ignition AUDI TT COUPE 2014 Repair Manual

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system
Description of airbag
system
General notes on airbag system
The airbag is an integral part of the car's passive
safety system.
In conjunction with the seat belts, the airbag sys­
tem gives the front occupants additional protec­
tion for the head and chest in the event of a se­
vere frontal collision.
In a side collision the side airbags reduce the risk
of injury to the areas of the body facing the im­
pact ¢_&.
In addition to their normal function of protecting
the occupants in a collision, the seat belts also
hold them in a position where the airbags can in­
flate properly and provide maximum protection.
The airbag system will only work with the igni­
tion on. The airbag system is monitored electron­
ically; the airbag warning lamp indicates whether
the system is functioning properly.
The main parts of the airbag system are:
- The electronic monitoring system (control unit
and sensors)
- The two front airbags
- The two side airbags
- The warning lamp El in the instrument cluster
There is a fault in the airbag system if the
warning lamp
- does not come on when the ignition is switched
on.
- does not go out about 4 seconds after the igni­
tion is switched on.
- goes out and then comes on again after the ig­
nition is switched on.
- comes on or flickers while the car is moving.
A WARNING
- The airbags are not a substitute for the seat
belts; they are an integral part of the car's
overall passive safety system. The airbags
can only offer effective protection if the oc- Airbag system
cupants are wearing their seat belts. For
this reason it is very important to wear the
seat belts at all times ¢ page 204, Why is it
so important to use seat belts?.
- The seat belts and airbags can only provide
maximum protection if the occupants are
seated correctly ¢ page 46, Seats and stor­
age.
- If you do not wear a seat belt, if you lean
for ward, or are not seated correctly while
the vehicle is in motion, you are at greater
risk of injury should the airbag system be
triggered in an accident.
- Components of the airbag system are loca­
ted in various parts of the vehicle. If repairs
to other vehicle components make it neces­
sary to perform work on the airbag system
or to remove or install parts of the airbag
system, this may cause damage to the air­
bag system. As a result, the airbags may not
inflate correctly or may not be triggered at
all in an accident situation. For this reason,
you should always have the work carried out
by a qualified workshop.
- If a fault should occur in the airbag system,
have the system checked immediately by a
qualified workshop. Otherwise the system
may fail to trigger in an accident.
- Do not attempt to modify components of
the airbag system in any way.
- Never make any alterations to the front
bumper or the body.
- Do not remove the front seats.
- The airbag system can only be activated
once; if the airbag has been triggered, the
system must be replaced. Should the airbag
system or airbag modules have to be re­
placed, the qualified workshop carrying out
the replacement will document all details.
- If you sell the vehicle, remember to pass on
the complete Service Wallet to the new
owner. If any of the airbags have been deac­
tivated, it is important that the new owner
is also given the relevant documents.
- The relevant safety requirements must be
observed when the vehicle or components
of the airbag or belt tensioner systems are
scrapped.
209

Downloaded from www.Manualslib.com manuals search engine Deactivating
the front passenger's airbag
Applies to vehicles: with key-operated switch for front pas­
senger's airbag
If an airbag has been deactivated, it should be
reactivated as soon as possible so that it can
continue to give the required protection.
Fig. 194 Glove box: Key-operated switch for deactivating
front passenger's airbag
Fig. 195 Headliner: Warning lamp lights up when pas­
senger's airbag is deactivated
... To deactivate the front passenger's airbag, use
the key to turn the key-operated switch to@
(OFF) ¢ Fig. 194 .
... The front passenger's airbag can be reactivated
by turning the key to position (D (ON).
Deactivating front passenger's airbag when a
child seat is in use
If you have no alternative but to install a rear­
ward-facing child seat on the front passenger's
seat you must deactivate the front passenger's
airbag beforehand.
Monitoring of airbag system
The indicator lamp JJI ¢ page 14 will light up for
"' a few seconds every time the ignition is switched
� on.
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system
If the front passenger's airbag has been deactiva­
ted, the indicator lamp "PASSENGER AIR BAG
OFF "or" AIR BAG OFF" will light up con­
stantly as a reminder ¢Fig. 195.
When the front passenger's airbag is deactivated,
the seat belt warning lamp for the front passen­
ger. ¢ page 13 is also switched off.
A WARNING
- If you have no alternative but to install a
rearw ard-facing child seat on the front pas­
senger's seat, the front passenger's airbag
must be deactivated beforehand. Potentially
fatal injuries to the child can result if the
front passenger's airbag is not deactivated
¢page 195!
- If you have deactivated the front passeng­
er's airbag, reactivate it as soon as the child
seat is no longer needed so that the airbag
can continue to give the required protection.
- It is the driver's responsibility to ensure that
the key-operated switch is set to the correct
position.
((J) Note
All the
other
airbags in the car will remain
functional if the front passenger's airbag has
been deactivated with the key-operated
switch .
211

Downloaded from www.Manualslib.com manuals search engine Checking
and topping up
fluids
Fuel Petrol grade
Applies to vehicles: with petrol engine
The correct grade of petrol is listed inside the
fuel tank flap.
The vehicle is equipped with a catalytic converter
and must only be run on unleaded petrol. The
petrol must comply with the EN 228 or DIN
51626-1 standard and must be sulphur-free. You
can fuel your vehicle with fuels containing a max­
imum of 10% ethanol (ElO). The petrol grades
have different octane ratings (RON).
The following headings relate to the sticker on
the inside of your vehicle's tank flap:
Unleaded fuel only RON/ROZ 95 Super,
Premium or min. RON/ROZ 91 Normal
The use of premium petrol (95 RON) is recom­
mended. If that type of fuel is not available, reg­
ular petrol (RON 91) can be used with a slight
loss of power.
Unleaded fuel only, min. RON/ROZ 95 Super,
Premium
Premium petrol (at least 95 RON) must be used.
If premium petrol is not available, the engine can
be run on regular petrol with 91 RON as an emer­
gency measure. In this case only use moderate
engine speeds and a light throttle. Fill up with
premium or Super Plus petrol as soon as possi­
ble.
Unleaded fuel only RON/ROZ 98 Super Plus
or min. RON/ROZ 95 Super, Premium
The use of Super Plus petrol (98 RON) is recom­
mended. If that type of fuel is not available, pre­
mium petrol (RON 95) can be used with a slight
loss of power.
If premium petrol is not available, the engine can
� be
run on regular petrol with 91 RON as an emer-
>
� gency
measure. In this case only use moderate
� engine
speeds and a light throttle. Fill up with
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and topping up fluids
premium or Super Plus petrol as soon as possi­
ble.
CD CAUTION
- Do NOT fuel your vehicle with high-ethanol
fuel blends (e.g. ESQ or E85). This will dam­
age the fuel system.
- Just one tank of leaded fuel or fuel with
metallic additives will permanently impair
the efficiency of the catalytic converter.
- You should use only petrol additives which
have been approved by Audi. Additives with
so-called octane boosters or antiknock addi­
tives can contain metallic additives that
cause significant damage to the engine and
the catalytic converter. Do not use such ad­
ditives.
- Metal-based fuels, which can be identified
from the marking on the fuel dispenser,
must not be used. LRP fuel (lead replace­
ment petrol) also contains high concentra­
tions of metallic additive. Risk of engine
damage!
- High engine speed and full throttle can
damage the engine when using petrol with
an octane rating lower than the correct
grade for the engine.
«'.D Note
- You can use higher octane fuel than your en­
gine requires.
- In countries where sulphur-free fuel is not
available, you may use low-sulphur fuel in­
stead.
Diesel fuel
Applies to vehicles: with diesel engine
Please note the information on the inside of the
fuel tank flap.
The use of sulphur-free diesel to EN 590 is rec­
ommended. If that type of fuel is unavailable,
diesel to EN 590 can be used. It must have ace­
tane number (CN) of at least 51. The cetane
number indicates the ignition quality of the die-
sel fuel.
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If the spare fuel canister is made of metal,
the filler nozzle must be in contact with
the canister during filling. This helps pre­
vent an electrostatic charge building up.
- Make sure you never spill fuel in the vehi­
cle or in the Luggage compartment. Fuel
vapour is explosive -danger to Life!
CD CAUTION
- Remove any fuel spills from the paintwork
immediately.
- Never run the tank completely dry. If there
is an irregular fuel supply, misfiring can oc­
cur. As a result unburnt fuel can enter the
exhaust system and cause damage to the
cata Lytic converter(s).
- When filling the fuel tank after having run it
completely dry on a vehicle with a diesel en­
gine the ignition must be switched on for at
Least 30 seconds without starting the en­
gine. When you then start the engine it may
take Longer than normal (up to one minute)
for the engine to start firing. This is because
air needs to be bled from the fuel system
while starting.
(® For the sake of the environment
Do not overfill the fuel tank -this may cause
the fuel to overflow if it becomes warm.
(1j) Note
Should the fuel tank flap become frozen stuck
during inclement weather, press the middle
of the flap with the palm of the hand and try
again.
@ Note
To prevent the tank from being filled with the
incorrect type of fuel (petrol or diesel), only
suitable filler nozzles can be inserted in the
fuel filler on your vehicle.
- If the filler nozzle is old, damaged or too
small, it may not be able to open the pro­
tection mechanism on the fuel tank. In this
case, try turning the filler nozzle before in­
serting it in the fuel filler neck, use a differ- Checking
and topping up fluids
ent filling pump or seek professional assis­
tance.
- The protection mechanism will not open if
you try to add fuel from a spare fuel canis­
ter. If you need to fill the tank from a spare
fuel canister, you must use the special fun­
nel stowed in the Luggage compartment
¢page 219, Fig. 206.
Filling the tank using a spare fuel canister
Fig. 206 Luggage compartment: Funnel
Fig. 207 Funnel inserted in tank opening
Please refer to the important safety notes¢ A
in Procedure for filling the tank on page 218.
... Press the tank flap -arrow- ¢page 218,
Fig. 204 to open it. .....
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... Take the funnel out from underneath the floor
panel in the Luggage compartment.
... Insert the funnel into the fuel filler neck as far
as the stop ¢ Fig. 207. The funnel should be in­
serted so far into the fuel filler neck that the
ring on the funnel is not visible.
... Insert the filler of the spare fuel canister into
the funnel and start fuelling.
... After fuelling, remove the funnel and close the
fuel tank flap so that it Locks in place.
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and topping up fluids
CD CAUTION
Remove any fuel spills from the paintwork im­
mediately.
Releasing the tank flap manually
The tank flap can be released manually if the
tank unlocking system should fail to operate.
Fig. 208 Luggage compartment: Cover in the right side
trim
.. Open the boot lid.
.. Lift the floor panel.
.. Release the ring from its holder and carefully
pull the ring ¢ Fig. 208.
Em ission control
systems
Catalytic converter
Applies to vehicles with petrol engine: The vehi­
cle must only be used with unleaded petrol; oth­
erwise the catalytic converter will be irreparably
damaged.
Never allow the fuel tank to run completely dry,
as the irregular supply of fuel can cause misfir­
ing. This allows unburnt fuel to enter the exhaust
system, which can cause overheating and dam­
age to the catalytic converter.
Diesel particulate filter
Applies to vehicles with diesel engine: The die­
sel particulate filter can filter out almost all soot
particles contained in the exhaust gas. In normal
driving conditions the filter is self-cleaning.
Should the self-cleaning function of the filter not
be able to operate, e.g. when the vehicle is con­
tinuously used only for short trips, the filter be-
220 comes
obstructed with soot and the symbol Cl
for the diesel particulate filter lights up
¢page 15.
A WARNING
The exhaust system is very hot when the vehi­
cle is being driven and after the engine has
been switched off.
- Never touch the tailpipes when they are hot
- risk of burns!
- Because of the high temperatures which can
occur in the emission control system (cata­
lytic converter or diesel particulate filter),
do not park the vehicle where the exhaust
can come into contact with flammable ma­
terials under the car (e.g. on grass or at the
forest edge) -risk of fire!
- Do not apply any undersea[ agents in the
area around the exhaust system -risk of
fire!
Engine compartment
Working on components in the engine
compartment
Extra caution is necessary when working on com­
ponents in the engine compartment.
Always be aware of the danger of injury and
scalding as well as the risk of accident or fire
when working in the engine compartment (e.g.
when checking and refilling fluids). Always ob­
serve the warnings listed below and follow all
normal safety precautions. The engine compart­
ment of any motor vehicle is a potentially haz­
ardous area ¢ .,&.
A WARNING
- Switch off the engine.
- Switch off the ignition.
- Apply the parking brake.
- Pu t the gear lever in neutral or selector in P.
- Wait for the engine to cool down.
- Keep children away from engine compart-
ment.

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Never spill fluids on a hot engine. These flu­
ids can cause a fire (e.g. radiator anti­
freeze).
- Take care not to cause short circuits in the
electrical system, especially when working
on the battery.
- When working in the engine compartment
be aware that the radiator fan may start
running suddenly, even if the ignition is
switched off-risk of injury!
- Do not unscrew the cap on the expansion
tank when the engine is hot. The cooling
system is under pressure.
- Protect face, hands and arms by covering
the cap with a large, thick rag to protect
against escaping coolant and steam.
- Never remove the engine cover panel -risk
of burns!
- If any tests have to be performed with the
engine running, there is an extra safety risk
from the rotating parts, such as the drive
belts, alternator and radiator fan, etc., and
from the high-voltage ignition system.
- Vehicles with automatic gearbox: Never
open the throttle inadvertently (for instance
by hand from the engine compartment) if a
gear is engaged while the vehicle is station­
ary with the engine running. The vehicle
could otherwise start moving immediately
and possibly cause an accident.
- Observe the following additional warnings if
work on the fuel system or the electrical
system is necessary:
- Always disconnect the battery.
- Do not smoke.
- Never work near naked flames.
- Always keep an approved fire extinguisher
immediately available.
CD CAUTION
When topping up fluids make sure the correct
fluid is put into the correct filler opening. This
can otherwise cause serious malfunctions or
engine damage. Checking
and topping up fluids
® For the sake of the environment
Inspect the ground underneath your vehicle
regularly so that any leaks are detected at an
early stage. If you find spots of oil or other
fluids, have your vehicle inspected in the
workshop.
{D) Note
On right-hand drive vehicles* some of the
containers/ reservoirs mentioned below are
located on the other side of the engine com­
partment.
Opening the bonnet
The bonnet is released from inside the vehicle.
Fig. 209 Footwell on driver's side: Release lever
Fig. 210 Unlocked bonnet: Lever
The wiper arms should be resting on the wind­
screen: make sure they are not in a raised posi­
tion. Otherwise the paint may get damaged.
� With the driver's door open, pull the lever un­
der the dashboard in the direction indicated (ar­
row) ¢ Fig. 209.
� Lift the bonnet slightly¢.&_.
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positions of the engine oil dipstick and en­
gine oil filler cap ¢Fig. 211 (items @and @)
may be different on some engine versions.
Engine oil
Choosing the correct engine oil grade
The service interval display in the instrument
cluster of your vehicle will inform you when it is
time for an oil change. We recommend having
the oil changed by a qualified workshop.
If you have to top up the oil between oil changes,
use the grades of oil specified in the table in ac­
cordance with VW standards. You will need to
know whether
- the vehicle is being serviced based on the flexi­
ble or fixed oil change service (see Last service
record in Service Schedule).
- the vehicle has a petrol or diesel engine (see
sticker on inside of fuel tank flap).
- a diesel particulate filter is fitted on the vehicle
(see Delivery Inspection section of Service
Schedule).
Oil Change Serv-
Oil Change Serv-
ice (flexible)
ice (fixed)
Petrol VW50400 vw
502 00
engine Alternatively:
vw 504 ooa)
Diesel VW50700 With
diesel par-
engine ticulate
filter:
VW 507 00
Without diesel
particulate filter:
vw 505 01
Alternatively: vw 507 oob
>
al When using fuel complying with EN 228 or DIN 51626-1
b) When using fuel complying with EN 590 or DIN 51628
CD} Note
If the oil grades specified in the table are not
available, you can use one of the following
....
� grades
as a substitute. To prevent damage to
� the
engine, this should not be done more
.... Checking
and topping up fluids
than once between oil changes and no more
than 0.5 Litres should be used.
- Petrol engines: ACEA A3 or API SN (API SM)
standard
- Diesel engines: ACEA C3 or API CJ-4 stand­
ard
(©) Note
- For China: Only oil complying with VW
standard 502 00 with viscosity SAE 5W-40
may be used on vehicles with a petrol en-
gine.
- The flexible oil change service is not availa­
ble in all countries.
Checking the engine oil level
Fig. 212 Guide for oil dipstick
Checking oil level
.,. Park your vehicle on a Level surface.
.,. Allow the warm engine to run briefly at idling
speed and then switch off the ignition.
.,. Wait approx. two minutes.
.,. Pull out the dipstick. Wipe the dipstick with a
clean cloth and insert it again, pushing it in as
far as it will go.
.,. Then pull the dipstick out again and check the
oil level ¢ Fig. 212. If the oi L Level is too Low,
add more engine oil¢ page 224.
Oil level in area 0
.,. Do not top up oil.
Oil level in area @
.,. Oil can be topped up. After topping up the oil (£)
(£)
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(Il
Level should be in area 0·
..,
223

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.... Coolant
addi-Frost protec-
tive tion
Countries with min. 40 %,
min. -25 °C
warm climate max. 45 %
Countries with min.
50 %,
max. -40 °C
cold climate max.
60 %
CD CAUTION
- Have your qualified workshop check the
cooling system before the winter season to
make sure that the anti-freeze concentra­
tion is adequate for the conditions to be ex­
pected. This applies particularly if you drive
into a colder climate zone.
- To prevent damage to the engine, do not
use a different type of anti-freeze additive if
the approved type of additive is not availa­
ble. In this case use only water and bring
the coolant concentration back up to the
correct level as soon as possible by putting
in the specified additive.
- Always top up with fresh, unused coolant.
- Radiator sealants must not be added to the
coolant.
Topping up coolant
Fig. 214 Engine compartment: Cap of coolant expansion
tank
Checking coolant level
.. Park
your vehicle on a level surface .
.. Switch off the ignition .
.. Read off the coolant level on the coolant expan­
sion tank ¢ page 222, Fig. 211. When the en­
gine is cold, the coolant level should be be­
tween the marks. When the engine is warm, it
may be slightly above the top mark. Checking
and topping up fluids
Topping up coolant
Impor tant: The coolant expansion tank must not
be empty ¢(D.
.. Wait for the engine to cool down.
.. Cover the cap on the expansion tank with a
cloth, and carefully unscrew the cap anti-clock­
wise ¢ .&_ .
.. Add coolant in the correct concentration
¢ page 224 up to the top mark.
.. You should make sure that the fluid level re-
mains stable. If necessary, add more coolant.
.. Screw the cap on again tightly.
Any loss of coolant normally indicates a leak in
the cooling system. Drive to a qualified workshop
without delay and have the cooling system
checked. If there are no leaks in the system, a
loss of coolant can only occur if the coolant boils
and is forced out of the system as a result of
overheating.
A WARNING
- The cooling system is under pressure. Do
not unscrew the cap on the expansion tank
when the engine is hot: you could be scal­
ded by escaping steam.
- The coolant and coolant additive can be a
health hazard. Store the coolant additive in
the original container in a safe place out of
reach of children -risk of poisoning.
- When working in the engine compartment
be aware that the radiator fan may start
running suddenly, even if the ignition is
switched off-risk of injury!
CD CAUTION
Do not add coolant if the expansion tank is
empty. Air could have got into the cooling sys­
tem -risk of engine damage! In this case, do
NOT drive on. Obtain professional assistance .
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and topping up fluids
Brake fluid
&
8cm DOT 4 0
0
Fig. 215 Engine compartment: Cap of brake fluid reservoir
Checking brake fluid level
The brake fluid Level must be between the MIN
and MAX marks on the reservoir ¢ page 222,
Fig. 211.
If the Level goes down noticeably in a short time,
or drops below the MIN mark, there may be a
Leak in the brake system. Obtain professional as­
sistance. The brake fluid Level is also monitored
via a warning Lamp on the infotainment display
¢page 11.
In right-hand drive vehicles the brake fluid reser­
voir is on the other side of the engine compart­
ment.
Changing brake fluid
Your vehicle's Service Schedule will tell you the
regular intervals at which the brake fluid is due
for renewal. We recommend that you have the
brake fluid changed by a qualified workshop dur­
ing a service.
A WARNING
- Brake fluid is poisonous; it must be stored in
the sealed original container in a safe place
out of the reach of children.
- Heavy use of the brakes may cause a vapour
Lock if the brake fluid is left in the system
for too Long. This would seriously affect the
efficiency of the brakes and the safety of the
car -risk of accident!
226 CD
CAUTION
Brake fluid must not be allowed to come into
contact with the vehicle's body, otherwise it
will attack the paintwork.
Battery General notes
ALL work on batteries requires specialist knowl­
edge.
The battery is virtually maintenance-free. It is
checked as part of the Inspection Service.
When an airbag is triggered, the battery will, un­
der certain circumstances, be disconnected from
the on-board power supply for safety reasons
¢ .&.. in General notes on airbag system on
page 209.
Disconnecting the battery
The battery should always be Left connected. If
the battery is disconnected, some of the vehicle's
functions will become inoperative (e.g. electric
windows). These functions will require resetting
after the battery is reconnected. For this reason,
the battery should only be disconnected from the
vehicle's electrical system when absolutely nec­
essary.
If the vehi cle is not used for long periods
If you do not drive your vehicle for a period of
several days or weeks, the power management
will gradually shut off the on-board systems one
by one, or reduce the amount of current they are
using. This Limits the amount of power consumed
and helps to ensure reliable starting even after a
Long period ¢ page 106. Certain convenience fea­
tures, such as interior Lighting or electric seat ad­
justment, may not be available. These functions
will be restored when you switch on the ignition
and start the engine. Even though some systems
are deactivated automatically, certain electrical
equipment continues to draw current even when
the ignition is off. If the vehicle is Left standing
for several months, this can result in total bat-
tery discharge. If the battery is allowed to dis­
charge completely, an internal chemical reaction
..,_

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the battery. To avoid this, the battery
should be recharged at least once a month
¢ page 228. Do not disconnect the battery; oth­
erwise the anti-theft alarm system* will be out of
operation.
Winter conditions The battery is drained more in cold weather,
which means that the starting power is reduced.
For this reason, have the battery checked and
charged if necessary before the start of winter.
A WARNING
-
-All work on batteries requires specialist
knowledge. For queries regarding the vehi­
cle battery please seek the assistance of a
qualified workshop -risk of chemical
burns / risk of explosion!
- The battery must not be opened. Do not at­
tempt to make any changes to the electro­
lyte level of the battery. Otherwise, there is
a risk that a mixture of oxygen and hydrog en
gas can accumulate and cause an explosion.
Important safety warnings for handling a
car battery
All work on batteries requires specialist knowl­
edge.
The vehicle battery is located under the floor
panel in the luggage compartment.
® Wear
safety glasses!
A Battery
acid is extremely corrosive. Wear
protective gloves and safety glasses.
@ Keep
open flames, sparks, uncovered
lights and lit cigarettes away from the
battery!
� A
highly explosive mixture of gases is giv-
en off when the battery is under charge!
® Keep
children away from the battery and
battery acid.
A WARNING
Always be aware of the danger of injury and
chemical burns as well as the risk of accident Checking
and topping up fluids
or fire when working on the battery and the
electrical system.
- Wear safety glasses. Do not allow acid or
lead particles to come into contact with
eyes, skin or clothing.
- Battery acid is extremely corrosive. Wear
protective gloves and safety glasses. Do not
tilt the battery -acid can leak out of the va­
pour vent. If electrolyte should splash into
the eyes rinse at once for several minutes
using clear water. Then seek medical care
immediately. Neutralize any acid splashes
on the skin or clothing with soap solution,
and rinse off with plenty of water. If acid is
swallowed by mistake, consult a doctor im­
mediately.
- Keep open flames, sparks, uncovered lights
and lit cigarettes away from battery. Avoid
sparks (including those from static charges)
when handling cables and electrical equip­
ment. Never cross the battery poles. The re­
sulting high-energy sparks can cause injury.
-A highly explosive mixture of gases is given
off when the battery is under charge. Only
charge battery in a well ventilated area.
- Keep children away from the battery and
battery acid.
- Switch off all electrical equipment and the
ignition before starting any work on the ve­
hicle's electrical system. The minus cable of
the battery must be disconnected. When
changing a light bulb, it is sufficient to only
turn off the light.
- Before disconnecting the battery, turn off
the anti-theft alarm system*! Otherwise the
alarm will be triggered.
- When disconnecting the battery from the
vehicle's electrical system, first disconnect
the minus cable and then the plus cable.
- Before reconnecting the battery, turn off all
electrical equipment. First connect the plus
cable, then the minus cable. The battery ca­
bles must NOT be connected to the wrong
battery poles -this can cause an electrical
fire.
- Never charge a frozen or thawed out battery
- risk of explosion and chemical burns! A
battery must be replaced once it has frozen.
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