2010 CADILLAC DTS ECU

When the system check is complete, either the wordON or OFF, or the symbol for on or off, will be visible.SeePassenger Airbag Status Indicator on page 4-51.
The passenger sensing system turns off the rightfront passenger frontal airbag and seat-mounted sideimpact airbag under certain conditions. The driverairbags and the roof-rail airbags are not affected by thepassenger sensing system.
The passenger sensing system works with sensors thatare part of the right front passenger seat. The sensorsare designed to detect the presence of a properly-seatedoccupant and determine if the right front passengerfrontal airbag and seat-mounted side impact airbagshould be enabled (may inflate) or not.
According to accident statistics, children are safer whenproperly secured in a rear seat in the correct childrestraint 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-facingchild restraint; a child riding in a forward-facing childseat; 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-facingchild seat in the front.” This is because the risk tothe rear-facing child is so great, if the airbag deploys.
{WARNING:
A child in a rear-facing child restraint can be
seriously injured or killed if the right front passenger
airbag inflates. This is because the back of the
rear-facing child restraint would be very close to the
inflating airbag. A child in a forward-facing child
restraint can be seriously injured or killed if the right
front passenger airbag inflates 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.
2-68

If the On Indicator is Lit for a Child
Restraint
If a child restraint has been installed and the onindicator is lit:
1. Turn the vehicle off.
2. Remove the child restraint from the vehicle.
3. Remove any additional items from the seat such asblankets, cushions, seat covers, seat heaters, orseat massagers.
4. Reinstall the child restraint following the directionsprovided by the child restraint manufacturer andrefer toSecuring a Child Restraint in the Right FrontSeat Position on page 2-54.
5. If, after reinstalling the child restraint and restartingthe vehicle, the on indicator is still lit, turn thevehicle off. Then slightly recline the vehicle seatbackand adjust the seat cushion, if adjustable, tomake sure that the vehicle seatback is not pushingthe child restraint into the seat cushion.
Also make sure the child restraint is not trappedunder the vehicle head restraint. If this happens,adjust the head restraint. SeeHead Restraintson page 2-2.
6. Restart the vehicle.
If the on indicator is still lit, secure the child in thechild restraint in a rear seat position in the vehicle,and check with your dealer/retailer.
2-70

Adding Equipment to Your
Airbag-Equipped Vehicle
Q:Is there anything I might add to or changeabout the vehicle that could keep the airbagsfrom 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 2-67.
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 8-2.
Q:Because I have a disability, I have to getmy vehicle modified. How can I find out whetherthis 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 8-2.
In addition, your dealer/retailer and the service manualhave information about the location of the airbagsensors, sensing and diagnostic module andairbag wiring.
2-73

Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3Remote Keyless Entry (RKE) System . . . . . . . . . . . . . . . .3-4Remote Keyless Entry (RKE) SystemOperation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4Remote Vehicle Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Doors and Locks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9Central Door Unlocking System . . . . . . . . . . . . . . . . . . . . . .3-10Power Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10Programmable Automatic Door Locks . . . . . . . . . . . . . .3-10Rear Door Security Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10Lockout Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Windows. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14Power Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-17
Theft-Deterrent Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18Valet Lockout Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18Content Theft-Deterrent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19PASS-Key®III+ Electronic Immobilizer . . . . . . . . . . . . .3-21PASS-Key®III+ Electronic ImmobilizerOperation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-21
Starting and Operating Your Vehicle. . . . . . . . . . . . . . . .3-22New Vehicle Break-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22Ignition Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23Retained Accessory Power (RAP) . . . . . . . . . . . . . . . . . . .3-24Starting the Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-24Engine Coolant Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-26Automatic Transmission Operation . . . . . . . . . . . . . . . . . . .3-27Performance Shifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-29Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-30Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-31Shifting Out of Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-32Parking Over Things That Burn . . . . . . . . . . . . . . . . . . . . . . .3-33Engine Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-34Running the Vehicle While Parked . . . . . . . . . . . . . . . . . .3-35
Mirrors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-36Automatic Dimming Rearview Mirror . . . . . . . . . . . . . . . .3-36Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-36Outside Power Foldaway Mirrors . . . . . . . . . . . . . . . . . . . . .3-37Outside Automatic Dimming Mirror . . . . . . . . . . . . . . . . . .3-38Park Tilt Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-39Outside Convex Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-39Outside Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-39
Section 3 Features and Controls
3-1

After entering the vehicle during a remote start, insertand turn the key to ON/RUN to drive the vehicle.
If the vehicle is left running it will automatically shut offafter 10 minutes unless a time extension has been done.
To manually shut off a remote start:
•Aim the RKE transmitter at the vehicle and press
the remote start button until the parking lampsturn off.
•Turn on the hazard warning flashers.
•Turn the ignition switch on and then off.
The remote vehicle start feature provides two separatestarts, each with 10 minutes of engine running, or itprovides one start with 10 minutes of engine running thatmay be extended 10 more minutes. If you press andrelease the transmitter lock button and then press andhold the remote start button on the RKE transmitteragain before the first 10 minutes of engine running timehas expired, 10 minutes are added to the remainingminutes. For example, if the lock button and thenthe remote start buttons are pressed again afterfive minutes of the engine run time, 10 minutes areadded and you now have 15 minutes of engine running.The added ten minutes are considered a secondremote vehicle start.
Once two remote starts or a single start with a timeextension have been used, the vehicle must be startedwith the ignition key before you can use the remotestart feature again.
The remote vehicle start feature will not operate if thekey is in the ignition, the hood is not closed, or if there isan emission control system malfunction.
The engine will turn off during a remote vehicle start ifthe coolant temperature gets too high, or the oil pressureis too low.
Your vehicle was shipped from the factory with theremote vehicle start system enabled. The system maybe disabled through the Driver Information Center (DIC).See “REMOTE START” underDIC VehicleCustomization on page 4-80for additional information.
SeeEngine Exhaust on page 3-34for important safetyinformation when using remote start in a closed garage.
Remote Start Ready
If your vehicle does not have the remote vehicle startfeature, it may have the remote start ready feature.This feature allows your dealer/retailer to add themanufacturer’s remote vehicle start feature. See yourdealer/retailer if you would like to add the manufacturer’sremote vehicle start feature to your vehicle.
3-8

Central Door Unlocking System
The vehicle has a central door unlocking mode. Whenunlocking the driver door, the other doors can beunlocked at the same time by turning the key clockwisein the door lock cylinder twice.
Power Door Locks
On vehicles with power door locks, the switches arelocated on the front doors.
"(Unlock):Press to unlock the doors.
Q(Lock):Remove the key from the ignition and press
to lock the doors.
Programmable Automatic Door
Locks
The vehicle is programmed so that, when the doors areclosed, the ignition is on, and the shift lever is movedout of P (Park), all the doors will lock. The doorswill unlock every time the vehicle is stopped and theshift lever is moved into P (Park).
If someone needs to get out while the vehicle is not inP (Park), have the person use the manual lock knobor power door lock switch. When the door is closedagain, it will not lock automatically. Use the manual lockknob or power door lock switch to lock the door.
The door locks can be programmed through promptsdisplayed on the Driver Information Center (DIC). Theseprompts allow the driver to choose various lock andunlock settings. For programming information, seeDIC Vehicle Customization on page 4-80.
Rear Door Security Locks
Rear door security locks prevent passengers fromopening the rear doors from the inside.
The rear door security locks are located on the insideedge of each rear door. The rear doors must be openedto access them.
3-10

To assist in finding the lock, the vehicle hasthe following:
To use the lock:
1. Insert the key into the security lock slot and turn itso the slot is in the horizontal position.
2. Close the door.
3. Do the same for the other rear door.
To open a rear door when the security lock is on, dothe following:
1. Unlock the door using the Remote Keyless Entry(RKE) transmitter, if the vehicle has one, thepower door lock switch, or by lifting the rear doormanual lock.
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. Insert the key into the security lock slot and turn itso the slot is in the vertical position.
3. Do the same for the other rear door.
Lockout Protection
If the key is in the ignition and the power door lockswitch is used to lock the doors, all doors will lock andthen the driver door will unlock. It is alwaysrecommended that the ignition key is removed from thevehicle when locking the doors.
The lockout protection feature can be overridden byholding the power door lock switch for three secondsor longer.
3-11

Emergency Trunk Release Handle
Notice:Do not use the emergency trunk releasehandle as a tie-down or anchor point when securingitems in the trunk as it could damage the handle.The emergency trunk release handle is onlyintended 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 releasehandle located inside the trunk near the latch. Thishandle will glow following exposure to light. Pullthe release handle to open the trunk from the inside.
Rear Seat Pass-Through
The vehicle has a small door in the rear seat. This doorallows access to the trunk from inside the vehicle.
The rear seat armrest must be down for thepass-through door to open. To release the pass-throughdoor, move the release up. To close the door, raise itand push it until it latches.
3-13