Get Maintenance -> Charging, replacing, disconnecting and connecting the 12-volt vehicle battery Guide for Volkswagen Transporter Van Seventh Generation (2021-2025)

Charging, replacing, disconnecting and connecting the 12-volt vehicle battery

If you suspect that the 12-volt vehicle battery is damaged or faulty, consult a suitably qualified workshop and have

the 12-volt vehicle battery examined and, if necessary, replaced.

Charging the 12-volt vehicle battery

The 12-volt vehicle battery should always be charged by a correspondingly qualified workshop, as the technology

used in factory-fitted 12-volt vehicle batteries requires voltage-limited charging →

Replacing the 12-volt vehicle battery

The 12-volt vehicle battery has been developed to suit the conditions of its location and has special safety features.

If a 12-volt vehicle battery has to be replaced, the replacement part must be installed by a workshop qualified to do

this. For component information on size and the required maintenance, capacity and safety features, please contact a

correspondingly qualified workshop, which must have the necessary technical documentation and equipment. The

ventilation opening of the 12-volt vehicle battery must always be on the negative terminal side. The ventilation

opening on the positive terminal side must always be sealed.

Only maintenance-free 12-volt vehicle batteries compliant with the standards TL 825 06 and VW 7 50 73 should be

used. These standards must be dated October 2014 or later.

The 12-volt vehicle battery must always be replaced by a workshop qualified to do this, as the vehicle electronics

must be adapted as part of the replacement process. In addition, the battery parameters for functional safety were

determined only with the original equipment battery. Only correspondingly qualified workshops have the technology

required to carry out this adjustment and also the correct replacement batteries. The use of unsuitable batteries can

render the type approval invalid.

Disconnecting and connecting the 12-volt vehicle battery

The 12-volt vehicle battery cannot be disconnected and connected for technical reasons.

Always have the 12-volt vehicle battery disconnected and connected by a suitably qualified workshop.

Automatic switch-off for electrical consumers

An intelligent vehicle electrical system management function automatically implements a range of measures to

prevent the 12-volt battery from discharging under high loads:

—The performance of large electrical consumers may be reduced or they may be switched off completely.

The vehicle electrical system management function cannot always prevent the 12-volt vehicle battery from

discharging, e.g. if the ignition is switched on for an extended period with the engine off, or when the side or parking

lights are on when the vehicle is parked for long periods.

What causes the 12-volt vehicle battery to discharge?

The 12-volt vehicle battery will discharge if you use electrical consumers when the engine is switched off.

WARNING

Incorrectly securing the battery and using incorrect 12-volt vehicle batteries can cause short circuits, fire and

serious injuries.

● Always use maintenance-free and leak-proof 12-volt vehicle batteries that have the same properties,

specifications and dimensions as the factory-fitted 12-volt vehicle battery.

WARNING

513

A highly explosive mixture of gases is given off when the 12-volt vehicle battery is being charged.

● 12-volt vehicle batteries should only be charged in well-ventilated spaces.

● Never charge a 12-volt vehicle battery which is frozen or has been frozen. Discharged 12-volt vehicle batteries

can even freeze at temperatures of approx. 0°C (+32°F).

● The 12-volt vehicle battery must be replaced if it has ever frozen.

● In vehicles with the 12-volt vehicle battery in the interior: ensure that the gas discharge hose is connected

properly to the 12-volt vehicle battery. The breather hose must always be attached on the negative terminal side

of the 12-volt vehicle battery. If there is an opening on the positive terminal side of the 12-volt vehicle battery,

this must always be closed.

WARNING

Incorrectly connected cables can cause a short circuit.

● First connect the positive cable and then the negative cable.

NOTICE

● Never connect or disconnect 12-volt vehicle batteries if the ignition is switched on or the engine is running.

Never use a 12-volt vehicle battery that does not correspond with the vehicle’s specifications. This can damage

the electrical system or electronic components, which can cause electrical faults.

● Never connect equipment that supplies electric power, such as a solar panel or a battery charger, to the 12-volt

sockets or to the cigarette lighter to charge the 12-volt vehicle battery. This can damage the vehicle electrical

system.

Dispose of the 12-volt vehicle battery in accordance with the regulations. 12-volt vehicle batteries may

contain toxic substances such as sulphuric acid and lead.

Electrolyte can pollute the environment. Clean up any service fluid leakages and dispose of them

properly.

Troubleshooting

12-volt vehicle battery

The warning lamp lights up red. A message is shown on the instrument cluster display.

Do not drive on! This can result in damage to the electrical system.

1. Stop the vehicle as soon as possible and when safe to do so.

2. Switch off any electrical consumers that are not required.

3. Seek expert assistance.

The start/stop system cannot start the engine .

12-volt vehicle battery

The indicator lamp lights up yellow. A message is shown on the instrument cluster display.

1. Go to a correspondingly qualified workshop.

Or: Drive a short run to recharge the 12-volt vehicle battery.

514

Introduction

The tyre monitoring system warns the driver when the tyre pressures get too low.

The following tyre monitoring systems are available for this vehicle:

Tyre Pressure Loss Indicator

—Various parameters (for example, rolling circumference) of all four wheels are monitored when driving using ABS

sensors (indirect measurement).

Reference pressure

The reference pressure for the tyre monitoring system is the tyre pressure of cold tyres with maximum load for the

factory-fitted tyres. The reference pressure corresponds to the information on the tyre pressure sticker (→ Tyre

pressure).

If the tyre pressure of all four tyres has been adjusted correctly, the Tyre Pressure Loss Indicator must be re-

synchronised (→ Tyre Pressure Loss Indicator). The reference pressure is then adapted to the current tyre pressure.

WARNING

The intelligent tyre monitoring system technology cannot overcome the laws of physics, and functions only within

the limits of the system. Incorrect handling of the wheels and tyres can lead to a sudden loss of pressure in the

tyres, tread separation and even tyre blow-out.

● Check the tyre pressure regularly and always maintain the specified pressure (→ Tyre pressure). If the tyre

pressure is too low, it is possible that the tyre temperature will increase to such an extent that the tread peels off

and the tyre bursts.

● Always maintain the correct cold tyre pressure as specified on the tyre pressure sticker (→ Tyre pressure).

● Check the tyre pressure regularly when the tyres are cold. If necessary, adjust the tyre pressure in the cold tyre to

the recommended tyre pressure for the tyres installed on your vehicle (→ Tyre pressure).

● Check your tyres regularly for signs of wear or damage.

● Never exceed the maximum speed and load permitted for the fitted tyres.

If the tyre pressure is too low, this will increase fuel consumption and tyre

wear.

When new tyres are driven at high speeds for the first time, they can expand slightly and trigger a one-off

pressure warning.

Old tyres should only be replaced by tyres that have been approved by Volkswagen Commercial Vehicles for

the vehicle type.

Do not rely only on the tyre monitoring system alone. Check your tyres regularly to ensure that they are

properly inflated and have no signs of damage, such as punctures, cuts, cracks, and blisters. Remove any

objects that have become embedded in the tyre tread but have not penetrated into the body of the tyre itself.

515

Maintenance -> Charging, replacing, disconnecting and connecting the 12-volt vehicle battery for Your Volkswagen Transporter Van Seventh Generation (2021-2025)

Related Topics

Maintenance

Popular Owner Manuals

Latest Owner Manuals