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:
Incorrectly connected or installed software or diagnostic tools may have an
adverse effect on the vehicle's electronics.
We strongly recommend that Volvo owners use only genuine, Volvo-approved accessories,
and that accessory installations be performed only by a trained and qualified Volvo
service technician...
Messages in the instrument panel are controlled using the right-side steering
wheel keypad.
Examples of messages in the instrument panel1
and the right-side steering wheel keypad.
Examples of messages in the instrument panel2 and
the right-side steering wheel keypad...