2021 RAM 1500 air suspension

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AUTOMATIC TRANSMISSION .......................... 154 Ignition Park Interlock ...............................155
Brake/Transmission Shift Interlock
System .......................................................155 Eight-Speed Automatic Transmission.......156
FOUR-WHEEL DRIVE OPERATION —
IF EQUIPPED ...................................................... 161
Four-Position Electronically Shifted
Transfer Case — If Equipped ....................161 Five-Position Electronically Shifted
Transfer Case — If Equipped ....................163
ACTIVE-LEVEL FOUR CORNER AIR
SUSPENSION SYSTEM — IF EQUIPPED ........... 165 Description .................................................165
Air Suspension Modes...............................167
Instrument Cluster Display Messages......168Operation....................................................168
ACTIVE-LEVEL FOUR CORNER AIR
SUSPENSION SYSTEM (REBEL MODELS
ONLY) — IF EQUIPPED ....................................... 169 Description .................................................169
Air Suspension Modes...............................171
Instrument Cluster Display Messages......171Operation....................................................172
AXLE LOCK SYSTEM — IF EQUIPPED .............. 173
LIMITED-SLIP DIFFERENTIAL —
IF EQUIPPED ....................................................... 174
POWER STEERING ............................................. 174 Electric Power Steering ............................174 FUEL SAVER TECHNOLOGY 5.7L ENGINES
ONLY — IF EQUIPPED......................................... 175
STOP/START SYSTEM — IF EQUIPPED ............ 175 Autostop Mode........................................... 175
Possible Reasons The Engine Does Not
Autostop ..................................................... 175 To Start The Engine While In Autostop
Mode........................................................... 176 To Manually Turn Off The Stop Start
System ........................................................ 176 To Manually Turn On The Stop Start
System ........................................................ 177 System Malfunction................................... 177
CRUISE CONTROL SYSTEMS —
IF EQUIPPED ...................................................... 177
Cruise Control — If Equipped..................... 177Adaptive Cruise Control (ACC) —
If Equipped ................................................. 179
PARKSENSE FRONT/REAR PARK ASSIST
SYSTEM — IF EQUIPPED ....................................189
ParkSense Sensors ................................... 190
ParkSense Warning Display ...................... 190
ParkSense Display ..................................... 190
Enabling And Disabling Front And/Or
Rear ParkSense ......................................... 193 Service The ParkSense Park Assist
System ........................................................ 193 Cleaning The ParkSense System.............. 194
ParkSense System Usage Precautions .... 194 PARKSENSE ACTIVE PARK ASSIST
SYSTEM — IF EQUIPPED ................................... 195
Enabling And Disabling The ParkSense
Active Park Assist System ......................... 196 Parallel/Perpendicular Parking Space
Assistance Operation ................................ 197
LANESENSE — IF EQUIPPED ........................... 199
LaneSense Operation................................ 199
Turning LaneSense On Or Off ................... 200
LaneSense Warning Message .................. 200Changing LaneSense Status..................... 202
PARKVIEW REAR BACK UP CAMERA ............. 202
AUX Camera — If Equipped ...................... 204
SURROUND VIEW CAMERA SYSTEM — IF
EQUIPPED ........................................................... 204
AUX Camera — If Equipped ...................... 208
REFUELING THE VEHICLE — GASOLINE
ENGINE ................................................................ 208
REFUELING THE VEHICLE — DIESEL
ENGINE ............................................................... 210
Avoid Using Contaminated Fuel ............... 210Bulk Fuel Storage — Diesel Fuel ............... 210Diesel Exhaust Fluid .................................. 211
Diesel Exhaust Fluid Storage .................... 211Adding Diesel Exhaust Fluid ..................... 211

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13
Transmission Temperature Warning Light — If Equipped
Ú page 129
Door Open Warning Light Úpage 129
Yellow Warning Lights
Adaptive Cruise Control (ACC) Fault Warning
Light — If Equipped
Úpage 129
Air Suspension Fault Warning Light — If Equipped
Ú page 129
Engine Check/Malfunction Indicator Warning Light (MIL)
Ú page 130
Electronic Park Brake Warning Light Úpage 130
Electronic Stability Control (ESC) Active Warning Light — If Equipped
Úpage 130
Red Warning Lights
Electronic Stability Control (ESC) OFF Warning
Light — If Equipped
Úpage 131
Service LaneSense Warning Light — If Equipped Úpage 131
Low Washer Fluid Warning Light — If Equipped Úpage 131
Low Fuel Warning Light Úpage 131
Tire Pressure Monitoring System (TPMS) Warning Light
Ú page 131
Anti-Lock Brake System (ABS) Warning Light Úpage 132
Rear Axle Locker Fault Indicator Light — If Equipped
Ú page 132
Service Forward Collision Warning (FCW) Light — If Equipped
Ú page 132
Yellow Warning Lights
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14
Service Stop/Start System Warning Light Úpage 133
Service 4WD Warning Light — If Equipped Úpage 133
Cruise Control Fault Warning Light Úpage 133
Yellow Indicator Lights
Forward Collision Warning Off Indicator Light —
If Equipped
Ú page 133
Air Suspension Payload Protection Indicator Light — If Equipped
Úpage 133
Trailer Merge Assist Indicator Light — If Equipped
Ú page 133
TOW/HAUL Indicator Light Úpage 133
Yellow Warning Lights
Cargo Light On Indicator Light
Úpage 133
Air Suspension Off-Road 1 Indicator Light — If Equipped
Ú page 133
Air Suspension Off-Road 2 Indicator Light — If Equipped
Ú page 133
Air Suspension Normal Height Indicator Light — If Equipped
Ú page 134
Air Suspension Aerodynamic Height Indicator Light — If Equipped
Úpage 134
Entry/Exit Indicator Light — If Equipped Úpage 134
Air Suspension Ride Height Raising Indicator Light — If Equipped
Úpage 134
Yellow Indicator Lights

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15
Air Suspension Ride Height Lowering Indicator Light — If Equipped
Úpage 134
Rear Axle Lock Indicator Light Úpage 134
4WD Indicator Light — If Equipped Úpage 134
4WD Low Indicator Light — If Equipped Úpage 134
4WD High Indicator Light — If Equipped Úpage 134
NEUTRAL Indicator Light — If Equipped Úpage 134
Low Diesel Exhaust Fluid (DEF) Indicator Light — If Equipped
Ú page 134
Wait To Start Light — If Equipped Úpage 135
Yellow Indicator Lights
Water In Fuel Indicator Light — If Equipped
Úpage 135
Green Indicator Lights
Adaptive Cruise Control (ACC) Set With Target
Light — If Equipped
Úpage 135
Adaptive Cruise Control (ACC) Set With No
Target Detected Indicator Light — If Equipped
Úpage 135
ECO Mode Indicator Light Úpage 135
Park/Headlight On Indicator Light Úpage 135
LaneSense Indicator Light — If Equipped Úpage 137
Front Fog Indicator Light — If Equipped Úpage 136
Yellow Indicator Lights
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17
GETTING TO KNOW YOUR VEHICLE
KEYS
KEY FOB
Your vehicle is equipped with a key fob which
supports Passive Entry, Remote Keyless Entry
(RKE), Keyless Enter-N-Go (if equipped), and
Remote Start (if equipped). The key fob allows
you to lock or unlock all doors, tailgate, and the
RamBox (if equipped) as well as activate the
Panic Alarm from distances up to approximately
66 ft (20 m). The key fob does not need to be
pointed at the vehicle to activate the system. The
key fob also contains an emergency key, which is
stored in the rear of the key fob.
NOTE:
The key fob’s wireless signal may be blocked if
the key fob is located next to a mobile phone,
laptop, or other electronic device. This may
result in poor performance.
If your vehicle is equipped with a Wireless
Charging Pad, the key fob may not be found if
it is placed within 15 cm (150 mm) of the pad
Ú page 77.
With the ignition in the ON position and the
vehicle moving at 2 mph (4 km/h), all RKE
commands are disabled.
Key Fob
In case the ignition switch does not change with
the push of a button, the key fob may have a low
or fully depleted battery. A low key fob battery
can be verified by referring to the instrument
cluster, which will display directions to follow.
NOTE:
A low key fob battery condition may be indicated
by a message in the instrument cluster display,
or by the LED light on the key fob. If the LED key
fob light no longer illuminates from key fob
button pushes, then the key fob battery requires
replacement.
1 — Unlock
2 — LED Light
3 — Lock
4 — Tailgate Lowering
5 — Remote Start
6 — PANIC
7 — Emergency Key
8 — Air Suspension
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18GETTING TO KNOW YOUR VEHICLE
To Lock/Unlock The Doors And Tailgate
Push and release the unlock button on the key
fob once to unlock the driver’s door, or, twice
within five seconds to unlock all doors, the
tailgate and the RamBox (if equipped). To lock all
the doors and the tailgate, push the lock button
once.
When the doors are unlocked, the turn signals
will flash and the illuminated entry system will
be activated. When the doors are locked, the
turn signals will flash and the horn will chirp.
All doors can be programmed to unlock on the
first push of the unlock button. The horn chirp
when the lock button is pushed can be
programmed on/off within Uconnect Settings
Úpage 237.
Air Suspension (Remote Lowering Of The
Vehicle) — If Equipped
For easy entry and loading, your
vehicle can be lowered by pushing the
key fob air suspension lowering button
two times. When air suspension
lowering is requested using the key fob, the
vehicle will send a series of chirps and flashes to
alert the customer that the operation has begun
and will continue these alerts until it successfully
lowers. The following conditions must be met for the
vehicle to lower remotely:
The vehicle must not already be in Entry/Exit
(Park) ride height.
The vehicle battery must be fully charged.
All doors must be closed.
The key fob must be out of the vehicle.
NOTE:
Ensure the vehicle is clear of all objects, pets,
and people prior to remote lowering.
Canceling Remote Lowering
Vehicle lowering can be cancelled at anytime.
When vehicle lowering is cancelled, the vehicle
will raise up to the next defined level and lock
out the remote lowering feature until the
ignition has been cycled ON/OFF.
To cancel vehicle lowering, push the key fob air
suspension lowering button one time during the
lowering process. When vehicle lowering is
cancelled, the horn will chirp two times and the
turn signal lamps will flash four times. Once
raising is completed, the horn will chirp one
time. NOTE:
More information on air suspension is provided
later in this manual Ú
page 165.
Replacing The Battery In The Key Fob
The replacement battery model is one CR2450
battery.
NOTE:
Customers are recommended to use a
battery obtained from Mopar. Aftermarket
coin battery dimensions may not meet the
original OEM coin battery dimensions.
Perchlorate Material — special handling may
apply. See www.dtsc.ca.gov/hazard -
ouswaste/perchlorate for further informa -
tion.
Do not touch the battery terminals that are
on the back housing or the printed circuit
board.
Do not replace the coin battery if the LED on
the key fob above the top row buttons blinks
when a button is pressed. The coin battery
should last a minimum of three years with
normal vehicle usage.

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116GETTING TO KNOW YOUR INSTRUMENT PANEL
DISPLAY MENU ITEMS
Push and release the up or down arrow
button until the desired selectable menu icon is
highlighted in the instrument cluster display.
Speedometer
Push and release the up or down arrow
button until the speedometer menu item is
highlighted in the instrument cluster display.
Push and release the OK button to cycle the
display between mph and km/h.
Vehicle Info
Push and release the up or down arrow
button until the Vehicle Info menu icon is
displayed in the instrument cluster display.
Push and release the left or right arrow
button to scroll through the information
submenus and push and release the OK button
to select or reset the resettable submenus.
Tire Pressure Monitor System
Air Suspension — If Equipped
Coolant Temperature — If Equipped
Trans Temperature (Automatic only)
Oil Temperature
Oil Pressure — If Equipped
Oil Life
Battery Voltage — If Equipped
Gauge Summary — If Equipped
Coolant Temp
Trans Temp
Oil Temp
Oil Pressure
Engine Hours
Off-Road
Push and release the up or down arrow
button until the Off-Road menu icon is displayed
in the instrument cluster display. Push and
release the left or right arrow button to
scroll through the information submenus.
Drivetrain
Front Wheel Angle: displays the graphical
and numerical value of calculated
average front wheel angle from the
steering wheel orientation.
Transfer Case Lock Status: displays
“Lock” graphic only during 4WD High,
4WD High Part Time, 4WD Low status.
Axle Lock And Sway Bar Status (If
Equipped): displays front and rear or rear
only axle locker graphic, and sway bar
connection graphic with text message
(connected or disconnected).
Pitch And Roll
Displays the pitch and roll of the vehicle
in the graphic with the angle number on
the screen.
NOTE:
When vehicle speed becomes too high to
display the pitch and roll, “- -” will display in
place of the numbers, and the graphic will be
greyed out. A message indicating the necessary
speed for the feature to become available will
also display.
Driver Assist — If Equipped
The Driver Assist menu displays the status of
the ACC and LaneSense systems.
Push and release the up or down arrow
button until the Driver Assist menu is displayed
in the instrument cluster display.

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GETTING TO KNOW YOUR INSTRUMENT PANEL129
Electric Power Steering (EPS) Fault
Warning Light
This warning light will turn on when
there's a fault with the EPS system
Úpage 174.
Tailgate Open Warning Light
This warning light will illuminate when
the tailgate is open.
NOTE:
If the vehicle is moving, there will also be a
single chime.
Trailer Brake Disconnected Warning Light
This warning light will illuminate when
the Trailer Brake has been
disconnected.
Transmission Temperature Warning Light
— If Equipped
This warning light will illuminate to
warn of a high transmission fluid
temperature. This may occur with
strenuous usage such as trailer
towing. If this light turns on, stop the vehicle and
run the engine at idle or slightly faster, with the
transmission in PARK or NEUTRAL, until the
light turns off. Once the light turns off, you may
continue to drive normally.
Door Open Warning Light
This indicator will illuminate when a
door is ajar/open and not fully closed.
NOTE:
If the vehicle is moving there will also be a single
chime.
YELLOW WARNING LIGHTS
Adaptive Cruise Control (ACC) Fault
Warning Light — If Equipped
This warning light will illuminate to
indicate a fault in the ACC system.
Contact an authorized dealer for
service Ú page 179.
Air Suspension Fault Warning Light — If
Equipped
This light will illuminate when a fault is
detected with the air suspension
system.
WARNING!
Continued operation with reduced assist
could pose a safety risk to yourself and
others. Service should be obtained as soon
as possible.
WARNING!
If you continue operating the vehicle when
the Transmission Temperature Warning Light
is illuminated you could cause the fluid to boil
over, come in contact with hot engine or
exhaust components and cause a fire.
CAUTION!
Continuous driving with the Transmission
Temperature Warning Light illuminated will
eventually cause severe transmission
damage or transmission failure.
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