warning light FORD SUPER DUTY 2015 3.G Repair Manual

Customer action requiredPossible causeLow tire pressurewarning light
Make sure tires are at the proper pres-sure. See Inflating your tires in thischapter. After inflating your tires to themanufacturer’s recommended pressureas shown on the Tire Label (located onthe edge of driver’s door or the B-Pillar),the vehicle must be driven for at leasttwo minutes over 20 mph (32 km/h)before the light turns off.
Tire(s) under-inflatedSolid warning light
Repair the damaged road wheel and tireassembly and reinstall it on the vehicleto restore system function. For adescription on how the system functions,see When your temporary spare tireis installed in this section.
Spare tire in use
If the tires are properly inflated and thespare tire is not in use but the lightremains on, contact your authorizeddealer as soon as possible.
Tire pressure monitoringsystem malfunction
On vehicles with different front and reartire pressures, the system must beretrained following every tire rotation.See Tire Care (page 265).
Tire rotation withoutsensor training
Repair the damaged road wheel and tireassembly and reinstall it on the vehicleto restore system function. For adescription on how the system functions,see When your temporary spare tireis installed in this section.
Spare tire in useFlashing warninglight
If the tires are properly inflated and thespare tire is not in use but the lightremains on, contact your authorizeddealer as soon as possible.
Tire pressure monitoringsystem malfunction
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When Inflating Your Tires
When putting air into your tires (such as ata gas station or in your garage), the tirepressure monitoring system may notrespond immediately to the air added toyour tires.
It may take up to two minutes of drivingover 20 mph (32 km/h) for the light to turnoff after you have filled your tires to therecommended inflation pressure
How Temperature Affects Your TirePressure
The tire pressure monitoring systemmonitors tire pressure in each pneumatictire. While driving in a normal manner, atypical passenger tire inflation pressuremay increase about 2 to 4 psi (14 to 28kPa) from a cold start situation. If thevehicle is stationary overnight with theoutside temperature significantly lowerthan the daytime temperature, the tirepressure may decrease about 3 psi (21kPa) for a drop of 30°F (17°C) in ambienttemperature. This lower pressure valuemay be detected by the tire pressuremonitoring system as being significantlylower than the recommended inflationpressure and activate the system warninglight for low tire pressure.
If the low tire pressure warning light is on,visually check each tire to verify that no tireis flat. If one or more tires are flat, repair asnecessary. Check the air pressure in theroad tires. If any tire is under-inflated,carefully drive the vehicle to the nearestlocation where air can be added to thetires. Inflate all the tires to therecommended inflation pressure.
Tire Pressure Monitoring System ResetProcedure
WARNING
To determine the requiredpressure(s) for your vehicle, see theSafety Compliance CertificationLabel (affixed to either the door hingepillar, door-latch post, or the door edgethat meets the door-latch post, next to thedriver's seating position), or Tire Labellocated on the B-Pillar or the edge of thedriver's door.
Note:You need to perform the tire pressuremonitoring system reset procedure aftereach tire rotation on vehicles that requiredifferent recommended tire pressures in thefront tires as compared to the rear tires.
Overview
To provide the vehicle's load carryingcapability, some vehicles require differentrecommended tire pressures in the fronttires as compared to the rear tires. The tirepressure monitoring system equipped onthese vehicles is designed to illuminate thelow tire pressure warning light at twodifferent pressures; one for the front tiresand one for the rear tires.
Since tires need to be rotated to provideconsistent performance and maximum tirelife, the tire pressure monitoring systemneeds to know when the tires are rotatedto determine which set of tires are on thefront and which are on the rear. With thisinformation, the system can detect andproperly warn of low tire pressures.
System reset tips:
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11.Set all four tires to the recommendedair pressure as indicated on theSafety Compliance CertificationLabel (affixed to either the door hingepillar, door-latch post, or the dooredge that meets the door-latch post,next to the driver's seating position)or Tire Label located on the B-Pillaror the edge of the driver's door.
CHANGING A ROAD WHEEL
WARNINGS
The use of tire sealants may damageyour tire pressure monitoring systemand should not be used. However, ifyou must use a sealant, the tire pressuremonitoring system sensor and valve stemon the wheel must be replaced by anauthorized dealer.
If the tire pressure monitor sensorbecomes damaged, it will no longerfunction. See Tire PressureMonitoring System (page 282).
Note:If your vehicle is equipped with thetire pressure monitoring system, theindicator light will illuminate when the sparetire is in use. To restore the full function ofthe monitoring system, all road wheelsequipped with tire pressure monitoringsensors must be mounted on the vehicle.
If you get a flat tire while driving, do notapply the brake heavily. Instead, graduallydecrease your speed. Hold the steeringwheel firmly and slowly move to a safeplace on the side of the road.
If your vehicle is equipped with the tirepressure monitoring system, have a flatserviced by an authorized dealer in orderto prevent damage to the system sensors.See Tire Pressure Monitoring System(page 282). Replace the spare tire with aroad tire as soon as possible. Duringrepairing or replacing of the flat tire, havethe authorized dealer inspect the systemsensor for damage.
Dissimilar Spare Wheel and TireAssembly Information
WARNING
Failure to follow these guidelinescould result in an increased risk ofloss of vehicle control, injury or death.
If you have a dissimilar spare wheel andtire, then it is intended for temporary useonly. This means that if you need to use it,you should replace it as soon as possiblewith a road wheel and tire assembly thatis the same size and type as the road tiresand wheels that were originally providedby Ford. If the dissimilar spare tire or wheelis damaged, it should be replaced ratherthan repaired.
A dissimilar spare wheel and tire assemblyis defined as a spare wheel and tireassembly that is different in brand, size orappearance from the road tires and wheelsand can be one of three types:
1.T-type mini-spare: This spare tirebegins with the letter T for tire size andmay have Temporary Use Only molded inthe sidewall.
2.Full-size dissimilar spare with labelon wheel: This spare tire has a label onthe wheel that states: THIS WHEEL ANDTIRE ASSEMBLY FOR TEMPORARY USEONLY
When driving with one of the dissimilarspare tires listed above, do not:
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1.Attach the spare tire lock key (A) to thejack handle (B).
2.Fully insert the jack handle (with oneextension) through the bumper holeand into the guide tube. The key andlock will engage with a slight push andcounterclockwise turn. You will feelsome resistance when you turn the jackhandle assembly.
3.Turn the handle counterclockwise andlower the spare tire until you can slidethe tire rearward and the cable is slack.
4.Remove the retainer through the centerof the wheel. If your vehicle is equippedwith a tether, perform the followingsteps.
5.Lift the spare tire on end to access thetether attachment.
6.Use the lug wrench to remove the lugnut from the spare tire tether.
7.If not replacing the spare or flat tire tothe underbody storage area, raise thewheel retainer up into the installedposition.
8.Use the attached fastener strap (onthe spare tire tether) to attach thetether end to the winch retainer priorto raising to the installed position.
Tire Change Procedure
WARNINGS
When one of the front wheels is offthe ground, the transmission alonewill not prevent the vehicle frommoving or slipping off the jack, even if thetransmission is in park (P).
To help prevent the vehicle frommoving when you change a tire, besure to place the transmission in park(P), set the parking brake and block (inboth directions) the wheel that isdiagonally opposite (other side and end ofthe vehicle) to the tire being changed.
Never get underneath a vehicle thatis supported only by a jack. If thevehicle slips off the jack, you orsomeone else could be seriously injured.
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VentilationSee: Climate Control.........................................103VINSee: Vehicle Identification Number............303Voice Control....................................................61
W
Warning Lamps and Indicators..................774X2............................................................................804X4 HIGH................................................................804X4 LOW................................................................80Anti-Lock Braking System.................................77Battery.......................................................................77Brake System..........................................................77Check Fuel Cap.....................................................78Cruise Control........................................................78Diesel Warning Lights........................................80Direction Indicator................................................78Door Ajar..................................................................78Electronic Locking Differential........................78Engine Coolant Temperature...........................78Engine Oil................................................................78Fasten Safety Belt................................................78Front Airbag............................................................78High Beam...............................................................78Hill Descent............................................................78Low Fuel Level.......................................................79Low Tire Pressure Warning...............................79Powertrain Malfunction/ReducedPower/Electronic Throttle Control............79Service Engine Soon............................................79Stability Control....................................................79Stability Control Off............................................79Transmission Tow/Haul....................................80Washer Fluid Check....................................244WashersSee: Cleaning the Exterior..............................256See: Wipers and Washers.................................64Waxing..............................................................257Wheel NutsSee: Changing a Road Wheel.......................288Wheels and Tires.........................................263General Information.........................................263Technical Specifications.................................299Windows and Mirrors...................................69Windshield Washers.....................................64
Windshield Wipers........................................64Speed dependent wipers.................................64Wipers and Washers.....................................64
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