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:
When the tire inflation pressure monitoring system1 detects low
inflation pressure in a tire, immediate action is required.
If the system's indicator symbol
illuminates and the message Tire pressure low is displayed, check the tire
pressure and inflate if necessary...
A Care Key enables the vehicle owner to set a maximum speed limit for the
vehicle. This limit is intended to promote safe use of the vehicle, e.g. when it
is loaned out.
A maximum vehicle speed can be defined for a Care Key. Otherwise, the Red Key
functions in the same way as a standard remote key...