Volvo XC90: Key, locks and alarm / Electronic immobilizer
The electronic immobilizer is a start inhibitor that helps prevent the vehicle
from being started by an unauthorized person.
The vehicle can only be started with the right remote key.
The following instrument panel error messages are related to the electronic immobilizer:

Remote immobilizer with tracking system
(Only certain markets and in combination with Volvo On Call.)
The vehicle is equipped with a system that makes it possible to track and locate
the vehicle and to remotely activate the immobilizer to prevent the vehicle from
being started. Contact your nearest Volvo retailer for more information and assistance
activating the system.
The following instrument panel error messages are related to the remote immobilizer
with tracking system:

The detachable key blade can be used to unlock the vehicle from the outside,
e.g. if the battery in the remote key is discharged.
Unlocking
Pull the front left-hand door handle
to its end position to access the lock cylinder...
The following information contains type designations for the start and lock
system.
Alarm system
USA FCC ID: MAYDA 5823(3)
This device complies with part 15 of the FCC rules...
Other information:
Vehicles with the Start/Stop function are equipped with two batteries – a
more powerful 12 V start battery and a support battery that provides stronger current
during the function's start sequence.
The 12 V support battery is located in a box next to the spring
strut in the engine compartment...
The steering wheel has a horn and controls for e.g. driver support systems
and voice control.
Steering wheel keypads and paddles*.
Driver support system controls.1
Paddle* for manually shifting gears
(automatic transmission).
Controls for voice commands, adjusting
the head-up display, accessing menus and messages, and handling phone calls...