ECU CADILLAC CT4 2023 Owners Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
8 Keys, Doors, and Windows
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Key . . . . . . . . . . . . . . . . . . . . . 9
Remote Key Operation . . . . . . 9
Remote Vehicle Start . . . . . . . 16
Door Locks . . . . . . . . . . . . . . . . . . . . 18
Power Door Locks . . . . . . . . . . 20
Delayed Locking . . . . . . . . . . . . . 20
Automatic Door Locks . . . . . . 21
Lockout Protection . . . . . . . . . 21
Safety Locks . . . . . . . . . . . . . . . . . . 22
Doors
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Vehicle Security
Vehicle Security . . . . . . . . . . . . . 24
Vehicle Alarm System . . . . . . 24
Immobilizer . . . . . . . . . . . . . . . . . . . . 27
Immobilizer Operation . . . . . . 27
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . 28
Power Mirrors . . . . . . . . . . . . . . . . 28
Folding Mirrors . . . . . . . . . . . . . . . 29
Heated Mirrors . . . . . . . . . . . . . . 30Automatic Dimming
Mirror . . . . . . . . . . . . . . . . . . . . . . . . . 30
Reverse Tilt Mirrors . . . . . . . . 30
Interior Mirrors
Interior Rearview Mirrors . . . . . . . . . . . . . . . . . . . . . . . . 31
Manual Rearview Mirror . . . 31
Automatic Dimming Rearview Mirror . . . . . . . . . . . . 31
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . 31
Power Windows . . . . . . . . . . . . . . 31
Sun Visors . . . . . . . . . . . . . . . . . . . . . 33
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 34
Keys and Locks
Keys
{Warning
Leaving children in a vehicle
with a remote key is
dangerous and children or
others could be seriously
injured or killed. They could
operate the power windows
or other controls or make
the vehicle move. The
windows will function with
the remote key in the
vehicle, and children or
others could be caught in
the path of a closing
window. Do not leave
children in a vehicle with a
remote key.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
14 Keys, Doors, and Windows
Mechanical Key Access
To access a vehicle with a
weak remote key battery, see
Door Locks018.
Programming Remote
Keys to the Vehicle
Only remote keys programmed
to the vehicle will work. If a
remote key is lost or stolen, a
replacement can be purchased
and programmed through your
dealer. The vehicle can be
reprogrammed so that lost or
stolen remote keys no longer
work. Each vehicle can have
up to eight remote keys
matched to it.
Starting the Vehicle with a
Low Remote Key Battery
For improved vehicle security,
the remote key is equipped
with a motion sensor. When
starting the vehicle, if the
remote key has been idle for a
while, the DIC may display KEY
IN SLEEP MODE, MOVE KEY,
THEN START. Move the remote key slightly and try
starting the vehicle. When
starting the vehicle, if the
remote key battery is depleted
or there is signal interference,
the DIC may display NO KEY
FOUND, REPLACE BATTERY
IN KEY or NO REMOTE KEY
WAS DETECTED PLACE KEY
IN KEY POCKET THEN START
YOUR VEHICLE, follow the
steps shown below:
1. Place the remote key into
the rear cupholder. 2. With the vehicle in P (Park)
or N (Neutral) press the
brake pedal and ENGINE
START/STOP.
Replace the remote key
battery as soon as
possible.
Battery Replacement
{Warning
Never allow children to play
with the remote key. The
remote key contains a small
battery, which can be a
choking hazard. If swallowed,
internal burns can occur,
resulting in severe injury or
death. Seek medical
attention immediately if a
battery is swallowed.
{Warning
To avoid personal injury, do
not touch metal surfaces on
the remote key when it has
been exposed to extreme
(Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
20 Keys, Doors, and Windows
3. Slide the cap forward andpress the forward edge to
install the cap in place.
4. Release the door handle. 5. Check that the cap is
secure.
Free-Turning Locks
The door key lock cylinder
turns freely when either the
wrong key is used, or the
correct key is not fully
inserted. The free-turning
door lock feature prevents the
lock cylinder from being forced
open. To reset the lock
cylinder, ensure the correct
key is fully inserted into the
lock cylinder. Rotate the key
until you feel the lock cylinder
click back into place. Remove
the key and reinsert fully,
rotate the key to unlock the
vehicle.
Power Door Locks
Q: Press to lock the doors.
The indicator light in the
switch will illuminate when
locked.
K: Press to unlock the doors.
If equipped, the fuel door is
also locked or unlocked using
these features.
Delayed Locking
This feature delays the actual
locking of the doors until
five seconds after all doors
are closed.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
24 Keys, Doors, and Windows
closing the trunk; this will
cause the trunk lid to be
unlatched.
The trunk has an electric latch.
If the vehicle has lost power or
the battery is disconnected,
the trunk will not open. If this
happens, enter the rear
compartment by folding the
rear seats down, and pull the
emergency release handle to
open the trunk.
Emergency Trunk Release
HandleCaution
Do not use the emergency
trunk release handle as a
tie-down or anchor point
when securing items in the
trunk as it could damage the
handle.
There is a glow-in-the-dark
emergency trunk release
handle on the trunk lid. This
handle will glow following
exposure to light. Pull the
release handle to open the
trunk from the inside.Vehicle Security
This vehicle has
theft-deterrent features;
however, they do not make
the vehicle impossible to steal.
Vehicle Alarm System
This vehicle has an anti-theft
alarm system.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Keys, Doors, and Windows 25
The indicator light, on the
instrument panel near the
windshield, indicates the
status of the system.
Off :Alarm system is
disarmed.
On Solid : Vehicle is secured
during the delay to arm the
system.
Fast Flash : Vehicle is
unsecured. A door, the hood,
or the trunk is open.
Slow Flash : Alarm system is
armed.
Arming the Alarm System
1. Turn off the vehicle.
2. Lock the vehicle in one of three ways:
.Use the remote key.
.Use the Keyless Access
system.
.With a door open, press
Qon the interior of
the door.
3. After 30 seconds the alarm system will arm, and
the indicator light will begin
to slowly flash indicating
the alarm system is
operating. Pressing
Qon
the remote key a second
time will bypass the
30-second delay and
immediately arm the alarm
system.
The vehicle alarm system will
not arm if the doors are locked
with the mechanical key.
If the driver door is opened
without first unlocking with
the remote key, the horn will chirp and the lights will flash
to indicate pre-alarm. If the
vehicle is not started, or the
door is not unlocked by
pressing
Kon the remote key
during the 10-second
pre-alarm, the alarm will be
activated.
The alarm will also be
activated if a passenger door,
the trunk, or the hood is
opened without first disarming
the system. When the alarm is
activated, the turn signals
flash and the horn sounds for
about 30 seconds. The alarm
system will then re-arm to
monitor the next unauthorized
event.
Disarming the Alarm
System
To disarm the alarm system or
turn off the alarm if it has
been activated:
.PressKon the remote key.
.Unlock the vehicle using the
Keyless Access system.
.Start the vehicle.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
26 Keys, Doors, and Windows
To avoid setting off the alarm
by accident:
.Lock the vehicle after all
occupants have left the
vehicle and all doors are
closed.
.Always unlock a door with
the remote key or use the
Keyless Access system.
Unlatching the driver door
with the mechanical key will
not disarm the system or turn
off the alarm.
How to Detect a Tamper
Condition
IfKis pressed on the remote
key and the horn chirps and
the lights flash three times, a
previous alarm occurred while
the system was armed.
If the alarm has been
activated, a message will
appear on the DIC.
Power Sounder,
Inclination Sensor, and
Intrusion Sensor
In addition to the standard
theft-deterrent system
features, this system may also
have a power sounder,
inclination sensor, and
intrusion sensor.
The power sounder provides
an audible alarm which is
distinct from the vehicle’s
horn. It has its own power
source, and can sound an
alarm if the vehicle’s battery is
compromised.
The inclination sensor can set
off the alarm if it senses
movement of the vehicle, such
as when a tire is removed.
Make sure the vehicle's alarm
is not armed prior to any
jacking. The intrusion sensor monitors
the vehicle interior, and can
activate the alarm if it senses
unauthorized entry into the
vehicle's interior. Do not allow
passengers or pets to remain
in the vehicle when the
intrusion sensor is activated.
Before arming the
theft-deterrent system and
activating the intrusion sensor:
.Make sure all doors and
windows are completely
closed.
.Secure any loose items such
as sun glasses.
.Make sure there are no
obstructions blocking the
sensors in the front
overhead console.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Keys, Doors, and Windows 27
Inclination and Intrusion
Sensor Disable Switch
It is recommended that the
intrusion and inclination
sensor be deactivated if pets
are left in the vehicle or the
vehicle is being transported.
With the vehicle turned off,
press
oin the front
overhead console. The
indicator light will come on
momentarily, indicating that
these sensors have been
disabled for the next alarm
system arming cycle.
Immobilizer
See Radio Frequency
Statement 0494.
Immobilizer Operation
This vehicle has a passive
theft-deterrent system.
The system does not have to
be manually armed or
disarmed.
The vehicle is automatically
immobilized when the vehicle
is turned off.
The immobilization system is
disarmed when the ignition is
turned on or to accessory
mode and a valid remote key is
present in the vehicle.
The security light, in the
instrument cluster, comes on if
there is a problem with arming
or disarming the
theft-deterrent system.
The system has one or more
remote keys matched to an
immobilizer control unit in the
vehicle. Only a correctly
matched remote key will start
the vehicle. If the remote key
is ever damaged, you may not
be able to start your vehicle.
When trying to start the
vehicle, the security light may
come on briefly.
If the engine does not start
and the security light stays on,
there is a problem with the
system. Turn the ignition off
and try again.
If the vehicle will not change
ignition modes (accessory
mode, on, off), and the remote
key appears to be undamaged,
try another remote key. Or,
you may try placing the

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
36 Seats and Restraints
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . 37
Front Seats
Power Seat Adjustment . . . 38
Thigh SupportAdjustment . . . . . . . . . . . . . . . . . . 39
Reclining Seatbacks . . . . . . . . 39
Lumbar Adjustment . . . . . . . . 40
Massage . . . . . . . . . . . . . . . . . . . . . . . . 41
Memory Seats . . . . . . . . . . . . . . . . 41
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . 45
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . 47
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . 49
Buckle To Drive . . . . . . . . . . . . . . 50
How to Wear Seat BeltsProperly . . . . . . . . . . . . . . . . . . . . . . . 51
Lap-Shoulder Belt . . . . . . . . . . 54
Seat Belt Use During Pregnancy . . . . . . . . . . . . . . . . . . . 57
Seat Belt Extender . . . . . . . . . 57
Safety System Check . . . . . . 57 Seat Belt Care . . . . . . . . . . . . . . . 58
Replacing Seat Belt
System Parts after a
Crash . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Airbag System
Airbag System . . . . . . . . . . . . . . . 59
Where Are the Airbags? . . . 61
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . . . 62
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . 63
How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . . 64
What Will You See after an Airbag Inflates? . . . . . . . . 64
Passenger Sensing
System . . . . . . . . . . . . . . . . . . . . . . . 66
Servicing the Airbag-Equipped
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . 70
Adding Equipment to the Airbag-Equipped
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . 70
Airbag System Check . . . . . . . 71
Replacing Airbag System Parts after a Crash . . . . . . . 72
Child Restraints
Older Children . . . . . . . . . . . . . . . . 72
Infants and YoungChildren . . . . . . . . . . . . . . . . . . . . . . . 74
Child Restraint Systems . . . 77
Where to Put the Restraint . . . . . . . . . . . . . . . . . . . . . 79
Lower Anchors and Tethers for Children
(LATCH System) . . . . . . . . . . . 80
Replacing LATCH System Parts After a Crash . . . . . . . 87
Securing Child Restraints (With the Seat Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . . 88
Securing Child Restraints (With the Seat Belt in the
Front Seat) . . . . . . . . . . . . . . . . . . 90

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Seats and Restraints 49
To raise a seatback:1. Lift the seatback up. Make sure the center seat belt
and latch do not get
trapped behind the seat.
Push the seatback
rearward to lock it in place.
A red tab near the
seatback lever retracts
when the seatback is
locked in place.
2. Push and pull the top of the seatback to be sure it
is locked into position.
3. Reconnect the center seat belt mini-latch to the
mini-buckle. Do not let the
belt twist.
4. Pull on the center seat belt to make sure the mini-latch
is secure.
5. Repeat the steps to raise the other seatback,
if necessary.
When the seat is not in use, it
should be kept in the upright,
locked position.Seat Belts
This section describes how to
use seat belts properly, and
some things not to do.
{Warning
Do not let anyone ride
where a seat belt cannot be
worn properly. In a crash,
if you or your passenger(s)
are not wearing seat belts,
injuries can be much worse
than if you are wearing seat
belts. You can be seriously
injured or killed by hitting
things inside the vehicle
harder or by being ejected
from the vehicle. In addition,
anyone who is not buckled
up can strike other
passengers in the vehicle.
It is extremely dangerous to
ride in a cargo area, inside or
outside of a vehicle. In a
collision, passengers riding
in these areas are more (Continued)
Warning (Continued)
likely to be seriously injured
or killed. Do not allow
passengers to ride in any
area of the vehicle that is
not equipped with seats and
seat belts.
Always wear a seat belt, and
check that all passenger(s)
are restrained properly too.
This vehicle has indicators as
a reminder to buckle the seat
belts. See Seat Belt
Reminders 0115.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Seats and Restraints 55
again. If the locking feature
stays engaged after letting
the belt go back to stowed
position on the seat, move
the seat rearward or
recline the seat until the
shoulder belt retractor
lock releases.
If the webbing locks in the
latch plate before it
reaches the buckle, tilt the
latch plate flat to unlock.
4. Push the latch plate intothe buckle until it clicks.
Pull up on the latch plate
to make sure it is secure.
If the belt is not long
enough, see Seat Belt
Extender 057.
Position the release button
on the buckle so that the
seat belt could be quickly
unbuckled if necessary.5. To make the lap part tight, pull up on the
shoulder belt.
It may be necessary to pull
the webbing firmly,
through the adjustable
stop, or move the
adjustable stop along the
webbing toward the
outboard floor anchor, to
fully tighten the lap belt
across the lap.