Get Maintenance -> 12 V vehicle battery Guide for Volkswagen Touran 4 Door Third Generation (2022-2025)

Introduction

The 12-volt vehicle battery is a component of the electrical system and serves to supply energy to the vehicle. During

maintenance procedures, the 12 V vehicle battery is checked and replaced if necessary.

You may only perform procedures on the electrical system yourself if you are familiar with the necessary activities

and the general safety precautions, and if the correct operating equipment and fluids and suitable tools are available.

Work performed incorrectly can result in serious injuries →

.

Information about warning and indicator lights can be found in the troubleshooting section at the end of the chapter

(→ 12-V vehicle battery).

Battery switch-off in an accident with triggering of the airbag

In vehicles with a 12 V vehicle battery in their vehicle interior or luggage compartment, the electrical connection to

the 12 V vehicle battery is pyrotechnically disconnected in an accident with airbag deployment. This prevents a short

circuit. For more information on the installation location of the vehicle battery, refer to section (→ 12-V vehicle

battery).

Detailed warnings for the 12 V vehicle battery

Always wear eye protection.

Battery acid is highly corrosive. Always wear protective gloves and eye protection.

Fire, sparks, open flame, and smoking are forbidden.

A highly explosive mixture of gases forms when charging the 12 V vehicle battery.

Always keep children away from battery acid and the 12 V vehicle battery.

Always heed the Owner's Manual.

WARNING

Performing work on the 12 V vehicle battery and the electrical system can cause serious injuries, fires, or electric

shocks. This could result in serious injuries.

● Always read and follow the warning information on the 12 V vehicle battery.

● Before performing any work on the 12 V vehicle battery, switch off the ignition and all electrical equipment and

disconnect the 12 V battery negative cable.

● Always keep children away from battery electrolyte and the 12 V vehicle battery.

● When handling 12 V vehicle batteries, always protect your hands, arms, and face from spraying battery acid.

● Always wear eye protection and safety gloves.

● Never short circuit the battery terminals.

● Have all work performed by suitably qualified professionals. Volkswagen recommends contacting an authorized

Volkswagen dealer or authorized Volkswagen Service Facility.

WARNING

When work is carried out on the 12 V vehicle battery, a highly explosive, flammable gas mixture builds up. Sparks

could form and ignite the flammable gas that is released by the 12 V vehicle battery. This can result in serious injury

or death.

● Always keep fires, sparks, open flames, and lit cigarettes far away from the 12 V vehicle battery.

● Avoid creating sparks when working with wires and electrical equipment or when discharging static electricity.

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NOTICE

UV rays can damage the battery housing.

● Do not expose the 12 V vehicle battery to direct sunlight for a long period of time.

NOTICE

The 12 V vehicle battery could freeze and be destroyed.

● Protect the 12 V vehicle battery against freezing temperatures if the vehicle is parked for long periods of time.

System settings after a battery change

If the 12 V vehicle battery is replaced or after a successful jump-start, system settings may be changed or deleted.

1. Check the date and time and adjust them if necessary.

2. Check personal convenience settings and adjust and save them as necessary.

12 V vehicle batteries can contain toxic substances such as sulfuric acid and lead. Dispose of the 12 V

vehicle battery according to legal and environmental regulations and only at a collection point for old

batteries, e.g. a recycling center or specialist retailer.

Battery acid can pollute the environment. Collect any leaking fluids and dispose of them according to legal

and environmental regulations.

Checking the 12 V vehicle battery acid level

The 12 V vehicle battery does not require any maintenance.

Check the acid level of the 12 V vehicle battery regularly if mileage is high, in countries with warm climates, or if the

12 V vehicle battery is old.

12 V vehicle battery location

The 12 V vehicle battery is located in the hood space.

Preparations

1. Prepare the vehicle for work in the hood space.

2. Wear suitable eye protection and safety gloves.

3. Open the hood.

Checking the Acid Level

WARNING

Battery acid is corrosive. Contact with battery acid, especially swallowing battery acid, can result in serious burns.

● Never open a 12 V vehicle battery.

● Never tilt the 12 V vehicle battery. Acid can leak out of the vent openings.

● Protect your skin, face, and particularly your eyes when working with the 12 V vehicle battery.

● Do not eat, drink, or smoke when working on the 12 V vehicle battery.

● Wash your skin with soap and water after working on the 12 V vehicle battery.

● If acid comes into contact with your skin or hair, remove all soiled or wet clothing and wash your skin and hair

with water. Consult a doctor.

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● If acid comes into contact with your eyes, rinse the affected area carefully with water for several minutes. Then

consult a doctor immediately.

● If you swallow battery acid, immediately drink plenty of water and swallow activated charcoal. Consult a doctor

immediately.

● If you have inhaled acid vapors, leave the hazard area and breathe in fresh air. Consult a doctor immediately.

WARNING

When work is carried out on the 12 V vehicle battery, a highly explosive, flammable gas mixture builds up. Sparks

could form and ignite the flammable gas that is released by the 12 V vehicle battery. This can result in serious injury

or death.

● Always keep fires, sparks, open flames, and lit cigarettes far away from the 12 V vehicle battery.

● Avoid creating sparks when working with wires and electrical equipment or when discharging static electricity.

Depending on the vehicle equipment, an additional bracket must be removed to see the viewing window. An

additional tool that is not available in the vehicle tool kit is required to do this. Always have the acid level of the 12 V

vehicle battery checked by an authorized Volkswagen dealer or authorized Volkswagen Service Facility. Volkswagen

recommends contacting an authorized Volkswagen dealer or authorized Volkswagen Service Facility.

Fig. 1 On the top of the 12 V vehicle battery: Window

(general example).

Make sure there is enough lighting to clearly see the color indicator in the circular window on the top of the 12 V

vehicle battery → fig. 1.

Light yellow or colorless

—The 12 V vehicle battery acid level is too low. Have the 12 V vehicle battery replaced by an authorized Volkswagen

dealer or authorized Volkswagen Service Facility. Volkswagen recommends contacting an authorized Volkswagen

dealer or authorized Volkswagen Service Facility.

Black

—The 12 V vehicle battery acid level is OK.

The acid level of 12 V vehicle batteries labeledAGM

cannot be checked for technical reasons. Suitably qualified professionals can inspect the battery. Volkswagen

recommends contacting an authorized Volkswagen dealer or authorized Volkswagen Service Facility.

Charging, replacing, disconnecting, or connecting the 12 V vehicle battery

If you suspect that the 12 V vehicle battery is damaged or malfunctioning, see suitably qualified professionals to have

the 12 V vehicle battery checked. Volkswagen recommends contacting an authorized Volkswagen dealer or

authorized Volkswagen Service Facility.

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Charging the 12 V vehicle battery

The 12 V vehicle battery should be charged by suitably qualified professionals because the 12 V vehicle battery that is

installed at the factory requires a charging process where the voltage is limited → . Volkswagen recommends

contacting an authorized Volkswagen dealer or authorized Volkswagen Service Facility.

Replacing the 12 V vehicle battery

The 12 V vehicle battery is designed to fit the location where it is installed and is equipped with safety features. If a

12 V vehicle battery needs to be replaced, have the replacement part fitted by qualified professionals. Check with

qualified professionals to find out the component information regarding size and the required maintenance,

performance, and safety features. They must possess the necessary technical documentation and equipment.

Volkswagen recommends contacting an authorized Volkswagen dealer or authorized Volkswagen Service Facility. The

vent opening on the 12 V vehicle battery must always be located on the negative terminal side. The vent opening on

the positive terminal side must always be sealed →

.

Only use a maintenance-free 12 V vehicle battery that conforms to the TL 825 06 and VW 7 50 73 standards. These

standards must be from October 2014 or later.

Always have the 12 V vehicle battery replaced by qualified professionals because the vehicle electronics must be

adapted as part of the replacement. Only qualified professionals have the necessary equipment to perform the

adaptation and have access to the correct replacement batteries.

Disconnecting the 12 V vehicle battery

If the 12 V vehicle battery must be disconnected from the vehicle electrical system, note the following:

1. Switch off all electrical consumers.

2. Unlock the vehicle before disconnecting the battery. Otherwise, the anti-theft alarm system will be triggered.

3. Disconnect the negative cable first, and then the positive cable→

.

Connecting the 12 V vehicle battery

If the 12 V vehicle battery must be connected to the vehicle electrical system, note the following:

1. Switch off all electrical consumers.

2. Connect the positive cable first, and then the negative cable→

.

Various indicator lights may turn on after connecting the 12 V vehicle battery and switching the ignition on. They will

turn off after driving a short distance at a speed of approx. 15 to 20 km/h (approx. 10 to 12 mph). If the indicator

lights light up and remain on, contact an authorized Volkswagen dealer or authorized Volkswagen Service Facility and

have the vehicle checked. Volkswagen recommends contacting an authorized Volkswagen dealer or authorized

Volkswagen Service Facility.

If the 12 V vehicle battery was disconnected for a long period of time, the next scheduled maintenance may not

display correctly or it may not be calculated correctly (→ Service interval display). Follow the maximum permissible

service intervals .

Vehicles with a starter button:If the ignition cannot be switched on after connecting the 12 V vehicle battery, carry

out the following activities:

1. Lock and unlock the vehicle from the outside.

2. Try to switch the ignition on again.

3. If the ignition will not switch on, see an authorized Volkswagen dealer or authorized Volkswagen Service

Facility for assistance.

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Automatic equipment deactivation

If the ignition is switched on for a very long time when the engine is off or the exterior lighting is switched on when

parking for a very long time, the intelligent power management cannot always prevent the 12 V vehicle battery from

being discharged.

If the 12 V vehicle battery is under a heavy load, the intelligent power management will automatically begin certain

measures to prevent the 12 V vehicle battery from draining.

—The idle speed will be increased so that the alternator delivers more power.

—If necessary, equipment that uses a lot of power will have its performance limited or will be switched off.

—The power supply to the 12 V socket will be interrupted temporarily when the engine is started.

12 V Vehicle Battery Draining

If the battery is drained, it may not be possible to start the engine. The 12 V vehicle battery will be drained in the

following situations:

—If the vehicle is parked for long periods of time without running the engine, especially if the ignition is on.

—If electrical equipment is used when the ignition is switched off.

—If the auxiliary heater is operated.

WARNING

Use of a 12 V vehicle battery that does not have identical specifications and dimensions to the 12 V vehicle battery

that was installed at the factory may cause short circuits or fire. This could result in serious or fatal injuries.

● Always use a maintenance-free and leak-proof 12 V vehicle battery that has the same characteristics,

specifications, and dimensions as the 12 V vehicle battery that was installed at the factory.

WARNING

Fitting 12 V vehicle batteries incorrectly may cause short circuits or fire. This could result in serious or fatal injuries.

● Always attach the 12 V vehicle battery to the attachment points provided in the vehicle.

● Replace all covers that are required for the vehicle back on the battery.

WARNING

A highly explosive mixture of oxyhydrogen can form when charging the 12 V vehicle battery. Sparks or naked flames

could ignite the gas mixture. This could cause serious burns.

● Only charge 12 V vehicle batteries in well-ventilated areas.

● Keep sparks and naked flames away from the 12 V vehicle battery.

WARNING

If the degassing tube is not attached to the 12 V vehicle battery correctly, the highly explosive gas mixture that

builds up when the vehicle is running may enter the vehicle interior. The flammable gas could ignite and cause

serious injuries or death.

● For vehicles with the 12 V vehicle battery in the vehicle interior or luggage compartment, ensure that the

degassing hose is connected to the 12 V vehicle battery correctly. The degassing hose must always be connected

to the negative terminal side of the 12-volt vehicle battery.

● Always ensure that the opening on the positive terminal side of the 12 V vehicle battery is capped.

CAUTION

A drained 12 V vehicle battery can freeze at temperatures around 0 °C(+32 °F). Acid can escape from a frozen and

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defrosted 12 V vehicle battery. This can cause injuries and long-term damage to the vehicle.

● Never charge a frozen or thawed 12 V vehicle battery.

● Always replace the 12 V vehicle battery if it freezes.

CAUTION

Cables that are connected incorrectly can cause a short circuit. This could damage the on-board electronics and

result in serious injuries.

● Connect the positive cable first and then the negative cable.

NOTICE

If the 12 V vehicle battery is connected or disconnected when the ignition is switched on or the engine is running,

this could damage the electrical system or electronic components, resulting in electrical malfunctions.

● Never connect or disconnect the 12 V vehicle battery when the ignition is on or the engine is running.

NOTICE

If accessories that provide power for charging the 12 V vehicle battery are connected to the 12 V socket, this could

damage the electrical system or electronic components, resulting in electrical malfunctions.

● Never connect accessories that provide power, such as solar panels or battery chargers, to the 12 V socket in

order to charge the 12 V vehicle battery.

Troubleshooting

12-volt power supply

The red warning light turns on.

Do not continue driving! Possible failure of the electrical system.

A message is shown in the instrument cluster display.

1. Stop the vehicle immediately and park it safely.

2. Turn off electrical equipment that is not needed.

3. Stop the engine and switch the ignition off.

4. Contact an authorized Volkswagen dealer or authorized Volkswagen Service Facility for assistance.

If the red warning light comes on, the start-stop system is switched off. The start-stop system will only be

automatically switched on again after the engine is restarted.

12-volt power supply

The yellow indicator light turns on.

A message regarding the battery charge level of the 12 V vehicle battery is shown in the instrument cluster display.

1. Let the engine run so that the 12 V vehicle battery can be recharged.

2. If the message about the battery charge level of the 12 V vehicle battery does not turn off after a few minutes

despite the measures having been taken, then contact an authorized Volkswagen dealer or authorized

Volkswagen Service Facility.

A message regarding the 12 V power supply is shown in the instrument cluster display.

1. Contact an authorized Volkswagen dealer or authorized Volkswagen Service Facility for assistance.

If the yellow indicator light lights up, the start-stop system will not be able to start the engine. If the yellow indicator

light has turned off, the 12 V vehicle battery has a sufficient battery charge level to automatically restart the engine.

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Maintenance -> 12 V vehicle battery for Your Volkswagen Touran 4 Door Third Generation (2022-2025)

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