2021 VOLKSWAGEN T-ROC check engine

Connecting the 12-volt vehicle battery
-volt vehicle
battery.
e cable and then the negative cable ⇒ .
Various indicator lamps may light up after the 12-volt vehicle battery has been connected and the
ignition is switched on. They will go out when you drive a short distance at a speed of approximately
15 – 20 km/h (10 – 12 mph). If the indicator lamps remain lit up, the vehicle should be checked by a
qualified workshop.
If the 12-volt vehicle battery was disconnected for an extended period, the system may not able to
calculate or correctly display the time when the next service is due ⇒ Instrument cluster . Observe
the maximum permissible service intervals ⇒ Service .
Automatic switch-off for electrical consumers
The intelligent vehicle electrical system management function automatically implements a range of
measures to prevent the 12-volt vehicle battery from discharging under high loads:


power supply to the 12-volt socket and the cigarette lighter may be interrupted temporarily
while the engine is being started.
The vehicle electrics management system cannot always prevent the 12-volt vehicle battery from
being discharged, for example if the ignition is left on over a long period with the engine off or the
side lights or parking lights are left on over a long period of time.
12-volt vehicle battery is discharged
gnition is switched on.

⇒ Auxiliary heater and ventilation .

WARNING
Incorrectly mounting the battery and using incorrect 12-volt vehicle batteries can cause short
circuits, fire and serious injuries.
-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
A highly explosive mixture of gases is given off when the 12-volt vehicle battery is being charged.

-volt vehicle batteries should be charged only in well-ventilated spaces.
-volt vehicle battery. Discharged 12-volt vehicle batteries can
already freeze at temperatures of around 0°C (+32°F).
-volt vehicle battery must be replaced if it has ever been frozen.
the negative cable.

NOTICE
-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 and electrical
malfunctions can occur.
to the 12-volt socket or to the cigarette lighter in order to charge the 12-volt vehicle battery. The
electrical system of the vehicle could otherwise be damaged.

12-volt vehicle batteries may contain toxic substances such as sulphuric acid and lead. Dispose of the
12-volt vehicle battery in accordance with the regulations.

Electrolyte can pollute the environment. Collect any service fluids that escape or are spilt and
dispose of them properly.
Troubleshooting
First read and observe the introductoryinformation and safety warnings⇒Introduction 
Vehicle battery (12-volt)
The indicator lamp lights up red.
Fault in the alternator. The 12-volt vehicle battery will not be charged by the alternator while the
vehicle is in motion.
Switch off any electrical consumers that are not required. Inform a qualified workshop. Have the
electrical system checked.
The start/stop system cannot start the engine ⇒ Start/stop system .
and vehicle battery (12-volt)
The central warning lamp lights up red and the text message 12 V battery not charging. Stop vehicle.
is displayed.

Fault in the alternator. The 12-volt vehicle battery will not be charged by the alternator while the
vehicle is in motion.
Switch off any electrical consumers that are not required. Inform a qualified workshop. Have the
electrical system checked.
The start/stop system cannot start the engine ⇒ Start/stop system .
and vehicle battery (12-volt)
The central warning lamp lights up yellow and the text message 12 V battery low. Charge by driving.
is displayed.
The charge level of the vehicle battery is insufficient.
Recharge the 12-volt vehicle battery by driving the vehicle for an extended time.
The start/stop system cannot start the engine ⇒ Start/stop system .
and vehicle battery (12-volt)
The central warning lamp lights up red and the text message Replace 12 V battery. Workshop. is
displayed.
The vehicle battery condition is not ok.
Seek expert assistance and have the battery checked and replaced if necessary.
The start/stop system cannot start the engine ⇒ Start/stop system .
Wheels and tyres
Tyre monitoring system
Introduction
This chapter contains information on the followingsubjects:
⇒ Tyre Pressure Loss Indicator 
⇒ Troubleshooting for Tyre Pressure Loss Indicator 
The tyre monitoring system warns the driver when the tyre pressures are too low.
The tyre monitoring system monitors various parameters (for example, rolling circumference) of all
wheels using ABS sensors (indirect measurement).

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.

Changing a wheel can be dangerous, especially when carried out at the side of a road. Please
observe the following steps in order to reduce the risk of serious injuries:
as soon as possible and when safe to do so. Park the vehicle at a safe distance
from moving traffic in order to carry out the wheel change.
work during the wheel change.

board or similar support for the vehicle jack.
urself when you feel confident with carrying out the procedure. If not,
seek expert assistance.

ver
to the position P or select a gear on a manual gearbox in order to reduce the risk of unintended
vehicle movement.
immediately after changing a wheel.
n the case of vehicles with a Tyre Pressure Loss Indicator, the system must be re-synchronised
immediately after a wheel change⇒ Tyre Pressure Loss Indicator .
Preparations for changing a wheel
First read and observe the introductoryinformation and safety warnings⇒Introduction 
Checklist
The following actions must always be carried out in the given order in preparation for changing the
wheel ⇒ :

If your vehicle has a flat tyre, park the vehicle on a firm and level surface at a safe distance from
moving traffic.

Switch on the electronic parking brake Parking and manoeuvring.

DSG® dual clutch gearbox: move the selector lever to position P DSG® dual clutch gearbox.

Switch off the engine and remove the key from the ignition.

-piece wheel bolts: use only two-piece wheel bolts.
Lifting the vehicle with the jack

Fig. 205 Jacking points.

Fig. 206 Jack fitted at the rear on the left-side of the vehicle.
First read and observe the introductoryinformation and safety warnings⇒Introduction 
The jack may be positioned only at the reinforcements on the underbody, which are located behind
the markings on the body ⇒ Fig. 205 . Always use the jacking point closest to the wheel you are
working on ⇒ .
Checklist
For your own safety, carry out the following points in the specified order ⇒ :

Choose a firm and level surface suitable for lifting the vehicle.

Switch off the engine. Select a gear on vehicles with a manual gearbox or move the selector lever to
position P on vehicles with DSG® dual clutch gearbox DSG® dual clutch gearbox and switch on the
electronic parking brake Parking and manoeuvring.

Chock the wheel diagonally opposite using collapsible chocks or other suitable objects.

vehicle.
cle when the engine is running, or if the vehicle is tilted to one side or on a
gradient.
cause the vehicle to fall off the vehicle jack.

WARNING
Ignoring any of the items on this important safety checklist can lead to accidents and severe injuries.

Changing a wheel

Fig. 207 Changing a wheel: removing the wheel bolts with the screwdriver handle.
First read and observe the introductoryinformation and safety warnings⇒Introduction 
Removing a wheel
⇒ Preparations for changing a wheel .
⇒ Wheel bolts .
⇒ Lifting the vehicle with the jack .
⇒ Fig. 207 , completely unscrew the loosened
wheel bolts and place them on a clean surface.

Fitting the spare wheel or temporary spare wheel
y attention to the tyre direction of rotation ⇒ Tyre lettering and tyre type .

The air compressor from the breakdown set may be operated from the 12-volt socket, even if the
power rating on the type plate of the air compressor exceeds the maximum power rating of the
socket.
Preparations
First read and observe the introductoryinformation and safety warnings⇒Introduction 
Checklist
Always carry out the following actions in the given order ⇒ :

If your vehicle has a flat tyre, park the vehicle on a firm and level surface at a safe distance from
moving traffic.

Switch on the electronic parking brake Parking and manoeuvring.

DSG® dual clutch gearbox: move the selector lever to position P DSG® dual clutch gearbox.

Switch off the engine and remove the key from the ignition.

Manual gearbox: select a gear Manual gearbox: selecting a gear.

Ask all vehicle occupants to leave the vehicle and stand at a safe distance away from moving traffic.

Switch on the hazard warning lights and set up the warning triangle In an emergency. Observe any
legal requirements.

Check whether the puncture can be repaired with the breakdown set The tyre sealant must not be
used:.

When towing a trailer: unhitch the trailer from the vehicle and park it properly .

Scope of service
The scope of service includes all maintenance work that is necessary in order to keep your vehicle
roadworthy (depending on the operating conditions and vehicle equipment, e.g. engine, gearbox or
service fluids). The maintenance work is divided into inspection work and servicing work. You can
find out what work is required in detail for your vehicle:



Inspection work
Electrics
-volt vehicle battery: check and replace if necessary.




Engine/gearbox


tem: check.
-belt: check.



Running gear



heck.