2018-2025 Volkswagen Touareg SUV Check and replace -> 12-volt battery User Manual

MY CAR USER MANUAL

Check and replace -> 12-volt battery for Your Volkswagen Touareg SUV Third Generation (2018-2025)

Charging the 12-volt battery creates a  
highly explosive mixture of detonating  
gases!  
Keep children away from the 12-volt  
battery electrolyte and the battery at all  
times!  
NOTICE  
Brake fluid will damage vehicle paintwork,  
plastic parts and tyres if it comes into contact  
with them. If brake fluid spills or leaks onto  
vehicle parts, wipe it up immediately.  
Brake fluid can contaminate the  
environment. If any brake fluid leaks  
operational, pick it up and dispose of it properly.  
Always observe the operating  
instructions!  
Work on the 12-volt battery cal  
system can cause severe bu
electric shock. Always read an
following warnings and safety
before workon the battery:  
12-volt battery  
● Before workon the 12-volt by,  
switch off the ion and discont all  
the  
Introduction to the topic  
ical consumand discot the  
ble of this ry.  
The 12-volt battery is part of the electrical  
system and provides the vehicle's power supply.  
children awam the 12-  
Only carry out work on the electrical system  
yourself if you are familiar with the necess
operations and the generally applicable safety  
measures and if you have the correct tools,  
materials and operating fluids at your disposal.  
electrolyte and tattery.  
r eye protection and protective  
ry electrolyte is very aggressive. It  
cause skin and eye burns. When  
can r
Improperly performed work  
dling  
the  
12-volt  
battery,  
be  
serious injuries → . Have  
pararly careful to protect your hands,  
arms face from acid splashes.  
by a specialist workshop.
recommends that this
Volkswagen dealership
● Do not smoke while carrying out work and  
never carry out work in the vicinity of naked  
flames or in places where sparks may occur.  
Location of the 12-vol
Avoid sparks from electrostatic discharges,  
as well as when handling cables and  
electrical devices.  
The 12-volt battery is lo
hand front seat. The 12-v
accescial know
Thore, have any necessary
vbattery carried out by a specialist  
rkshop.  
● Never short-circuit the battery terminals.  
● Never use 12-volt batteries which are  
damaged. They could explode. If the 12-volt  
battery is damaged, replace it immediately.  
lkswagen recommends lkswagen  
alership for this.  
● If the 12-volt battery is damaged or has  
frozen, replace it immediately. When the  
battery is discharged, it may freeze at  
temperatures near freezing.  
Eanation of the warninmbols on the  
12t battery  
Alwayar eye proten!  
0 °C (+32 °F).  
Batteryte is highly corrosive.  
Always wear protective gloves and eye  
protection!  
It is forbidden to light a fire, to cause  
sparks, to use an unprotected flame or to  
use a naked flame.  
● If the vehicle has the 12-volt battery in the  
luggage compartment, make sure that the  
flexible degassing tube is correctly  
attached to the battery.  
sea!  
330  
Instruction manual  
 
Charge, replace and disconnect or  
connect the 12-volt battery.  
NOTICE  
● Do not expose the 12-volt battery to direct  
sunlight.  
Note  
and on page 313, and  
The housing may be damaged by prolonged  
direct sunlight because ultraviolet rays may  
damage the housing.  
and  
at the  
beginning of this chapter on page 330.  
If you suspect that the 12-volt battery is  
damaged or defective, have it checked by a  
qualified specialist workshop.  
● If the vehicle is not to be used for a period  
of time, protect the 12-volt battery from  
frost so that it does not freeze and become  
damaged as a result.  
Charging the 12-vol
After running the engine with the 12-volt  
battery deeply discharged  
If the battery is freshly changed or after using the  
start-up aid, some system settings (such as time,  
date, customised comfort settings and  
To charge the 12-volt tact a  
specialist workshop, as
in the vehicle from the faecial  
techngy that requires
voltage . Volkswagen mends that  
you  
harging  
programmes) may have been misadjusted or  
deleted. Check and correct these settings once  
visit a swagen dealer this.  
charged  
the battery is sufficiently  
ace the 12battery  
tery is desd for its lion and is  
with safety ures. If the battery  
be replaced, plcontact your  
agen dealer beforpurchasing a new  
y to find out about its electromagnetic  
patibility, size and the necessary  
maintenance, performance and safety  
requirements.  
Check the electrolyte level of
12-volt battery.  
Note  
and on page 313, and and  
330.  
at
beginning of this chapter on page  
nly 12-volt, maintenance-free batteries  
plying with the following standards may be  
use
TL 825 06 and VW 7 50 73. These standards  
have to be July 2012 or later.  
In the case of vehicles with Start-Stop system  
or independently heated vehicles  
→ p. 153, always have the 12-volt battery  
replaced by a qualified specialist workshop, as  
the vehicle's electronics must be adapted when  
replacing the battery. Only properly qualified  
specialist workshops have the appropriate  
technology to carry out the retrofitting  
correctly. Volkswagen recommends having the  
battery replaced by a Volkswagen dealer.  
Fig. 251 Sight glass oop of the 12-volt battery  
(schematic representn).  
Disconnect and connect the 12-volt  
battery.  
he 12-volt battes located under the left-  
ront sehe 12-volt battery can only be  
accessth special knowledge and tools. The  
12-volt battery's electrolyte level should  
therefore be checked by a specialist workshop.  
Volkswagen recommends that the following be  
carried out  
The 12-volt battery is located in the floor of  
the passenger seat under a bolted cover. The  
battery can be accessed by  
some parts of must be dismantled beforehand  
to a Volkswagen dealer.  
Check and replace  
331  
vehicle. If the 12-volt battery is to be  
disconnected and re-installed, a qualified  
specialist workshop should be consulted.  
Factors that cause the 12-volt battery to  
discharge  
– Prolonged stops without starting the engine,  
especially if the ignition is left switched on.  
After connecting the 12-volt battery and  
switching on the ignition, various indicator lights  
may come on. These warning lights go out after  
a short journey at a speed of approx. 15 to 20  
km/h (10 to 12 mph). If the warning lights do not  
go out, visit a specialist workshop and have the  
vehicle checked.  
– Use of electrical consumers with the engine  
switched off.  
– Independent heating in operation  
→
p. 153.  
WARNING  
If the 12-volt battery has been disconnected  
for a long period of time, it is likely that the  
next service → p. 24 will not be displayed or  
calculated correctly.  
If the 12-volt battery is inco
unsuitable batteries are used,
and serious injury may result.  
● Use only 1-volt, maintenanc
spillable bies with the samrties,  
specifications dimensions as
factory-fitted b.  
→
p. 366.  
Vehicles with Keyless Access → p. 91: If the  
ignition does not switch on after the 12-volt  
battery has been connected, lock and unlock the  
vehicle from the outside. Then try switching the  
ignition on again. If the ignition does not switch  
on, seek the assistance of qualified personnel.  
● hicle is fitteth the 12-v
he luggage partmen
he flexible ng tube s  
ched to the 1t battery.  
hat there is no opvent hole  
of the positive terminal. If there  
en degassing hole in this area,  
it with a plug. The degassing hose  
st be attached to the open degassing  
in the negative pole area.  
Automatic disconnection of consumers  
In the event of excessive demand on the 12-v
battery, the intelligent on-board network  
management system automatically takes  
measures to prevent the batter
discharging:  
– The idle speed is incre
alternator supplies m
– If necessary, the ou
powerful consumers
emergency, they are
completely.  
When the 12-volt battery is charged, a highly  
explosive mixture of detonating gases is  
produced.  
– Whne is start
ply from the 12-volt sock
ghter may be briefly interrupted.  
● The 12-volt battery should only be charged  
in a well-ventilated area.  
● Never charge a 12-volt battery that is  
frozen or has been disconnected. When the  
battery is discharged, it may freeze at  
temperatures approaching 0 °C (+32 °F).  
e on-board network manement cannot  
ways prevent the 12-volt ery from  
charging. This is the casfor example, the  
iion is left on or the pon or parking lights  
art on for a long time n the engine is  
switoff.  
● If the 12-volt battery has frozen, replace  
it without fail.  
● If the wires are connected to the poles  
incorrectly, a short-circuit may occur. The  
positive cable must be connected first, then  
the negative cable.  
332  
Instruction manual  

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