2021 CADILLAC CT4 sensor

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
118 INSTRUMENTS AND CONTROLS
.Visualization
My Mode
Touch and the following may display:
.Engine Sound
.Steering
.Suspension
.Brake Feel
For information on the range of
settings, see “Driver Mode
Customization ”in Driver Mode Control
0 241.
V-Mode
Touch and the following may display:
.Engine Sound
.Steering
.Suspension
.Brake Feel
.Powertrain
For information on the range of
settings, see “Driver Mode
Customization ”in Driver Mode Control
0 241. Visualization
This setting shows handling and
performance settings on the
infotainment display when changing
drive modes.
Touch Off or On.
Climate and Air Quality
Touch and the following may display:
.Auto Fan Speed
.Air Quality Sensor
.Auto Cooled Seats
.Auto Heated Seats
.Auto Defog
.Auto Rear Defog
.Ionizer
Auto Fan Speed
This setting specifies the amount of
airf low when the climate control fan
setting is Auto Fan.
Touch Low, Medium, or High.
Air Quality Sensor
This setting switches the system into
Recirculation Mode based on the
quality of the outside air. Touch Off, Low Sensitivity, or High
Sensitivity.
Auto Cooled Seats
This setting automatically turns on
and regulates the ventilated seats
when the cabin temperature is warm.
See
Heated and Ventilated Front Seats
0 37.
Touch Off or On.
Auto Heated Seats
This setting automatically turns on
and regulates the heated seats when
the cabin temperature is cool. The
auto heated seats can be turned off by
using the heated seat buttons on the
center stack. See Heated and Ventilated
Front Seats 037.
If equipped with auto heated steering
wheel, this feature will turn on when
the auto heated seats turn on.
Touch Off or On.
Auto Defog
This setting automatically turns the
front defogger on when the engine is
started.
Touch Off or On.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
LIGHTING 127
Turning On and Enabling IntelliBeam
To enable the IntelliBeam system,
press
bon the turn signal lever
when it is dark outside and the
exterior lamp control is in AUTO
or
2.
Driving with IntelliBeam
The system only activates the high
beams when driving over 40 km/h
(25 mph).
The blue high-beam on light appears
on the instrument cluster when the
high beams are on. There is a sensor near the top center
of the windshield that automatically
controls the system. Keep this area of
the windshield clear of debris to allow
for best system performance.
The high-beam headlamps remain on,
under the automatic control, until one
of the following situations occurs:
.The system detects an approaching
vehicle's headlamps.
.The system detects a preceding
vehicle's taillamps.
.The outside light is bright enough
that high-beam headlamps are not
required.
.The vehicle's speed drops below
20 km/h (12 mph).
.The IntelliBeam system is disabled
by the button on the turn signal
lever. If this happens, press
bon
the turn signal lever when the
exterior lamp control is in the
AUTO or
2position to reactivate
the IntelliBeam system. The
instrument cluster light will come
on to indicate the IntelliBeam
system is reactivated. The high beams may not turn off
automatically if the system cannot
detect another vehicle's lamps because
of any of the following:
.The other vehicle's lamps are
missing, damaged, obstructed from
view, or otherwise undetected.
.The other vehicle's lamps are
covered with dirt, snow, and/or road
spray.
.The other vehicle's lamps cannot be
detected due to dense exhaust,
smoke, fog, snow, road spray, mist,
or other airborne obstructions.
.The vehicle's windshield is dirty,
cracked, or obstructed by something
that blocks the view of the light
sensor.
.The vehicle is loaded such that the
front end points upward, causing
the light sensor to aim high and not
detect headlamps and taillamps.
.The vehicle is being driven on
winding or hilly roads.
The automatic high-beam headlamps
may need to be disabled if any of the
above conditions exist.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
128 LIGHTING
Exterior Lamps Off
Reminder
A warning chime sounds if the driver
door is opened while the ignition is off
and the exterior lamps are on.
Headlamp High/Low-Beam
Changer
3:Push the turn signal lever away
from you and release, to turn the high
beams on. To return to low beams,
push the lever again or pull it toward
you and release.
This indicator light turns on in the
instrument cluster when the
high-beam headlamps are on.
Flash-to-Pass
To flash the high beams, pull the turn
signal lever toward you, and release.
Daytime Running
Lamps (DRL)
DRL can make it easier for others to
see the front of your vehicle during
the day. Fully functional DRL are
required on all vehicles first sold in
Canada.
If equipped, the DRL will come on
when all of the following conditions
are met:
.The ignition is on.
.The exterior lamp control is
in AUTO.
.The light sensor determines it is
daytime.
The DRL turn off when the headlamps
are turned to
Oor the ignition is off.
For vehicles first sold in Canada, the
DRL can only be turned off when the
vehicle is parked.
Automatic Headlamp
System
When the exterior lamp control is set
to AUTO and it is dark enough
outside, the headlamps come on
automatically.
The light sensor is on top of the
instrument panel or on the windshield
near the rearview mirror. Do not cover
the sensor, otherwise the headlamps
will come on when they are not
needed.
The system may also turn on the
headlamps when driving through a
parking garage or tunnel.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
182 INFOTAINMENT SYSTEM
.Air Quality Sensor: This setting
switches the system into
Recirculation Mode based on the
quality of the outside air.
Touch Off, Low Sensitivity, or High
Sensitivity.
.Auto Cooled Seats: This setting
automatically turns on and
regulates the ventilated seats when
the cabin temperature is warm.
Touch the controls on the
infotainment display to disable or
enable.
.Auto Heated Seats: This setting
automatically turns on and
regulates the heated seats when the
cabin temperature is cool. The auto
heated seats can be turned off by
using the heated seat controls on
the center stack.
Touch the controls on the
infotainment display to disable or
enable.
.Auto Defog: This setting
automatically turns the front
defogger on when the vehicle engine
is started.Touch the controls on the
infotainment display to disable or
enable.
.Auto Rear Defog: This setting
automatically turns the rear
defogger on when the vehicle engine
is started.
Touch the controls on the
infotainment display to disable or
enable.
.Ionizer: This setting purifies the air
in the interior of the vehicle..
Touch the controls on the
infotainment display to disable or
enable.
Navigation
Touch and the following may display:
.Destination Card Preferences
.Map Preferences
.Route Preferences
.Navigation Voice Control
.Traffic Preferences
.Alert Preferences
.Fuel Grade Preferences
.Manage History
.Predictive Navigation (if equipped)
.About See
Using the Navigation System 0150.
Phone
Touch and the following may display:
.My Number: Displays the cell phone
number of the Bluetooth connected
device.
.Active Call View: Shows active call
display when answering a call.
Touch the controls on the
infotainment display to disable or
enable.
.Privacy: Only show call alerts in the
instrument cluster.
Touch Off or On.
.Sort Contacts: Touch to sort by first
or last name.
.Re-sync Device Contacts: Allows the
device contacts to re-sync if you are
having difficulty accessing all of the
contacts on your cell phone.
.Delete All Vehicle Contacts: Touch
to delete all vehicle stored contacts.
.OnStar Phone TTY Mode: This
enables OnStar cell phone
TTY mode.
Touch Disable or Enable.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
198 CLIMATE CONTROLS
Automatic Operation
The system automatically controls the
following four functions to heat or
cool the vehicle to the desired
temperature:
.Fan Speed
.Air Delivery Mode
.Air Conditioning
.Recirculation
When the AUTO indicator light is lit,
all four functions are operating
automatically. Each function can be
manually set and the selected setting
will be shown. This cancels full
automatic operation and the AUTO
indicator light turns off. Functions
that are not manually set will
continue to be automatically
controlled, although the AUTO
indicator light will not be lit.
To place the system in
automatic mode: 1. Press AUTO.
2. Set the driver and passenger temperature. To find your comfort setting, start
with 22 °C (72 °F) and allow the
system time to stabilize. Then
adjust the temperature as needed
for best comfort.
To improve fuel efficiency and to cool
the vehicle faster, recirculation may be
automatically selected in warm
weather.
The recirculation light will not come
on when automatically controlled.
Press
@to manually select
recirculation; press it again to select
outside air.
Do not cover the solar sensor on the
top of the instrument panel near the
windshield. This sensor regulates air
temperature based on sun load. See
“Sensors ”later in this section.
Manual Operation
On/Off : Press to turn the climate
control system on or off. When the
system is off, outside air will be
prevented from entering the vehicle.
When the system is on or a button is
pressed, the climate control system
will turn on and deliver airf low per
the current setting.
9: Press button up or down to
increase or decrease the fan speed.
Press AUTO to return to automatic
operation.
Driver and Passenger Temperature
Control : The temperature can be
adjusted separately for the driver and
passenger.
Press button up or down to increase
or decrease the driver or passenger
temperature setting.
The driver side or passenger side
temperature display shows the
temperature setting increasing or
decreasing.
SYNC : Press to link the passenger
and rear climate temperature settings,
if equipped, to the driver setting. The
SYNC indicator light will turn on.
When the passenger or rear climate
temperature settings are adjusted, the
SYNC indicator light is off.
Air Delivery Mode Control : Press
Y,
[, orzto change the direction of
the airf low. An indicator light comes

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
200 CLIMATE CONTROLS
during remote start based on cold
ambient conditions. The rear defog
indicator light does not come on
during a remote start.
If equipped, the heated seats will turn
on if it is cold outside or the
ventilated seats will turn on if it is hot
outside. The heated and ventilated
seat indicator lights may not come on
during a remote start. If equipped, the
heated steering wheel will come on in
a remote start if it is cold outside. The
heated steering wheel indicator light
may not come on.
Ionizer :If equipped with an ionizer,
this feature helps to clean the air
inside the vehicle and remove
contaminants such as pollen, odors,
and dust. If the climate control
system is on and the ionizer is
enabled, the ionizer status indicator
will be lit on the climate control
display. To turn the ionizer on or off,
see Climate and Air Quality under
Vehicle Personalization 0117.Sensors
The solar sensor, located in the
defrost grille in the middle of the
instrument panel, monitors the solar
heat. Do not cover the solar sensor or
the system will not work properly.
There is also an exterior temperature
sensor behind the front grille. This
sensor reads the outside air
temperature and helps maintain the
temperature inside the vehicle. Any
cover on the front of the vehicle,
could cause a false reading in the
displayed temperature. The climate control system uses the
information from these sensors to
maintain comfort settings by
adjusting the outlet temperature, fan
speed, and air delivery mode. The
system may also supply cooler air to
the side of the vehicle facing the sun.
The recirculation mode will also be
used as needed to maintain cool
outlet temperatures.
Air Vents
Adjustable air vents are in the center
and on the sides of the instrument
panel, and on the rear of the center
console storage.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
208 DRIVING AND OPERATING
Engine Oil
Check the oil level often during track
events and competitive driving and
keep the oil level at or near the
upper mark.
Fuel
Use premium unleaded gasoline with
a posted octane rating of 93 at a track
event. Unleaded gasoline with a
posted octane rating of 91 may be
used, but performance will be
degraded.
Automatic Transmission Fluid
Have the transmission fluid set to the
track specific oil level prior to track
usage. Transmission fluid should be
changed after every 15 hours of track
usage. Any transmission level set or
change should be performed at your
dealer.
Brakes
Brake cooling can be improved if the
front brake disc splash shield and
front tire deflector are removed.
Removing the shield will require that
the suspension bushings and wheelspeed wires visible to the brake disc
be protected with insulated thermal
wrapping.
Caution
Removing the splash shield can
degrade wet braking performance,
as well as introduce brake pedal
pulsation, due to brake disc
exposure to road debris. Only
remove the front brake disc splash
shield and front tire deflector when
driving in track events.
Brake Pad Wear Sensors
(V-Series Only)
If equipped, the brake pad wear
sensors need to be removed from the
brake calipers prior to any track or
racing event. The original sensors can
be reinstalled if significant brake pad
wear is not observed. The sensor
should not extend beyond the brake
pad surface at the rotor contact.
If this condition is observed, the brake
pad life system needs to be disabled
until a new set of brake pads and
sensors are installed and the system
reset. Brake Fluid
.Before racing, replace existing brake
fluid with a qualified racing brake
fluid from a sealed container. Brake
fluid with a dry boiling point
>279 °C (534 °F) is qualified.
If racing brake fluid is used, replace
it with GM approved brake fluid
before driving on public roads. See
Recommended Fluids and Lubricants
0
391.
.Do not use silicone-based fluids.
If racing brake fluid is in the vehicle
and the age of the brake fluid is over a
month old or unknown, replace the
brake fluid between racing/closed
track driving.
Caution
Failure to change the brake fluid
and transfer case fluid after any
performance or race track driving
could result in damage not covered
by the vehicle warranty. Have the
brake fluid and transfer case fluid
changed by your dealer after any (Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
248 DRIVING AND OPERATING
Automatic Transmissions
.The brake pedal is firmly pressed to
the floor, equivalent to a panic
brake event.
.The accelerator pedal is rapidly
applied to wide open throttle. If the
vehicle rolls due to wide open
throttle, release the throttle, press
the brake pedal more firmly, and
re-apply the accelerator to wide
open throttle.
Launch Control will initially limit
engine speed as you rapidly apply the
accelerator pedal to wide open
throttle. Allow the engine rpm to
stabilize. A smooth, quick release of
the brake pedal, while maintaining the
fully pressed accelerator pedal, will
manage wheel slip.
After the vehicle is launched, the
system continues in Competitive
Driving Mode or PTM.
Competitive Driving Mode, PTM, and
Launch Control are systems designed
for a closed course race track and not
intended for public roads. The systems are not intended to compensate for
lack of driver experience or familiarity
with the race track.Limited-Slip Differential
If equipped, the Electronic
Limited-Slip Differential (eLSD) is
automatically activated. eLSD actively
monitors vehicle sensors and driver
inputs to determine the amount of
change for the conditions. With eLSD,
the vehicle has:
.Enhanced high-speed control.
.Improved traction through corners,
allowing more acceleration.
.More precise steering.
.Increased vehicle agility.
.Integration with StabiliTrak/
Electronic Stability Control (ESC).
For vehicles with eLSD, driven under
severe conditions, the rear axle fluid
should be changed. See Competitive
Driving Mode 0246 and
Maintenance Schedule 0380.
Cruise Control
{
Warning
Cruise control can be dangerous
where you cannot drive safely at a
steady speed. Do not use cruise
control on winding roads or in
heavy traffic.
Cruise control can be dangerous on
slippery roads. On such roads, fast
changes in tire traction can cause
excessive wheel slip, and you could
lose control. Do not use cruise
control on slippery roads.
With cruise control, a speed of about
40 km/h (25 mph) or more can be
maintained without keeping your foot
on the accelerator. Cruise control does
not work at speeds below about
40 km/h (25 mph).
If the Traction Control/StabiliTrak/
Electronic Stability Control (ESC)
system begins to limit wheel spin
while using cruise control, the cruise
control automatically disengages. See
Traction Control/Electronic Stability
Control 0239. If a collision alert