air conditioning Ram 3500 2020 User Guide

SERVICING AND MAINTENANCE447
represent higher levels of performance
on the laboratory test wheel, than the
minimum required by law.
STORING THE VEHICLE
If you are storing your vehicle for more than
21 days, we recommend that you take the
following steps to minimize the drain on your
vehicle's battery:
Disconnect the negative cable from battery.
Any time you store your vehicle or keep it out
of service (i.e., vacation) for two weeks or
more, run the air conditioning system at idle
for about five minutes in the fresh air and
high blower setting. This will ensure
adequate system lubrication to minimize the
possibility of compressor damage when the
system is started again.
BODYWORK
PROTECTION FROM ATMOSPHERIC
A
GENTS
Vehicle body care requirements vary according
to geographic locations and usage. Chemicals
that make roads passable in snow and ice and
those that are sprayed on trees and road
surfaces during other seasons are highly
corrosive to the metal in your vehicle. Outside
parking, which exposes your vehicle to airborne
contaminants, road surfaces on which the
vehicle is operated, extreme hot or cold weather
and other extreme conditions will have an
adverse effect on paint, metal trim, and
underbody protection.
The following maintenance recommendations
will enable you to obtain maximum benefit from
the corrosion resistance built into your vehicle.
What Causes Corrosion?
Corrosion is the result of deterioration or
removal of paint and protective coatings from
your vehicle. The most common causes are:
Road salt, dirt and moisture accumulation.
Stone and gravel impact.
Insects, tree sap and tar.
Salt in the air near seacoast localities.
Atmospheric fallout/industrial pollutants.
BODY AND UNDERBODY MAINTENANCE
Cleaning Headlights
Your vehicle is equipped with plastic headlights
and fog lights that are lighter and less
susceptible to stone breakage than glass
headlights.
Plastic is not as scratch resistant as glass and
therefore different lens cleaning procedures
must be followed.
To minimize the possibility of scratching the
lenses and reducing light output, avoid wiping
with a dry cloth. To remove road dirt, wash with
a mild soap solution followed by rinsing.
Do not use abrasive cleaning components,
solvents, steel wool or other aggressive
material to clean the lenses.
WARNING!
The temperature grade for this tire is
established for a tire that is properly inflated
and not overloaded. Excessive speed,
under-inflation, or excessive loading, either
separately or in combination, can cause heat
buildup and possible tire failure.
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552
INDEX
A
Adaptive Cruise Control (ACC)
(Cruise Control)
.............................................. 282Adding Engine Coolant (Antifreeze)............... 418Adding Fuel.......................................... 319, 320Additives, Fuel............................................... 454AdjustDown........................................................... 35Forward....................................................... 35Rearward..................................................... 35Up................................................................ 35Adjustable Pedals............................................ 42Air BagAir Bag Operation...................................... 185Air Bag Warning Light................................ 182Enhanced Accident Response......... 189, 384Event Data Recorder (EDR)....................... 384If Deployment Occurs................................ 188Knee Impact Bolsters................................ 185Maintaining Your Air Bag System.............. 190Maintenance............................................. 190Redundant Air Bag Warning Light.............183Transporting Pets...................................... 209Air Bag Light............................... 130, 182, 210Air Cleaner, Engine (Engine Air
Cleaner Filter)...................................... 403, 425
Air Conditioner Maintenance........................ 405Air Conditioner Refrigerant.................. 405, 406Air Conditioner System................................. 405Air Conditioning......................................... 57, 67Air Conditioning Filter..............................69, 406Air Conditioning System................................... 67Air Conditioning, Operating Tips....................... 68Air Filter........................................................ 403Air PressureTires......................................................... 436AlarmPanic........................................................... 15Security Alarm....................................25, 132Alterations/ModificationsVehicle......................................................... 12Android Auto................................................. 545Antifreeze (Engine Coolant)................. 418, 459Capacites................................................. 460Disposal................................................... 420Anti-Lock Brake System (ABS)...................... 144Anti-Lock Warning Light................................ 137Apple CarPlay................................................ 546Assist, Hill Start............................................. 151Audio Systems (Radio).................................. 467Auto Down Power Windows............................. 70Automatic Door Locks...................................... 30
Automatic Headlights.......................................50Automatic Tailgate Release.............................74Automatic Temperature Control (ATC)..............67Automatic Transmission....................... 235, 424Adding Fluid.............................................. 424Fluid And Filter Change............................. 424Fluid Change............................................. 424Fluid Level Check............................. 422, 423Fluid Type............................... 422, 463, 466Shifting..................................................... 239Special Additives...................................... 422Automatic Transmission Limp Home Mode... 238AUX Camera......................................... 311, 318Auxiliary Driving Systems.............................. 153Axle Fluid.....................................424, 463, 466Axle Lubrication............................................ 424
B
Back-Up......................................................... 309Back-Up Camera........................................... 309Bar, Stabilizer/Sway System......................... 260Battery................................................. 132, 400Blanket..................................................... 225Charging System Light.............................. 132Keyless Key Fob Replacement....................15Battery Saver Feature......................................53

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554 Diesel Fuel System, Re-Priming
..................... 412Differential, Limited Slip................................ 270Disabled Vehicle Towing................................ 381Disposal Antifreeze (Engine Coolant)....................... 420Do Not Disturb............................................... 545Door Ajar........................................................ 133Door Ajar Light............................................... 133Door LocksAutomatic.................................................... 30Doors............................................................... 26Draining Fuel/Water Separator Filter............ 409Driver’s Seat Back Tilt..................................... 33DrivingOff-Pavement............................................ 261Off-Road.................................................... 261Through Flowing, Rising, Or Shallow Standing Water..................................... 343Dual Rear Wheels................................ 445, 452
E
Electric Brake Control System....................... 145Anti-Lock Brake System............................. 144Electronic Roll Mitigation................. 149, 153Electrical Power Outlets................................... 86Electronic Range Select (ERS)............. 238, 243Electronic Stability Control (ESC)...................146Electronic Throttle Control Warning Light...... 132Electronically Shifted Transfer Case.... 246, 250Emergency Braking........................................ 231
Emergency, In Case OfFreeing Vehicle When Stuck..................... 380Hazard Warning Flasher........................... 346Jump Starting........................................... 375Emission Control System Maintenance........ 143Engine......................................... 396, 397, 398Air Cleaner................................................ 403Block Heater.................................... 220, 229Break-In Recommendations..................... 230Compartment.................................. 397, 398Compartment Identification...................... 396Coolant (Antifreeze)......................... 461, 464Exhaust Gas Caution....................... 209, 456Fails To Start............................................ 216Flooded, Starting...................................... 216Fuel Requirements.......................... 454, 459Identifcation.................................... 397, 398Idling........................................................ 226Jump Starting........................................... 375Oil..................................401, 459, 461, 464Oil Filler Cap.................................... 396, 402Oil Filter.................................................... 403Oil Reset................................................... 115Oil Selection.................................... 401, 459Oil Synthetic............................................. 403Overheating.............................................. 379Runaway................................................... 319Starting..................................................... 214Engine Oil Viscosity....................................... 402
Enhanced Accident Response Feature...189, 384

Entry System, Illuminated................................54Ethanol.......................................................... 454Exhaust Brake............................................... 232Exhaust Gas Cautions.......................... 209, 456Exhaust System..........................209, 416, 425Exterior Lighting...............................................48Exterior Lights........................................ 48, 212
F
FiltersAir Cleaner
................................................ 403Air Conditioning................................. 69, 406Engine Fuel............................................... 409Engine Oil............................... 403, 461, 464Engine Oil Disposal................................... 403FlashersTurn Signals.............................. 51, 141, 212Flash-To-Pass...................................................50Flat Tire Stowage.......................................... 372Fluid Capacities................................... 459, 460Fluid Leaks.................................................... 212Fluid Level ChecksBrake........................................................ 421Fluid, Brake................................................... 463Fluids And Lubricants........................... 461, 464Fog Lights.............................................. 51, 355Fold Flat Load Floor.........................................84Fold-Flat Seats.................................................33Forward Collision Warning............................ 160Four Wheel Drive........................................... 246

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