ECU CADILLAC DTS 2009 1.G Owner's Manual

If the vehicle has roof-rail airbags for the driver, right
front passenger, and second row outboard passengers,
they are in the ceiling above the side windows.
{CAUTION:
If something is between an occupant and an
airbag, the airbag might not inate properly or it
might force the object into that person causing
severe injury or even death. The path of an
inating airbag must be kept clear. Do not put
anything between an occupant and an airbag,
and do not attach or put anything on the steering
wheel hub or on or near any other airbag
covering.
Do not use seat accessories that block the
ination path of a seat-mounted side impact
airbag.
Never secure anything to the roof of a vehicle with
roof-rail airbags by routing a rope or tie down
through any door or window opening. If you do,
the path of an inating roof-rail airbag will be
blocked. Driver Side shown, Passenger Side similar
1-59

Passenger Sensing System
The vehicle has a passenger sensing system for the
right front passenger position. The passenger airbag
status indicator will be visible on the overhead console
when the vehicle is started.
The words ON and OFF, or the symbol for on and off,
are visible during the system check. If you are using
remote start, if equipped, to start the vehicle from
a distance, you may not see the system check. When
the system check is complete, either the word ON
or OFF, or the symbol for on or off, will be visible.
SeePassenger Airbag Status Indicator on page 3-55.The passenger sensing system turns off the right front
passenger frontal airbag and seat-mounted side
impact airbag under certain conditions. The driver
airbags and the roof-rail airbags are not affected by the
passenger sensing system.
The passenger sensing system works with sensors that
are part of the right front passenger seat. The sensors
are designed to detect the presence of a properly-seated
occupant and determine if the right front passenger
frontal airbag and seat-mounted side impact airbag
should be enabled (may inate) or not.
According to accident statistics, children are safer when
properly secured in a rear seat in the correct child
restraint for their weight and size.
We recommend that children be secured in a rear seat,
including: an infant or a child riding in a rear-facing
child restraint; a child riding in a forward-facing child
seat; an older child riding in a booster seat; and children,
who are large enough, using safety belts.
A label on the sun visor says, “Never put a rear-facing
child seat in the front.” This is because the risk to
the rear-facing child is so great, if the airbag deploys. United States
Canada
1-64

{CAUTION:
A child in a rear-facing child restraint can be
seriously injured or killed if the right front
passenger airbag inates. This is because the
back of the rear-facing child restraint would be
very close to the inating airbag. A child in a
forward-facing child restraint can be seriously
injured or killed if the right front passenger airbag
inates and the passenger seat is in a forward
position.
Even if the passenger sensing system has turned
off the right front passenger frontal airbag and
seat-mounted side impact airbag (if equipped),
no system is fail-safe. No one can guarantee that
an airbag will not deploy under some unusual
circumstance, even though the airbag(s) are off.
Secure rear-facing child restraints in a rear seat,
even if the airbag(s) are off. If you secure a
forward-facing child restraint in the right front seat,
always move the front passenger seat as far back
as it will go. It is better to secure the child restraint
in a rear seat.The passenger sensing system is designed to turn off
the right front passenger airbag and seat-mounted
side impact airbag if:The right front passenger seat is unoccupied.
The system determines that an infant is present in
a rear-facing infant seat.
The system determines that a small child is present
in a child restraint.
The system determines that a small child is present
in a booster seat.
A right front passenger takes his/her weight off of
the seat for a period of time.
The right front passenger seat is occupied by a
smaller person, such as a child who has outgrown
child restraints.
Or, if there is a critical problem with the airbag
system or the passenger sensing system.
When the passenger sensing system has turned off the
right front passenger frontal airbag and seat-mounted
side impact airbag, the off indicator will light and stay lit
to remind you that the airbags are off. SeePassenger
Airbag Status Indicator on page 3-55.
1-65

The passenger sensing system is designed to turn on
(may inate) the right front passenger frontal airbag and
seat-mounted side impact airbag anytime the system
senses that a person of adult size is sitting properly in
the right front passenger seat.
When the passenger sensing system has allowed the
airbags to be enabled, the on indicator will light and stay
lit to remind you that the airbags are active.
For some children who have outgrown child restraints
and for very small adults, the passenger sensing system
may or may not turn off the right front passenger frontal
airbag and seat-mounted side impact airbag, depending
upon the person’s seating posture and body build.
Everyone in the vehicle who has outgrown child restraints
should wear a safety belt properly — whether or not there
is an airbag for that person.
{CAUTION:
If the airbag readiness light ever comes on and
stays on, it means that something may be wrong
with the airbag system. To help avoid injury to
yourself or others, have the vehicle serviced right
away. SeeAirbag Readiness Light on page 3-54
for more information, including important safety
information.
If the On Indicator is Lit for a Child
Restraint
If a child restraint has been installed and the on
indicator is lit:
1. Turn the vehicle off.
2. Remove the child restraint from the vehicle.
3. Remove any additional items from the seat such as
blankets, cushions, seat covers, seat heaters, or
seat massagers.
4. Reinstall the child restraint following the directions
provided by the child restraint manufacturer and
refer toSecuring a Child Restraint in the Right Front
Seat Position on page 1-52.
5. If, after reinstalling the child restraint and restarting
the vehicle, the on indicator is still lit, turn the vehicle
off. Then slightly recline the vehicle seatback and
adjust the seat cushion, if adjustable, to make sure
that the vehicle seatback is not pushing the child
restraint into the seat cushion.
Also make sure the child restraint is not trapped
under the vehicle head restraint. If this happens,
adjust the head restraint. SeeHead Restraints
on page 1-2.
6. Restart the vehicle.
If the on indicator is still lit, secure the child in the
child restraint in a rear seat position in the vehicle,
and check with your dealer/retailer.
1-66

Adding Equipment to Your
Airbag-Equipped Vehicle
Q:Is there anything I might add to or change
about the vehicle that could keep the airbags
from working properly?
A:Yes. If you add things that change your vehicle’s
frame, bumper system, height, front end or side
sheet metal, they may keep the airbag system from
working properly. Changing or moving any parts
of the front seats, safety belts, the airbag sensing
and diagnostic module, steering wheel, instrument
panel, roof-rail airbag modules, ceiling headliner
or pillar garnish trim, overhead console, front
sensors, side impact sensors, or airbag wiring can
affect the operation of the airbag system.
In addition, your vehicle has a passenger sensing
system for the right front passenger’s position, which
includes sensors that are part of the passenger’s
seat. The passenger sensing system may not
operate properly if the original seat trim is replaced
with non-GM covers, upholstery or trim, or with GM
covers, upholstery or trim designed for a different
vehicle. Any object, such as an aftermarket seat
heater or a comfort enhancing pad or device,installed under or on top of the seat fabric, could also
interfere with the operation of the passenger sensing
system. This could either prevent proper deployment
of the passenger airbag(s) or prevent the passenger
sensing system from properly turning off the
passenger airbag(s). SeePassenger Sensing
System on page 1-64.
If you have any questions about this, you should
contact Customer Assistance before you modify
your vehicle. The phone numbers and addresses
for Customer Assistance are in Step Two of
the Customer Satisfaction Procedure in this manual.
SeeCustomer Satisfaction Procedure on page 7-2.
Q:Because I have a disability, I have to get
my vehicle modied. How can I nd out whether
this will affect my airbag system?
A:If you have questions, call Customer Assistance.
The phone numbers and addresses for Customer
Assistance are in Step Two of the Customer
Satisfaction Procedure in this manual. See
Customer Satisfaction Procedure on page 7-2.
In addition, your dealer/retailer and the service manual
have information about the location of the airbag sensors,
sensing and diagnostic module and airbag wiring.
1-69

Keys...............................................................2-3
Remote Keyless Entry (RKE) System................2-4
Remote Keyless Entry (RKE) System
Operation...................................................2-5
Remote Vehicle Start......................................2-7
Doors and Locks............................................2-10
Door Locks..................................................2-10
Central Door Unlocking System......................2-11
Power Door Locks........................................2-11
Programmable Automatic Door Locks..............2-11
Rear Door Security Locks..............................2-12
Lockout Protection........................................2-12
Trunk..........................................................2-13
Windows........................................................2-15
Power Windows............................................2-16
Sun Visors...................................................2-19
Theft-Deterrent Systems..................................2-20
Valet Lockout Switch.....................................2-20
Content Theft-Deterrent.................................2-21
PASS-Key
®III+ Electronic Immobilizer.............2-22
PASS-Key®III+ Electronic Immobilizer
Operation.................................................2-23Starting and Operating Your Vehicle................2-24
New Vehicle Break-In....................................2-24
Ignition Positions..........................................2-25
Retained Accessory Power (RAP)...................2-26
Starting the Engine.......................................2-26
Engine Coolant Heater..................................2-28
Automatic Transmission Operation...................2-29
Performance Shifting.....................................2-32
Parking Brake..............................................2-32
Shifting Into Park..........................................2-33
Shifting Out of Park......................................2-34
Parking Over Things That Burn.......................2-35
Engine Exhaust............................................2-36
Running the Vehicle While Parked..................2-37
Mirrors...........................................................2-38
Automatic Dimming Rearview Mirror................2-38
Compass.....................................................2-38
Outside Power Foldaway Mirrors.....................2-40
Outside Automatic Dimming Mirror..................2-40
Park Tilt Mirrors............................................2-41
Outside Convex Mirror...................................2-41
Outside Heated Mirrors..................................2-41
Section 2 Features and Controls
2-1

Rear Door Security Locks
The vehicle has security locks that prevent passengers
from opening the rear doors from the inside.
The rear door security locks are located on the inside
edge of each rear door. You must open the rear doors to
access them.
To assist you in nding the lock, the vehicle will have
one of the following:
To use these locks:
1. Turn the knob to the vertical position to engage
the lock.
2. Close the door.
3. Do the same for the other rear door.The rear doors on the vehicle cannot be opened from
the inside when this feature is in use.
When you want to open a rear door with the security
lock on:
1. Unlock the door using the RKE transmitter, the front
door power lock switch, or by lifting the rear door
manual lock knob.
2. Open the door from the outside.
To cancel the rear door security lock:
1. Unlock the door and open it from the outside.
2. Turn the knob to the horizontal position to
disengage the lock.
3. Do the same for the other rear door.
Lockout Protection
If the key is in the ignition and the power door lock switch
is used to lock the doors, all doors will lock and then the
driver door will unlock. It is always recommended that
the ignition key is removed from the vehicle when locking
the doors.
The lockout protection feature can be overridden by
holding the power door lock switch for three seconds
or longer.
2-12

Emergency Trunk Release Handle
Notice: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.
The emergency trunk release handle is only
intended to aid a person trapped in a latched trunk,
enabling them to open the trunk from the inside.There is a glow-in-the-dark emergency trunk release
handle located inside the trunk near the latch. This
handle will glow following exposure to light. Pull the
release handle to open the trunk from the inside.
Rear Seat Pass-Through
The vehicle has a small door in the rear seat. This door
allows access to the trunk from inside the vehicle.
The rear seat armrest must be down for the
pass-through door to open. To release the pass-through
door, move the release up. To close the door, raise it
and push it until it latches.
2-14

Theft-Deterrent Systems
Vehicle theft is big business, especially in some cities.
This vehicle has theft-deterrent features, however,
they do not make it impossible to steal.
Valet Lockout Switch
The valet lockout switch
is located inside the
glove box.
9(Off):Press this side of the button to turn the
lockout feature off. When the lockout feature is off,
you can open the trunk using either the keyless entry
transmitter or the trunk release button located near
the headlamp switch on the instrument panel.
— (On):Press this side of the button to turn the lockout
feature on. When the lockout feature is turned on,
the trunk cannot be unlocked with the keyless entry
transmitter or the trunk release button located near the
headlamp switch on the instrument panel.
If the valet lockout feature is on it will also disable the
Universal Home Remote transmitter, if equipped.
Locking the glove box with your key will also help to
secure your vehicle.
SeeRemote Keyless Entry (RKE) System Operation
on page 2-5andTrunk on page 2-13for additional
information.
2-20

Content Theft-Deterrent
The security light is
located on the instrument
panel cluster.
To arm the system:
1. Open the door.
2. Lock the door using the power door lock switch with
the door open or the Remote Keyless Entry (RKE)
transmitter. The security light will ash.
3. Close all the doors. The security light will come on
and stay on for approximately 30 seconds.
If a door or the trunk is opened without a key or a
RKE transmitter the horn will sound and the lamps will
ash for about 30 seconds.The theft-deterrent system will not arm if you lock the
doors with a key or use the manual door lock. It arms
only if you use a power door lock with the door open or
the RKE transmitter.
To avoid arming the alarm by accident:
Lock the vehicle with the door key or the manual
door lock.
Always unlock a door with a key or use the RKE
transmitter system. Pressing the unlock button
on the RKE transmitter, or unlocking a door with the
key disarms the content theft-deterrent system.
Unlocking a door any other way will activate
the alarm when a door or the trunk is opened.
If you activate the alarm by accident, unlock the driver’s
door with your key. You can also turn off the alarm
by using the unlock button on the RKE transmitter
system, or by starting the car with a valid key.
Changes or modications made to this system by
other than an authorized service facility could void
authorization to use the theft system.
2-21