2004 CADILLAC CTS V ECU

Immobilizer Operation
Your vehicle is equipped
with a passive
theft-deterrent system.
The system works when you turn the key to ON. The
key uses a transponder that matches an immobilizer
control unit in your vehicle. The correct key will start
the vehicle.
Your vehicle has a special key that works with the
theft-deterrent system. There is a transponder in the key
head. If the key is ever damaged, you may not be
able to start your vehicle.When trying to start the vehicle, if the engine does not
start and the security light comes on, the key may
have a damaged transponder. Turn the ignition off and
try again.
If the engine still does not start, and the key appears to
be undamaged, try another ignition key. At this time,
you may also want to check the fuse. SeeFuses
and Circuit Breakers on page 5-100. If the engine still
does not start with the other key, your vehicle needs
service. If your vehicle does start, the rst key may be
faulty. See your dealer who can service the
theft-deterrent system to have a new key made.
It is possible for the theft-deterrent system decoder to
learn the transponder value of a new or replacement
key. Up to 10 additional keys may be programmed for
the vehicle. This procedure is for learning additional
keys only.
Canadian Owners:If you lose or damage your keys,
only a GM dealer can service the theft-deterrent system
to have new keys made. To program additional keys
you will require two current driver’s keys. You must add
a step to the following procedure. After Step 2, repeat
Steps 1 and 2 with the second current driver’s key.
Then continue with Step 3.
2-20

To program a new key do the following:
1. Verify that the new key has PK3+ stamped on it.
2. Insert the current driver’s key in the ignition
and start the engine. If the engine will not start see
your dealer for service.
3. After the engine has started, turn the key to OFF,
and remove the key.
4. Insert the key to be programmed and turn it to ON
within ten seconds of removing the previous key.
5. The security light will turn off once the key has been
programmed. It may not be apparent that the
security light went on due to how quickly the key
is programmed.
6. Repeat the Steps 1 through 4 if additional keys are
to be programmed.
If you are ever driving and the security light comes on
and stays on, you will be able to restart your engine
if you turn it off. The theft-deterrent system, however,
is not working properly and must be serviced by
your dealer. Your vehicle is not protected by the
theft-deterrent system at this time.
In an emergency, contact Cadillac Roadside Assistance.
SeeRoadside Service on page 7-6.Starting and Operating
Your Vehicle
New Vehicle Break-In
Notice:Your vehicle does not need an elaborate
“break-in.” But it will perform better in the long
run if you follow these guidelines for the rst
500 miles (805 km):
Do not drive at any one speed — fast or slow.
Do not exceed 70 mph (113 km/h).
Do not make full-throttle starts; also refrain
from using the full throttle while driving.
If these procedures are not followed, your engine,
axle or other parts could be damaged.
Avoid making hard stops for the rst 200 miles
(322 km) or so. During this time your new brake
linings are not yet broken in. Hard stops with new
linings can mean premature wear and earlier
replacement. Follow this break-in guideline every
time you get new linings.
Do not tow a trailer during break-in. SeeTowing a
Trailer on page 4-39for more information.
2-21

Outside Heated Mirrors
When the rear window defogger is turned on, it also
warms both outside rearview mirrors to help clear them
of fog or ice. See “Rear Window Defogger” under
Dual Climate Control System on page 3-29for
more information.
OnStar®System
OnStar®uses global positioning system (GPS) satellite
technology, wireless communications, and call centers
to provide you with a wide range of safety, security,
information and convenience services.
A complete OnStar
®user’s guide and the terms and
conditions of the OnStar®Subscription Service
Agreement are included in your vehicle’s glove box
literature. For more information, visit www.onstar.com,
contact OnStar
®at 1-888-4-ONSTAR (1-888-466-7827),
or press the blue OnStar®button to speak to an
OnStar®advisor 24 hours a day, 7 days a week.A completed Subscription Service Agreement is required
prior to delivery of OnStar
®services and prepaid
calling minutes are also required for OnStar®Personal
Calling and OnStar®Virtual Advisor use. Terms and
conditions of the Subscription Service Agreement can be
found at www.onstar.com.
OnStar®Services
One of the following plans is normally included for a
specic duration with each vehicle equipped with
OnStar
®. You can upgrade or extend your OnStar®
service plan to meet your needs.
Safe and Sound Plan

Automatic Notication of Air Bag Deployment
Emergency Services
Roadside Assistance
Stolen Vehicle Assistance
AccidentAssist
Remote Door Unlock
Remote Diagnostics
Online Concierge
2-45

Directions and Connections Plan

All Safe and Sound Plan services
Route Support
RideAssist
Information and Convenience Services
Luxury and Leisure Plan

All Directions and Connections Plan services
Personal Concierge
OnStar®Personal Calling
With OnStar®Personal Calling, you have a safer way to
stay connected while driving. It’s a hands-free wireless
phone that’s integrated into your vehicle. You can place
calls nationwide using voice-activated dialing with no
contracts and no additional roaming charges. To nd out
more about OnStar
®Personal Calling, refer to the
OnStar®user’s guide in your vehicle’s glove box, or call
OnStar®at 1-888-4-ONSTAR (1-888-466-7827).
OnStar®Virtual Advisor
With OnStar®Virtual Advisor you can listen to the news,
entertainment and informative topics, such as traffic
and weather reports. You are able to listen and reply to
your e-mail through your vehicle’s speakers.
OnStar®Steering Wheel Controls (CTS)
You can use the steering wheel controls to interact
with the OnStar®system. See the OnStar®manual
provided with your vehicle for more information. Some
steering wheel controls can be programmed to
interact with OnStar
®. SeeRecongureable Steering
Wheel Controls (SWC) (CTS) on page 3-8.
HomeLink®Transmitter
If your vehicle has this
feature, the control buttons
are located on the
driver’s sun visor.
HomeLink
®a combined universal transmitter and
receiver, provides a way to replace up to three
hand-held transmitters used to activate devices such as
gate operators, garage door openers, entry door
locks, security systems and home lighting. Additional
HomeLink
®information can be found on the internet at
www.homelink.com or by calling 1-800-355-3515.
2-46

If your vehicle is equipped with the HomeLink®
Transmitter, it complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference,
and (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, and
(2) this device must accept any interference, including
interference that may cause undesired operation of
the device.
Changes and modications to this system by other than
an authorized service facility could void authorization
to use this equipment.
Programming the
HomeLink
®Transmitter
Do not use the HomeLink®Transmitter with any garage
door opener that does not have the “stop and reverse”
feature. This includes any garage door opener model
manufactured before April 1, 1982. If you have a newer
garage door opener with rolling codes, please be
sure to follow steps 6 through 8 to complete the
programming of your HomeLink
®Transmitter.Read the instructions completely before attempting to
program the HomeLink
®Transmitter. Because of
the steps involved, it may be helpful to have another
person available to assist you in programming
the transmitter.
Keep the original transmitter for use in other vehicles as
well as for future HomeLink
®programming. It is also
recommended that upon the sale of the vehicle,
the programmed HomeLink
®buttons should be erased
for security purposes. Refer to “Erasing HomeLink®
Buttons” or, for assistance, contact HomeLink®on
the internet at: www.homelink.com or by calling
1-800-355-3515.
Be sure that people and objects are clear of the garage
door or gate operator you are programming. When
programming a garage door, it is advised to park outside
of the garage.
It is recommended that a new battery be installed in
your hand-held transmitter for quicker and more
accurate transmission of the radio frequency.
2-47

Convenience Net
The convenience net attaches to the oor and back wall
of the trunk using four anchor points allowing for two
positions. The net can be attached like a hammock
or anchored to lay at across the oor of the trunk. Put
small loads, like grocery bags, behind the net. It can
help keep them from falling over during sharp turns or
quick starts and stops.
The net is not for larger, heavier loads. Store them in the
trunk as far forward as you can. When not using the net,
hook the net to the tabs securing it to the sill plate.
Sunroof
Your vehicle may have a power sunroof.
The sunroof controls
are located on the
overhead console.
@(Half Open):Turn the control clockwise to
this position to open the glass panel half way. The
sunshade will open with the glass panel, or it can be
opened manually.
P(Comfort Stop):Turn the control clockwise to
this position to open the glass panel about three
quarters of the way open. The sunshade will open with
the glass panel, or it can be opened manually.
This is called the comfort stop position. It provides less
wind noise than the full-open position.
A(Full Open):Turn the control clockwise to this
position to open the glass panel all the way. The
sunshade will open with the glass panel, or it can be
opened manually.
I(Vent):Turn the control counterclockwise to this
position to use the vent feature. The glass panel
will tilt upward from the vehicle. The sunshade must be
opened manually.
?(Close):Turn the control to this position to close
the sunroof. The sunshade must be closed manually.
2-52

Instrument Panel Overview...............................3-4
Hazard Warning Flashers................................3-6
Other Warning Devices...................................3-7
Horn.............................................................3-7
Tilt Wheel.....................................................3-7
Recongurable Steering Wheel
Controls (SWC) (CTS).................................3-8
Turn Signal/Multifunction Lever.......................3-10
Windshield Wiper Lever.................................3-21
Cruise Control..............................................3-23
Exterior Lamps.............................................3-24
Interior Lamps..............................................3-26
Accessory Power Outlets...............................3-27
Ashtrays and Cigarette Lighter........................3-28
Climate Controls............................................3-29
Dual Climate Control System..........................3-29
Outlet Adjustment.........................................3-34
Passenger Compartment Air Filter...................3-35
Steering Wheel Climate Controls (CTS)............3-36
Warning Lights, Gages, and Indicators............3-37
Instrument Panel Cluster................................3-38
Speedometer and Odometer...........................3-40
Tachometer.................................................3-41Safety Belt Reminder Light.............................3-41
Airbag Readiness Light..................................3-42
Charging System Light..................................3-43
Brake System Warning Light..........................3-43
Anti-Lock Brake System Warning Light.............3-44
Traction Control System (TCS)
Warning Light...........................................3-45
Engine Coolant Temperature
Warning Light (CTS)..................................3-45
Engine Coolant Temperature Gage..................3-46
Tire Pressure Light (CTS-V) ...........................3-46
Malfunction Indicator Lamp.............................3-47
Oil Pressure Light.........................................3-49
Winter Driving Mode Light
(Automatic Transmission)............................3-50
Sport Mode Light (Automatic Transmission)......3-50
Security Light...............................................3-51
Fog Lamp Light............................................3-51
Lights On Reminder......................................3-51
Cruise Control Light......................................3-52
Highbeam On Light.......................................3-52
Fuel Gage...................................................3-52
Section 3 Instrument Panel
3-1

Security Light
For information
regarding this light,
seeTheft-Deterrent
System on page 2-18.
Fog Lamp Light
This light will come on
when the fog lamps
are in use.
The light will go out when the fog lamps are turned off.
See “Fog Lamps” underTurn Signal/Multifunction
Lever on page 3-10for more information.
Lights On Reminder
This light comes on whenever the parking lamps are on.
See “Headlamps On Reminder” underTurn Signal/
Multifunction Lever on page 3-10for more information.
CTSCTS-V
3-51