2021 CHRYSLER 300 ECU

2
INTRODUCTION
SYMBOLS KEY ...........................................................8
VEHICLE MODIFICATIONS/ALTERATIONS .. ...........8
SYMBOL GLOSSARY.. ...............................................8
GETTING TO KNOW YOUR VEHICLE
KEYS ....................................................................... 12
Key Fob .............................................................12
S
ENTRY KEY . . ......................................................... 14
IGNITION SWITCH .. ................................................ 15
Keyless Enter ‘n Go™ — Ignition.. ....................15
REMOTE START — IF EQUIPPED . . ........................ 16
How To Use Remote Start .. ..............................16
To Exit Remote Start Mode . . ...........................17
Remote Start Front Defrost Activation —
If Equipped. .
......................................................17
Remote Start Comfort Systems —
If Equipped. .
......................................................17
Remote Start Cancel Message . . ......................18
VEHICLE SECURITY SYSTEM — IF EQUIPPED . . ... 18
To Arm The System .. ........................................18
To Disarm The System . . ...................................19
Rearming Of The System . . ...............................19
Security System Manual Override . . .................19
Tamper Alert . . ...................................................19 DOORS .
...................................................................19
M
anual Door Locks .. ........................................19
Power Door Locks . . .........................................20
Keyless Enter ‘n Go™ — Passive Entry . . .........20
Automatic Unlock Doors On Exit. . ....................22
Automatic Door Locks — If Equipped . . ............22
Child-Protection Door Lock System —
Rear Doors . .
......................................................23
STEERING WHEEL . . ................................................23
Manual Tilt/Telescoping Steering Column —
If Equipped. .
......................................................23
Power Tilt/Telescoping Steering Column —
If Equipped. .
......................................................24
Heated Steering Wheel — If Equipped . . ..........24
UCONNECT VOICE RECOGNITION QUICK TIPS . . .25
Introducing Uconnect .. .....................................25
Basic Voice Commands . . .................................25
Get Started . . .....................................................25
Additional Information . . ...................................25
DRIVER MEMORY SETTINGS — IF EQUIPPED . . ...26
Programming The Memory Feature .. ..............26
Linking And Unlinking The Key Fob To
Memory . ............................................................27
M
emory Position Recall . . .................................27
SEATS . ....................................................................27
M anual Adjustment (Rear Seats) .. ..................27
Power Adjustment (Front Seats) . . ..................28
Heated Seats — If Equipped . . .........................30
Front Ventilated Seats — If Equipped . . ..........31
Head Restraints . . ............................................32 MIRRORS .
.............................................................. 34
I
nside Rearview Mirror.. ................................... 34
Illuminated Vanity Mirrors . . ............................. 34
Outside Mirrors.................................................3 5
D river's Outside Automatic Dimming
Mirror — If Equipped. .
....................................... 35
Outside Mirrors With Turn Signal And
Approach Lighting — If Equipped . .
.................. 35
Power Mirrors . . ................................................. 35
Power Folding Outside Mirrors —
If Equipped . .
.....................................................36
Heated Mirrors — If Equipped . . ....................... 36
Tilt Side Mirrors In Reverse — If Equipped . . ... 36
UNIVERSAL GARAGE DOOR OPENER
(HOMELINK®) . .
..................................................... 37
Before You Begin Programming
HomeLink® . .
.................................................... 37
Erasing All The HomeLink® Channels . . .......... 37
Identifying Whether You Have A Rolling
Code Or Non-Rolling Code Device . .
................. 37
Programming HomeLink® To A Garage
Door Opener . .
................................................... 38
Programming HomeLink® To A
Miscellaneous Device . .
.................................... 38
Reprogramming A Single HomeLink®
Button . .............................................................. 39
C
anadian/Gate Operator Programming . . ....... 39

3
EXTERIOR LIGHTS ................................................. 40
Headlight Switch.. .............................................40
Multifunction Lever . . ........................................40
Daytime Running Lights (DRLs). . .....................41
High/Low Beam Switch. . ..................................41
Automatic High Beam — If Equipped . . ...........41
Flash-To-Pass. . ..................................................41
Automatic Headlights . . ....................................41
Parking Lights . . ................................................41
Headlights On With Wipers . . ............................42
Adaptive Bi-Xenon High Intensity Discharge
Headlights — If Equipped . .
...............................42
Headlight Time Delay . . .....................................42
Lights-On Reminder . . .......................................42
Fog Lights — If Equipped . . ................................42
Turn Signals . . ....................................................43
Lane Change Assist — If Equipped . . ................43
INTERIOR LIGHTS . . ............................................... 43
Interior Courtesy Lights .. ..................................43
WINDSHIELD WIPERS AND WASHERS . . ............ 45
Windshield Wiper Operation .. ..........................45
Rain Sensing Wipers — If Equipped . . .............46
CLIMATE CONTROLS . . .......................................... 47
Automatic Climate Control Descriptions And
Functions . .........................................................47
A
utomatic Temperature Control (ATC) . . .........49
Climate Voice Commands. . ..............................50
Operating Tips . . ...............................................50 INTERIOR STORAGE AND EQUIPMENT .
.
............. 51
Storage..............................................................51
U SB/AUX Control . . ...........................................53
Lighted Cupholders — If Equipped . . ................53
Heated And Cooled Cupholders —
If Equipped . .
.....................................................53
Power Sunshade — If Equipped . . ....................54
Power Outlets . . .................................................54
WINDOWS . . ............................................................56
Power Window Controls .. .................................56
Automatic Window Features . . ........................56
Reset Auto-Up . . ................................................57
Window Lockout Switch . . .................................57
Wind Buffeting . . ...............................................57
PANORAMIC SUNROOF — IF EQUIPPED . . ...........58
Opening And Closing The Sunroof.. .................58
Pinch Protect Feature . . ....................................58
Venting Sunroof. . ..............................................59
Opening And Closing The Power Shade. . ........59
Sunroof Maintenance . . ....................................59
Ignition Off Operation. . .....................................59
HOOD . .....................................................................59
O pening The Hood.. ..........................................59
Closing The Hood . . ...........................................60
TRUNK . ...................................................................60
O pening The Trunk .. .........................................60
Closing The Trunk. . ...........................................60
Trunk Safety . . ...................................................61
Cargo Area Features . . .....................................61
LOAD LEVELING SYSTEM — IF EQUIPPED . . .......63
GETTING TO KNOW YOUR
INSTRUMENT PANEL
INSTRUMENT CLUSTER ........................................ 64
Instrument Cluster Descriptions .. .................. 66
INSTRUMENT CLUSTER DISPLAY . . ...................... 66
Location And Controls.. .................................... 66
Engine Oil Life Reset . . ..................................... 67
Instrument Cluster Display Selectable
Menu Items . .
.................................................... 68
Battery Saver On/Battery Saver Mode
Message — Electrical Load Reduction
Actions — If Equipped . .
.................................... 70
Programmable Features . . ................................ 71
WARNING LIGHTS AND MESSAGES . . ................. 71
Red Warning Lights .. ........................................72
Yellow Warning Lights . . .................................... 74
Yellow Indicator Lights . . ................................... 77
Green Indicator Lights . . ................................... 77
White Indicator Lights . . .................................... 78
Blue Indicator Lights . . ...................................... 78
ONBOARD DIAGNOSTIC SYSTEM — OBD II . . ...... 79
Onboard Diagnostic System
(OBD II) Cybersecurity . .
.................................... 79
EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS . .
.......................................................... 79

4
STARTING AND OPERATING
STARTING THE ENGINE ......................................... 81
Automatic Transmission .. ...............................81
Keyless Enter ‘n Go™ — Ignition. . ....................81
Normal Starting . . ..............................................81
AutoPark . ..........................................................82
C old Weather Operation (Below –22°F Or
−30°C) . ............................................................83
I
f Engine Fails To Start . . ...................................83
After Starting. . ...................................................84
ENGINE BLOCK HEATER — IF EQUIPPED . . ......... 84
ENGINE BREAK-IN RECOMMENDATIONS .. ......... 84
PARKING BRAKE .. ................................................. 84
AUTOMATIC TRANSMISSION.. .............................. 85
Ignition Park Interlock .. ....................................86
Brake Transmission Shift Interlock (BTSI)
System . .............................................................87
8
-Speed Automatic Transmission . . .................87
SPORT MODE — IF EQUIPPED . . ............................ 91
FUEL SAVER TECHNOLOGY 5.7L ONLY —
IF EQUIPPED ..
......................................................... 92
POWER STEERING .. ............................................... 92
CRUISE CONTROL SYSTEMS — IF EQUIPPED .. . 92
Cruise Control .. ................................................92
Adaptive Cruise Control (ACC) . . .......................94PARKSENSE FRONT AND REAR PARK

ASSIST — IF EQUIPPED. .
..................................... 103
ParkSense Sensors .. ..................................... 103
ParkSense Display . . ...................................... 103
ParkSense Warning Display . . ....................... 106
Enabling And Disabling ParkSense . . ............ 106
Service The ParkSense Park Assist
System . .......................................................... 106
C
leaning The ParkSense System . . ............... 107
ParkSense System Usage Precautions. . ...... 107
LANESENSE — IF EQUIPPED . . ........................... 108
LaneSense Operation .. ................................. 108
Turning LaneSense On Or Off . . ..................... 108
LaneSense Warning Message . . .................... 108
Changing LaneSense Status . . ...................... 110
PARKVIEW REAR BACK UP CAMERA. . ............. 110
REFUELING THE VEHICLE .. ................................. 111
Emergency Fuel Filler Door Release .. .......... 112
VEHICLE LOADING . . ............................................ 113
Vehicle Certification Label .. .......................... 113
Gross Vehicle Weight Rating (GVWR) . . ........ 113
Gross Axle Weight Rating (GAWR) . . ............. 113
Overloading. . .................................................. 113
Loading . ......................................................... 113 T RAILER TOWING .
.
.............................................. 114
Common Towing Definitions.. ....................... 114
Trailer Hitch Classification. . .......................... 115
Trailer Towing Weights (Maximum Trailer
Weight Ratings) . .
........................................... 116
Trailer And Tongue Weight . . ........................ 116
Towing Requirements . . ................................. 116
Towing Tips . . ................................................. 118
RECREATIONAL TOWING (BEHIND
MOTORHOME) . .
.................................................... 119
DRIVING TIPS .. ..................................................... 119
Driving On Slippery Surfaces .. ...................... 119
Driving Through Water . . ............................... 120
MULTIMEDIA
UCONNECT SYSTEMS ......................................... 121
CYBERSECURITY ................................................. 121
UCONNECT SETTINGS .. ...................................... 122
Customer Programmable Features —
Uconnect 4C/4C NAV Settings . .
.................. 122
RADIO OPERATION AND MOBILE PHONES. . .... 136
Regulatory And Safety Information .. ............ 136

9
Door Open Warning Light

Ú page 73
Electric Power Steering Fault Warning Light
Ú page 73
Electronic Throttle Control (ETC) Warning Light
Ú page 73
Engine Coolant Temperature Warning Light
Ú page 73
Oil Pressure Warning Light
Ú page 74
Oil Temperature Warning Light
Ú page 74
Seat Belt Reminder Warning Light
Ú page 73
Transmission Temperature Warning Light
Ú page 74
Red Warning Lights
Trunk Open Warning Light
Ú page 74
Vehicle Security Warning Light
Ú page 74
Yellow Warning Lights
Engine Check/Malfunction Indicator Warning Light (MIL)

Ú page 75
Electronic Stability Control (ESC) Active Warning Light
Ú page 75
Electronic Stability Control (ESC) OFF Warning Light
Ú page 75
Low Washer Fluid Warning Light
Ú page 75
Tire Pressure Monitoring System (TPMS) Warning Light
Ú page 76
Red Warning Lights
1

GETTING TO KNOW YOUR VEHICLE 13
NOTE:
If the vehicle is unlocked by Passive Entry and
no door is opened within 60 seconds, the
vehicle will relock and the security system will
arm (if equipped).
If one or more doors are open, or the trunk is
open, the doors will lock. The doors will unlock
automatically if the key fob is left inside the
passenger compartment, otherwise the doors
will stay locked.
All doors can be programmed to unlock on the first
p u

sh of the unlock button through Uconnect
Settings
Ú page 122.
NOTE:
When you use the key fob to open any door, the
c ou
rtesy lights, overhead lights, and approach
lighting in the outside mirrors (if equipped) will turn
on
Ú page 43.
To Unlatch The Trunk
Push the trunk button on the key fob two times
within five seconds to unlatch the trunk.
Replacing The Battery In The Key Fob
The recommended replacement battery is one
CR2032 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/hazardouswaste/
perchlorate for further information.
Do not touch the battery terminals that are on
the back housing or the printed circuit board.

1. Remove the emergency key (2) by sliding the e
mergency key release (1) on the back of the
key fob and pulling the emergency key out
with your other hand.

Emergency Key Removal
2. S
eparate the key fob halves using a #2 flat
b
lade screwdriver or a coin, and gently pry the
two halves of the key fob apart. Make sure not
to damage the seal during removal.

Separating Case With A Coin
Key Fob Battery Replacement

1 — Emergency Key Release Button
2 — Emergency Key
2

14 GETTING TO KNOW YOUR VEHICLE
3. Remove the back cover to access and replace
the battery. When replacing the battery, match
the (+) sign on the battery to the (+) sign on the
inside of the battery clip, located on the back
cover. Avoid touching the new battery with your
fingers. Skin oils may cause battery deterio -
ration. If you touch a battery, clean it with
r u

bbing alcohol.
4. To assemble the key fob case, snap the two h
alves together.
Programming And Requesting Additional
Key Fobs
Programming the key fob may be performed by an
authorized dealer.
NOTE:
Once a key fob is programmed to a vehicle, it
cannot be repurposed and reprogrammed to
another vehicle.
Only key fobs that are programmed to the
vehicle electronics can be used to start and
operate the vehicle. Once a key fob is
programmed to a vehicle, it cannot be
programmed to any other vehicle.
Duplication of key fobs may be performed at an
a u

thorized dealer. This procedure consists of
programming a blank key fob to the vehicle
electronics. A blank key fob is one that has never
been programmed.
NOTE:
When having the Sentry Key Immobilizer system
s e
rviced, bring all vehicle keys with you to an
authorized dealer.
SENTRY KEY
The Sentry Key Immobilizer system prevents
unauthorized vehicle operation by disabling the
engine. The system does not need to be armed or
activated. Operation is automatic, regardless of
whether the vehicle is locked or unlocked.
The system uses a key fob, keyless push button
i g

nition and a Radio Frequency (RF) receiver to
prevent unauthorized vehicle operation. Therefore,
only key fobs that are programmed to the vehicle
can be used to start and operate the vehicle. The
system cannot reprogram a key fob obtained from
another vehicle.
After placing the ignition switch in the ON/RUN
p os

ition, the Vehicle Security Light will turn on for
three seconds for a bulb check. If the light remains
on after the bulb check, it indicates that there is a
problem with the electronics. In addition, if the light
begins to flash after the bulb check, it indicates
that someone attempted to start the engine with
an invalid key fob. In the event that a valid key fob
is used to start the engine but there is an issue
with the vehicle electronics, the engine will start
and shut off after two seconds.
WARNING!
The integrated key fob contains a coin cell
battery. Do not ingest the battery; there is a
chemical burn hazard. If the coin cell battery is
swallowed, it can cause severe internal burns
in just two hours and can lead to death.
If you think a battery may have been swal-
lowed or placed inside any part of the body,
s e
ek immediate medical attention.
Keep new and used batteries away from chil -
dren. If the battery compartment does not
c l
ose securely, stop using the product and
keep it away from children.
WARNING!
Always remove the key fobs from the vehicle
and lock all doors when leaving the vehicle
unattended.
Always remember to place the Keyless Enter
‘n Go™ — Ignition in the OFF position.

GETTING TO KNOW YOUR VEHICLE 15
If the Vehicle Security Light turns on during normal
vehicle operation (vehicle running for longer than
10 seconds), it indicates that there is a fault in the
electronics. Should this occur, have the vehicle
serviced as soon as possible by an authorized
dealer.
All of the key fobs provided with your new vehicle
ha

ve been programmed to the vehicle electronics
Ú page 254.
IGNITION SWITCH
KEYLESS ENTER ‘N GO™ — IGNITION
This feature allows the driver to operate the
ignition switch with the push of a button as long as
the key fob is in the passenger compartment.
The START/STOP ignition button has several
ope

rating modes that are labeled and will
illuminate when in position. These modes are OFF,
ACC, ON/RUN, and START.
START/STOP Ignition Button

The push button ignition can be placed in the
f ol

lowing modes:
OFF
The engine is stopped.
Some electrical devices (e.g. central locking,
alarm, etc.) are still available.
ACC
Engine is not started.
Some electrical devices are available (e.g.
power windows). ON/RUN

Driving position.
All electrical devices are available (e.g. climate
controls, etc.).
START
The engine will start (when foot is on the brake
pedal).
NOTE:
If the ignition switch does not change the mode by
p u
shing the button, the key fob may have a low or
depleted battery. In this situation, a back up
method can be used to operate the ignition switch.
Put the nose side (side opposite of the emergency
key) of the key fob against the START/STOP
ignition button and push to operate the ignition
switch.

Depleted Key Fob Battery Procedure

CAUTION!
The Sentry Key Immobilizer system is not
compatible with some aftermarket Remote Start
systems. Use of these systems may result in
vehicle starting problems and loss of security
protection.
1 — OFF
2 — ACC
3 — ON/RUN
2

16 GETTING TO KNOW YOUR VEHICLE
(Continued)
NOTE:

When opening the driver's door with the ignition in
ON/RUN (engine not running), a chime will sound
to remind you to place the ignition in the OFF posi-
tion. In addition to the chime, the message will
d i

splay “Ignition Or Accessory On” in the cluster.

For more information on proper engine starting
procedures, see Ú page 81.
REMOTE START — IF EQUIPPED
This system uses the key fob to start the
engine conveniently from outside the
v
e
hicle while still maintaining security.
Remote Start is used to defrost windows in cold
we
ather, and to reach a comfortable climate in all
ambient conditions before the driver enters the
vehicle.
NOTE:
Obstructions between the vehicle and key fob may
r e
duce this range Ú page 254.
HOW TO USE REMOTE START
Push and release the Remote Start button on the
key fob twice within five seconds. The vehicle
doors will lock, the parking lights will flash, and the
horn will chirp twice (if programmed through the
Uconnect Settings). Then, the engine will start, and
the vehicle will remain in the Remote Start mode
for a 15
minute cycle. Pushing the Remote Start
bu

tton a third time shuts the engine off.
To drive the vehicle, push the unlock button, and
wi
th a valid Keyless Enter ‘n Go™ key fob in the
vehicle, press the brake pedal and place the
ignition in the ON/RUN position.
NOTE:
With Remote Start, the engine will only run for
15 minutes.
If an engine fault is present or fuel level is low,
the vehicle will start and then shut down in 10
seconds.
The parking lights will turn on and remain on
during Remote Start mode.
WARNING!
When exiting the vehicle, always remove the
key fob from the vehicle and lock your vehicle.
Never leave children alone in a vehicle, or with
access to an unlocked vehicle.
Allowing children to be in a vehicle unattended
is dangerous for a number of reasons. A child
or others could be seriously or fatally injured.
Children should be warned not to touch the
parking brake, brake pedal or the gear
selector.
Do not leave the key fob in or near the vehicle,
or in a location accessible to children, and do
not leave the ignition of a vehicle equipped
with Keyless Enter ‘n Go™ in the ON/RUN
position. A child could operate power
windows, other controls, or move the vehicle.
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat buildup
may cause serious injury or death.
CAUTION!
An unlocked vehicle is an invitation for thieves.
Always remove key fob from the vehicle and lock
all doors when leaving the vehicle unattended.
WARNING!

Do not start or run an engine in a closed garage
or confined area. Exhaust gas contains Carbon
Monoxide (CO) which is odorless and colorless.
Carbon Monoxide is poisonous and can cause
serious injury or death when inhaled.

Keep key fobs away from children. Operation
of the Remote Start system, windows, door
locks or other controls could cause serious
injury or death.
WARNING!