICE
■Before starting the engine
Inspect the ground under the vehicle.
If you find that fuel has leaked onto the ground, the fuel system has been damaged
and is in need of repair. Do not restart the engine.
STEP1
STEP2

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When trouble arises
313
5-2. Steps to take in an emergency
Stop the vehicle immediately.The following warnings indicate the possibility of damage to the vehicle
that may lead to an ac cident. Immediately stop the vehicle in a safe place
and contact your Lexus dealer.
Warning lightWarning light/Details
Charging system warning light Indicates a malfunction in the vehicle’s charging system.
(Flashes) Engine oil temperature warning light (warning buzzer)
Indicates that the engine oil temperature is too high.
(Flashes) Engine coolant temperature warning light (warning
buzzer)
Indicates that the engine coolant temperature is too high.
( P. 3 5 1 )
(Flashes)

314
5-2. Steps to take in an emergency
Have the vehicle inspected by your Lexus dealer immediately.
Failing to investigate the cause of the following warnings may lead to the
system operating abnormally and possibly cause an accident. Have the
vehicle inspected by your Lexus dealer immediately.
Warning lightWarning light/Details
(U.S.A.)
(Canada)
Malfunction indicator lamp Indicates a malfunction in:
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic transmission control system.
SRS warning light Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner system.
(U.S.A.)
(Canada)
ABS warning light Indicates a malfunction in:
•The ABS; or
• The brake assist system.
Brake system warning light Indicates a malfunction in:
• The electronically controlled brake system; or
• The electric parking brake.
Electric power steering system warning light (warning
buzzer) Indicates a malfunction in the EPS system.
(Comes on) Slip indicator
Indicates a malfunction in:
• The VSC system;
•The TRAC system; or
• The hill-start assist control system.

324
5-2. Steps to take in an emergency
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
A buzzer sounds and a warning message is shown on the meter. The fol-
lowing warning indicates a possible problem in the brake system. Imme-
diately stop the vehicle in a safe place and contact your Lexus dealer.
Stop the vehicle immediately.
A buzzer sounds and a warning messa ge is shown on the meter. The fol-
lowing warnings indicate the possibility of damage to the vehicle that may
lead to an accident. Immediately stop the vehicle in a safe place and con-
tact your Lexus dealer.
MessageDetails
(U.S.A.)
(Canada) Indicates the following:
• The brake fluid level is low; or,
• The brake system is malfunctioning.
MessageDetails
Indicates an abnormal engine oil pressure. The warning light may turn on if the engine oil pres-
sure is too low.

5
When trouble arises
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5-2. Steps to take in an emergency
Indicates that the washer
fluid level is low.Add washer fluid.
(
 P. 2 6 4 )
Indicates that engine oil
level is low. Check the level of engine
oil (
P. 132), and add if
necessary ( P. 2 5 7 ) .
Indicates that the engine
oil needs to be changed. Have the engine oil
changed at your Lexus
dealer. (Also have the oil
maintenance function
reset.)
Indicates that the engine
coolant temperature or
engine oil temperature is
below -13 F (-25 C). Start the engine when the
engine coolant or engine
oil temperature reaches
-1 1
F (-24 C) or higher.
Indicates that the battery
voltage is low. Start the engine.
Indicates that the spark
plugs are dirty or carbon
fouled. Drive the vehicle at 2400
rpm or higher for a total
duration of several min-
utes.
MessageDetailsCorrection procedure

332
5-2. Steps to take in an emergency
If you have a flat tire
The LFA is equipped with an emergency tire puncture repair kit, not a spare
tire.
A puncture caused by a nail or screw passing through the tire tread can be
repaired temporarily with the emerge ncy tire puncture repair kit. When
replacing the repaired tire, consult your Lexus dealer or tire dealer.
■Before repairing the tire
●Stop the vehicle in a safe place on a hard, flat surface.
● Set the parking brake.
● Select 1st gear or Reverse.
● Stop the engine.
● Turn on the emergency flashers.
■ Contents
Compressor
Sealant
Injection hose
Extension hose (for extracting
the sealant) Valve core tool
Valve core (spare)
Stickers

5
When trouble arises
343
5-2. Steps to take in an emergency
If the engine will not start
If the engine will not start, even though correct starting procedures are being
followed (
P. 98), consider each of the following points.
■ The engine will not start even when the starter motor operates nor-
mally.
One of the following may be the cause of the problem.
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● The engine may be flooded.
Try to restart the engine once more following correct starting pro-
cedures. ( P. 9 8 )
● There may be a malfunction in the engine immobilizer system.
( P. 5 3 )
■ The starter motor turns over slowly , 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 battery may be discharged. ( P. 3 4 8 )
● The battery terminal connections may be loose or corroded.
■ The starter motor does not turn over, the interior lights and head-
lights 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 battery terminals may be disconnected.
● The battery may be discharged. ( P. 3 4 8 )
Contact your Lexus dealer if the prob lem cannot be repaired, or if repair
procedures are unknown.

348
5-2. Steps to take in an emergency
If the vehicle battery is discharged
The following procedures may be used to start the engine if the vehicle’s bat-
tery is discharged.
You can call your Lexus dealer, or qualified repair shop.
If you have a set of ju mper (or booster) cables and a second vehicle with a
12-volt battery, you can jump start yo ur Lexus following the steps below.
Open the rear hatch and remove
the battery cover.
If the rear hatch cannot be opened
with the rear hatch opener switch,
use the release cable. ( P. 2 9 )
After removing the positive (+)
battery terminal cover and check-
ing that the negative (-) terminal is
securely fixed in place, connect the
jumper cables in the following
order:
Positive (+) battery terminal on
your vehicle
Positive (+) battery terminal on
the second vehicle
Negative (-) battery terminal on
the second vehicle
Negative (-) battery terminal on
your vehicle
STEP1
STEP2

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When trouble arises
349
5-2. Steps to take in an emergency
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that level for approximately 5 minutes to
recharge the battery of your vehicle.
Maintain the engine speed of th e second vehicle and start the
engine of your vehicle.
Once the vehicle’s engine has started, remove the jumper cables
in the exact reverse order from which they were connected.
After disconnecting the jumper cables, make sure that the negative (-)
battery terminal on your vehicle is fixed securely.
Once the engine starts, have the vehicle inspected at your Lexus dealer
as soon as possible.
■Starting the engine when the battery is discharged
●If the gear indicator is not displayed when an attempt is made to start the
engine, the engine is not yet ready to start. Depress the brake pedal for several
seconds and wait for the ge ar indicator to appear.
●The engine cannot be started by push-starting.
■To prevent battery discharge
●Turn off the headlights and the audio system while the engine is off.
●Turn off any unnecessary electrical compon ents when the vehicle is running at a
low speed for an extended period, such as in heavy traffic.
STEP3
STEP4
STEP5