engine CADILLAC DTS 2010 1.G Service Manual

This light comes on during a malfunction in one oftwo ways:
Light Flashing:A misfire condition has been detected.A misfire increases vehicle emissions and coulddamage the emission control system on the vehicle.Diagnosis and service might be required.
To prevent more serious damage to the vehicle:
•Reduce vehicle speed.
•Avoid hard accelerations.
•Avoid steep uphill grades.
•If towing a trailer, reduce the amount of cargo being
hauled as soon as it is possible.
If the light continues to flash, when it is safe to do so, stopthe vehicle. Find a safe place to park the vehicle. Turn thekey off, wait at least 10 seconds, and restart the engine. Ifthe light is still flashing, follow the previous steps and seeyour dealer/retailer for service as soon as possible.
Light On Steady:An emission control systemmalfunction has been detected on the vehicle. Diagnosisand service might be required.
An emission system malfunction might be corrected bydoing the following:
•Make sure the fuel cap is fully installed. SeeFilling
the Tank on page 6-8. The diagnostic system candetermine if the fuel cap has been left off or
improperly installed. A loose or missing fuel capallows fuel to evaporate into the atmosphere. A fewdriving trips with the cap properly installed shouldturn the light off.
•If the vehicle has been driven through a deep
puddle of water, the vehicle’s electrical systemmight be wet. The condition is usually correctedwhen the electrical system dries out. A few drivingtrips should turn the light off.
•Make sure to fuel the vehicle with quality fuel.
Poor fuel quality causes the engine not to runas efficiently as designed and can cause: stallingafter start-up, stalling when the vehicle is changedinto gear, misfiring, hesitation on acceleration,or stumbling on acceleration. These conditionsmight go away once the engine is warmed up.
If one or more of these conditions occurs, changethe fuel brand used. It will require at least onefull tank of the proper fuel to turn the light off.
SeeGasoline Octane on page 6-5.
If none of the above have made the light turn off, yourdealer/retailer can check the vehicle. The dealer/retailerhas the proper test equipment and diagnostic tools tofix any mechanical or electrical problems that mighthave developed.
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Emissions Inspection and Maintenance
Programs
Some state/provincial and local governments have ormight begin programs to inspect the emission controlequipment on the vehicle. Failure to pass this inspectioncould prevent getting a vehicle registration.
Here are some things to know to help the vehicle passan inspection:
•The vehicle will not pass this inspection if the check
engine light is on with the engine running, or if thekey is in ON/RUN and the light is not on.
•The vehicle will not pass this inspection if the
OBD II (on-board diagnostic) system determinesthat critical emission control systems have not beencompletely diagnosed by the system. The vehiclewould be considered not ready for inspection.This can happen if the battery has recently beenreplaced or if the battery has run down. Thediagnostic system is designed to evaluate criticalemission control systems during normal driving.This can take several days of routine driving. If thishas been done and the vehicle still does notpass the inspection for lack of OBD II systemreadiness, your dealer/retailer can preparethe vehicle for inspection.
Oil Pressure Light
{WARNING:
Do not keep driving if the oil pressure is low. The
engine can become so hot that it catches fire.
Someone could be burned. Check the oil as soon
as possible and have the vehicle serviced.
Notice:Lack of proper engine oil maintenance candamage the engine. The repairs would not becovered by the vehicle warranty. Always follow themaintenance schedule in this manual for changingengine oil.
This light comes on briefly while starting the engine.If it does not, have the vehicle serviced by yourdealer/retailer. If the system is working normally theindicator light then goes off.
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If the light comes on and stays on, it means that oil isnot flowing through the engine properly. The vehiclecould be low on oil and it might have some othersystem problem.
Security Light
For information regardingthis light and the vehicle’ssecurity system, seeContent Theft-Deterrent onpage 3-19.
Fog Lamp Light
The fog lamp light comeson when the fog lamps arein use.
The light goes out when the fog lamps are turned off.SeeFog Lamps on page 4-30for more information.
Lights On Reminder
This light comes onwhenever the parkinglamps are on.
SeeExterior Lamps on page 4-25for more information.
Cruise Control Light
This light comes onwhenever the cruisecontrol is set.
The light goes out when the cruise control is turned off.SeeCruise Control on page 4-12andAdaptiveCruise Control on page 4-15for more information.
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Highbeam On Light
This light comes on whenthe high-beam headlampsare in use.
SeeHeadlamp High/Low-Beam Changer on page 4-6for more information.
Fuel Gage
The fuel gage showsapproximately how muchfuel is in the tank. Itworks only when theengine is on.
An arrow on the fuel gage indicates the side of thevehicle the fuel door is on.
If the fuel supply gets low, the FUEL LEVEL LOWmessage appears in the Driver Information Center anda single chime sounds. SeeDIC Warnings andMessages on page 4-67for more information.
Here are a few situations that may occur with the fuelgage. All of these situations are normal and do notindicate that anything is wrong with the fuel gage:
•At the gas station the gas pump shuts off before the
gage reads full.
•The gage may change when the vehicle is turning,
stops quickly or accelerates quickly.
•It takes a little more or less fuel to fill the tank than
the gage indicated. For example, the gage mayhave indicated that the tank was half full, butit actually took a little more or less than half thetank’s capacity to fill the tank.
Driver Information Center (DIC)
The Driver Information Center (DIC) gives you thestatus of many of your vehicle’s systems. The DIC isalso used to display warning/status messages. Allmessages will appear in the DIC display located at thebottom of the instrument panel cluster, below thetachometer and speedometer. The DIC buttons arelocated on the instrument panel, to the left of thesteering wheel.
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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.
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Vehicle Information Display Menu
Items
T(Vehicle Information):The following display menu
items can be displayed by pressing the vehicleinformation button:
OIL LIFE REMAINING
If the vehicle has this display, it shows the estimated oillife remaining. If you see 99% OIL LIFE REMAININGon the display, that means that 99% of the current oil liferemains.
When the oil life is depleted, the CHANGE ENGINE OILSOON message will appear on the display. Youshould change the oil as soon as possible. In additionto the engine oil life system monitoring the oil life,additional maintenance is recommended in theMaintenance Schedule in this manual. SeeScheduledMaintenance on page 7-3andEngine Oil on page 6-13.
Remember, you must reset the OIL LIFE yourself aftereach oil change. It will not reset itself. Also, be careful notto reset the OIL LIFE accidentally at any time other thanwhen the oil has just been changed. It cannot be resetaccurately until the next oil change. To reset the engineoil life system, SeeEngine Oil Life System on page 6-16.The display will show 100% when the system is reset.
UNITS
This display allows you to select between English orMetric units of measurement. Once in this display, pressthe set/reset button to select between ENGLISH orMETRIC units.
PARKING ASSIST
If your vehicle has the Ultrasonic Front and RearParking Assist (UFRPA) system, this display allows thesystem to be turned on or off. Once in this display,press the set/reset button to select between ON or OFF.If you choose ON, the system will be turned on. If youchoose OFF, the system will be turned off. TheUFRPA system automatically turns back on after eachvehicle start. When the UFRPA system is turned off andthe vehicle is shifted out of P (Park), the DIC willdisplay the PARKING ASSIST OFF message as areminder that the system has been turned off. SeeDICWarnings and Messages on page 4-67andUltrasonicFront and Rear Parking Assist (UFRPA) on page 3-40for more information.
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AUTOMATIC LIGHT CONTROL ON
This message displays when the automatic headlampsare turned on. SeeExterior Lamps on page 4-25formore information.
BATTERY SAVER ACTIVE
This message displays when the system detects thatthe battery voltage is dropping beyond a reasonablelevel. The battery saver system starts reducing certainfeatures of the vehicle that you may be able to notice.At the point that the features are disabled, this messageis displayed. It means that the vehicle is trying tosave the charge in the battery.
Turn off all unnecessary accessories to allow the batteryto recharge.
The normal battery voltage range is 11.5 to 15.5 volts.You can monitor battery voltage on the DriverInformation Center (DIC) by pressing the trip/fuel buttonuntil BATTERY VOLTAGE is displayed.
CHANGE ENGINE OIL SOON
This message displays when service is required for yourvehicle. See your dealer/retailer. SeeEngine Oil onpage 6-13andScheduled Maintenance on page 7-3formore information.
When you reset the CHANGE ENGINE OIL SOONmessage by clearing it from the display, you still mustreset the engine oil life system separately. For moreinformation on resetting the engine oil life system, seeEngine Oil Life System on page 6-16.
CHECK TIRE PRESSURE or ADD AIR
TO TIRE
On vehicles with the Tire Pressure Monitor System(TPMS), this message displays when the pressure inone or more of the vehicle’s tires is low. This messagealso displays LEFT FRONT, RIGHT FRONT, LEFTREAR, or RIGHT REAR to indicate which tire needs tobe checked. The low tire pressure warning light willalso come on. SeeTire Pressure Light on page 4-56.If a tire pressure message appears on the DIC, stop assoon as you can. Have the tire pressures checkedand set to those shown on the Tire Loading Informationlabel. SeeTires on page 6-46,Loading the Vehicleon page 5-18, andInflation - Tire Pressure onpage 6-54. You can receive more than one tire pressuremessage at a time. To read the other messages thatmay have been sent at the same time, press theset/reset button. The DIC also shows the tire pressurevalues. SeeDIC Operation and Displays on page 4-62.
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CLEAN RADAR
This message displays when the Adaptive CruiseControl (ACC) system and the Forward Collision Alert(FCA) system are disabled because the radar is blockedand cannot detect vehicles in your path. It may alsoactivate during heavy rain or due to road spray. To cleanthe system, see “Cleaning the System” underAdaptiveCruise Control on page 4-15.
CRUISE SET TO XXX MPH (km/h)
This message displays whenever the cruise control isset. SeeCruise Control on page 4-12andAdaptiveCruise Control on page 4-15for more information.
If your vehicle has Adaptive Cruise Control (ACC), aftera few seconds, this message clears and the message“SET SPD XX” displays at the bottom of the DIC.See “SET SPD (Speed)” later in this section.
DRIVER DOOR OPEN
This symbol appears withthis message.
This message displays when the driver door is notclosed completely. Make sure that the door is closedcompletely.
ENGINE HOT – A/C
(Air Conditioning) OFF
This message displays when the engine coolantbecomes hotter than the normal operating temperature.SeeEngine Coolant Temperature Gage on page 4-56.To avoid added strain on a hot engine, the airconditioning compressor automatically turns off. Whenthe coolant temperature returns to normal, the airconditioning compressor turns back on. You cancontinue to drive your vehicle.
If this message continues to appear, have the systemrepaired by your dealer/retailer as soon as possibleto avoid damage to the engine.
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ENGINE OVERHEATED IDLE ENGINE
Notice:If you drive your vehicle while the engine isoverheating, severe engine damage may occur. Ifan overheat warning appears on the instrumentpanel cluster and/or DIC, stop the vehicle as soonas possible. Do not increase the engine speed abovenormal idling speed. SeeEngine Overheating onpage 6-27for more information.
This message displays when the engine coolanttemperature is too hot. Stop and allow the vehicle toidle until it cools down. SeeEngine CoolantTemperature Warning Light on page 4-55.
SeeOverheated Engine Protection Operating Mode onpage 6-29for information on driving to a safe placein an emergency.
ENGINE OVERHEATED STOP ENGINE
Notice:If you drive your vehicle while the engineis overheating, severe engine damage may occur.If an overheat warning appears on the instrumentpanel cluster and/or DIC, stop the vehicle as soon aspossible. SeeEngine Overheating on page 6-27for more information.
This message displays when the engine has overheated.Immediately look for a safe place to pull your vehicleover and turn the engine off right away to avoid severeengine damage. SeeEngine Overheating on page 6-27andOverheated Engine Protection Operating Modeon page 6-29. A chime also sounds when this messageis displayed.
ENGINE POWER REDUCED
This message displays when the engine power is beingreduced to protect the engine from damage. Therecould be several malfunctions that might causethis message. Reduced engine power can affect thevehicle’s ability to accelerate. If this message is on, butthere is no reduction in performance, proceed toyour destination. The performance may be reduced thenext time the vehicle is driven. The vehicle may bedriven at a reduced speed while this message is on, butacceleration and speed may be reduced. Anytime thismessage stays on, the vehicle should be taken toyour dealer/retailer for service as soon as possible.
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LANE DEPARTURE SYSTEM
UNAVAILABLE
If your vehicle has the Lane Departure Warning (LDW)system, this message may display if the LDW systemdoes not activate due to a temporary condition.SeeLane Departure Warning (LDW) on page 3-46formore information.
LEFT REAR DOOR OPEN
This symbol appears withthis message.
This message displays when the driver side rear door isnot closed completely. Make sure that the door isclosed completely.
NO CRUISE BRAKING GAS PEDAL
APPLIED
This message displays when the Adaptive CruiseControl (ACC) is engaged and you are pressing theaccelerator pedal enough to disable ACC automaticbraking. SeeAdaptive Cruise Control on page 4-15formore information.
OIL PRESSURE LOW STOP ENGINE
Notice:If you drive your vehicle while the engineoil pressure is low, severe engine damage mayoccur. If a low oil pressure warning appears on theinstrument panel cluster and/or DIC, stop thevehicle as soon as possible. Do not drive the vehicleuntil the cause of the low oil pressure is corrected.SeeEngine Oil on page 6-13for more information.
This message displays when the vehicle’s engineoil pressure is low. The oil pressure light also appearson the instrument panel cluster. SeeOil PressureLight on page 4-59.
A multiple chime sounds when this message is displayed.SeeEngine Oil on page 6-13for more information.
Stop the vehicle immediately, as engine damage canresult from driving a vehicle with low oil pressure. Havethe vehicle serviced by your dealer/retailer as soonas possible when this message is displayed.
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