ignition CADILLAC CT4 2022 Workshop Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
258 DRIVING AND OPERATING
Turning the Systems Off and On
Caution
Do not repeatedly brake or
accelerate heavily when TCS is off.
The vehicle driveline could be
damaged.
To turn off only TCS, press and
release
g. The traction off lighti
displays in the instrument cluster.
A DIC message may display.
To turn TCS on again, press and
release
g. The traction off lighti
displayed in the instrument cluster
will turn off. If TCS is limiting wheel spin when
g
is pressed, the system will not turn off
until the wheels stop spinning.
To turn off both TCS and StabiliTrak/
ESC, press and hold
guntil the
traction off light
iand StabiliTrak/
ESC OFF light
gcome on and stay on
in the instrument cluster. A DIC
message may display.
To turn TCS and StabiliTrak/ESC on
again, press and release
g. The
traction off light
iand StabiliTrak/
ESC OFF light
gin the instrument
cluster turn off.
Adding accessories can affect the
vehicle's performance. See Accessories
and Modifications 0323.
Driver Mode Control
Driver Mode Control (DMC) allows the
driver to adjust the overall driving
experience to better suit driver
preference by adjusting vehicle
systems to fit specific driving needs.
Drive mode availability and affected vehicle systems are dependent on
vehicle trim level, region, and optional
features.
If the vehicle is in Tour Mode or My
Mode, it will stay in that mode
through future ignition cycles. If the
vehicle is in any other mode, it will
return to Tour Mode when the vehicle
is restarted. When a mode is selected,
an indicator will come on in the
instrument cluster and stay on.
Mode Activation
Driver Mode Control Switch for
Automatic Transmission

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
DRIVING AND OPERATING 269
going downhill, the cruise control
system may automatically brake to
slow the vehicle down. Also, you may
have to brake or shift to a lower gear
to keep your speed down. If the brake
pedal is applied, cruise control
disengages.
Ending Cruise Control
There are five ways to end cruise
control:
.Step lightly on the brake pedal.
.Press*.
.Shift the transmission to
N (Neutral).
.Press the clutch pedal for several
seconds or shift to Neutral (manual
transmissions).
.PressJ.
Erasing Speed Memory
The cruise control set speed is erased
from memory if
Jis pressed or if the
ignition is turned off.
Adaptive Cruise Control
(Advanced)
If equipped, Adaptive Cruise Control
(ACC) allows the cruise control set
speed and following gap to be
selected. Read this entire section
before using this system. The
following gap is the following time
between your vehicle and a vehicle
detected directly ahead in your path,
moving in the same direction. If no
vehicle is detected in your path, ACC
works like regular cruise control. ACC
uses camera and radar sensors. See
Radio Frequency Statement 0438.
If a vehicle is detected in your path,
ACC can speed up the vehicle or apply
limited, moderate braking to maintain
the selected following gap. To
disengage ACC, apply the brake. If the
Traction Control System (TCS) or
StabiliTrak/Electronic Stability Control
(ESC) system activates while ACC is
engaged, ACC may automatically
disengage. See Traction Control/
Electronic Stability Control 0257. When
road conditions allow ACC to be safely
used, ACC can be turned back on. ACC will not engage if the TCS or
StabiliTrak/ESC electronic stability
control system is disabled.
ACC can reduce the need for you to
frequently brake and accelerate,
especially when used on expressways,
freeways, and interstate highways.
When used on other roads, you may
need to take over the control of
braking or acceleration more often.
{Warning
ACC has limited braking ability and
may not have time to slow the
vehicle down enough to avoid a
collision with another vehicle you
are following. This can occur when
vehicles suddenly slow or stop
ahead, or enter your lane. Also see
“Alerting the Driver”
in this section.
Complete attention is always
required while driving and you
should be ready to take action and
apply the brakes. See Defensive
Driving 0210.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
276 DRIVING AND OPERATING
A DIC warning message may display
indicating to shift to P (Park) before
exiting the vehicle.
{Warning
If ACC has stopped the vehicle, and
if ACC is disengaged, turned off,
or canceled, the vehicle will no
longer be held at a stop. The vehicle
can move. When ACC is holding the
vehicle at a stop, always be
prepared to manually apply the
brakes.
{Warning
Leaving the vehicle without placing
it in P (Park) can be dangerous. Do
not leave the vehicle while it is
being held at a stop by ACC. Always
place the vehicle in P (Park) and
turn off the ignition before leaving
the vehicle.
ACC Override
If using the accelerator pedal while
ACC is active, the ACC indicator turns
blue on the instrument cluster and in the HUD (if equipped) to indicate that
automatic braking will not occur. ACC
will resume operation when the
accelerator pedal is not being pressed.
{Warning
The ACC will not automatically
apply the brakes if your foot is
resting on the accelerator pedal.
You could crash into a vehicle
ahead of you.
Curves in the Road
{Warning
On curves, ACC may not detect a
vehicle ahead in your lane. You
could be startled if the vehicle
accelerates up to the set speed,
especially when following a vehicle
exiting or entering exit ramps. You
could lose control of the vehicle or
crash. Do not use ACC while driving
on an entrance or exit ramp. Always
be ready to use the brakes if
necessary.
{Warning
On curves, ACC may respond to a
vehicle in another lane, or may not
have time to react to a vehicle in
your lane. You could crash into a
vehicle ahead of you, or lose control
of your vehicle. Give extra attention
in curves and be ready to use the
brakes if necessary. Select an
appropriate speed while driving in
curves.
ACC may operate differently in a
sharp curve. It may reduce the vehicle
speed if the curve is too sharp.
If equipped, the curve speed control
indicator
nmay illuminate green
when ACC is actively controlling the
vehicle speed and detects a sharp
curve on the road ahead.
ACC automatically slows the vehicle
down while navigating the curve and
may increase speed out of the curve,
but will not exceed the set speed.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
278 DRIVING AND OPERATING
Erasing Speed Memory
The ACC set speed is erased from
memory if
Jis pressed or if the
ignition is turned off.
Weather Conditions Affecting ACC
System operation may be limited
under snow, heavy rain, or road spray
conditions.
Accessory Installations and Vehicle
Modifications
Do not install or place any object
around the front camera windshield
area that would obstruct the front
camera view.
Do not install objects on top of the
vehicle that overhang and obstruct the
front camera, such as a canoe, kayak,
or other items.
Do not modify the hood, headlamps,
or fog lamps, as this may limit the
camera’s ability to detect an object.
Cleaning the Sensing System
The camera sensor on the windshield
behind the rearview mirror and the
radar sensors on the front of the
vehicle can become blocked by snow, ice, dirt, or mud. These areas need to
be cleaned for ACC to operate
properly.
If ACC will not operate, regular Cruise
Control may be available. See
“Switching Between ACC and Regular
Cruise Control
”previously in this
section. Always consider driving
conditions before using either cruise
control system.
For cleaning instructions, see
“Washing the Vehicle ”under Exterior
Care 0397.
System operation may also be limited
under snow, heavy rain, or road spray
conditions.
Super Cruise
If equipped, Super Cruise can steer to
maintain lane position under certain
conditions on Super Cruise-enabled
roads that are separated from
opposing traffic.
Super Cruise can also steer to perform
a lane change under certain
conditions on Super Cruise-enabled
roads. A lane change can be initiated by the
driver using the turn signal lever. The
Super Cruise System may initiate a
lane change maneuver in the
following scenarios:
.To pass slower traffic
.When the current lane is ending
ahead
.To return to the initial lane
See “Super Cruise Lane Change ”later
in this section and Turn and
Lane-Change Signals 0131.
{Warning
Super Cruise can only assist to
maintain lane position, or steer to
change lanes, when driving on
compatible roads. You must
supervise the driving task and
monitor the road conditions. You
may need to respond to traffic
events by steering, braking,
or accelerating. See Defensive
Driving.
Super Cruise is:
.Not a self-driving system
(Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
286 DRIVING AND OPERATING
First Alert
.If the steering wheel light bar flashes green, the system has detected that your head and
eyes may not be directed toward the road.
.The flashing will stop when the system detects that your head and eyes appear to be
directed toward the road.
Second Alert
.If the steering wheel light bar flashes green for too long, Super Cruise will alert the driver
to take control of steering immediately by flashing the light bar red. Also, either beeps will
sound or the Safety Alert Seat will vibrate. See “Collision/Detection Systems”underVehicle
Personalization 0120.
.Take over steering, then Super Cruise will disengage.
.To re-engage Super Cruise, press]. See “Using Super Cruise ”previously in this section.
Third Alert
.If the steering wheel light bar flashes red for too long, a voice command will tell you to
take control of the vehicle.
.Take control of the steering immediately; ACC and Super Cruise will disengage.
.A DIC message will indicate that Super Cruise is locked out. Super Cruise cannot be
re-engaged until the next ignition cycle.
.Continued failure to take over steering will cause the vehicle to brake to a stop and OnStar
will be called. The brake lamps and hazard warning flashers will come on.
.Take control of the vehicle and continue driving.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
292 DRIVING AND OPERATING
Super Cruise Message Summary (cont'd)
Unavailable Press OnStar Button.The owner’s required Connected Services subscription
may have ended.
.There may be poor GPS reception (e.g., in isolated
areas).
.The GPS reception may be blocked by objects such as
tall buildings or other large structures.
.Press the Blue OnStar button in your vehicle to speak
with an OnStar representative, who can help determine
the issue and what actions to take.
Unavailable You Have Taken Vehicle Control
.The brake pedal is being pressed.
.The Adaptive Cruise Control has been canceled or
turned off.
Unavailable Sensor Blocked Clear snow, ice, dirt, or other contaminants from the front and rear areas of the vehicle.
Unavailable Sharp Curve Some curves are too sharp to be navigated by the Super Cruise system. Super Cruise will be available after the curve
is traveled.
Super Cruise Unavailable Super Cruise is unavailable for reasons not described in other messages.
Super Cruise Locked Out See Owner’s Manual The driver did not take control of the vehicle when prompted by the Super Cruise system. The Super Cruise
system will be disabled until the ignition is turned off and
back on.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
VEHICLE CARE 341
surge tank, but be sure the cooling
system, including the coolant surge
tank pressure cap, is cool before you
do it.
2.0L L4 Engine and 3.6L
V6 Engine
Automatic Coolant Service Fill
Instructions
The vehicle is equipped with a service
feature that assists with filling and
removing air from the cooling system
after service of components or when
coolant is added after being to low.To use this feature:1. With a cold system, add coolant to
the indicated line on the
surge tank.
2. Replace the pressure cap on the surge tank.
3. Activate the service feature: 3.1. Connect the vehicle to a battery charger.
3.2. Turn the ignition to Service Mode. See Ignition Positions
0 232.
3.3. Turn off the air conditioning.
3.4. Set the parking brake. 3.5. At the same time, press the
accelerator and the brake
pedal for two seconds, then
release.
3.6. At the end of the cycle, check the coolant level in the surge
tank and add coolant if it is
below the indicated line. Turn
the ignition off, allow the
Electronic Control Module
(ECM) to go to sleep, about
two minutes, and repeat
Steps 3.2 –3.6.
Listen for pump activation and
movement of the control valves while
watching the level of the coolant in
the surge tank. If the tank empties,
turn the ignition off, carefully remove
the pressure cap, refill to the indicated
line, replace the pressure cap, and
repeat steps 3.2 –3.6.
The fill and air removal process will
run for approximately 15 minutes.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
342 VEHICLE CARE
Caution
If the pressure cap is not tightly
installed, coolant loss and engine
damage may occur. Be sure the cap
is properly and tightly secured.
2.7L L4 Engine
Automatic Coolant Service Fill
Instructions
The vehicle is equipped with a service
feature that assists with filling and
removing air from the cooling system
after service of components or when
coolant is added after being to low.
To use this feature:1. With a cold system unscrew the cooling system air bleeder cap.
If coolant can be seen through the
bleeder move to Step 3.
2. Add coolant through the surge tank until it is visible through the air
bleeder.
3. Replace the cooling system air bleeder cap.
4. Add coolant to the indicated line on the surge tank. 5. Replace the pressure cap on the
surge tank.
6. Activate the service feature: 6.1. Connect the vehicle to a battery charger.
6.2. Turn the ignition to Service Mode. See Ignition Positions
0 232.
6.3. Turn off the air conditioning.
6.4. Set the parking brake.
6.5. At the same time, press the accelerator and the brake
pedal for two seconds, then
release.
6.6. At the end of the cycle, check the coolant level in the surge
tank and add coolant if it is
below the indicated line. Turn
the ignition off, carefully
remove the pressure cap, refill
to the indicated line, replace
the pressure cap, and repeat
steps 6.2 –6.6.
Listen for pump activation and
movement of the control valves while
watching the level of the coolant in
the surge tank. If the tank empties,
turn the ignition off, carefully remove the pressure cap, refill to the indicated
line, replace the pressure cap, and
repeat steps 6.2
–6.6.
The fill and air removal process will
run for approximately 15 minutes.
Caution
If the pressure cap is not tightly
installed, coolant loss and engine
damage may occur. Be sure the cap
is properly and tightly secured.
Engine Overheating
The vehicle has an indicator to warn
of the engine overheating.
If the decision is made not to lift the
hood when this warning appears, get
service help right away. See Roadside
Service 0432.
If the decision is made to lift the
hood, make sure the vehicle is parked
on a level surface.
Then check to see if the engine
cooling fan is running. If the engine is
overheating, the fan should be

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
VEHICLE CARE 347
How to Reset the Brake Pad Life
System
The system will automatically detect
when significantly worn brake pads
are replaced. When the ignition is
turned on after new pads and wear
sensors are installed, a message will
display. Follow the prompts to reset
the system.
The brake pad life system can also be
manually reset:1. Display Brake Pad Life on the DIC. See Driver Information Center (DIC)
(Base Level) 0109 or
Driver Information Center (DIC)
(Uplevel) 0112.
2. Select the Brake Pad Life menu.
3. Select front or rear pads as appropriate.
4. Select YES on the confirmation message. Repeat for the pads on
the other axle if they were also
replaced.
How to Disable the Brake Pad
Life System
The brake pad life system can be
turned off. This may be necessary if
aftermarket brake pads without wear
sensors are installed. When the
system is turned off, the front and
rear brake pad life percentages will
not display. However, the built-in wear
indicators that make a high-pitched
warning sound when the brake pads
are worn can still determine when the
pads should be replaced. See Brakes
0 344.
To turn off the brake pad life system: 1. Display Brake Pad Life on the DIC. See Driver Information Center (DIC)
(Base Level) 0109 or
Driver Information Center (DIC)
(Uplevel) 0112.
2. Select the Brake Pad Life menu.
3. Select DISABLE.
To turn the brake pad life system back
on, follow the above steps but select
ENABLE in Step 2.
Brake Pad Sensor System
(V-Series Blackwing)
The V-Series Blackwing has electronic
brake pad wear sensors, when the
brake pads need to be replaced, a
message displays in the Driver
Information Center (DIC).
When the message displays, install
new brake pads and brake pad wear
sensors on the vehicle.
When the ignition is turned on after
new brake pads and brake pad wear
sensors are installed, the message
should no longer display.
The brake pad sensor system can only
be reset by replacing the brake pads
and brake pad wear sensors.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
354 VEHICLE CARE
Replacing a Blown Fuse
1. Turn off the ignition.
2. Locate the fuse puller in the enginecompartment fuse block.
3. Use the fuse puller to remove thefuse from the top or side, as shown
above.
4. If the fuse must be replaced immediately, borrow a replacement
fuse with the same amperage from
the fuse block. Choose a vehicle
feature that is not needed to safely
operate the vehicle. Repeat
Steps 2-3.
5. Insert the replacement fuse into the empty slot of the blown fuse.
At the next opportunity, see your
dealer to replace the blown fuse.