2023 RAM 1500 ECU

IN CASE OF EMERGENCY331
Proper towing or lifting equipment is required to prevent
damage to your vehicle. Use only tow bars and other
equipment designed for this purpose, following equipment
per FCA US LLC instructions. Use of safety chains is
mandatory. Attach a tow bar or other towing device to
main structural members of the vehicle, not to fascia/
bumpers or associated brackets. State and local laws
regarding vehicles under tow must be observed.
If you must use the accessories (wipers, defrosters, etc.)
while being towed, the ignition must be in the ON/RUN
mode, not the ACC mode.
If the key fob is unavailable or the vehicle's battery is
discharged, find Instructions on shifting the transmission
out of PARK in order to move the vehicle
Úpage 328.
TWO-WHEEL DRIVE MODELS
FCA US LLC recommends towing your vehicle with all four
wheels OFF the ground using a flatbed.
If flatbed equipment is not available, and the transmission
is operable, the vehicle may be towed (with front wheels
on the ground) under the following conditions:
 The transmission must be in NEUTRAL (N). Instructions
on shifting the transmission to NEUTRAL (N) when the
engine is OFF
Úpage 328.
 The towing speed must not exceed 30 mph (48 km/h).
 The towing distance must not exceed 30 miles
(48 km).
If the transmission is not operable, or the vehicle must be
towed faster than 30 mph (48 km/h) and farther than 30 miles (48 km), tow with the rear wheels OFF the
ground. An acceptable method to tow the vehicle on a
flatbed are as follows:
 Using a suitable steering wheel stabilizer to hold the
front wheels in the straight position with the rear
wheels raised and the front wheels ON the ground.
FOUR-WHEEL DRIVE MODELS
FCA US LLC recommends towing with all wheels OFF the
ground.
CAUTION!
 Do not use sling type equipment when towing.
Vehicle damage may occur.
 When securing the vehicle to a flatbed truck, do not
attach to front or rear suspension components.
Damage to your vehicle may result from improper
towing.
CAUTION!
Towing this vehicle in violation of the approved
requirements can cause severe transmission damage.
Damage from improper towing is not covered under the
New Vehicle Limited Warranty.
CAUTION!
Front or rear wheel lifts must not be used (if the
remaining wheels are on the ground). Internal
damage to the transmission or transfer case will
occur if a front or rear wheel lift is used when towing.
 Towing this vehicle in violation of the approved
requirements can cause severe transmission and/or
transfer case damage. Damage from improper
towing is not covered under the New Vehicle
Limited Warranty.
7

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352SERVICING AND MAINTENANCE
(Continued)
Cooling System Notes
NOTE:When the vehicle is stopped after a few miles/kilometers
of operation, you may observe vapor coming from the front
of the engine compartment. This is normally a result of
moisture from rain, snow, or high humidity accumulating
on the radiator and being vaporized when the thermostat
opens, allowing hot engine coolant (antifreeze) to enter
the radiator.
If an examination of your engine compartment shows no
evidence of radiator or hose leaks, the vehicle may be
safely driven. The vapor will soon dissipate.
Do not overfill the coolant expansion bottle.
 Check the coolant freeze point in the radiator and in
the coolant expansion bottle. If engine coolant needs
to be added, the contents of the coolant expansion
bottle must also be protected against freezing.
 If frequent engine coolant additions are required, the
cooling system should be pressure tested for leaks.
 Maintain engine coolant concentration at a minimum
of 50% OAT coolant (conforming to MS.90032) and
distilled water for proper corrosion protection of your
engine which contains aluminum components.
 Make sure that the coolant expansion bottle overflow
hoses are not kinked or obstructed. 
Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean.
 Do not change the thermostat for Summer or Winter
operation. If replacement is ever necessary, install
ONLY the correct type thermostat. Other designs may
result in unsatisfactory engine cooling performance,
poor gas mileage, and increased emissions.
BRAKE SYSTEM
In order to ensure brake system performance, all brake
system components should be inspected periodically
Úpage 334.
Fluid Level Check — Brake Master Cylinder
The fluid level of the brake master cylinder should be
checked whenever the vehicle is serviced, or immediately
if the Brake System Warning Light is on. If necessary, add
fluid to bring level within the designated marks on the side
of the reservoir of the brake master cylinder. Be sure to
clean the top of the master cylinder area before removing
cap. With disc brakes, fluid level can be expected to fall as
the brake pads wear. Brake fluid level should be checked
when pads are replaced. If the brake fluid is abnormally
low, check the system for leaks
Úpage 397.
WARNING!
Riding the brakes can lead to brake failure and possibly
a collision. Driving with your foot resting or riding on the
brake pedal can result in abnormally high brake
temperatures, excessive lining wear, and possible brake
damage. You would not have your full braking capacity
in an emergency.
WARNING!
Use only manufacturer's recommended brake fluid Úpage 397. Using the wrong type of brake fluid can
severely damage your brake system and/or impair its
performance. The proper type of brake fluid for your
vehicle is also identified on the original factory
installed hydraulic master cylinder reservoir.
 To avoid contamination from foreign matter or
moisture, use only new brake fluid or fluid that has
been in a tightly closed container. Keep the master
cylinder reservoir cap secured at all times. Brake
fluid in an open container absorbs moisture from the
air resulting in a lower boiling point. This may cause
it to boil unexpectedly during hard or prolonged
braking, resulting in sudden brake failure. This could
result in a collision.

23_DT_OM_EN_USC_t.book Page 352

362SERVICING AND MAINTENANCE
F22 ––Spare
F23 ––Spare
F24 –15 Amp BlueMod RF Hub / Mod Ignition / Mod Cluster CNN
F25 40 Amp Green –Mod Integrated Trailer Brake
F26 –15 Amp BlueMod Cluster CCN / Mod Cyber Security / Trailer Gateway Module
(360 Camera)
F27 –5 Amp TanMod Cluster CCN / Mod SGW
F28 –10 Amp RedMod ORC
F29 –20 Amp Yellow Mod CRSM (Heat Rear LT)
F30 30 Amp Pink –Mod DTCM / Mod Tailgate
F31 30 Amp Pink –Mod CBC 1 Interior Light
F32 –20 Amp Yellow RT Spot Lamp *
F33 –10 Amp RedAssy Overhead Console / Switch 911 / Switch Assist / Sunshade /
HUD
F34 –15 Amp BlueFrt & RR Ventilated Seat Motor
F35 –10 Amp RedMod Inverter / Mtr Sunshade Sunroof / Mtr Dual Sunroof / USB Charge
Only
F36 40 Amp Green –Mod CBC 2 Exterior Light 1
F37 ––Spare
F38 ––Spare
F39 ––Spare
F40 20 Amp Blue –Dome Pursuit Vehicle *
Cavity Cartridge Fuse Micro Fuse Description
* If Equipped

23_DT_OM_EN_USC_t.book Page 362

403
INDEX
AAccessory Drive Belt Inspection .................................. 346
Adaptive Cruise Control (ACC)
(Cruise Control) ................................................... 143
, 145
Adding Engine Coolant (Antifreeze) ............................ 350
Adding Fuel................................................................... 171
Additives, Fuel .............................................................. 393
Adjust Down...........................................................................32
Forward ...................................................................... 32
Rearward ....................................................................32
Up................................................................................ 32
Adjustable Pedals ...........................................................38
Advance Phone Connectivity ....................................... 235
Air Bag Air Bag Operation.................................................... 290
Air Bag Warning Light .................................... 288
, 291
Enhanced Accident Response ...................... 297, 332
Event Data Recorder (EDR).................................... 332 Front Air Bag ........................................................... 291
If Deployment Occurs ............................................. 297
Knee Impact Bolsters ............................................. 294
Maintaining Your Air Bag System .......................... 298
Maintenance ........................................................... 298
Redundant Air Bag Warning Light ......................... 289
Transporting Pets.................................................... 311
Air Bag Light ...............................................108
, 288, 311
Air Cleaner, Engine (Engine Air Cleaner Filter) ........... 342
Air Conditioner Maintenance ...................................... 344
Air Conditioner Refrigerant .......................................... 344
Air Conditioner System ................................................ 344 Air Conditioning........................................................ 54
, 56
Air Conditioning Filter ............................................59, 344
Air Conditioning System ................................................. 59
Air Conditioning, Operating Tips .................................... 59
Air Filter ............................................................... 342
, 344
Air Pressure Tires.......................................................................... 377
Air Suspension .................................................... 134
, 137
Alarm Panic........................................................................... 17
Security Alarm...................................................23
, 110
Alterations/Modifications Vehicle........................................................................ 11
Antifreeze (Engine Coolant) ............................... 350
, 395
Disposal ...................................................................351
Anti-Lock Brake System (ABS) ..................................... 262
Anti-Lock Warning Light................................................ 110
Assist, Hill Start ............................................................. 266
Audio Settings ............................................................... 224
Audio Systems (Radio) ................................................. 191
Auto Down Power Windows............................................ 70
Automatic Door Locks .................................................... 27 Automatic Headlights ..................................................... 48Automatic High Beams ................................................... 47
Automatic Tailgate Release ........................................... 75
Automatic Temperature Control (ATC) .......................... 59
Automatic Transmission ..................................... 125
, 353
Adding Fluid ............................................................. 353
Fluid And Filter Change ...........................................353
Fluid Change ............................................................353 Fluid Level Check ....................................................353 Fluid Type .......................................................353
, 397
Special Additives ..................................................... 353
Automatic Transmission Limp Home Mode ............... 128
AutoPark ....................................................................... 119
AUX Camera .................................................................. 168
Auxiliary Driving Systems ............................................. 269
Axle Fluid.............................................................. 353
, 397
Axle Locker System ...................................................... 140
Axle Lubrication ............................................................ 353
BBack-Up Camera........................................................... 163
Battery..................................................................108, 340
Charging System Light ............................................ 108
Keyless Key Fob Replacement................................. 17
Battery Saver Feature .................................................... 50
Bed Divider ..................................................................... 84 Bed Extender .................................................................. 84
Bed Step ......................................................................... 78
Bedliner......................................................................... 389
Belts, Seat..................................................................... 311
Blind Spot Monitoring .................................................. 269
Bluetooth Connecting To A Particular Mobile Phone Or Audio Device After Pairing ................................. 231
Body Builders Guide..........................................................9
Body Mechanism Lubrication ...................................... 347
Bodywork ...................................................................... 388
B-Pillar Location ........................................................... 374
Brake Assist System..................................................... 263
Brake Control System .................................................. 263
11

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404
Brake Fluid .......................................................... 352, 397
Brake System ...................................................... 352, 392
Fluid Check.............................................................. 352
Master Cylinder ....................................................... 352
Parking .................................................................... 122
Warning Light .......................................................... 108
Brake/Transmission Interlock..................................... 125
Bulb Replacement ....................................................... 365
Bulbs, Light.......................................................... 313
, 365
CCamera ......................................................................... 163
Camera, AUX................................................................. 168
Camera, Rear ............................................................... 163
Camera, Surround View ............................................... 165
Camera, Trailer 360..................................................... 168
Capacities, Fuel............................................................ 395
Caps, Filler Oil (Engine) .............................................................. 337
Radiator (Coolant Pressure)................................... 350
Car Washes .................................................................. 388
Carbon Monoxide Warning .......................................... 313
Care And Maintenance ................................................ 388
Cargo Light ...................................................................... 49
CD.................................................................................. 226
Cellular Phone .............................................................. 252
Center High Mounted Stop Light................................. 369
Center Seat Storage Compartment ...............................60
Chart, Tire Sizing .......................................................... 371
Check Engine Light (Malfunction Indicator Light) ...... 117
Checking Your Vehicle For Safety ............................... 311
Checks, Safety.............................................................. 311
Child Restraint.............................................................. 298 Child Restraints
Booster Seats .......................................................... 301
Child Seat Installation ................................... 306
, 308
How To Stow An unused ALR Seat Belt .................305 Infant And Child Restraints ..................................... 300
Locating The LATCH Anchorages............................ 304
Lower Anchors And Tethers For Children............... 302
Older Children And Child Restraints....................... 300
Seating Positions ..................................................... 301
Clean Air Gasoline ........................................................ 393
Cleaning Wheels .....................................................................383
Climate Control ............................................................... 54 Automatic ................................................................... 54
Manual ....................................................................... 56
Compact Spare Tire ...................................................... 381
Connected Services ................ 236
, 237, 238, 239, 248
Contract, Service .......................................................... 400
Controls ......................................................................... 218
Cooling Pressure Cap (Radiator Cap) ..........................350
Cooling System ............................................................. 349 Adding Coolant (Antifreeze) ....................................350
Coolant Level ................................................. 349
, 351
Cooling Capacity ...................................................... 395
Disposal Of Used Coolant ....................................... 351 Drain, Flush, And Refill............................................349
Inspection ................................................................ 351
Points To Remember............................................... 352
Pressure Cap ...........................................................350
Radiator Cap ............................................................350Selection Of Coolant (Antifreeze) ........ 350
, 395, 396
Corrosion Protection ..................................................... 388
Cruise Control Accel/Decel.............................................................. 144 Cancel ...................................................................... 145
Resume.................................................................... 144
Cruise Control (Speed Control) ........................... 143
, 145
Cruise Light ..........................................................115, 116
Customer Assistance ................................................... 398
Cybersecurity ................................................................ 191
DDaytime Running Lights ................................................. 47 Dealer Service .............................................................. 341
Defroster, Windshield .................................... 54
, 56, 311
Deleting A Phone .......................................................... 231
Diagnostic System, Onboard ....................................... 116
Differential, Limited Slip .............................................. 140
Dimmer Control Switch .................................................. 51
Disable Vehicle Towing ................................................ 330
Disc Drive ...................................................................... 226
Disconnecting ............................................................... 231
Disposal Antifreeze (Engine Coolant) .................................... 351
Disturb........................................................................... 234
Door Ajar .............................................................. 108
, 110
Door Ajar Light ..................................................... 108, 110
Door Locks Automatic .................................................................. 27
Doors ............................................................................... 24
Driver Memory Presets ................................................ 224
Driver’s Seat Back Tilt .................................................... 30
Driving Through Flowing, Rising, Or Shallow Standing Water .................................................. 189
Driving Tips ................................................................... 189
Dual Rear Wheels......................................................... 392

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407
Lights ............................................................................ 3134WD ......................................................................... 114
Air Bag ...................................................108
, 288, 311
Air Suspension Fault............................................... 110
Brake Assist Warning ............................................. 265
Brake Warning ........................................................ 108 Bulb Replacement .................................................. 365Cargo ................................................................ 49
, 113
Center Mounted Stop ............................................. 369
Courtesy/Reading...................................................... 50
Cruise.............................................................. 115
, 116
Daytime Running ....................................................... 47
ECO Mode................................................................ 114 Electric Power Steering .......................................... 109Electronic Stability Program(ESP) Indicator .......... 109
Exterior ............................................................. 46
, 313
Fog .................................................................. 114, 368
Hazard Warning Flasher ......................................... 314
Headlights ...........................................................46
, 48
High Beam........................................................ 47, 116
High Beam/Low Beam Select ...................................47
Hill Descent Control Indicator ................................ 115
Hood Open .............................................................. 109
Illuminated Entry........................................................52
Interior ........................................................................50
LaneSense .............................................................. 115
Lights On Reminder ...................................................48
NEUTRAL ................................................................. 114 Oil Temperature ....................................................... 110
Park .......................................................................... 115
Passing....................................................................... 48
Rear Axle Lock ............................................... 112
, 114
Rear Tail Lamps....................................................... 368
Seat Belt Reminder ................................................. 110
Security Alarm.......................................................... 110
Service .....................................................................365
Service Forward Collision........................................ 112
Service LaneSense..................................................111
Service Stop Start....................................................112 Stop Start Active ...................................................... 115
Traction Control ....................................................... 265
Trailer Brake Disconnected ....................................110
Transmission Temperature..................................... 110
Turn Signals ............................................................. 366
Warning Instrument Cluster Descriptions.... 107
, 109
Limited-Slip Differential...................................... 140, 354
Load Shed Battery Saver Mode ...................................106
Load Shed Battery Saver On ........................................ 106
Load Shed Electrical Load Reduction ......................... 106
Load Shed Intelligent Battery Sensor..........................106
Loading Vehicle............................................................. 172 Tires.......................................................................... 374
Locks Automatic Door.......................................................... 27
Child Protection ......................................................... 27
Power Door ................................................................ 25
Low Tire Pressure System ............................................277
Lubrication, Body .......................................................... 347
Lug Nuts ........................................................................ 392
Lug Nuts/Bolts .............................................................. 392
MMaintenance................................................................... 73
Maintenance Free Battery ........................................... 340
Maintenance Schedule ................................................ 333
Malfunction Indicator Light (Check Engine) ............... 111
Manage My Account..................................................... 248
Manual Service ..................................................................... 401
Media Hub ...................................................................... 65 Media Mode .................................................................. 226
Memory Seat .................................................................. 29
Memory Settings ............................................................ 29
Methanol ....................................................................... 394
Midline Instrument Cluster — Gasoline

b
.................. 93
Mirrors ............................................................................. 38 Automatic Dimming .................................................. 38
Digital ......................................................................... 39
Electric Powered ....................................................... 41
Heated ....................................................................... 42
Manual Dimming....................................................... 38
Memory ...................................................................... 29
Outside....................................................................... 40
Power Folding ............................................................ 41
Rearview ........................................................... 38
, 314
Trailer Towing ............................................................ 42
Vanity ......................................................................... 39
Mobile App .................................................................... 238
Modifications/Alterations Vehicle ....................................................................... 11
Monitor, Tire Pressure System .................................... 277
Mopar Parts .................................................................. 400
MP3 Control .................................................................... 65
Multi-Function Control Lever ......................................... 47 Multifunction Tailgate .................................................... 75
11

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409
Rear Cross Path ........................................................... 271
Rear ParkSense System .............................................. 152
Rear Seat Reminder Alert............................................ 263
Rear Window, Sliding ...................................................... 71
Reclining Rear Seats ...................................................... 32
Recreational Towing .................................................... 186Four-Wheel Drive Models ....................................... 187
Shifting Into Transfer Case Neutral (N) ................. 187
Shifting Out Of Transfer Case Neutral (N) ............. 188Two-Wheel Drive Models ........................................ 186
Reformulated Gasoline................................................ 393
Refrigerant.................................................................... 344
Registering SiriusXM Guardian ................................... 238
Release, Hood .................................................................74 Release, Tailgate............................................................. 74
Reminder, Seat Belt..................................................... 283
Remote Features, Door Lock/Unlock ................ 242
, 249
Remote Features, Horn And Lights............................. 243
Remote Features, Starting ................................. 243
, 250
Remote Keyless Entry Panic Alarm ................................................................17
Programming Additional Key Fobs ...........................19
Remote Sound System (Radio) Control ...................... 218
Remote Start (Gasoline) .................................................21
Remote Starting Comfort Systems ....................................................... 22
Exit Remote Start Mode ............................................22
Remote Starting System.................................................21
Remove, Tailgate ............................................................76
Replacement Bulbs...................................................... 365
Replacement Tires ....................................................... 380
Reporting Safety Defects............................................. 401 Restraints, Child ...........................................................298
Restraints, Head ............................................................. 34
Roadside Assistance .......................................... 244
, 249
Rotation, Tires ............................................................... 386
SSafety.............................................................................217
Safety Checks Inside Vehicle ....................................... 311
Safety Checks Outside Vehicle ....................................312
Safety Defects, Reporting ............................................401
Safety Features............................................................. 217
Safety Information, Tire ................................................ 370
Safety Tips.....................................................................311
Safety, Exhaust Gas...................................................... 313
Satellite Radio............................................................... 220
Saved Radio Stations ...................................................224
Schedule, Maintenance ............................................... 333
Seat Belt Reminder ...................................................... 110
Seat Belts ............................................................ 282
, 311
Adjustable Shoulder Belt ........................................ 286
Adjustable Upper Shoulder Anchorage ..................286 Adjustable Upper Shoulder Belt Anchorage ..........286Automatic Locking Retractor (ALR) ........................ 287Child Restraints ....................................................... 298
Energy Management Feature ................................. 287
Extender ...................................................................286Front Seat ............................................. 282
, 283, 285
Inspection ................................................................ 311
Lap/Shoulder Belt Operation ................................. 285
Lap/Shoulder Belt Untwisting ................................ 285 Lap/Shoulder Belts ................................................. 283 Operating Instructions ............................................ 285
Pregnant Women .................................................... 287
Pretensioners .......................................................... 287
Rear Seat ................................................................. 283
Reminder ................................................................. 283
Seat Belt Extender .................................................. 286
Seat Belt Pretensioner............................................ 287
Seat Belt Reminder ................................................. 283
Untwisting Procedure.............................................. 285
Seat Belts Maintenance .............................................. 390
Seats ................................................................. 30
, 31, 32
Adjustment ......................................................... 30, 32
Easy Entry .................................................................. 33
Head Restraints ........................................................ 34
Memory ...................................................................... 29
Power ......................................................................... 32
Rear Folding .............................................................. 30
Reclining Rear ........................................................... 32
Tilting ......................................................................... 30
Second Row USB ............................................................ 65
Security System ..................................................... 23
, 110
Selec - Speed Control ................................................... 267
Selection Of Coolant (Antifreeze) ................................ 396
Send & Go ............................................................ 244
, 249
Sentry Key (Immobilizer) ................................................ 19 Service Assistance ....................................................... 398
Service Contract ........................................................... 400
Service Manuals ........................................................... 401
Settings, Audio.............................................................. 224
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