ECU CHRYSLER PACIFICA 2021 Repair Manual

SERVICING AND MAINTENANCE345
(Continued)
Brake Master Cylinder
The fluid in the master cylinder should be checked
when performing under hood services or
immediately if the “Brake Warning Light” is
illuminated.
Be sure to clean the top of the master cylinder area
before removing the cap. If necessary, add fluid to
bring the fluid level up to the requirements
described on the brake fluid reservoir. 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. However, low
fluid level may be caused by a leak and a checkup
may be needed.
Use only manufacturer recommended brake fluid
Ú page 383.
AUTOMATIC TRANSMISSION
Special Additives
The manufacturer strongly recommends against
using any special additives in the transmission.
Automatic Transmission Fluid (ATF) is an
engineered product and its performance may be
impaired by supplemental additives. Therefore, do
not add any fluid additives to the transmission.
Avoid using transmission sealers as they may
adversely affect seals.
WARNING!
Use only manufacturer recommended brake
fluid Ú page 383. 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 a 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.
Overfilling the brake fluid reservoir can result
in spilling brake fluid on hot engine parts,
causing the brake fluid to catch fire. Brake
fluid can also damage painted and vinyl
surfaces, care should be taken to avoid its
contact with these surfaces.
Do not allow petroleum-based fluid to contam -
inate the brake fluid. Brake seal components
could be damaged, causing partial or
complete brake failure. This could result in a
collision.
WARNING!
CAUTION!
Do not use chemical flushes in your
transmission as the chemicals can damage your
transmission components. Such damage is not
covered by the New Vehicle Limited Warranty.
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SERVICING AND MAINTENANCE347
The fuses protect electrical systems against
excessive current.
When a device does not work, you must check
the fuse element inside the blade fuse for a
break/melt.
Also, please be aware that when using power
outlets for extended periods of time with the
engine off may result in vehicle battery discharge.

Blade Fuses

Underhood Fuses
The Power Distribution Center (PDC) is located in
the engine compartment near the battery. This
center contains cartridge fuses, mini-fuses,
micro-fuses, circuit breakers and relays. A label
that identifies each component is printed on the
inside of the cover.
Before any procedure is done on the PDC, make
sure engine is turned off.
Remove the cover by unlatching the two locks
located at each side of the PDC cover, avoid the
usage of screw drivers or any other tool to remove
the cover, since they may apply excessive force
and result in a broken/damaged part. After service is done, secure the cover with its two
locks.NOTE:The function and amperage of these fuses are
different, depending on vehicle trim level and
content.

Power Distribution Center

1 — Fuse Element
2 — Blade Fuse with a good/functional fuse
element
3 — Blade fuse with a bad/not functional fuse
element (blown fuse)
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350SERVICING AND MAINTENANCE
F43 –20 Amp Yellow Fuel Pump Motor
F44 30 Amp Pink –CBC / Interior Lights
F45 30 Amp Pink –Power Inverter *
F46 30 Amp Pink –Driver Door Module
F47 30 Amp Pink –Passenger Door Module
F48 ––Not Used
F49 25 Amp Clear –RR Sliding Door Module-LT *
F50 25 Amp Clear –RR Door Module-RT *
F51 30 Amp Pink –Front Wiper
F52 30 Amp Pink –Brake Vacuum Pump
F53 ––Not Used
F54 40 Amp Green –ESP-ECU And Valves
F55 –15 Amp BlueRadio Frequency HUB / Keyless
Ignition System (KIN) / ESL / DVD
F56 –10 Amp RedFront and Rear HVAC Control Module
/ Occupant Classification Module
(OCM)/Electronic Steering Lock (ESL) / ESP / ESC
F57 ––Not Used
F58 –10 Amp RedDrive Train Control Mod / Power
Transfer Unit *
Cavity Cartridge Fuse Blade FuseDescription
* If Equipped

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SERVICING AND MAINTENANCE353
30 Amp mini fuse is substituted for 25 Amp Circuit Breaker. F92
–5 Amp Tan Security Gateway
F93 ––Not Used
F94 40 Amp Green –ESC Motor Pump
F95A –10 Amp RedUSB Charge Port — ACC RUN
F95B –10 Amp RedSelectable Fuse Location – USB IP
(Direct) B+
F96 –10 Amp Red Airbag
F97 –10 Amp Red Airbag
F98 –15 Amp Blue Left HID Headlamp *
F99 30 Amp Pink –Trailer Tow Elect Brake Module *
F100 –10 Amp RedHeadlamp Level / RR Camera /
Blindspot / Humidity SNSR / In Car Temp SNSR / Headlamp SW *
Circuit Breakers
CB1 25 AmpPower Seats (Driver)
CB2 25 Amp *Power Seats (Pass)
CB3 25 AmpFRT PWR Window W/O Door Nodes +
RR PWR Window Lockout
Cavity Cartridge Fuse Blade FuseDescription
* If Equipped
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388
INDEX
A
About Your Brakes......................................... 377Adaptive Cruise Control (ACC)
(Cruise Control).................................... 147, 149Adding Engine Coolant (Antifreeze)............... 343Additives, Fuel............................................... 380AdjustDown........................................................... 47Forward....................................................... 47Rearward..................................................... 47Up................................................................ 47Air Bag........................................................... 262Air Bag Operation...................................... 264Air Bag Warning Light...................... 261, 264Driver Knee Air Bag................................... 269Enhanced Accident Response......... 272, 326Event Data Recorder (EDR)....................... 326Front Air Bag............................................. 264If Deployment Occurs................................ 272Knee Impact Bolsters................................ 269Maintaining Your Air Bag System.............. 274Maintenance............................................. 274Redundant Air Bag Warning Light.............262Side Air Bags............................................. 269Transporting Pets...................................... 292Air Bag Light............................... 123, 261, 292
Air Cleaner, Engine
(Engine Air Cleaner Filter)............................. 334Air Conditioner Maintenance........................ 335Air Conditioner Refrigerant.................. 335, 336Air Conditioner System................................. 335Air Conditioning Filter..............................82, 336Air Conditioning, Operating Tips....................... 82Air Filter........................................................ 334Air PressureTires......................................................... 363AlarmArm The System.......................................... 22Disarm The System..................................... 22Security Alarm.......................................... 126All Wheel DriveTowing...................................................... 326All Wheel Drive (AWD)................................... 144Alterations/ModificationsVehicle......................................................... 10Antifreeze (Engine Coolant)................. 342, 381Disposal................................................... 344Anti-Lock Brake System (ABS)...................... 234Anti-Lock Warning Light................................ 126Ashtray............................................................. 92Assist, Hill Start............................................. 238Audio Jack........................................................ 87
Audio Systems (Radio).................................. 188Auto Up Power Windows..................................94Automatic Dimming Mirror...............................57Automatic Headlights.......................................65Automatic Temperature Control (ATC)..............81Automatic Transaxle..................................... 139Automatic Transmission................................ 141Adding Fluid..................................... 346, 383Fluid And Filter Change............................. 346Fluid Change............................................. 346Fluid Level Check............................. 345, 346Fluid Type........................................ 346, 383Special Additives...................................... 345AutoPark....................................................... 133AUX Cord..........................................................87Auxiliary Electrical Outlet (Power Outlet)..........89AWDTowing...................................................... 326Axle Lubrication............................................ 383
B
Back-Up Camera........................................... 171Battery................................................. 123, 332Charging System Light.............................. 123Jump Starting........................................... 318Keyless Key Fob Replacement....................15

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390 Corrosion Protection
...................................... 374Cruise Control................................................ 147Cruise Control (Speed Control)...................... 149Cruise Light......................................... 129, 130Customer Assistance..................................... 384Cybersecurity................................................. 188
D
Daytime Brightness, Interior Lights.................. 67Daytime Running Lights................................... 63Dealer Service............................................... 333Defroster, Windshield.................................... 292Delay (Intermittent) Wipers.............................. 68Diagnostic System, Onboard......................... 130Dimmer Switch Headlight..................................................... 63DipsticksOil (Engine)................................................ 332Disable Vehicle Towing.................................. 324DisposalAntifreeze (Engine Coolant)....................... 344Door Ajar.............................................. 124, 125Door Ajar Light..................................... 124, 125Driver’s Seat Back Tilt.............................. 32, 33DrivingThrough Flowing, Rising, Or ShallowStanding Water
..................................... 187DVD Player (Video Entertainment System).... 214
E
Electric Brake Control System....................... 235Anti-Lock Brake System............................ 234Traction Control System........................... 239Electric Parking Brake................................... 137Electric Remote Mirrors................................... 58Electronic Stability Control (ESC).................. 236Electronic Throttle Control Warning Light...... 124Emergency Braking....................................... 246Emergency, In Case OfHazard Warning Flasher........................... 295Jacking............................................ 298, 301Jump Starting........................................... 318Overheating.............................................. 321Towing...................................................... 324Emission Control System Maintenance........ 131Engine........................................................... 331Air Cleaner................................................ 334Block Heater............................................. 136Break-In Recommendations..................... 136Checking Oil Level.................................... 332Compartment........................................... 331Compartment Identification...................... 331Coolant (Antifreeze).................................. 382Cooling..................................................... 342Exhaust Gas Caution................................ 294Fails To Start............................................ 135Flooded, Starting...................................... 135
Fuel Requirements................................... 378Oil...........................................333, 381, 382Oil Filler Cap............................................. 331Oil Filter.................................................... 334Oil Selection..................................... 333, 381Oil Synthetic.............................................. 334Overheating.............................................. 321Starting..................................................... 132Enhanced Accident Response
Feature................................................ 272, 326Ethanol.......................................................... 379Exhaust Gas Cautions................................... 294Exhaust System................................... 294, 341Exterior Lighting..................................... 63, 355Exterior Lights...................... 63, 293, 354, 355
F
FiltersAir Cleaner
................................................ 334Air Conditioning................................. 82, 336Engine Oil........................................ 334, 382Engine Oil Disposal................................... 334FlashersHazard Warning........................................ 295Turn Signals..................... 63, 129, 293, 355Flash-To-Pass............................................ 63, 65Flat Tire Changing.......................298, 355, 367Flat Tire Stowage........................ 306, 355, 367

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393
Parade Mode (Daytime Brightness)
............. 67Park........................................................... 129Passing................................................. 63, 65Reading....................................................... 66Seat Belt Reminder................................... 125Security Alarm........................................... 126Service...................................................... 354Service Automatic Emergency Braking...... 127Service AWD.............................................. 127Service LaneSense.................................... 127Service Stop Start System......................... 127Side Marker............................................... 355SmartBeams............................................... 64Stop Start Active........................................ 129Tire Pressure Monitoring (TPMS)............... 128Traction Control......................................... 238Turn Signals.................... 63, 129, 293, 355Load Floor, Cargo.......................................... 101Load Shed Battery Saver Mode..................... 121Load Shed Battery Saver On.......................... 121Load Shed Electrical Load Reduction............ 121Load Shed Intelligent Battery Sensor............ 121Loading Vehicle................................... 101, 176Tires.......................................................... 360Low Tire Pressure System............................. 247Lubrication, Body........................................... 337Lug Nuts........................................................ 377Luggage Carrier............................................. 106
M
Maintenance.................................................... 96Maintenance Free Battery............................ 332Maintenance Schedule................................. 327Malfunction Indicator Light
(Check Engine)..................................... 127, 131Manual Park Release............................................ 321Service..................................................... 387Map/Reading Lights........................................ 66Marker Lights, Side....................................... 355Media Hub....................................................... 87Memory Feature (Memory Seats).................... 32Memory Seat..................................... 31, 32, 58Memory Seats And Radio................................. 32Methanol...................................................... 379Mini-Trip Computer....................................... 122Mirrors............................................................. 57Automatic Dimming..................................... 57Electric Remote........................................... 58Exterior Folding............................................ 60Heated.................................................. 57, 60Memory....................................................... 31Outside................................................. 57, 58Rearview.............................................57, 295Vanity.......................................................... 57Modifications/AlterationsVehicle......................................................... 10
Monitor, Tire Pressure System...................... 247Mopar Parts.................................................. 386MP3 Control.....................................................87Multi-Function Control Lever............................63
N
New Vehicle Break-In Period......................... 136
O
Occupant Restraints..................................... 250Octane Rating, Gasoline (Fuel)............. 378, 382Oil Change Indicator...................................... 114Reset........................................................ 114Oil Filter, Change........................................... 334Oil Filter, Selection........................................ 334Oil Pressure Light.......................................... 125Oil, Engine............................................ 333, 382Capacity.................................................... 381Checking................................................... 332Dipstick..................................................... 332Disposal.................................................... 334Filter................................................ 334, 382Filter Disposal........................................... 334Identification Logo.................................... 333Materials Added To................................... 334Pressure Warning Light............................. 125Recommendation............................ 333, 381Synthetic................................................... 334Viscosity.................................................... 381
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395
Adjustable Upper Shoulder Belt Anchorage
............................................. 255Automatic Locking Retractor (ALR)............ 258Child Restraints......................................... 275Energy Management Feature.................... 258Extender.................................................... 257Front Seat.............................. 251, 252, 254Inspection................................................. 292Lap/Shoulder Belt Operation.................... 254Lap/Shoulder Belt Untwisting...................254Lap/Shoulder Belts................................... 252Operating Instructions............................... 254Pregnant Women...................................... 258Pretensioners............................................ 258Rear Seat.................................................. 252Reminder.................................................. 251Seat Belt Extender.................................... 257Seat Belt Pretensioner.............................. 258Untwisting Procedure................................ 254Seat Belts Maintenance................................ 375Seats................................................. 32, 47, 51Adjustment...................... 32, 33, 34, 35, 47Bench.......................................................... 35Heated........................................................ 51Memory....................................................... 31Power................................................... 47, 49Rear Folding................................................ 32
Reclining...................................................... 34Seatback Release......................... 33, 34, 35Stow ‘n Go (Fold in Floor)............................ 42Tilting............................................. 32, 33, 34Security Alarm............................................... 126Arm The System.......................................... 22Disarm The System..................................... 22Selection Of Coolant (Antifreeze).................. 382Sentry Key (Immobilizer).................................. 17Service Assistance........................................ 384Service Contract........................................... 385Service Manuals........................................... 387ShiftingAutomatic Transmission........................... 141Shoulder Belts.............................................. 252Side View Mirror Adjustment............................ 57Signals, Turn........................ 63, 129, 293, 355SmartBeams.................................................... 64Snow Chains (Tire Chains)............................ 370Snow Tires.................................................... 367Spare Tire Changing..................................... 298Spare Tire Stowage....................................... 306Spare Tires........................ 299, 367, 368, 369Spark Plugs................................................... 382SpecificationsOil............................................................. 382
Speed ControlAccel/Decel (ACC Only)............................. 152Cancel....................................................... 149Resume.................................................... 149Speed Control (Cruise Control)...................... 149Starting.................................................. 19, 132Button..........................................................17Cold Weather............................................ 135Engine Fails To Start................................. 135Remote........................................................19Starting And Operating.................................. 132Starting Procedures...................................... 132Steering........................................................ 144Tilt Column...................................................30Wheel, Heated.............................................30Wheel, Tilt....................................................30Storage, Vehicle...............................................82Stow ‘n Go (Fold In Floor) Seats.......................42Stow ‘n Vac................................................... 101Stuck, Freeing............................................... 323Sun Roof...................................................95, 96Sunglasses Storage.........................................83Supplemental Restraint System – Air Bag.... 262Sway Control, Trailer..................................... 240Symbol Glossary...............................................10Synthetic Engine Oil...................................... 334System, Remote Starting.................................1911

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