ECU CADILLAC XT4 2023 Service Manual

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
136 Instruments and Controls
Lamps On Reminder
This light comes on when the
exterior lamps are in use,
except when only the Daytime
Running Lamps (DRL) are
active. See Exterior Lamp
Controls0148.
Cruise Control Light
The cruise control light is
white when the cruise control
is on and ready, and turns
green when the cruise control
is set and active.
See Cruise Control 0270.
Adaptive Cruise Control
Light
This light is white when the
Adaptive Cruise Control (ACC,
if equipped) is on and ready,
and turns green when the
ACC is set and active.
See Adaptive Cruise Control
(Advanced) 0273.
Door Ajar Light
This light comes on when a
door is open or not securely
latched. Before driving, check
that all doors are properly
closed.
Information
Displays
Driver Information
Center (DIC)
The DIC is displayed in the
instrument cluster. It shows
the status of many vehicle
systems.
SorT:Press to move
between the interactive
display zones in the cluster.
Press
Sto go back to the
previous menu.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Instruments and Controls 143
HUD Troubleshooting
If you cannot see the HUD
image when the ignition is on,
check that:
.Nothing is covering the
HUD lens.
.The HUD brightness setting
is not too dim or too bright.
.The HUD is adjusted to the
proper height.
.Polarized sunglasses are
not worn.
.The windshield and HUD lens
are clean.
If the HUD image is not
correct, contact your dealer.
The windshield is part of the
HUD system. See Windshield
Replacement 0349.
Vehicle Messages
Messages displayed on the
Driver Information Center
(DIC) indicate the status of the
vehicle or some action that may be needed to correct a
condition. Multiple messages
may appear one after another.
The messages that do not
require immediate action can
be acknowledged and cleared
by pressing the thumbwheel.
The messages that require
immediate action cannot be
cleared until that action is
performed.
All messages should be taken
seriously; clearing the
message does not correct the
problem.
If a SERVICE message
appears, see your dealer.
Follow the instructions given
in the messages. The system
displays messages regarding
the following topics:
.Service Messages
.Fluid Levels
.Vehicle Security
.Brakes
.Steering
.Ride Control Systems
.Driver Assistance Systems
.Cruise Control
.Lighting and Bulb
Replacement
.Wiper/Washer Systems
.Doors and Windows
.Seat Belts
.Airbag Systems
.Engine and Transmission
.Tire Pressure
.Battery
Engine Power
Messages
ENGINE POWER IS
REDUCED
This message displays when
the vehicle's propulsion power
is reduced. A reduction in
propulsion power can affect
the vehicle's ability to
accelerate. If this message is
on, but there is no observed
reduction in performance,
proceed to your destination.
Under certain conditions the
performance may be reduced

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
144 Instruments and Controls
the next time the vehicle is
driven. The vehicle may be
driven while this message is
on, but maximum acceleration
and speed may be reduced.
Anytime this message stays
on, or displays repeatedly, the
vehicle should be taken to
your dealer for service as
soon as possible.
Under certain operating
conditions, propulsion will be
disabled. Try restarting after
the ignition has been off for
30 seconds.
Vehicle Speed
Messages
SPEED LIMITED TO XXX
KM/H (MPH)
This message shows that the
vehicle speed has been limited
to the speed displayed. The
limited speed is a protection
for various propulsion and
vehicle systems, such aslubrication, thermal, brakes,
suspension, Teen Driver if
equipped, or tires.
Universal Remote
System
See Radio Frequency
Statement
0446.
Universal Remote
System Programming
If equipped, these buttons are
in the overhead console. This system can replace up to
three remote control
transmitters used to activate
devices such as garage door
openers, security systems,
and home automation devices.
These instructions refer to a
garage door opener, but can
be used for other devices.
Do not use the Universal
Remote system with any
garage door opener that does
not have the stop and reverse
feature. This includes any
garage door opener model
manufactured before April
1, 1982.
Keep the original hand-held
transmitter for use in other
vehicles as well as for future
programming. Erase the
programming when vehicle
ownership is terminated. See
“Erasing Universal Remote
System Buttons”
later in this
section.
To program a garage door
opener, park outside directly in
line with and facing the garage

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Infotainment System 203
apply. For Android Auto
support and to see if your
phone is compatible, see
https://support.google.com/
androidauto. For Apple
CarPlay support and to see if
your phone is compatible, see
www.apple.com/ios/carplay/.
Apple or Google may change
or suspend availability at any
time. Android Auto, Android,
Google, Google Play, and other
marks are trademarks of
Google Inc.; Apple CarPlay is a
trademark of Apple Inc.
Press
{on the center stack to
exit Android Auto or Apple
CarPlay. To enter back into
Android Auto or Apple
CarPlay, press and hold
{on
the center stack.
Apple CarPlay and Android
Auto can be disabled from the
infotainment system. To do
this, touch Home, Settings,
and then touch the Apps tab
along the top of the display. Use the On/Off toggled to
turn off Apple CarPlay or
Android Auto.
Settings
Certain settings can be
managed in the Owner Center
sites when an account is
established, and may be
modified if other users have
accessed the vehicle or
created accounts. This may
result in changes to the
security or functionality of the
infotainment system. Some
settings may also be
transferred to a new vehicle,
if equipped. For instructions,
see Online Account
0438.
Refer to the User Terms and
Privacy Statement for
important details. To view,
touch the Settings icon on the
Home Page of the
infotainment display. The settings menu may be
organized into four categories.
Select the desired category by
touching System, Apps,
Vehicle, or Personal.
To access the personalization
menus:
1. Touch Settings on the Home Page on the
infotainment display.
2. Touch the desired category to display a list of
available options.
3. Touch to select the desired feature setting.
4. Touch the options on the infotainment display to
disable or enable a feature.
5. Touch
zto go to the top
level of the Settings menu.
System
The menu may contain the
following:
Time / Date
Allows setting of the clock.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Infotainment System 205
Downloading Over-the-Air
vehicle software updates
requires Internet connectivity,
which can be accessed
through the vehicle’s built-in
4G LTE connection,
if equipped and active.
If required, data plans are
provided by a third party.
Optionally, a secure Wi-Fi
hotspot such as a compatible
mobile device hotspot, home
hotspot, or public hotspot can
be used. Applicable data rates
may apply.
To connect the infotainment
system to a secured mobile
device hotspot, home hotspot,
or public hotspot, touch
Settings on the Home Page,
select the System tab,
followed by Wi-Fi Networks.
Select the appropriate Wi-Fi
network, and follow the
on-screen prompts. Download
speeds may vary.
On most compatible mobile
devices, activation of the Wi-Fi
hotspot is in the Settingsmenu under Mobile Network
Sharing, Personal Hotspot,
Mobile Hotspot, or similar.
Availability of Over-the-Air
software updates varies by
vehicle and country. Features
are subject to change. For
more information on this
feature, see Online Account
0
438.
Preferences
Allows the infotainment
system to disable or enable
the download of new updates
in the background.
About
Shows the infotainment
system software information.
Running Applications
Shows a complete list of
applications that are currently
running on the infotainment
system. Return to Factory Settings
Allows resetting the
infotainment system settings
in the vehicle.
Apps
The menu may contain the
following:
Android Auto
Allows interacting directly with
a mobile device on the
infotainment display. See
Apple CarPlay and Android
Auto
0201.
Apple CarPlay
This feature allows you to
interact directly with your
mobile device on the
infotainment display. See
Apple CarPlay and Android
Auto 0201.
Apps
Shows app settings and
information.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Infotainment System 207
Personal
If equipped, this menu allows
adjustment of different user
profile settings. See“Users”in
Using the System 0160 for
information on setting up user
profiles.
The menu may contain the
following:
Name
Touch to edit your user name
that will be displayed in the
vehicle.
Vehicle Account Information
Touch to view the vehicle
account information and to
change the account password.
An “unverified user account”
pop-up will display until the
account information
verification process has been
completed on the Internet.
Check your registered e-mail
account for an activation
e-mail to complete the
verification process. Profile Picture
Touch to choose or change
your profile picture.
Profile Identifiers
Touch to have the vehicle
recognize the identifier you
choose.
Touch Vehicle Key 1 and/or
Vehicle Key 2.
If the remote key is lost or
stolen, see your dealer.
Security
Touch to have your profile
secured with a PIN.
Touch No or Yes.
Vehicle Name
Touch to edit your
vehicle name.
Vehicle Account
Touch to view the vehicle
account information and to
change the account password.
Delete Profile
Touch to remove the profile
from the vehicle.
Touch Remove or Cancel.
Teen Driver
If equipped, this allows
multiple keys to be registered
for beginner drivers to
encourage safe driving habits.
When the vehicle is started
with a Teen Driver key, it will
automatically activate certain
safety systems, allow setting
of some features, and limit the
use of others. The Report
Card will record vehicle data
about driving behavior that
can be viewed later. When the
vehicle is started with a
registered key, the Driver
Information Center (DIC)
displays a message that Teen
Driver is active.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
210 Infotainment System
systems, touch Set Teen
Driver Speed Warning to set
the warning speed.
Set Teen Driver Speed
Warning :Choose the desired
speed warning level. The
speed warning does not limit
the speed of the vehicle.
SiriusXM Explicit Content
Filter : Allows the SiriusXM
Explicit Content Filter to be
turned ON or OFF. When ON,
the teen driver will not be able
to listen to SiriusXM stations
that contain explicit content,
and the Explicit Content Filter
selection in the Audio Settings
will be unavailable for change.
When Teen Driver is Active:
.If equipped, the radio will
mute when the driver seat
belt, and in some vehicles
the front passenger seat
belt, is not buckled. The
audio from any device paired
to the vehicle will also be
muted.
.An object placed on the
front passenger seat, such
as a briefcase, handbag,
grocery bag, laptop, or other
electronic device, could
cause the passenger
sensing system to falsely
sense an unbuckled front
passenger and mute the
radio. If this happens,
remove the object from the
seat. See Passenger
Sensing System 072.
.Some safety systems, such
as Automatic Emergency
Braking, if equipped, cannot
be turned off.
.The gap setting for Adaptive
Cruise Control and alert
timing for Forward Collision
Alert, if equipped, cannot be
changed.
.When trying to change a
safety feature that is not
configurable in Teen Driver,
the feature may be grayed
out or removed from the
infotainment menu, or the
DIC will display a message indicating that Teen Driver is
active and the action is not
available.
.Super Cruise, if equipped, is
not available.
.Enhanced Low Fuel Warning
(if equipped)
–When the
vehicle is low on fuel, the low
fuel light on the instrument
cluster flashes and the DIC
low fuel warning cannot be
dismissed.
.Do not tow a trailer if
equipped with Automatic
Emergency Braking.
Report Card
The vehicle owner must
secure the driver’s consent to
record certain vehicle data
when the vehicle is driven with
a registered Teen Driver key.
There is one Report Card per
vehicle. Data is only recorded
when a registered Teen Driver
key is used to operate the
vehicle.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
234 Driving and Operating
{Warning
When driving off-road,
bouncing and quick changes
in direction can easily throw
you out of position. This
could cause you to lose
control and crash. You and
your passengers should
always wear seat belts.
Before Driving Off-Road
.Have all necessary
maintenance and service
work completed.
.Fuel the vehicle, fill fluid
levels, and check inflation
pressure in all tires, including
the spare, if equipped.
.Read all the information
about AWD vehicles in this
manual.
.Make sure all underbody
shields, if equipped, are
properly attached.
.Know the local laws that
apply to off-road driving.To gain more ground
clearance if needed, it may be
necessary to remove the front
fascia lower air dam. However,
driving without the air dam
reduces fuel economy.
Caution
Operating the vehicle for
extended periods without
the front fascia lower air
dam installed can cause
improper airflow to the
engine. Reattach the front
fascia air dam after off-road
driving.
Loading the Vehicle for
Off-Road Driving
{Warning
.Unsecured cargo on the
load floor can be tossed
about when driving over
rough terrain. You or your
passengers can be struck
by flying objects. Secure
the cargo properly.
(Continued)
Warning (Continued)
.Keep cargo in the cargo
area as far forward and as
low as possible. The
heaviest things should be
on the floor, forward of
the rear axle.
.Heavy loads on the roof
raise the vehicle's center
of gravity, making it more
likely to roll over. You can
be seriously or fatally
injured if the vehicle rolls
over. Put heavy loads
inside the cargo area, not
on the roof.
For more information about
loading the vehicle, see
Vehicle Load Limits 0242.
Environmental Concerns
.Always use established
trails, roads, and areas that
have been set aside for
public off-road recreational
driving and obey all posted
regulations.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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246 Driving and Operating
Warning (Continued)
.Do not leave an
unsecured child
restraint in the vehicle.
.Secure loose items in
the vehicle.
.Do not leave a seat
folded down unless
needed.
Starting and
Operating
New Vehicle Break-In
Caution
The vehicle does not need
an elaborate break-in. But it
will perform better in the
long run if you follow these
guidelines:
.Do not drive at any one
constant speed, fast or
slow, for the first 800 km
(500 mi). Do not make(Continued)
Caution (Continued)
full-throttle starts. Avoid
downshifting to brake or
slow the vehicle.
.Avoid making hard stops
for the first 300 km
(200 mi) or so. During this
time the new brake linings
are not yet broken in. Hard
stops with new linings can
mean premature wear and
earlier replacement.
Follow this breaking-in
guideline every time you
get new brake linings.
.Do not tow a trailer during
break-in. See Trailer
Towing0318 for the
trailer towing capabilities
of the vehicle and more
information.
Following break-in, engine
speed and load can be
gradually increased.
On new vehicles, the various
mechanical and electrical
systems experience a “break-in”
period during the
first 6 400 km (4,000 mi) of
routine driving. As the vehicle
is driven, the mechanical
systems adjust to provide
optimal fuel economy and
transmission shift
performance.
Electrical systems will adapt
and calibrate during the
break-in period. A one-time
occurrence of clicks and
similar vehicle noises is normal
during this process.
Normal driving charges the
vehicle’s battery to achieve
the best operation of the
vehicle, including fuel economy
and the Stop/Start System.
See Stop/Start System 0249.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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252 Driving and Operating
2. Push plastic hooks back toengage grille slats. It is
recommended to start with
the lower hooks at the
center of the grille.
3. Repeat for all hooks to fully engage cover to grille.
For vehicles equipped with
a front license plate
bracket, only the outer
clips will be engaged on
the upper row. Ensure the
top center portion of the
cover is positioned
securely behind the license
plate bracket. 4. Make sure all clips remain
engaged during
installation. Cover should
be stretched to a tight fit
when properly installed.
Engine Heater
The engine heater, if available,
can help in cold weather
conditions at or below
−18 °C (0 °F) for easier starting
and better fuel economy
during engine warm-up. Plug in
the engine heater at least four
hours before starting the
vehicle. An internal thermostat
in the plug end of the cord will
prevent engine heater
operation at temperatures
above −18 °C (0 °F).
{Warning
Do not plug in the engine
block heater while the
vehicle is parked in a garage
or under a carport. Property
damage or personal injury
may result. Always park the
(Continued)
Warning (Continued)
vehicle in a clear open area
away from buildings or
structures.
To Use the Engine Heater
1. Turn off the engine.
2. Open the hood and unwrapthe electrical cord. The
cord is located on the
passenger side of the
compartment near the air
cleaner/filter.