ECU CADILLAC DTS 2008 1.G Owner's Manual

If your 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
1-58

The passenger sensing system works with sensors that
are part of the right front passenger’s seat and safety belt.
The sensors are designed to detect the presence of a
properly-seated occupant and determine if the right front
passenger’s frontal airbag and seat-mounted side impact
airbag should be enabled (may inate) or not.
Accident statistics show that children are safer if they
are restrained in the rear rather than the front seat.
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 your 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.
{CAUTION:
A child in a rear-facing child restraint can be
seriously injured or killed if the right front
passenger’s airbag inates. This is because
the back of the rear-facing child restraint
would be very close to the inating airbag.
Even though the passenger sensing system is
designed to turn off the right front passenger’s
frontal and seat-mounted side impact airbag if
the system detects a rear-facing child restraint,
no system is fail-safe, and no one can guarantee
that an airbag will not deploy under some
unusual circumstance, even though it is turned
off. We recommend that rear-facing child
restraints be secured in a rear seat, even if the
airbags 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.
1-64

The passenger sensing system is designed to turn off
the right front passenger’s frontal 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’s 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 3-58.
If a child restraint has been installed and the on indicator
is lit, turn the vehicle off. Remove the child restraint from
the vehicle and reinstall the child restraint following thechild restraint manufacturer’s directions and refer to
Securing a Child Restraint in the Right Front Seat
Position on page 1-50.
If, after reinstalling the child restraint and restarting the
vehicle, the on indicator is still lit, check to make sure that
the vehicle’s seatback is not pressing the child restraint
into the seat cushion. If this happens, slightly recline the
vehicle’s seatback and adjust the seat cushion if
possible. 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 1-7.
Remove any additional material from the seat such as
blankets, cushions, seat covers, seat heaters, or seat
massagers before reinstalling or securing the child
restraint.
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.
The passenger sensing system is designed to enable
(may inate) the right front passenger’s 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’s 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.
1-65

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 alsointerfere 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 1-63.
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......................................2-8
Doors and Locks............................................2-10
Door Locks..................................................2-10
Central Door Unlocking System......................2-10
Power Door Locks........................................2-10
Programmable Automatic Door Locks..............2-11
Rear Door Security Locks..............................2-11
Lockout Protection........................................2-12
Trunk..........................................................2-12
Windows........................................................2-14
Power Windows............................................2-15
Sun Visors...................................................2-17
Theft-Deterrent Systems..................................2-18
Valet Lockout Switch.....................................2-18
Content Theft-Deterrent.................................2-19
PASS-Key
®III+ Electronic Immobilizer.............2-20
PASS-Key®III+ Electronic Immobilizer
Operation.................................................2-21Starting and Operating Your Vehicle................2-22
New Vehicle Break-In....................................2-22
Ignition Positions..........................................2-23
Retained Accessory Power (RAP)...................2-24
Starting the Engine.......................................2-24
Engine Coolant Heater..................................2-26
Automatic Transmission Operation...................2-27
Performance Shifting.....................................2-29
Parking Brake..............................................2-30
Shifting Into Park..........................................2-31
Shifting Out of Park......................................2-33
Parking Over Things That Burn.......................2-34
Engine Exhaust............................................2-34
Running the Vehicle While Parked..................2-35
Mirrors...........................................................2-36
Automatic Dimming Rearview Mirror................2-36
Compass.....................................................2-36
Outside Power Foldaway Mirrors.....................2-38
Outside Automatic Dimming Mirror..................2-39
Park Tilt Mirrors............................................2-39
Outside Convex Mirror...................................2-39
Outside Heated Mirrors..................................2-39
Section 2 Features and Controls
2-1

Programmable Automatic Door
Locks
Your vehicle is programmed so that, when the doors are
closed, the ignition is on, and the shift lever is moved
out of PARK (P), all the doors will lock. The doors
will unlock every time you stop the vehicle and move
the shift lever into PARK (P).
If someone needs to get out while your vehicle is not
in PARK (P), have the person use the manual lock knob
or power door lock switch. When the door is closed
again, it will not lock automatically. Use the manual lock
knob or power door lock switch to lock the door.
With the vehicle in PARK (P) and the ignition on, the
door locks can be programmed through prompts
displayed on the Driver Information Center (DIC). These
prompts allow the driver to choose various lock and
unlock settings. For programming information, seeDIC
Vehicle Customization on page 3-87.
Rear Door Security Locks
Your 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, your vehicle will have
one of the following:
To use these locks, do the following:
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.
2-11

The rear doors on your vehicle cannot be opened from
the inside when this feature is in use.
When you want to open a rear door when the security
lock is on, do the following:
1. Unlock the door using the remote keyless entry
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, do the following:
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’s door will unlock. It is always
recommended that you remove the ignition key when
locking your vehicle.
The lockout protection feature can be overridden by
holding the power door lock switch for three seconds or
longer.
Trunk
{CAUTION:
It can be dangerous to drive with the trunk lid
open because carbon monoxide (CO) gas can
come into your vehicle. You cannot see or
smell CO. It can cause unconsciousness and
even death. If you must drive with the trunk lid
open or if electrical wiring or other cable
connections must pass through the seal
between the body and the trunk lid:
Make sure all other windows are shut.
Turn the fan on your heating or cooling
system to its highest speed and select the
control setting that will force outside air
into your vehicle. See Climate Control
System.
If you have air outlets on or under the
instrument panel, open them all the way.
SeeEngine Exhaust on page 2-34.
2-12

Remote Trunk Release
G
(Remote Trunk Release):The remote trunk
release button is located to the left of the steering wheel
next to the instrument panel brightness control. Press the
button to open the trunk. To use this feature, your vehicle
must be in PARK (P) or NEUTRAL (N) and the valet
lockout switch must be off.
You can also press the button with the trunk symbol on
the remote keyless entry transmitter to open the trunk.
To disable this feature, seeValet Lockout Switch on
page 2-18.
If the vehicle has lost power, the trunk can be accessed
using the Rear Seat Pass-Through. See Rear Seat
Pass-Through below.
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.
2-13

— (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 2-12for additional
information.
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.
2-19

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.
Testing the Alarm
1. From inside the vehicle, roll down the window, then
get out of the vehicle, keeping the door open.
2. From outside of the vehicle, with the door open, lock
the vehicle using the power door lock or the RKE
system and close the door. Wait 30 seconds until the
security lamp goes off.
3. Reach in and unlock the door using the manual lock
and open the door. The horn will sound and the
hazard lights will ash.
You can turn off the alarm by unlocking the driver’s door
with your key, using the unlock button on the RKE
transmitter or by starting the car with a valid key.
If the alarm does not sound when it should, check to see
if the horn works. The horn fuse may be blown. To
replace the fuse, seeFuses and Circuit Breakers on
page 5-101. If the fuse does not need to be replaced, you
may need to have your vehicle serviced.
To reduce the possibility of theft, always arm the
theft-deterrent system when leaving your vehicle.
PASS-Key®III+ Electronic
Immobilizer
The PASS-Key III+ system operates on a radio
frequency subject to Federal Communications
Commission (FCC) Rules and with Industry Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation.
This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modications to this system by other than
an authorized service facility could void authorization to
use this equipment.
PASS-Key III+ uses a radio frequency transponder in
the key that matches a decoder in the vehicle.
2-20