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MAINTENANCE AND SERVICE
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621
Support battery
In addition to the start battery, vehicles equipped
with the Start/Stop function also have a support
battery.
Vehicles with the Start/Stop function are equip-
ped with two 12-volt batteries ‒ a heavy-duty
start battery and a support battery that provides
extra current during the Start/Stop function's
start sequence.
The support battery is located in a box next to the spring
strut in the engine compartment.
NOTE
•
The higher the current consumption in
the vehicle, the more the alternator has to
work and the batteries have to be
charged = increased fuel consumption.
•
When the starter battery capacity has
dropped below the lowest permissible
level, the Start/Stop function is disen-
gaged.
When the Start/Stop function is temporarily
reduced due to high current consumption:
•
The engine will auto-start, even if the driver
does not lift their foot from the brake pedal.
The support battery does not normally require
more service than the start battery. If you have
any questions or concerns, consult a workshop ‒
an authorized Volvo workshop is recommended.
CAUTION
If the following is not observed, the Start/
Stop function may temporarily stop working
after connection of an external starter battery
or battery charger:
•
The negative battery terminal of the vehi-
cle's starter battery must never be used
to connect an external starter battery or
battery charger – only the vehicle's neg-
ative charging point should be used as
a grounding point.
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