ignition CADILLAC DTS 2010 1.G Service Manual

Reading Lamps
The reading lamps are located on the overhead consoleon the headliner and in the rear door opening. Theselamps come on automatically when any door is openedand it is dark outside.
For manual operation, press the button to turn them on.Press it again to turn them off.
If the reading lamps are left on, they automatically shutoff 10 minutes after the ignition has been turned off.
Footwell Lamps
For vehicles with footwell lamps, they are located underthe instrument panel and at the rear of the frontseats. These lamps provide soft light to the front andrear floor areas. They dim with the instrument panelcluster lights.
Footwell lighting brightness can be adjusted with theinstrument panel brightness control located belowthe exterior lamps control. SeeInstrument PanelBrightness on page 4-31. The footwell lights will turn offbefore the instrument panel lights are at their lowestlevel of brightness.
Battery Load Management
This feature monitors the vehicle’s electrical load anddetermines when the battery is in a heavy dischargecondition. During times of high electrical loading,the engine may idle at a higher revolutions per minute(rpm) setting than normal to make sure the batterycharges. High electrical loads may occur when severalof the following are on: headlamps, high beams, foglamps, rear window defogger, the climate control fan athigh speeds, heated seats and engine cooling fans.
If the battery continues to discharge, even withthe engine idling at a higher rpm setting, some electricalloads will automatically be reduced. When this occurs,the rear window defogger may take slightly longerto clear the glass, the heated seats may not get as warmas they usually do and the climate control fan may cutback to a lower speed. For more battery savinginformation, see “Battery Saver Active Message” underDIC Warnings and Messages on page 4-67.
4-32

Electric Power Management
The vehicle has Electric Power Management (EPM) thatestimates the battery’s temperature and state ofcharge. It then adjusts the voltage for best performanceand extended life of the battery.
When the battery’s state of charge is low, the voltage israised slightly to quickly bring the charge back up.When the state of charge is high, the voltage is loweredslightly to prevent overcharging. If the vehicle has avoltmeter gage or a voltage display on the DriverInformation Center (DIC), you may see the voltage moveup or down. This is normal. If there is a problem, analert will be displayed.
The battery can be discharged at idle if the electricalloads are very high. This is true for all vehicles. This isbecause the generator (alternator) may not bespinning fast enough at idle to produce all the powerthat is needed for very high electrical loads.
A high electrical load occurs when several of thefollowing are on, such as: headlamps, high beams, foglamps, rear window defogger, climate control fan athigh speed, heated seats, engine cooling fans, trailerloads, and loads plugged into accessory power outlets.
EPM works to prevent excessive discharge of thebattery. It does this by balancing the generator’s outputand the vehicle’s electrical needs. It can increase
engine idle speed to generate more power, wheneverneeded. It can temporarily reduce the power demands ofsome accessories.
Normally, these actions occur in steps or levels, withoutbeing noticeable. In rare cases at the highest levelsof corrective action, this action may be noticeable to thedriver. If so, a Driver Information Center (DIC)message might be displayed, such as BATTERYSAVER ACTIVE, BATTERY VOLTAGE LOW, orLOW BATTERY. If this message is displayed, it isrecommended that the driver reduce the electrical loadsas much as possible. SeeDIC Warnings and Messageson page 4-67.
Inadvertent Power Battery Saver
This feature is designed to protect your vehicle’s batteryagainst drainage from the interior lamps, trunk lamp,glove box lamp, or the garage door opener. When theignition is turned off, the power to these features willautomatically turn off after 10 minutes. Power willbe restored for an additional 10 minutes if any door ortrunk is opened, or the courtesy lamp switch isturned on.
4-33

Battery Run-Down Protection
This feature helps prevent the battery from beingdrained, if the interior courtesy lamps, reading/maplamps, visor vanity lamps or trunk lamp are accidentallyleft on. If any of these lamps are left on, theyautomatically turn off after 10 minutes, if the ignition isoff. The lamps will not come back on again untilone of the following occurs:
•The ignition is turned on.
•The exterior lamps control is turned off, then on
again.
The headlamps will timeout after 10 minutes, if they aremanually turned on with the ignition on or off.
Accessory Power Outlet(s)
The accessory power outlets can be used to plug inelectrical equipment, such as a cellular telephone.
If the vehicle has a center console, the power outlet islocated inside the lower storage area. Some vehiclesmay have an outlet on the right front lower part ofthe driver’s seat and under the climate control systemnext to the ashtray. SeeCenter Console Storageon page 3-55.
There are two accessory power outlets in the rear seatarea located on the door armrests next to theashtrays.
There may be a small cap that must be removed toaccess the accessory power outlet. When not using theoutlet be sure to cover it with the protective cap.
The accessory power outlet can be used at any time.
Notice:Leaving electrical equipment plugged in foran extended period of time while the vehicle is offwill drain the battery. Power is always suppliedto the outlets. Always unplug electrical equipmentwhen not in use and do not plug in equipmentthat exceeds the maximum 20 ampere rating.
Certain accessory power plugs may not be compatibleto the accessory power outlet and could result inblown vehicle or adapter fuses. If you experience aproblem see your dealer/retailer for additionalinformation on the accessory power outlets.
Notice:Adding any electrical equipment to thevehicle can damage it or keep other componentsfrom working as they should. The repairs would notbe covered by the vehicle warranty. Do not useequipment exceeding maximum amperage rating of20 amperes. Check with your dealer/retailer beforeadding electrical equipment.
4-34

Charging System Light
This light comes on brieflywhen the ignition key isturned to START, butthe engine is not running,as a check to show itis working.
If it does not, have the vehicle serviced by yourdealer/retailer.
The light should go out once the engine starts. If it stayson, or comes on while driving, there could be aproblem with the charging system. A charging systemmessage in the Driver Information Center (DIC) can alsoappear. SeeDIC Warnings and Messages on page 4-67for more information. This light could indicate thatthere are problems with a generator drive belt, or thatthere is an electrical problem. Have it checked rightaway. If the vehicle must be driven a short distance withthe light on, turn off accessories, such as the radioand air conditioner.
Brake System Warning Light
The vehicle’s hydraulic brake system is divided intotwo parts. If one part is not working, the other part canstill work and stop the vehicle. For good brakingboth parts need to be working.
If the warning light comes on, there is a brake problem.Have the brake system inspected right away.
This light comes on briefly when the engine is turnedon. If it does not come on then, have it fixed so it will beready to warn if there is a problem.
When the ignition is on, the brake system warning lightalso comes on when the parking brake is set. Thelight will stay on if the parking brake does not releasefully. If it stays on after the parking brake is fullyreleased, it means there is a brake problem.
United StatesCanada
4-52

If the light comes on while driving, pull off the road andstop carefully.The pedal may be harder to push, orthe pedal may go closer to the floor. It may take longerto stop. If the light is still on, have the vehicle towedfor service. SeeTowing Your Vehicle on page 5-24.
{WARNING:
The brake system might not be working properly if
the brake system warning light is on. Driving with
the brake system warning light on can lead to a
crash. If the light is still on after the vehicle has
been pulled off the road and carefully stopped,
have the vehicle towed for service.
Antilock Brake System (ABS)
Warning Light
For vehicles with theAntilock Brake System(ABS), this light comes onbriefly when the engineis started.
If it does not, have the vehicle serviced by yourdealer/retailer. If the system is working normally theindicator light then goes off.
If the ABS light stays on, turn the ignition off. If the lightcomes on while driving, stop as soon as it is safelypossible and turn the ignition off. Then start the engineagain to reset the system. If the ABS light stays on,or comes on again while driving, the vehicle needsservice. If the regular brake system warning light is noton, the vehicle still has brakes, but not antilockbrakes. If the regular brake system warning light is alsoon, the vehicle does not have antilock brakes andthere is a problem with the regular brakes. SeeBrakeSystem Warning Light on page 4-52.
For vehicles with a Driver Information Center (DIC), seeDIC Warnings and Messages on page 4-67for allbrake related DIC messages.
4-53

When the Light Flashes First and Then is
On Steady
This indicates that there may be a problem with the TirePressure Monitor System. The light flashes for abouta minute and stays on steady for the remainder ofthe ignition cycle. This sequence repeats with everyignition cycle. SeeTire Pressure Monitor Operation onpage 6-58for more information.
Malfunction Indicator Lamp
Check Engine Light
A computer system called OBD II (On-BoardDiagnostics-Second Generation) monitors operation ofthe fuel, ignition, and emission control systems. Itensures that emissions are at acceptable levels for thelife of the vehicle, helping to produce a cleanerenvironment.
This light should come onwhen the ignition is on, butthe engine is not running,as a check to show itis working. If it does not,have the vehicle servicedby your dealer/retailer.
If the check engine light comes on and stays on, whilethe engine is running, this indicates that there is anOBD II problem and service is required.
Malfunctions often are indicated by the system beforeany problem is apparent. Being aware of the lightcan prevent more serious damage to the vehicle. Thissystem assists the service technician in correctlydiagnosing any malfunction.
Notice:If the vehicle is continually driven with thislight on, after a while, the emission controlsmight not work as well, the vehicle’s fuel economymight not be as good, and the engine might notrun as smoothly. This could lead to costly repairsthat might not be covered by the vehicle warranty.
Notice:Modifications made to the engine,transmission, exhaust, intake, or fuel system of thevehicle or the replacement of the original tireswith other than those of the same Tire PerformanceCriteria (TPC) can affect the vehicle’s emissioncontrols and can cause this light to come on.Modifications to these systems could lead to costlyrepairs not covered by the vehicle warranty. Thiscould also result in a failure to pass a requiredEmission Inspection/Maintenance test. SeeAccessories and Modifications on page 6-3.
4-57

The DIC comes on when the ignition is on. After a shortdelay, the DIC will display the information that waslast displayed before the engine was turned off.
The top line of the DIC display shows the vehicle systeminformation and the warning/status messages. Thebottom line of the DIC display shows the odometer onthe left side. The bottom line of the DIC display alsoshows a digital speedometer on the right side.
If a problem is detected, a warning message will appearon the display. Be sure to take any message thatappears on the display seriously and remember thatclearing the message will only make the messagedisappear, not correct the problem.
DIC Operation and Displays
The Driver InformationCenter (DIC) has differentdisplays which can beaccessed by pressing theDIC buttons located onthe instrument panel, to theleft of the steering wheel.
3Trip/Fuel:Press this button to scroll through the
trip and fuel displays. See “Trip/Fuel Display MenuItems” following for more information on these displays.
TVehicle Information:Press this button to scroll
through the vehicle information displays. See “VehicleInformation Display Menu Items” following for moreinformation on these displays.
UCustomization:Press this button to scroll through
each of the customization features. SeeDIC VehicleCustomization on page 4-80for more information on thecustomization features.
VSet/Reset:Press this button to reset certain DIC
features and to acknowledge DIC warning messagesand clear them from the DIC display.
yzMenu Up/Down:Press this button to scroll up
and down the menu items.
4-62

SERVICE BRAKE SYSTEM
This message displays if the ignition is on to inform thedriver that the brake fluid level is low. Have the brakesystem serviced by your dealer/retailer as soon aspossible.
SERVICE LANE DEPARTURE SYSTEM
If your vehicle has the Lane Departure Warning(LDW) system, this message may display to indicatethat the LDW system is not working properly. Ifthis message remains on after continued driving, thesystem needs service. See your dealer/retailer.SeeLane Departure Warning (LDW) on page 3-46formore information.
SERVICE PARKING ASSIST
If your vehicle has the Ultrasonic Front and RearParking Assist (UFRPA) system, this message displaysif there is a problem with the UFRPA system. Do notuse this system to help you park. SeeUltrasonic Frontand Rear Parking Assist (UFRPA) on page 3-40formore information. See your dealer/retailer for service.
SERVICE POWER STEERING
Your vehicle may have a speed variable assist steeringsystem. SeeSteering on page 5-8.
This message displays if a problem is detected with thespeed variable assist steering system. When thismessage is displayed, you may notice that the effortrequired to steer the vehicle decreases or feels lighter,but you will still be able to steer the vehicle.
SERVICE RADAR CRUISE
This message displays when the Adaptive CruiseControl (ACC) system and the Forward Collision Alert(FCA) system are disabled and need service. Seeyour dealer/retailer.
SERVICE SIDE BLIND ZONE ALERT
SYSTEM
If your vehicle has the Side Blind Zone Alert (SBZA)system and this message displays, both SBZA displayswill remain on indicating there is a problem with theSBZA system. If these displays remain on aftercontinued driving, the system needs service. See yourdealer/retailer. SeeSide Blind Zone Alert (SBZA)on page 3-43for more information.
4-75

SERVICE STABILITRAK
Your vehicle may have a vehicle stability enhancementsystem called StabiliTrak®. SeeStabiliTrak®Systemon page 5-5.
This message displays if there has been a problemdetected with the StabiliTrak system.
If this message comes on while you are driving, pull offthe road as soon as possible and stop carefully. Tryresetting the system by turning the ignition off then backon. If this message still stays on or comes back onagain while you are driving, your vehicle needs service.Have the StabiliTrak system inspected by yourdealer/retailer as soon as possible.
SERVICE SUSPENSION SYS (System)
This message displays when the magnetic ridecontrol or automatic leveling control system is notoperating properly. Have your vehicle serviced by yourdealer/retailer.
SERVICE THEFT DETERRENT SYSTEM
This message displays when there is a problem withthe theft-deterrent system programmed in the key.A fault has been detected in the system which meansthat the system is disabled and it is not protectingthe vehicle. The vehicle usually restarts; however, youmay want to take the vehicle to your dealer/retailer
before turning off the engine. SeePASS-Key®III+Electronic Immobilizer Operation on page 3-21for moreinformation.
SERVICE TIRE MONITOR SYSTEM
On vehicles with the Tire Pressure Monitor System(TPMS), this message displays if a part on the TPMS isnot working properly. The tire pressure light alsoflashes and then remains on during the same ignitioncycle. SeeTire Pressure Light on page 4-56. Severalconditions may cause this message to appear. SeeTirePressure Monitor Operation on page 6-58for moreinformation. If the warning comes on and stays on, theremay be a problem with the TPMS, see yourdealer/retailer.
SERVICE TRACTION CONTROL
This message displays when there is a problem with theTraction Control System (TCS). When this messageis displayed, the system will not limit wheel spin. Adjustyour driving accordingly. See your dealer/retailer forservice. SeeTraction Control System (TCS) on page 5-6for more information.
SERVICE TRANSMISSION
This message displays when there is a problem with thevehicle’s transmission. Have your vehicle serviced byyour dealer/retailer.
4-76

WASHER FLUID LOW ADD FLUID
This symbol appears withthis message.
This message displays when your vehicle is low onwindshield washer fluid. Refill the windshield washerfluid reservoir as soon as possible. SeeWindshieldWasher Fluid on page 6-31for more information.
DIC Vehicle Customization
Your vehicle has customization capabilities that allowyou to program certain features to one preferred setting.Customization features can only be programmed toone setting on the vehicle and cannot be programmedto a preferred setting for two different drivers.
All of the customization options may not be available onyour vehicle. Only the options available will bedisplayed on the DIC.
The default settings for the customization features wereset when your vehicle left the factory, but may havebeen changed from their default state since then.
The customization preferences are automaticallyrecalled.
To change customization preferences, use the followingprocedure.
Entering the Feature Settings Menu
1. Turn the ignition on and place the vehicle inP (Park).
To avoid excessive drain on the battery, it isrecommended that the headlamps are turned off.
2. Press the customization button to enter the featuresettings menu.
If the menu is not available, FEATURE SETTINGSAVAILABLE IN PARK will display. Before enteringthe menu, make sure the vehicle is in P (Park).
Feature Settings Menu Items
The following are customization features that allow youto program settings to the vehicle:
DISPLAY IN ENGLISH
This feature will only display if a language other thanEnglish has been set. This feature allows you to changethe language in which the DIC messages appear toEnglish.
4-80