light CADILLAC CT4 2023 Repair Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Instruments and Controls 143
watching the indicator light
and garage door
activation.
.If the indicator light
stays on continuously or
the garage door moves
when the button is
pressed, then
programming is
complete. There is no
need to complete
Steps 4–6.
.If the indicator light does
not come on or the
garage door does not
move, a second button
press may be required.
For a second time, press
and hold the newly
programmed button for
five seconds. If the
indicator light stays on
continuously or the
garage door moves
when the button is
pressed, then
programming is
complete. There is no
need to complete
Steps 4–6.
.If the garage door does
not move, continue with
programming Steps 4–6.
Learn or Smart Button
4. After completing Steps 1– 3, locate the Learn or
Smart button inside
garage on the garage door
opener receiver. The name
and color of the button
may vary by manufacturer.
5. Press and release the Learn or Smart button.
Step 6 must be completed
within 30 seconds of
pressing this button.
6. Return to the vehicle and firmly press and hold the
trained Universal Remote
system button for two seconds and release.
Repeat the
“press/hold/
release” sequence up to
three times to complete
the training process.
The Universal Remote system
should now activate the
garage door. Repeat the
process for programming the
remaining two buttons.
For questions or programming
help, see www.homelink.com/
gm or call 1-800-355-3515.
For calls placed outside the
U.S., Canada, or Puerto Rico,
international rates will apply
and may differ based on
landline or mobile phone.
Radio Signals for Some
Gate Operators
Some gate operators and
radio-frequency laws require
transmitter signals to time out
or quit after several seconds
of transmission. This may not
be long enough for the

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
144 Instruments and Controls
Universal Remote system to
pick up the signal during
programming.
If the programming did not
work, replace Step 2 under
“Programming the Universal
Remote System”with the
following:
Press and hold the Universal
Remote system button while
pressing and releasing the
hand-held transmitter button
every two seconds until the
signal has been successfully
accepted by the Universal
Remote system. The Universal
Remote system indicator light
will flash slowly at first and
then change to a rapid flash or
continuous solid-light. Proceed
with Step 3 under
“Programming the Universal
Remote System” to complete.Universal Remote
System Operation
Using the Universal
Remote System
Press and hold the
appropriate Universal Remote
system button for at least
one-half second. The indicator
light will come on while the
signal is being transmitted.
Erasing Universal Remote
System Buttons
Erase all programmed buttons
when vehicle ownership is
terminated.
To erase:
1. Press and hold the two outside buttons until the
indicator light begins to
flash. This should take
about 10 seconds.
2. Release both buttons.
Reprogramming a Single
Universal Remote System
Button
To reprogram any of the
system buttons: 1. Press and hold any one of the buttons. Do not
release the button.
2. The indicator light will begin to flash after
20 seconds. Without
releasing the button,
proceed with Step 1 under
“Programming the
Universal Remote System.”

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Lighting 145
Lighting
Exterior Lighting
Exterior LampControls . . . . . . . . . . . . . . . . . . . . . 145
Exterior Lamps Off Reminder . . . . . . . . . . . . . . . . . . . . 147
Headlamp High/ Low-Beam Changer . . . . . 147
Flash-to-Pass . . . . . . . . . . . . . . . 147
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . 147
Automatic Headlamp System . . . . . . . . . . . . . . . . . . . . . . 148
Hazard Warning Flashers . . . . . . . . . . . . . . . . . . . . . 149
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . 149
Cornering Lamps . . . . . . . . . . 149
Interior Lighting
Instrument Panel Illumination Control . . . . . . 150
Courtesy Lamps . . . . . . . . . . . 150
Dome Lamps . . . . . . . . . . . . . . . . 150
Reading Lamps . . . . . . . . . . . . . 150
Lighting Features
Entry Lighting . . . . . . . . . . . . . . . 151
Exit Lighting . . . . . . . . . . . . . . . . . . 151
Battery Load Management . . . . . . . . . . . . . . . 152
Battery Power
Protection . . . . . . . . . . . . . . . . . . 153
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . . . 153Exterior Lighting
Exterior Lamp
Controls
The exterior lamp control is on
the turn signal lever.
Turn the control to the
following positions:
O:Turns the exterior lamps
off and deactivates the AUTO
mode. Turn to
Oagain to
reactivate the AUTO mode.
In Canada, the headlamps will
automatically reactivate when
the vehicle is shifted out of
P (Park).

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
146 Lighting
AUTO :Automatically turns
the exterior lamps on and off,
depending on outside lighting.
;: Turns on the parking
lamps including all lamps,
except the headlamps.
2: Turns on the headlamps
together with the parking
lamps and instrument panel
lights.
IntelliBeam System
If equipped, this system turns
the vehicle's high-beam
headlamps on and off
according to surrounding
traffic conditions.
The system turns the
high-beam headlamps on when
it is dark enough and there is
no other traffic present.
This light
bcomes on in the
instrument cluster when the
IntelliBeam system is enabled. 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

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Lighting 147
the AUTO or2position 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.
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.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
148 Lighting
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.
If the vehicle is started in a
dark garage, the automatic
headlamp system comes on
immediately. If it is light
outside when the vehicle
leaves the garage, there is a slight delay before the
automatic headlamp system
turns off the headlamps.
During that delay, the
instrument cluster may not be
as bright as usual. Make sure
the instrument panel
brightness control is in the full
bright position. See
Instrument Panel Illumination
Control
0150.
When it is bright enough
outside, the headlamps will
turn off.
The automatic headlamp
system turns off when the
exterior lamp control is turned
to
Oor the ignition is off. For
vehicles sold in Canada, this
control only works when the
transmission is in P (Park).
Lights On with Wipers
If the windshield wipers are
activated in daylight with the
engine on, and the exterior
lamp control is in AUTO, the
headlamps, parking lamps, and
other exterior lamps come on.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Lighting 149
The transition time for the
lamps coming on varies based
on wiper speed. When the
wipers are not operating,
these lamps turn off. Move the
exterior lamp control to
Oor
;to disable this feature.
Hazard Warning
Flashers
|:Press this button to make
the front and rear turn signal
lamps flash on and off.
Release the button for at least
one second and press again to
turn the flashers off. The hazard warning flashers
turn on automatically if the
airbags deploy.
Turn and
Lane-Change Signals
Move the lever all the way up
or down to signal a turn.
An arrow on the instrument
cluster flashes in the direction
of the turn or lane change.
Raise or lower the lever until
the arrow starts to flash to
signal a lane change. Hold it
there until the lane change is
completed. If the lever is
briefly pressed and released,
the turn signal flashes three
times.
The turn and lane-change
signal can be turned off
manually by moving the lever
back to its original position.
If after signaling a turn or lane
change, the arrow flashes
rapidly or does not come on, a
signal function may be
inoperative. This vehicle may
be equipped with LED lighting.
For replacement of any LED
lighting, contact your dealer.
Cornering Lamps
If equipped with cornering
lamps, they automatically
come on when all of the
following occur:
.The low-beam headlamps
are on.
.The turn signals are
activated or the steering
wheel is at a turning angle.
.The vehicle speed is below
40 km/h (25 mph).

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
150 Lighting
Interior Lighting
Instrument Panel
Illumination Control
This feature adjusts the
brightness of all illuminated
controls.
D:Move the thumbwheel up
or down to brighten or dim the
lights.
The thumbwheel is functional
at night, or when the
headlamps or parking lamps
are ON.
Courtesy Lamps
The courtesy lamps come on
when any door is opened,
Kon
the remote key is pressed,
or when the vehicle is turned
off. See Dome Lamps 0150.
Dome Lamps
The dome lamp controls are in
the overhead console.
The dome lamps come on
when any door is opened,
Kon
the remote key is pressed,
or when the vehicle is
turned off. To operate, press the
following buttons:
jOFF :
Press to turn off the
dome lamps. An indicator light
on the button will turn on
when the dome lamp override
is activated. Press
jOFF
again to deactivate this
feature and the indicator light
will turn off.
+ON/OFF : Press to turn the
dome lamps on or off manually.
Reading Lamps
There are front and rear
reading lamps on the
overhead console and over
the rear passenger doors.
These lamps will come on
when any door is opened,
Kon
the remote key is pressed,
or when the vehicle is
turned off.
Front Reading Lamps
The front reading lamps are
on the overhead console.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Lighting 151
Press the lamp lenses to
manually turn on or off the
front reading lamps.
Rear Reading Lamps
The rear reading lamps are
over the rear passenger
doors.
Press the lamp lenses to
manually turn on or off the
rear reading lamps.
Lighting Features
Entry Lighting
The interior lamps turn on
when pressing
Kon the
remote key or opening any
doors, and the dome lamp
control is not in the
jOFF
position.
Some exterior lamps also turn
on when pressing
Kon the
remote key or opening any
doors. Low-Beam lamps will
only turn on briefly at night,
or in areas with limited lighting.
All lamps will gradually fade
out after about 30 seconds.
Entry lighting can be disabled
manually by closing all doors,
pressing
Qon the remote key,
or starting the vehicle. This feature can be changed.
On the infotainment home
page, select the Setting icon >
Vehicle > Vehicle Locator
Lights.
Approach Detection
If equipped, the entry lighting
feature will automatically turn
on when the remote key is
detected within approximately
2 m (6 ft) of the vehicle.
If the vehicle has remained
parked for an extended period
of time with no remote key use
or keyless access operation,
approach detection will be
disabled. To reactivate, press
any button on the remote key
or open and close all vehicle
doors to re-enable the entry
lighting feature on approach.
Exit Lighting
Some exterior lamps and
interior lamps turn on when
the driver door is opened after
the vehicle is turned off.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
152 Lighting
The exterior and interior lamps
remain on for a set amount of
time, then automatically
turn off.
The interior lights turn on
when the vehicle is turned off.
The exterior lamps turn off
immediately by turning the
exterior lamp control off.
This feature can be changed.
On the infotainment home
screen, select the Settings
icon
TVehicleTExit Lighting.
Battery Load
Management
The vehicle has Electric Power
Management (EPM), which
estimates the battery's
temperature and state of
charge. It then adjusts the
voltage for best performance
and extended life of the
battery.
When the battery's state of
charge is low, the voltage is
raised slightly to quickly bring
the charge back up. When thestate of charge is high, the
voltage is lowered slightly to
prevent overcharging. If the
vehicle has a voltmeter gauge
or a voltage display on the
Driver Information Center
(DIC), you may see the voltage
move up or down. This is
normal. If there is a problem,
an alert will be displayed.
The battery can be discharged
at idle if the electrical loads
are very high. This is true for
all vehicles. This is because
the generator (alternator) may
not be spinning fast enough at
idle to produce all the power
that is needed for very high
electrical loads.
A high electrical load occurs
when several of the following
are on, such as: headlamps,
high beams, fog lamps, rear
window defogger, climate
control fan at high speed,
heated seats, engine cooling
fans, and loads plugged into
accessory power outlets.
EPM works to prevent
excessive discharge of the
battery. It does this by
balancing the generator's
output and the vehicle's
electrical needs. It can
increase engine idle speed to
generate more power,
whenever needed. It can
temporarily reduce the power
demands of some accessories.
Normally, these actions occur
in steps or levels, without
being noticeable. In rare cases
at the highest levels of
corrective action, this action
may be noticeable to the
driver. If so, a DIC message
might be displayed. If a battery
message is displayed, it is
recommended that the driver
reduce the electrical loads as
much as possible. See Driver
Information Center (DIC) (Base
Level)
0129 or
Driver Information Center
(DIC) (Uplevel) 0132.