ECU lexus LFA 2012 Technical Information / LEXUS 2012 LFA (OM77006U) Owner's Guide

296
4-3. Do-it-yourself maintenance
14PMG5 A Electric power control system
15RAD NO.1 10 A Audio system
16MAYDAY 5 A Lexus Enform
17P-S/HTR 15 A Seat heater (passenger's side)
18MIR HTR 15 A Outside rear view mirror defoggers
19P- M PX- B 5 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, wireless remote door lock func-
tion, power seat (passenger’s side)
20GAUGE 10 A Gauges and meters
21ECU-IG2 5 AMultiport fuel injection system/
sequential multiport fuel injection sys-
tem, ASG (Automated Sequential
Gearbox), electric power control sys-
tem, passenger occupant classifica-
tion system, CAN gateway ECU,
Lexus Enform
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
4
Maintenance and care
■ Luggage compartment
FuseAmpereCircuit
1VSSR 5 A Electric power control system
2RR-IG110 AActive rear wing, electric cooling fans,
electronic parking brake, electroni-
cally controlled brake system, seat
belts, navigation system, rear window
defogger, back-up lights
3WASH
20 A Windshield washer
4F/OPN 10 A Fuel filler door opener
5TA I L 1 0 AParking lights, front side marker lights,
rear side marker lights, license plate
lights, stop/tail lights
6RR FOG 7.5 A

7AMP RH 30 A Audio system
8AMP LH 30 A Audio system
9OIL PMP 25 AASG (Automated Sequential Gear-
box)
10RR ECU-B 7.5 AActive rear wing, electronic parking
brake
11ASG-IG2 7.5 AASG (Automated Sequential Gear-
box)

5
When trouble arises
303
5-1. Essential information
If your vehicle needs to be towed
If towing is necessary, we recommend having your vehicle towed and loaded/
unloaded by your Lexus dealer or a commercial towing service, using a flat-
bed truck.
Use a safety chain system for all towing, and abide by all state/provincial and
local laws.
Before towing
The following may indicate a problem with your transmission. Contact
your Lexus dealer before towing.
● The engine is running but the vehicle will not move.
● The vehicle makes an abnormal sound.
Emergency towing
If a flatbed truck is not available, in
an emergency your vehicle may be
temporarily towed using a cable or
chain secured to the emergency
towing eyelet. This should only be
attempted on hard, surfaced roads
for short distances at low speeds.
A driver must be in the vehicle to
steer and operate the brakes. The
vehicle’s wheels, drive train, axles,
steering and brakes must be in
good condition.

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When trouble arises
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5-1. Essential information
Installing the towing eyeletRemove the eyelet cover using a
flathead screwdriver.
To protect the bodywork, place a
rag between the screwdriver and
the vehicle body, as shown in the
illustration.
Insert the towing eyelet into the
hole and tighten securely by hand.
STEP1
STEP2

306
5-1. Essential information
Using a flatbed truckUse a flatbed truck suitable for vehicles with low ground clearance. To
prevent body damage, do not tow with a wheel-lift or sling type truck. We
recommend having your Lexus dealer or a commercial towing service
load and unload the vehicle whenever possible.
■ Before loading the vehicle on a flatbed truck
Deactivate the tilt sensor. ( P. 56)
■ After the vehicle is loaded
Select Neutral, apply the parking brake and turn the ignition
switch to the “LOCK” position.
Use wheel chocks for all 4 wheels to prevent the vehicle from rolling.
Secure the vehicle by strapping
the tires to the deck of the tow
truck as shown.
STEP1
STEP2

5
When trouble arises
307
5-1. Essential information
■Emergency towing procedureStart the engine.
If the engine cannot be started, turn the ignition switch to the “ACC” or
“ON” position.
With Neutral selected, release the parking brake.
■When using the towing eyelet
Use the towing eyelet only when your vehicle is being towed.
Do not use the towing eyelet to tow another vehicle or to tie down your vehicle on a
flatbed truck.
CAUTION
■Caution while towing
●Use extreme caution when towing the vehicle.
Avoid sudden starts or erratic driving maneuvers which place excessive stress on
the emergency towing eyelet and the cable or chain. Always be cautious of the
surroundings and other vehicles while towing.
●If the engine is not running , the power assist for the brakes and steering may not
function, making steering and braking more difficult.
■Installing towing eyelet to the vehicle
Make sure that towing eyelet is installed securely.
If not securely installed, towing eyelet may come loose during towing. This may lead
to accidents that cause serious injury or even death.
NOTICE
■To prevent vehicle damage
Observe the following precautions when using a flatbed truck:
●Do not drive over wheel chocks, as doing so may damage the tires.
●Do not tie down the vehicle over any part s other than the tires (do not use parts
such as the suspension).
STEP1
STEP2

5
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).

5
When trouble arises
337
5-2. Steps to take in an emergency
Attach the sticker as shown.
Remove the injection hose from
the valve and screw the valve core
into the valve securely by turning it
clockwise with the valve core tool.
Connect the air compressor hose
by threading it onto the valve.
Connect the compressor power
plug to the power outlet in the
glove box.
Turn the ignition switch to the “ACC” position.STEP9
STEP10
STEP 11
STEP 12
STEP 13

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When trouble arises
341
5-2. Steps to take in an emergency
CAUTION
■Precaution for children
Keep the emergency tire puncture repair kit out of the reach of children and store it
properly.
■Sealant precautions
●The sealant in the emergency tire puncture repair kit is not for human consump-
tion.
If the sealant is consumed, drink a large quantity of water and get medical atten-
tion immediately.
●If sealant gets in your eyes or on your skin, thoroughly wash with a large quantity
of water. If necessary, get medical attention.
■When fixing the flat tire
●Stop your vehicle in a safe and flat area.
●If force is used to turn the valve core tool while air remains in the tire, special care
should be taken because the valve core could fly out.
●Be careful, as sealant may fly out if you shake the bottle with the hose installed.
●If the hose is not securely installed, sealant may leak out when filling.
●Connect the valve and hose securely with the tire installed on the vehicle.
●Be careful handling the compressor, as parts of the compressor get hot during
operation. Some parts of the compressor may remain hot after use.
●Do not attach the vehicle speed warning sticker to an area other than the one
indicated. If the sticker is attached to an area where an SRS airbag is located,
such as the pad of the steering wheel, it may prevent the SRS airbag from operat-
ing properly.
■Driving to spread the liquid sealant evenly
Drive cautiously at a moderate speed, avoi ding sudden starts, sudden braking, and
abrupt steering maneuvers.

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