brake CADILLAC CT4 2023 Repair Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
284 Driving and Operating
Caution
The message
TRANSMISSION IS HOT—
SLOW DOWN displays and a
chime sounds if the manual
transmission fluid is hot and
vehicle speed is high. Driving
with the manual
transmission fluid
temperature high can
damage the vehicle. Drive at
a slower speed to cool the
manual transmission fluid.
This message clears when
the vehicle has slowed
sufficiently or if the manual
transmission fluid has cooled
sufficiently.
1 (First) : Press the clutch
pedal and shift into 1 (First).
Slowly let up on the clutch
pedal while pressing on the
accelerator pedal. After a complete stop, if it is
hard to shift into 1 (First), let
up on the clutch pedal, then
press it back down and shift
into 1 (First).
2 (Second) :
Press the clutch
pedal and let up on the
accelerator pedal, then shift
into 2 (Second). Then, slowly
let up on the clutch pedal
while accelerating.
3 (Third), 4 (Fourth), 5 (Fifth),
and 6 (Sixth) : Shift into
3 (Third), 4 (Fourth), 5 (Fifth),
and 6 (Sixth) the same as
2 (Second).
To stop, let up on the
accelerator pedal and press
the brake pedal. Just before
the vehicle stops, press the
clutch pedal and the brake
pedal, and shift to Neutral.
Neutral : Use this position
when you start or idle the
engine. The shift lever is in
Neutral when it is centered in
the shift pattern, not in
any gear. R (Reverse) :
To back up,
press down the clutch pedal,
completely stop the vehicle,
and shift into R (Reverse). Let
up on the clutch pedal slowly
while pressing the accelerator
pedal.
{Warning
If you skip a gear when
downshifting, you could lose
control of the vehicle. You
could injure yourself or
others. Do not shift down
more than one gear at a
time when downshifting.
Caution
Shifting to R (Reverse) while
the vehicle is moving
forward could damage the
transmission. The repairs
would not be covered by the
vehicle warranty. Shift to
R (Reverse) only after the
vehicle is stopped.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
286 Driving and Operating
.When ARM is deactivated,
the gear number is white.
.If no gear number is
displayed while the shift
lever is in gear, service is
required. All rev matching
will be disabled and the
malfunction indicator lamp
will be on. See Malfunction
Indicator Lamp (Check
Engine Light)0118. The
clutch and manual
transmission will continue to
operate normally.
ARM will also:
.Be active above 28 km/h
(18 mph).
.Match engine speed up to
6100 rpm.
.Not operate when the
accelerator pedal is applied.
.Be disabled when the
coolant temperature is
below 0 °C (32 °F).
Drive Systems
All-Wheel Drive
Vehicles with this feature
always send engine power
to all four wheels. It is fully
automatic, and adjusts itself as
needed for road conditions.
Brakes
Electric Brake Boost
Vehicles equipped with
electric brake boost have
hydraulic brake circuits that
are electronically controlled
when the brake pedal is
applied during normal
operation. The system
performs routine tests and
turns off within a few minutes
after the vehicle is turned off.
Noise may be heard during
this time. If the brake pedal is pressed during the tests or
when the electric brake boost
system is off, a noticeable
change in pedal force and
travel may be felt. This is
normal.
Antilock Brake
System (ABS)
The Antilock Brake System
(ABS) helps prevent a braking
skid and maintain steering
while braking hard.
If there is a problem with ABS,
this warning light stays on.
See Antilock Brake System
(ABS) Warning Light
0121.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
Driving and Operating 287
ABS does not change the time
needed to get a foot on the
brake pedal and does not
always decrease stopping
distance. If you get too close
to the vehicle ahead, there will
not be enough time to apply
the brakes if that vehicle
suddenly slows or stops.
Always leave enough room
ahead to stop, even with ABS.
Using ABS
Do not pump the brakes. Just
hold the brake pedal down
firmly. Hearing and feeling ABS
operate is normal.
Braking in Emergencies
ABS allows steering and
braking at the same time. In
many emergencies, steering
can help even more than
braking.
Electric Parking Brake
The Electric Parking Brake
(EPB) can always be applied,
even if the vehicle is off. In
case of insufficient electrical
power, the EPB cannot be
applied or released. To
prevent draining the battery,
avoid unnecessary repeated
cycles of the EPB.The system has a red parking
brake status light and an
amber service parking brake
warning light. See Electric
Parking Brake Light
0121 and
Service Electric Parking Brake
Light 0121. There are also
parking brake-related Driver
Information Center (DIC)
messages.
Before leaving the vehicle,
check the red parking brake
status light to ensure that the
parking brake is applied.EPB Apply
To apply the EPB:
1. Be sure the vehicle is at a complete stop.
2. Press the EPB switch momentarily.
The red parking brake status
light will flash and then stay on
once the EPB is fully applied.
If the red parking brake status
light flashes continuously, then
the EPB is only partially
applied or there is a problem
with the EPB. A DIC message

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
288 Driving and Operating
will display. Release the EPB
and try to apply it again. If the
light does not come on,
or keeps flashing, have the
vehicle serviced. Do not drive
the vehicle if the red parking
brake status light is flashing.
See your dealer.
If the amber service parking
brake warning light is on,
press the EPB switch.
Continue to hold the switch
until the red parking brake
status light remains on. If the
amber service parking brake
warning light is on, see your
dealer.
If the EPB is applied while the
vehicle is moving, the vehicle
will decelerate as long as the
switch is pressed. If the switch
is pressed until the vehicle
comes to a stop, the EPB will
remain applied.
The vehicle may automatically
apply the EPB in some
situations when the vehicle is
not moving. This is normal, and
is done to periodically checkthe correct operation of the
EPB system, or at the request
of other safety functions that
utilize the EPB.
If the EPB fails to apply, block
the rear wheels to prevent
vehicle movement.
EPB Release
To release the EPB:
1. Turn the ignition on or to accessory mode.
2. Apply and hold the brake pedal.
3. Press the EPB switch momentarily.
The EPB is released when the
red parking brake status light
is off.
If the amber service parking
brake warning light is on,
release the EPB by pressing
and holding the EPB switch.
Continue to hold the switch
until the red parking brake
status light is off. If either light
stays on after release is
attempted, see your dealer.
Caution
Driving with the parking
brake on can overheat the
brake system and cause
premature wear or damage
to brake system parts. Make
sure that the parking brake
is fully released and the
brake warning light is off
before driving.
If you are towing a trailer and
parking on a hill, see Driving
Characteristics and Towing
Tips 0358.
Automatic EPB Release
The EPB will automatically
release if the vehicle is
running, placed into gear, and
an attempt is made to drive
away. Avoid rapid acceleration
when the EPB is applied, to
preserve parking brake
lining life.
The EPB can also be used to
prevent roll back for vehicles
with a manual transmission

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
Driving and Operating 289
taking off on a hill. When no
roll back is desired, an applied
EPB will allow both feet to be
used for the clutch and
accelerator pedals in
preparation for starting the
vehicle moving in the intended
direction. In this case, there is
no need to press the switch to
release the EPB.
Brake Assist
Brake Assist detects rapid
brake pedal applications due
to emergency braking
situations and provides
additional braking to activate
the Antilock Brake System
(ABS) if the brake pedal is not
pushed hard enough to
activate ABS normally. Minor
noise, brake pedal pulsation,
and/or pedal movement during
this time may occur. Continue
to apply the brake pedal as
the driving situation dictates.
Brake Assist disengages when
the brake pedal is released.
Hill Start Assist (HSA)
{Warning
Do not rely on the HSA
feature. HSA does not
replace the need to pay
attention and drive safely.
You may not hear or feel
alerts or warnings provided
by this system. Failure to
use proper care when
driving may result in injury,
death, or vehicle damage.
See Defensive Driving0235.
When the vehicle is stopped
on a grade, Hill Start Assist
(HSA) temporarily prevents
the vehicle from rolling in an
unintended direction during
the transition from brake
pedal release to accelerator
pedal apply. The brakes
release when the accelerator
pedal is applied or
automatically release after a
few seconds. The brakes may also release under other
conditions. Do not rely on HSA
to hold the vehicle.
HSA is available when the
vehicle is facing uphill in a
forward gear, or when facing
downhill in R (Reverse). The
vehicle must come to a
complete stop on a grade for
HSA to activate.
Automatic Vehicle
Hold (AVH)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
290 Driving and Operating
{Warning
Do not rely on this feature.
It does not replace the need
to pay attention and drive
safely. You may not hear or
feel alerts or warnings
provided by this system.
Failure to use proper care
when driving may result in
injury, death, or vehicle
damage.
When Automatic Vehicle Hold
(AVH) is turned on and the
vehicle is braked to a stop,
AVH prevents the vehicle from
moving during the transition
from brake pedal release to
accelerator pedal apply. The
brakes release when the
accelerator pedal is applied.
The brakes may also release
under other conditions. Do not
rely on AVH to hold the
vehicle.
If the accelerator pedal is not
applied within a few minutes,
the Electric Parking Brake will apply. The parking brake will
also apply if the driver door is
opened or the driver seat belt
is unfastened while AVH is
holding the vehicle.
AVH can be turned on by
pressing AUTO HOLD. The
indicator light on the switch
will come on. The AVH light on
the instrument panel will come
on while AVH is actively
holding the vehicle. See
Automatic Vehicle Hold (AVH)
Light
0122.
Ride Control
Systems
Traction Control/
Electronic Stability
Control
The vehicle has a Traction
Control System (TCS) and
StabiliTrak/Electronic Stability
Control (ESC). These systems
help limit wheel slip and assist the driver in maintaining
control, especially on slippery
road conditions.
TCS activates if it senses that
any of the drive wheels are
spinning or beginning to lose
traction. When this happens,
the system brakes the
spinning wheel(s) and/or
reduces engine power to limit
wheel spin.
StabiliTrak/ESC activates
when the computer senses a
difference between the
intended path and the
direction the vehicle is actually
traveling. StabiliTrak/ESC
selectively applies braking
pressure at any one of the
vehicle's brakes to help steer
the vehicle in the intended
direction.
If cruise control is being used
and TCS or StabiliTrak/ESC
begins to limit wheel spin,
cruise control will disengage.
Cruise control may be turned
back on when road conditions
allow.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
Driving and Operating 291
Both systems come on
automatically when the vehicle
is started and begins to move.
The systems may be heard or
felt while they are operating
or while performing diagnostic
checks. This is normal and
does not mean there is a
problem with the vehicle.
It is recommended to leave
both systems on for normal
driving conditions, but It may
be necessary to turn TCS off
if the vehicle gets stuck in
sand, mud, ice, or snow. See If
the Vehicle Is Stuck0255 and
“Turning the Systems Off and
On” later in this section.
The indicator light for both
systems is in the instrument
cluster. This light will:
.Flash when TCS is limiting
wheel spin.
.Flash when StabiliTrak/ESC
is activated.
.Turn on and stay on when
either system is not working.
If either system fails to turn on
or to activate, a message may
display in the Driver
Information Center (DIC), and
dcomes on and stays on to
indicate that the system is
inactive and is not assisting
the driver in maintaining
control. The vehicle is safe to
drive, but driving should be
adjusted accordingly.
If
dcomes on and stays on:
1. Stop the vehicle.
2. Turn the engine off and wait 15 seconds.
3. Start the engine.
Drive the vehicle. if
dcomes
on and stays on, the vehicle
may need more time to
diagnose the problem. If the
condition persists, see your
dealer.
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
light
idisplays in the
instrument cluster. A DIC
message may display.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
Driving and Operating 295
responsiveness. PTM can be
accessed through this mode.
See“Performance Traction
Management” in Competitive
Driving Mode 0298.
See “Mode Selection
Attributes” later in this
section.
While driving on a track, turn
off applicable driver
assistance features. For more
information see Assistance
Systems for Driving 0342.
My Mode
My Mode is used to
personalize everyday driving.
This mode is designed to allow
the driver to configure vehicle
systems to their own
preference for city or normal
driving. Through the DIC, the following
vehicle systems may be
available for customization in
this mode.
.Steering: Tour (default),
Sport, Track
.Suspension: Tour (default),
Sport, Track
.Brake Feel: Tour (default),
Sport, Track
.Engine Sound: Stealth, Tour
(Default), Sport, Track
For information on the range
of settings, see “Drive Mode
Customization.”
V-Mode (V-Series Only)
V-Mode is used to personalize
dynamic driving. This mode is
designed to allow the driver to
configure vehicle subsystems
to their own preference for
maximum handling. V-Mode
further enhances the driver’s experience by adding an
Engine/Shift customization
option. Through the DIC, the
following vehicle systems may
be available for customization
in this mode.
.Steering: Tour, Sport
(default), Track
.Suspension: Tour, Sport,
(default), Track
.Engine/Shift: Snow/Ice, Tour,
Sport, (default), Track
.Brake Feel: Tour, Sport,
Track
.Engine Sound: Stealth, Tour,
Sport (default), Track
.PTM: OFF, WET, DRY,
SPORT, RACE 1, RACE 2
For information on the range
of settings, see “Drive Mode
Customization.”

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
296 Driving and Operating
Mode Selection Attributes
MODESTOUR
Default SPORT
TRACK SNOW/ICE
Engine/Shift TourTourTrackSnow/Ice
Throttle Progression TourTourTrackSnow/Ice
Transmission Shift Mode TourSport Track Tour
Engine Sound TourSport Track Tour
Steering TourSport Track Tour
Suspension (if equipped with Magnetic Ride
Control) Tour
Sport Track Tour
Traction and Stability Control TourTourTrack Tour
Competitive Driving Mode (if equipped) Not Available Available Not Available Not Available
Performance Traction Mode (if equipped) Not Available Not Available Available Not Available
Brake Feel TourSport Track Tour
Throttle Progression
Adjusts throttle sensitivity by
selecting how quick or slow
the throttle reacts to input.
.Snow/Ice–The accelerator
pedal reduces engine torque
at small pedal inputs. This
allows better wheel control
on slippery surfaces.
.Track –The accelerator
pedal adjusts to give
maximum control during the
highest level of spirited
driving.
Transmission Shift Mode
Sport or Track –Dynamic
Performance Mode (DPM)
allows the transmission to
hold the current gear after a quick release of a heavily
applied accelerator pedal. This
provides greater engine
braking and enhanced vehicle
control without using the
paddles. DPM recognizes
aggressive cornering, heavy
braking, and high acceleration
to select and hold lower gears
when not using paddles. The

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
Driving and Operating 297
shifts are also firmer to
increase the quickness of
shifting.
Engine Sound
Adjusts the volume of engine
noise.
The sound level changes when
the variable exhaust
valves open.
Steering (Assist Effort)
Adjusts from a lighter steering
feel in Tour Mode to reduced
assist in Sport and Track
Mode for more steering feel.
Magnetic Ride Control (If
Equipped)
Adjusts the shock dampening
firmness from a comfort in
Tour Mode to an optimized
responsiveness tune in Sport
and Track.
Stability Control
.Competitive Mode allows
less computer control to
permit some slide and driftand is selected with the
TCS/StabiliTrak button
–
only available in Sport Mode.
.StabiliTrak/Electronic
Stability Control (ESC) can
be turned off by pressing
and holding the TCS/
StabiliTrak button for
five seconds.
Brake Feel
Adjusts brake pedal sensitivity
by selecting how quick or slow
the brakes respond to input.
Drive Mode Customization
The following settings can be
changed using the Drive Mode
Customization Menu. See
Settings > Vehicle > Drive
Mode Customization in the
center display to customize
My Mode or V-Mode.
Steering
Steering adjusts the effort
required to turn the steering
wheel. The steering wheel
offers better feedback in the Tour setting, but requires
more effort in the Sport and
Track settings.
–Tour, Sport, Track
Suspension
Suspension adjusts the
firmness of the suspension in
the vehicle. Suspension
adjusts the stiffness of the
shocks and/or springs. The
ride is more comfortable at
lower settings and is stiffer at
higher settings for better
control.
–Tour, Sport, Track
Brake Feel
Brake Feel adjusts the brake
pedal response. Settings
range from a slower response
for more comfortable driving
to the quickest response for
quicker deceleration. Brake
pedal travel decreases and
caliper pressure increases in
the Sport and Track settings.
–Tour, Sport, Track