2019-2026 Volvo V90 SUV STARTING AND DRIVING -> Jump starting using another battery User Manual
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STARTING AND DRIVING -> Jump starting using another battery for Your Volvo V90 SUV Second Generation (2019-2026)

STARTING AND DRIVING  
3. If the auxiliary battery is in another vehicle,  
turn off that vehicle's engine and make  
sure that the vehicles are not touching  
each other.  
Battery drain  
Jump starting using another  
battery  
If the start battery is discharged, current from  
another battery can be used to start the vehi-  
cle.  
The electrical functions in the vehicle drain  
the battery to varying degrees. Avoid using  
ignition mode II when the engine is switched  
off. Use ignition mode I instead, as this uses  
less electrical current.  
4. Clamp the red jumper cable onto the auxil-  
iary battery's positive (+) terminal (1).  
Note that certain accessories may also drain  
power from the electrical system. Do not use  
functions that use a lot of electrical current  
when the engine is turned off. Examples of  
such functions are:  
CAUTION  
Connect the jump cable carefully to pre-  
vent short circuits with other components  
in the engine compartment.  
blower  
headlights  
5. Fold back the cover over your vehicle's  
positive (+) jump start terminal (2).  
windshield wipers  
audio system (especially at high volume).  
6. Clamp the other end of the red jumper  
cable to your vehicle's positive (+) jump  
start terminal (2).  
If the starter battery voltage is low, a message  
is shown in the driver display. The vehicle's  
energy-saving function will then turn off or  
reduce certain functions, such as the blower  
and/or the audio system.  
Jumper cable connecting points. Engine compart-  
ment appearance may vary depending on vehicle  
model and equipment level.  
7. Clamp the black jumper cable onto the  
auxiliary battery's negative (-) terminal (3).  
To avoid short circuits or other damage, the  
following steps are recommended when jump  
starting the battery using another battery:  
8. Clamp the other end of the black jumper  
cable to your vehicle's negative (-) ground  
point (4).  
Charge the battery by starting the engine  
and let it run for at least 15 minutes (driv-  
ing charges the battery faster than letting  
the engine idle).  
1. Put the ignition in mode 0.  
9. Make sure the jumper cables are securely  
attached to help prevent sparks while  
jump starting.  
2. Make sure the auxiliary battery (the bat-  
tery used to jump start the discharged  
battery) has a voltage of 12 volts.  
Related information  
Start battery (p. 582)  
Ignition modes (p. 385)  
424  
STARTING AND DRIVING  
10. Start the engine of the assisting vehicle  
and let it run for a few minutes at a higher  
idling speed than normal, about  
1500 rpm.  
WARNING  
WARNING  
High voltage may be dangerous if handled  
incorrectly. Do not touch anything on bat-  
teries that is not clearly described in this  
Owner's Manual.  
Batteries generate hydrogen gas,  
which is flammable and explosive.  
Do not connect the jumper cable to  
any part of the fuel system or to any  
moving parts. Avoid touching hot  
manifolds.  
11. Start the engine of the vehicle with the  
dead battery.  
Never use a 48 V support battery to  
jump start the vehicle.  
CAUTION  
External electrical equipment may not  
under any circumstance be connected  
to the 48 V battery.  
Battery fluid contains sulfuric acid. Do  
not allow battery fluid to contact eyes,  
skin, fabrics or painted surfaces.  
Do not touch the connections between the  
cable and the vehicle during the start  
attempt. Risk of sparking.  
Only a workshop may replace or per-  
form service on the 48 V battery – an  
authorized Volvo workshop is recom-  
mended.  
If contact occurs, flush the affected  
area immediately with water. Obtain  
medical help immediately if eyes are  
affected.  
12. Remove the jumper cables in the reverse  
order first the black cables and then the  
red cables.  
Never expose the battery to open flame  
or electric spark. Do not smoke near  
the battery. Failure to follow the  
instructions for jump starting can lead  
to injury.  
Make sure that none of the clamps of the  
black jumper cables come into contact  
with either vehicle's positive (+) jump start  
terminals or either of the red jumper  
cable's connected clamps.  
WARNING  
PROPOSITION 65 WARNING! Battery  
posts, terminals, and related accessories  
contain lead and lead compounds, chemi-  
cals known to the state of California to  
cause cancer and reproductive harm. Wash  
hands after handling.  
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