2008 CADILLAC CTS battery replacement

If there is a decrease in the RKE operating range,
try this:
Check the distance. The transmitter may be too
far from the vehicle. Stand closer during rainy
or snowy weather.
Check the location. Other vehicles or objects may
be blocking the signal. Take a few steps to the
left or right, hold the transmitter higher, and
try again.
Check the transmitter’s battery. See “Battery
Replacement” later in this section.
If the transmitter is still not working correctly, see
your dealer/retailer or a qualied technician for
service.
Remote Keyless Entry (RKE)
System Operation
The Remote Keyless Entry (RKE) transmitter functions
work up to 65 feet (20 m) away.
There are other conditions which can affect the
performance of the transmitter. SeeRemote Keyless
Entry (RKE) System on page 2-6.
Q(Lock):Press to lock all the doors. If enabled
through the Driver Information Center (DIC), the parking
lamps may ash once to indicate locking has occurred,
or the horn may chirp when
Qis pressed again within
ve seconds from the previous press of the lock button.
SeeDIC Vehicle Customization on page 3-69for
additional information.
2-7

"(Unlock):Press to unlock the driver’s door. If"is
pressed again within ve seconds, all remaining doors
unlock. The interior lamps come on and stay on for
20 seconds or until the ignition is turned on. If enabled
through the DIC, the parking lamps ash twice to indicate
unlocking has occurred. SeeDIC Vehicle Customization
on page 3-69.
V(Remote Trunk Release):Press and hold
for about one second to release the trunk lid.
The transmission must be in PARK (P).
L(Vehicle Locator/Panic Alarm):Press and release
to locate the vehicle. The turn signal lamps ash and
the horn sounds three times.
Press and hold
Lfor more than two seconds to
activate the panic alarm. The turn signal lamps ash
and the horn sounds for 30 seconds. The alarm turns off
when the ignition is moved to START or
Lis pressed
again. The ignition must be in LOCK/OFF for the
panic alarm to work.
Matching Transmitter(s) to Your
Vehicle
Each RKE transmitter is coded to prevent another
transmitter from unlocking the vehicle. If a transmitter is
lost or stolen, a replacement can be purchased through
your dealer/retailer. All transmitters need to be re-coded
to match the new transmitter.
The lost transmitter no longer works after the new
transmitters are re-coded. The vehicle can have a
maximum of eight transmitters matched to it. See
“Relearn Remote Key” underDIC Operation and
Displays on page 3-48.
Battery Replacement
Replace the battery if the Replace Battery In Remote
Key message displays in the DIC. See “Replace Battery
In Remote Key” underDIC Warnings and Messages
on page 3-56for additional information.
Notice:When replacing the battery, do not touch
any of the circuitry on the transmitter. Static
from your body could damage the transmitter.
2-8

If you ever notice a decrease in the keyless access
transmitter range, try doing one of the following:
Check the distance. You may be too far from your
vehicle. You may need to stand closer during
rainy or snowy weather.
Check the location. Other vehicles or objects may
be blocking the signal. Take a few steps to the
left or right, hold the transmitter higher, and
try again.
Check to determine if battery replacement is
necessary. See “Battery Replacement” under
Keyless Access System Operation on page 2-10.
Check to make sure that an electronic device such
as a cellular phone or lap top computer is not
causing interference.
If you are still having trouble, see your dealer/retailer
or a qualied technician for service.
Keyless Access System Operation
The Keyless Access System transmitter functions
will work up to 195 feet (60 m) away, however, the
operating range may be less while the vehicle is running.
The Keyless Access System also lets you lock and
unlock the vehicle’s doors and access the trunk without
removing the remote transmitter from your pocket, purse,
briefcase, etc. The system operates when a front door
handle is pulled or the remote trunk release button is
pressed. You must have the keyless access transmitter
with you and within 3 feet (1 m) of the door or trunk you
are opening. See “Keyless Locking” and “Keyless Unlock”
underDIC Vehicle Customization on page 3-69.
There are other conditions which can affect the
performance of the transmitter. SeeKeyless Access
System on page 2-9.
2-10

Battery Replacement
Replace the battery if the Replace Battery In Remote
Key message displays in the DIC. See “Replace Battery
In Remote Key” underDIC Warnings and Messages
on page 3-56for additional information.
A weak battery may also cause the DIC to display
Electronic Key Not Detected when you try to start the
vehicle. If this happens, place the transmitter in the
center console storage area transmitter pocket with the
buttons facing to the front of the vehicle. Then, with
the vehicle in PARK (P) or NEUTRAL (N), press
the brake pedal and the ignition control knob. See
Starting the Engine on page 2-35, for additional
information about your vehicle’s electronic keyless
ignition with push start. Although this will start the
vehicle, it is recommended that you replace the
transmitter battery as soon as possible.
Notice:When replacing the battery, do not touch
any of the circuitry on the transmitter. Static
from your body could damage the transmitter.To replace the battery:
1. Separate the halves of the transmitter with a at,
thin object inserted into the slot on the side or
back of the transmitter.
2. Remove the old battery. Do not use a metal object.
3. Insert the new battery, positive side facing down.
Replace with a CR2032 or equivalent battery.
4. Put the transmitter back together tightly.
2-15

Retained Accessory Power (RAP)
These vehicle accessories can be used for up to
10 minutes after the engine is turned off:
Audio System
Power Windows
Sunroof (if equipped)
Power to the audio system will work up to 10 minutes or
until the driver’s door is opened. Power to the windows
or sunroof will work up to 10 minutes or until any
door is opened. For an additional 10 minutes of
operation, close all the doors and turn the key to
ON/RUN and then back to LOCK/OFF.
Starting the Engine
Place the transmission in the proper gear.
Automatic Transmission
Move the shift lever to PARK (P) or NEUTRAL (N).
The engine will not start in any other position -- this
is a safety feature. To restart when you are already
moving, use NEUTRAL (N) only.If your vehicle has the keyless access system, put your
foot on the brake pedal and turn the ignition control
knob to the START position. When the engine begins
cranking, let go of the ignition control knob, it will return
to the ON/RUN position.
If the transmitter is not in the vehicle or something is
interfering with the transmitter, the Driver Information
Center (DIC) will display Electronic Key Not Detected.
SeeDIC Warnings and Messages on page 3-56for
more information.
If the battery in the keyless access transmitter needs
replacing, the DIC displays Replace Battery In Remote
Key. The vehicle can still be driven. See “Battery
Replacement” underKeyless Access System Operation
on page 2-10for more information.
Notice:Do not try to shift to P (Park) if your
vehicle is moving. If you do, you could damage
the transmission. Shift to P (Park) only when your
vehicle is stopped.
2-35

Press Brake To Start Engine
(Automatic Transmission Only)
If your vehicle has the keyless access system, this
message displays if you try to start the engine without
having the brake pressed. The brake needs to be
pressed when starting the engine. SeeIgnition Positions
(Key Access) on page 2-32orIgnition Positions
(Keyless Access) on page 2-34for more information.
Press Start Control To Learn Keys
If your vehicle has the keyless access system, this
message displays when matching new transmitters to
the vehicle. SeeKeyless Access System Operation
on page 2-10for more information.
Rainsense Wipers Active
If your vehicle has this feature, this message
displays while the Rainsense™ wipers are active.
SeeRainsense™ Wipers on page 3-10for
more information.
Ready To Learn Electronic Key # X
If your vehicle has the keyless access system, this
message displays while matching new transmitters to
the vehicle. SeeKeyless Access System Operation
on page 2-10for more information.
Remote Key Learning Active
If your vehicle has the Remote Keyless Entry (RKE)
system, this message displays while matching new
transmitters to the vehicle. See “Matching Transmitter(s)
to Your Vehicle” underRemote Keyless Entry (RKE)
System Operation on page 2-7andDIC Operation and
Displays on page 3-48for more information.
Replace Battery In Remote Key
This message displays when the battery in the Remote
Keyless Entry (RKE) or keyless access transmitter
needs to be replaced. To replace the battery, see
“Battery Replacement” underRemote Keyless Entry
(RKE) System Operation on page 2-7orKeyless Access
System Operation on page 2-10.
Right Rear Door Open
This message displays when the passenger side rear
door is not closed completely. Make sure that the door is
closed completely.
3-63

Service............................................................5-4
Accessories and Modications..........................5-4
California Proposition 65 Warning.....................5-5
California Perchlorate Materials Requirements.....5-5
Doing Your Own Service Work.........................5-5
Adding Equipment to the Outside of the
Vehicle......................................................5-6
Fuel................................................................5-6
Gasoline Octane............................................5-7
Gasoline Specications....................................5-7
California Fuel...............................................5-7
Additives.......................................................5-8
Fuels in Foreign Countries...............................5-8
Filling the Tank..............................................5-9
Filling a Portable Fuel Container.....................5-11
Checking Things Under the Hood....................5-12
Hood Release..............................................5-12
Engine Compartment Overview.......................5-14
Engine Oil...................................................5-16
Engine Oil Life System..................................5-19
Engine Cover...............................................5-21
Engine Air Cleaner/Filter................................5-21
Automatic Transmission Fluid.........................5-25
Manual Transmission Fluid.............................5-26Hydraulic Clutch...........................................5-27
Engine Coolant.............................................5-28
Coolant Surge Tank Pressure Cap..................5-31
Engine Overheating.......................................5-31
Overheated Engine Protection
Operating Mode........................................5-33
Cooling System............................................5-34
Power Steering Fluid.....................................5-39
Windshield Washer Fluid................................5-40
Brakes........................................................5-41
Battery........................................................5-44
Jump Starting...............................................5-45
All-Wheel Drive..............................................5-50
Rear Axle.......................................................5-51
Headlamp Aiming...........................................5-52
Bulb Replacement..........................................5-55
High Intensity Discharge (HID) Lighting............5-55
Halogen Bulbs..............................................5-55
Front Turn Signal and Fog Lamps...................5-56
License Plate Lamp......................................5-56
Replacement Bulbs.......................................5-57
Windshield Wiper Blade Replacement..............5-57
Section 5 Service and Appearance Care
5-1

Battery
Your vehicle has a maintenance free battery. It is
located in the trunk, behind the trim panel, on the
passenger side of the vehicle. When it is time for a
new battery, see your dealer/retailer for one that has
the replacement number shown on the original battery’s
label.
Warning:Battery posts, terminals, and related
accessories contain lead and lead compounds,
chemicals known to the State of California to cause
cancer and reproductive harm. Wash hands after
handling.
After a power loss, such as disconnecting the battery or
removing the maxi fuses in the power distribution fuse
block, the following steps must be performed to calibrate
the electronic throttle control. If this is not done, the
engine will not run properly.
1. Turn the ignition to ON/RUN. Do not start the
engine.
2. Leave the ignition in ON/RUN for at least
three minutes so that the electronic throttle
control will cycle and re-learn its home position.
3. Turn the ignition to LOCK/OFF.
4. Start and run the engine for at least 30 seconds.
Vehicle Storage
{CAUTION:
Batteries have acid that can burn you and gas
that can explode. You can be badly hurt if you
are not careful. SeeJump Starting on page 5-45
for tips on working around a battery without
getting hurt.
Infrequent Usage: If you drive your vehicle infrequently,
remove the black, negative (−) cable from the battery.
This will help keep the battery from running down.
Extended Storage: For extended storage of your vehicle,
remove the black, negative (−) cable from the battery
or use a battery trickle charger. This will help maintain
the charge of the battery over an extended period
of time.
5-44