ECU CADILLAC DEVILLE 2004 8.G Service Manual

Coolant Surge Tank Pressure Cap
Notice:If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
Engine Overheating
You will nd an ENGINE COOLANT HOT, IDLE
ENGINE message or an ENGINE OVERHEATED,
STOP ENGINE message displayed in the Driver
Information Center (DIC). You will also hear a chime.
There is also an engine temperature warning light and/or
gage on the instrument panel cluster. SeeEngine
Coolant Temperature Warning Light on page 3-54and
Engine Coolant Temperature Gage on page 3-54.
Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the
message ENGINE OVERHEATED, STOP ENGINE is
displayed, an overheat protection mode which alternates
ring groups of cylinders helps prevent engine damage.
In this mode, you will notice a loss in power and
engine performance. This operating mode allows your
vehicle to be driven to a safe place in an emergency;
you may drive up to 50 miles (80 km). Driving extended
miles (km) and/or towing a trailer in the overheat
protection mode should be avoided.
Notice:After driving in the overheated engine
protection operating mode, to avoid engine damage,
allow the engine to cool before attempting any repair.
The engine oil will be severely degraded. Repair the
cause of coolant loss, change the oil and reset the oil
life system. SeeEngine Oil on page 5-15.
5-31

{CAUTION:
A battery that is not properly vented can let
sulfuric acid fumes into the area under the rear
seat cushion. These fumes can damage your
rear seat safety belt systems. You may not be
able to see this damage, and the safety belts
might not provide the protection needed in a
crash. If a replacement battery is ever needed,
it must be vented in the same manner as the
original battery. Always make sure that the
vent hose is properly reattached before
reinstalling the seat cushion.
To be sure the vent hose (A) is properly attached, the
vent hose connectors (B) must be securely reattached to
the vent outlets (C) on each side of the battery, and
the vent assembly grommet (D) must be secured to the
oor pan (E).
5-47

Tire Chains
{CAUTION:
If your vehicle has P235/55R17 size tires, don’t
use tire chains, there’s not enough clearance.
Tire chains used on a vehicle without the
proper amount of clearance can cause damage
to the brakes, suspension or other vehicle
parts. The area damaged by the tire chains
could cause you to lose control of your vehicle
and you or others may be injured in a crash.
Use another type of traction device only if its
manufacturer recommends it for use on your
vehicle and tire size combination and road
conditions. Follow that manufacturer’s
instructions.
CAUTION: (Continued)
CAUTION: (Continued)
To help avoid damage to your vehicle, drive
slowly, readjust or remove the device if it’s
contacting your vehicle, and don’t spin your
wheels.
If you do nd traction devices that will t,
install them on the front tires.
Notice:If your vehicle has a tire size other than
P235/55R17 size tires, use tire chains only where
legal and only when you must. Use only SAE Class
“S” type chains that are the proper size for your
tires. Install them on the front tires and tighten them
as tightly as possible with the ends securely
fastened. Drive slowly and follow the chain
manufacturer’s instructions. If you can hear the
chains contacting your vehicle, stop and retighten
them. If the contact continues, slow down until
it stops. Driving too fast or spinning the wheels with
chains on will damage your vehicle.
5-84

To reinstall the rear seat cushion, do the following:
{CAUTION:
A safety belt that isn’t properly routed through
the seat cushion or is twisted won’t provide
the protection needed in a crash.
CAUTION: (Continued)
CAUTION: (Continued)
If the safety belt hasn’t been routed through
the seat cushion at all, it won’t be there to
work for the next passenger. The person
sitting in that position could be badly injured.
After reinstalling the seat cushion, always
check to be sure that the safety belts are
properly routed and are not twisted.
1. Buckle the center passenger position safety belt,
then route the safety belts through the proper slots
in the seat cushion. Do not let the safety belts
get twisted.
2. Slide the rear of the cushion up and under the
seatback so the rear-locating guides hook into
the wire loops on the back frame.
3. With the seat cushion lowered, push rearward and
then press down on the seat cushion until the
spring locks on both ends engage.
4. Check to make sure the safety belts are properly
routed and that no portion of any safety belt is
trapped under the seat. Also make sure the seat
cushion is secured.
5-111

Cassette Tape Messages...............................3-107
Cassette Tape Player Service...........................6-10
CD Changer, Glovebox-Mounted......................3-110
CD Messages.............................3-97, 3-109, 3-113
Cellular Phone Usage....................................3-116
Cellular Telephone, Storage Area......................2-51
Center Console Storage Area...........................2-51
Center Flex Storage Unit.................................2-52
Center Front Passenger Position, Safety Belts.......1-20
Center High-Mounted Stoplamp (CHMSL)...........5-64
Chains, Tires..................................................5-84
Charging System Light....................................3-51
Check
Engine Light...............................................3-55
Checking Coolant............................................5-29
Checking Engine Oil........................................5-16
Checking Things Under the Hood......................5-12
Chemical Paint Spotting.................................5-104
Child Restraints
Child Restraint Systems...............................1-35
Infants and Young Children...........................1-31
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-42
Older Children.............................................1-29
Securing a Child Restraint Designed for the
LATCH System........................................1-44Child Restraints (cont.)
Securing a Child Restraint in a Rear Seat
Position..................................................1-44
Securing a Child Restraint in the Right Front
Seat Position...........................................1-47
Top Strap...................................................1-40
Top Strap Anchor Location............................1-41
Where to Put the Restraint...........................1-38
Cigarette Lighter.....................................3-31, 3-32
Cleaning
Inside of Your Vehicle..................................5-98
Outside of Your Vehicle..............................5-101
Underbody Maintenance.............................5-104
Weatherstrips............................................5-101
Cleaning Aluminum or Chrome-Plated Wheels.....5-103
Cleaning Exterior Lamps/Lenses......................5-102
Cleaning Fabric/Carpet....................................5-98
Cleaning Glass Surfaces................................5-100
Cleaning Leather............................................5-99
Cleaning the Interior Plastic Components..........5-100
Cleaning the Mirror.................................2-39, 2-41
Cleaning the Speaker Covers..........................5-100
Cleaning the Top of the Instrument Panel.........5-100
Cleaning Tires..............................................5-103
Cleaning Vinyl................................................5-99
Cleaning Windshield and Wiper Blades............5-102
Cleaning Wood Panels...................................5-100
3

Display Mode.................................................3-48
Diversity Antenna System...............................3-118
Doing Your Own Service Work........................... 5-4
Dolly Towing..................................................4-35
Door
Central Door Unlocking System....................... 2-9
Locks.......................................................... 2-8
Power Door Locks......................................... 2-9
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-10
Doors Lock in Gear.........................................3-83
Doors Unlock in PARK (P)................................3-86
Doors Unlock Key Off......................................3-86
Driver
Position, Safety Belt.....................................1-13
Driver Information Center (DIC).........................3-62
Climate Controls and Radio System
Personalization........................................3-73
DIC Controls and Displays............................3-62
DIC Vehicle Personalization..........................3-74
DIC Warnings and Messages........................3-65
Driver Unlock in PARK (P)................................3-84
Driver Unlock Key Off......................................3-85
Driver’s Name Set/Recall.................................3-88
Driving
At Night.....................................................4-17
City...........................................................4-22Driving (cont.)
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-23
Hill and Mountain Roads..............................4-26
In Rain and on Wet Roads...........................4-19
Winter........................................................4-28
Driving on Grades...........................................4-47
Driving on Snow or Ice....................................4-29
Driving Through Deep Standing Water...............4-21
Driving Through Flowing Water.........................4-21
Driving with a Trailer.......................................4-46
Dual Climate Control System............................3-32
E
Electrical System
Add-On Equipment.....................................5-107
Fuses and Circuit Breakers.........................5-108
Headlamp Wiring.......................................5-107
Power Windows and Other Power Options.......5-107
Removing the Rear Seat Cushion................5-110
Windshield Wiper Fuses.............................5-107
Emergency Trunk Release Handle.....................2-14
Emissions Inspection and Maintenance
Programs...................................................3-58
5

L
Lamps
Exterior......................................................3-17
Interior.......................................................3-22
Lamps on Reminder........................................3-18
Lap Belt........................................................1-21
Lap-Shoulder Belt...................................1-13, 1-22
LATCH System
Child Restraints...........................................1-42
Securing a Child Restraint Designed for the
LATCH System........................................1-44
Leaving Your Vehicle.......................................2-11
Leaving Your Vehicle With the Engine Running......2-35
Light
Air Bag Readiness.......................................3-50
Anti-Lock Brake System Warning...................3-52
Brake System Warning and Parking Brake
Indicator.................................................3-51
Charging System.........................................3-51
Cruise Control.............................................3-60
Engine Coolant Temperature Warning.............3-54
Fog Lamp..................................................3-59
Lights On Reminder.....................................3-60
Malfunction Indicator....................................3-55Light (cont.)
Oil Pressure...............................................3-58
Safety Belt Reminder...................................3-49
Security.....................................................3-59
TCS Warning Light......................................3-53
Traction Control System (TCS) Warning..........3-53
Lighted Rear Vanity Mirror................................2-18
Lighted Visor Vanity Mirror...............................2-18
Lights Flash at Lock........................................3-80
Lights Flash at Unlock.....................................3-79
Loading Your Vehicle.......................................4-35
Lockout Protection..........................................2-11
Locks
Central Door Unlocking System....................... 2-9
Door........................................................... 2-8
Leaving Your Vehicle....................................2-11
Lockout Protection.......................................2-11
Power Door.................................................. 2-9
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-10
Loss of Control...............................................4-16
Lumbar
Massaging Controls....................................... 1-3
Power Controls............................................. 1-2
Lumbar Controls, Rear Power............................ 1-6
9

Power (cont.)
Rear Lumbar Controls.................................... 1-6
Seat............................................................ 1-2
Steering Fluid.............................................5-40
Windows....................................................2-16
Power Steering...............................................4-11
Power Tilt Wheel and Telescopic Steering
Column........................................................ 3-8
Pretensioners, Safety Belt................................1-28
Programmable Automatic Door Locks.................2-10
Programming the HomeLink
®Transmitter...........2-47
Q
Questions and Answers About Safety Belts.........1-11
R
Radio Data System (RDS)...............................3-98
Radios..........................................................3-89
Care of Your Cassette Tape Player...............3-116
Care of Your CD Player..............................3-117
Care of Your CDs......................................3-117
DIC Personalization.....................................3-73
Glovebox-Mounted CD Changer...................3-110
Navigation/Radio System.............................3-110Radios (cont.)
Radio Personalization with Home and Away
Feature.................................................3-113
Radio with Cassette and CD.........................3-98
Radio with CD............................................3-90
Setting the Time for Radios with Radio Data
Systems (RDS)........................................3-90
Setting the Time for Radios without Radio
Data Systems (RDS)................................3-90
Theft-Deterrent..........................................3-114
Understanding Reception............................3-115
Rainsense™ II Wipers.....................................3-12
RDS Messages.............................................3-102
Reaching Roadside Service............................... 7-7
Reading Lamps..............................................3-24
Rear Ashtray..................................................3-32
Rear Climate Control System............................3-38
Rear Door Security Locks................................2-10
Rear Heated Seats........................................... 1-5
Rear Power Sunshade.....................................2-18
Rear Safety Belt Comfort Guides......................1-25
Rear Seat Pass Through.................................2-14
Rear Seat Passenger Positions.........................1-22
Rear Seat Passengers, Safety Belts..................1-22
Rear Storage Area..........................................2-53
Rear Storage Door Trim Armrest.......................2-53
Rear Underseat Fuse Block............................5-112
12

Safety Belts (cont.)
Rear Seat Passengers.................................1-22
Right Front Passenger Position......................1-20
Safety Belt Extender....................................1-28
Safety Belt Use During Pregnancy.................1-19
Safety Belts Are for Everyone......................... 1-7
Safety Chains.................................................4-45
Safety Warnings and Symbols.............................. iii
Scheduled Maintenance..................................... 6-4
Seats
Heated and Cooled Seats.............................. 1-3
Heated Seats, Rear....................................... 1-5
Massaging Lumbar........................................ 1-3
Memory.....................................................2-55
Power Lumbar.............................................. 1-2
Power Lumbar, Rear...................................... 1-6
Power Seats................................................. 1-2
Reclining Seatbacks...................................... 1-4
Securing a Child Restraint
Designed for the LATCH System...................1-44
Rear Seat Position......................................1-44
Right Front Seat Position..............................1-47
Security Light.................................................3-59
Sensors.........................................................3-36
Service........................................................... 5-3
Adding Equipment to the Outside of Your
Vehicle..................................................... 5-5Service (cont.)
Doing Your Own Work................................... 5-4
Engine Soon Light.......................................3-55
Publications Ordering Information...................7-12
Service Bulletins.............................................7-13
Service Engine Soon Light in the United States
or Check Engine Light in Canada..................3-55
Service Manuals.............................................7-12
Setting Preset Stations...........................3-92, 3-100
Setting the Time
Radios with Radio Data Systems (RDS).........3-90
Radios without Radio Data Systems (RDS).....3-90
Setting the Tone (Bass/Treble)................3-92, 3-100
Sheet Metal Damage.....................................5-103
Shift Lock Release..........................................2-32
Shifting Into Park (P).......................................2-33
Shifting Out of Park (P)...................................2-36
Skidding........................................................4-16
Some Other Rainy Weather Tips.......................4-22
Special Fabric Cleaning Problems.....................5-99
Specications, Capacities...............................5-115
Speedometer..................................................3-47
Starting Your Engine.......................................2-26
Steering........................................................4-11
Steering Column Shift Lever.............................2-34
Steering in Emergencies..................................4-13
Steering Tips..................................................4-12
14