Jump starting using another battery

If the start battery is discharged, current from another battery can be used to start the vehicle.

The jumper cable connects the points. Engine compartment appearance may vary depending on vehicle model and equipment level.

To avoid short circuits or other damage, the following steps are recommended when jump starting the battery using another battery:

1. 1
   Put the ignition in mode 0.
2. 2
   Make sure the auxiliary battery (the battery used to jump start the discharged battery) has a voltage of 12 volts.
3. 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.
4. 4
   Clamp the red jumper cable onto the auxiliary battery's positive (+) terminal (1).
5. 5
   Fold back the cover over your vehicle's positive (+) jump start terminal (2).
6. 6
   Clamp the other end of the red jumper cable to your vehicle's positive (+) jump start terminal (2).
7. 7
   Clamp the black jumper cable onto the auxiliary battery's negative (-) terminal (3).
8. 8
   Clamp the other end of the black jumper cable to your vehicle's negative (-) ground point (4).
9. 9
   Make sure the jumper cables are securely attached to help prevent sparks while jump starting.
10. 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.
11. 11
    Start the engine of the vehicle with the dead battery.
12. 12
    Remove the jumper cables in the reverse order ‒ first the black cables and then the red cables.

    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.

• Never use a 48 V auxiliary battery to start the vehicle.
• External electrical equipment may not under any circumstance be connected to the 48 V battery.
• Only a workshop may replace or perform service on the 48 V battery – an authorized Volvo workshop is recommended.

• Batteries generate hydrogen gas, which is highly flammable and explosive.
• Do not connect the jumper cable to any part of the fuel system or to any moving parts. Avoid touching hot exhaust manifolds.
• Battery fluid contains sulfuric acid. Do not allow battery fluid to contact eyes, skin, fabrics, or painted surfaces.
• If contact occurs, immediately flush the affected area with water. Seek medical attention immediately if eyes are affected.
• Never expose the battery to open flame or electrical sparks. Do not smoke near the battery. Failure to follow the instructions for jump starting can lead to injury.