Volvo XC90 T8 TwinEngine Plug-In Hybrid Owner's Manual page 360

STARTING AND DRIVING
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1. Switch the ignition off completely (mode 0).
2. Ensure that the auxiliary battery to be used is
12-volt.
3. If the 12-volt auxiliary battery to be used is in
another vehicle, switch off that vehicle's igni-
tion and be sure that the vehicles are not
touching each other.
4. Connect one of the red jumper cable's
clamps to the auxiliary battery's positive (+)
terminal (1).
CAUTION
Connect the jumper cables carefully to avoid
short circuits with other components in the
engine compartment.
5. Open the cover over the positive (+) jump
start terminal (2).
6. Connect the red jumper cable's other clamp
to your vehicle's positive (+) jump start termi-
nal (2).
7. Connect one of the black jumper cable's
clamps to the auxiliary battery's negative (–)
terminal (3).
8. Connect the black jumper cable's other
clamp to your vehicle's negative (–) jump
start terminal (4).
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9. Check that the jumper cables are securely
attached to help avoid sparks when the vehi-
cle is started.
10. Start the engine in the assisting vehicle and
run it for a short time at approx. 1,500 rpm.
11. Start the engine in your vehicle. If the vehicle
does not start, allow an additional
10 minutes of charging time and then try to
start the engine again.
NOTE
During normal starts, the electric motor is pri-
oritized and the gasoline engine will not start.
This means that when the start knob has
been turned toward START and released, the
electric motor is activated ("started") and the
vehicle is ready to be driven. The warning and
information symbols in the instrument panel
will go out and the chosen theme will be dis-
played to indicate that the electric motor has
been activated.
CAUTION
Do not touch the jumper cable connections
while the vehicle is being started. This could
generate sparks.
12. After the vehicle has started, carefully
remove the jumper cables in reverse order,
beginning with the black one.
Ensure that the black jumper cable's clamps
do not come in contact with the vehicle's or
the auxiliary battery's positive terminals or
the red jumper cable's clamps while it is con-
nected.
WARNING
PROPOSITION 65 WARNING!
Battery posts, terminals, and related accesso-
ries contain lead and lead compounds, chemi-
cals known to the state of California to cause
cancer and reproductive harm. Wash hands
after handling.
WARNING
•
Do not connect the jumper cable to any
part of the fuel system or to any moving
parts. Avoid touching hot manifolds.
•
Batteries generate hydrogen gas, which
is flammable and explosive.
•
Battery fluid contains sulfuric acid. Do not
allow battery fluid to contact eyes, skin,
fabrics or painted surfaces. If contact
occurs, flush the affected area immedi-
ately with water. Obtain medical help
immediately if eyes are affected.
•
Never expose the battery to open flame
or electric spark.