Volvo S90 2019 Owner's Manual page 612

MAINTENANCE AND SERVICE
Support battery
Cars with the start/stop function are equip-
ped with two batteries - one more powerful
12 V starter battery for starting and one sup-
port battery that helps during the function's
starting sequence.
The 12 V support battery is located in a box next to
the strut tower.
14 Automatic starting can only take place if the gear lever is in neutral position.
610
NOTE
The higher the current take-off in the
•
car, the more the alternator must be
working and the batteries charging =
Increased fuel consumption.
When the capacity of the battery has
•
fallen below the lowest permissible
level then the Start/stop function is
disengaged.
Temporarily reduced Start/stop function due
to high current take-off means:
The engine starts automatically
•
the driver depressing the clutch pedal
(manual gearbox).
The engine starts automatically without
•
the driver lifting his/her foot off the foot
brake pedal (automatic gearbox).
The support battery normally requires no more
service than the normal starter battery. A
workshop should be contacted in the event of
questions or problems - an authorised Volvo
workshop is recommended.
IMPORTANT
If the following instruction is not observed
then the Start/stop function may temporar-
ily cease to work after the connection of an
external battery or battery charger:
The negative battery terminal on the
•
car's starter battery must never be
used for connecting an external starter
battery or battery charger – only the
car's negative charging point may be
used as the grounding point.
14
without