RAM 1500 (2022 year). Manual in english — page 27

SERVICING AND MAINTENANCE

427

Checking Coolant Level — 3.6L Engine

The level of the coolant in the pressurized coolant

bottle should be between the “MIN” and “MAX”

range on the bottle when the engine is cold.
The radiator normally remains completely full, so

there is no need to remove the cap unless

checking for coolant freeze point or replacing

engine coolant (antifreeze). Advise your service

attendant of this. As long as the engine operating

temperature is satisfactory, the coolant bottle

need only be checked once a month. When

additional engine coolant is needed to maintain

the proper level, it should be added to the coolant

bottle. Do not overfill.

Checking Coolant Level — 5.7L Engines

With the engine off and cold, the level of the engine

coolant should be between the ADD and SAFE

range on the dipstick.
To check the coolant level:
1. Open the coolant reservoir.
2. Lift and remove the plastic dipstick from the

reservoir neck.

Coolant Reservoir Dipstick

3. Check the coolant level on the dipstick.

The radiator normally remains completely full, so

there is no need to remove the radiator cap unless

checking for engine coolant (antifreeze) freeze

point or replacing engine coolant. Advise your

service attendant of this. As long as the engine

operating temperature is satisfactory, the coolant

bottle need only be checked once a month.
When additional engine coolant is needed to

maintain the proper level, it should be added to the

coolant bottle. Do not overfill.

Cooling System Notes

NOTE:

When the vehicle is stopped after a few miles/kilo

-

meters 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 corro

-

sion protection of your engine which contains

aluminum components.

8

428

SERVICING AND MAINTENANCE

(Continued)



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 neces

-

sary, install ONLY the correct type thermostat.

Other designs may result in unsatisfactory

engine cooling performance, poor gas mileage,

and increased emissions.

C

HARGE

A

IR

C

OOLER

— I

NTER

-C

OOLER

(D

IESEL

E

NGINE

)

The charge air cooler is positioned in front of the

radiator and the air conditioner condenser. Air

enters the engine through the air cleaner and

passes through the turbocharger, where it is

pressurized. This pressurized air rapidly reaches

high temperature. The air is then directed through

a hose to the charge air cooler and through

another hose to the intake manifold of the engine.

This cooling process enables more efficient

burning of fuel resulting in fewer emissions.
To guarantee optimum performance of the system,

keep the surfaces of the charge air cooler,

condenser and radiator clean and free of debris.

Periodically check the hoses leading to and from

the charge air cooler for cracks or loose clamps

resulting in loss of pressure and reduced engine

performance.

B

RAKE

S

YSTEM

In order to ensure brake system performance, all

brake system components should be inspected

periodically

Ú

page 398.

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

Ú

page 481.

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

Ú

page 481. 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.



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.

SERVICING AND MAINTENANCE

429

A

UTOMATIC

T

RANSMISSION

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.

Fluid Level Check

The fluid level is preset at the factory and does not

require adjustment under normal operating

conditions. Routine fluid level checks are not

required, therefore the transmission has no

dipstick. An authorized dealer can check your

transmission fluid level using special service tools.
If you notice fluid leakage or transmission

malfunction, visit an authorized dealer

immediately to have the transmission fluid level

checked. Operating the vehicle with an improper

fluid level can cause severe transmission damage.

Fluid And Filter Changes

Under normal operating conditions, the fluid

installed at the factory will provide satisfactory

lubrication for the life of the vehicle.

Routine fluid and filter changes are not required.

However, change the fluid and filter if the fluid

becomes contaminated (with water, etc.), or if the

transmission is disassembled for any reason.

Selection Of Lubricant

It is important to use the proper transmission fluid

to ensure optimum transmission performance and

life. Use only the manufacturer recommended

transmission fluid

Ú

page 481. It is important to

maintain the transmission fluid at the correct level

using the recommended fluid. No chemical flushes

should be used in any transmission; only the

approved lubricant should be used.



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.

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.

WARNING!

CAUTION!

If a transmission fluid leak occurs, visit an

authorized dealer immediately. Severe

transmission damage may occur. An authorized

dealer has the proper tools to adjust the fluid

level accurately.

CAUTION!

Using a transmission fluid other than the

manufacturer’s recommended fluid may cause

deterioration in transmission shift quality and/or

torque converter shudder

Ú

page 481.

8

430

SERVICING AND MAINTENANCE

(Continued)

R

EAR

A

XLE

A

ND

4

X

4 F

RONT

D

RIVING

A

XLE

F

LUID

L

EVEL

For normal service, periodic fluid level checks are

not required. When the vehicle is serviced for other

reasons the exterior surfaces of the axle assembly

should be inspected. If gear oil leakage is

suspected inspect the fluid level

Ú

page 481. This

inspection should be made with the vehicle in a

level position.
The fluid level should be even with the bottom of

the fill hole (within 1/4 in (6.4 mm) of edge of hole)

for the front axle and rear axle.

Drain And Refill

For the proper maintenance intervals

Ú

page 398.

Lubricant Selection

For further information

Ú

page 481.

NOTE:

The presence of water in the gear lubricant will

result in corrosion and possible failure of differ

-

ential components. Operation of the vehicle in

water, as may be encountered in some off-highway

types of service, will require draining and refilling

the axle to avoid damage.

Limited-Slip Differentials
Rear axles equipped with a Limited Slip Differential

require that 5 oz. (148 ml) Mopar® Limited Slip

Additive be added to the gear lubricant

Ú

page 481. The Mopar® Limited Slip Additive

should be added to the gear lubricant whenever a

fluid change is made to an axle equipped with a

Limited Slip Differential.

NOTE:

When refilling a limited slip differential axle which

requires a friction modification additive, the

additive should be added before the gear lubricant

to ensure proper additive fill.

T

RANSFER

C

ASE

Fluid Level Check

This fluid level can be checked by removing the

filler plug. The fluid level should be to the bottom

edge of the filler plug hole (or within 1/8 inch of the

bottom) with the vehicle in a level position.

Drain And Refill

For the proper maintenance intervals

Ú

page 398.

Selection Of Lubricant

Use only the manufacturer recommended fluid

Ú

page 481.

F

USES

General Information

WARNING!



When replacing a blown fuse, always use an

appropriate replacement fuse with the same

amp rating as the original fuse. Never replace a

fuse with another fuse of higher amp rating. The

use of a fuse with a rating other than indicated

may result in a dangerous electrical system

overload. If a properly rated fuse continues to

blow, it indicates a problem in the circuit that

must be corrected. Never replace a blown fuse

with metal wires or any other material. Do not

place a fuse inside a circuit breaker cavity or

vice versa. Failure to use proper fuses may

result in serious personal injury, fire and/or

property damage.



Before replacing a fuse, make sure that the igni

-

tion is off and that all the other services are

switched off and/or disengaged.

SERVICING AND MAINTENANCE

431

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 using power outlets for

extended periods of time with the engine off may

result in vehicle battery discharge.

Blade Fuses

External Power Distribution Center

The Power Distribution Center is located in the

engine compartment near the battery. This center

contains cartridge fuses, micro fuses, relays, and

circuit breakers. A description of each fuse and

component may be stamped on the inside cover,

otherwise the cavity number of each fuse is

stamped on the inside cover that corresponds to

the following chart.



If the replaced fuse blows again, contact an

authorized dealer.



If a general protection fuse for safety systems

(air bag system, braking system), power unit

systems (engine system, transmission system)

or steering system blows, contact an authorized

dealer.

CAUTION!

If it is necessary to wash the engine

compartment, take care not to directly hit the

fuse box, and the windshield wiper motors with

water.

WARNING!

1 — Fuse Element
2 — Blade Fuse with a good/functional fuse

element
3 — Blade fuse with a bad/not functional fuse

element (blown fuse)

CAUTION!



When installing the power distribution center

cover, it is important to ensure the cover is

properly positioned and fully latched. Failure

to do so may allow water to get into the power

distribution center and possibly result in an

electrical system failure.

8

432

SERVICING AND MAINTENANCE

Underhood Power Distribution Center

SERVICING AND MAINTENANCE

433

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

F01

–

25 Amp Clear

Fuel Pump Motor

F02

–

–

Spare

F03

–

5 Amp Tan

MGU *

F04

–

–

Spare

F05

–

–

Spare

F06

–

10 Amp Red

OUTPUT TO UPFITTER PDC *

F07

–

–

Spare

F08

20 Amp Blue

–

Trailer Tow Backup

F09

–

20 Amp Yellow

Trailer Stop / Turn Lamp Left

F10

–

20 Amp Yellow

Trailer Stop / Turn Lamp Right

F11

–

15 Amp Blue

ID/CLEARANCE LIGHTS *

F12

20 Amp Blue

–

Trailer Tow Park Lamp

F13

–

–

Spare

F14

–

10 Amp Red

AC Clutch

F15

–

5 Amp Tan

Intelligent Battery Sensor (IBS)

F16

–

–

Spare *

F17

–

20 Amp Yellow

Air Suspension

F18

–

15 Amp Blue

AGS / Rear Axle Cooling Valve / Active Air Dam

F19

–

–

Spare

F20

–

20 Amp Yellow

Adjustable Pedals *

8

434

SERVICING AND MAINTENANCE

F21

30 Amp Pink

–

Power Side Step *

F22

50 Amp Red

–

Air Module *

F23

–

–

Spare

F24

–

20 Amp Yellow

TCM SBW

F25

40 Amp Green

–

MOD CBC 4 Exterior Lights 2

F26

50 Amp Red

–

ESP Module

F27

30 Amp Pink

–

Front Wiper

F28

–

10 Amp Red

PCM / ECM

F29

40 Amp Green

–

ESP Module

F30

–

–

Spare

F31

–

–

Spare

F32

20 Amp Blue

–

ECM / PCM

F33

30 Amp Pink

–

Brake Vacuum Pump

F34

–

–

Spare

F35

–

10 Amp Red

PCM / ECM / Power Pack Unit (PPU) Motor Generator Unit

(MGU) Wake Up * / EPS / ATMM / ESP

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

SERVICING AND MAINTENANCE

435

F36

–

–

Spare

F37

–

5 Amp Tan

R / S Output to iPDC

F38

–

10 Amp Red

DTCM / Active CL TEMP VLV

F39

–

15 Amp Blue

MOD ATMM *

F40

40 Amp Green

–

Starter

F41

–

10 Amp Red

IRCAM Heaters

F42

20 Amp Blue

–

AUX SWITCH #5 *

F43

–

20 Amp Yellow

MGU Coolant Pump / ADCM *

F44

–

10 Amp Red

Trailer Camera *

F45

–

10 Amp Red

ADCM *

F46

30 Amp Pink

–

Fuel Heater *

F47

30 Amp Pink

–

Rear Defroster

F48

–

–

Spare

F49

30 Amp Pink

–

Htr Ctrl *

F50

20 Amp Blue

–

AUX SWITCH #6 *

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

8

436

SERVICING AND MAINTENANCE

F51

25 Amp White

–

FUEL PUMP MOTOR #1 *

F52

–

–

Spare

F53

–

10 Amp Red

Supply / Purging Pump *

F54

–

15 Amp Blue

PCM *

10 Amp Red

Vapor Blocking Valve *

F55

–

15 Amp Blue

RT HID Headlamp

F56

–

–

Spare

F57

–

20 Amp Yellow

Horn

F58

25 Amp White

–

FUEL PUMP MOTOR #2 *

F59

–

25 Amp Clear

Injectors / IGN Coil / Glow Plug Module *

F60

–

20 Amp Yellow

ECM / PCM / ACT Short Running Valve / LTR Coolant Pump *

F61

–

15 Amp Blue

LT HID Headlamp

F62

60 Amp Blue

–

Glow Plug *

40 Amp Green

LTR Coolant Pump *

F63

20 Amp Blue

–

NOx Sensor *

F64

–

10 Amp Red

PM Sensor *

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

SERVICING AND MAINTENANCE

437

Internal Power Distribution Center

The Power Distribution Center is located under the

driver’s side instrument panel. This center

contains cartridge fuses, micro fuses, relays, and

circuit breakers.

Fuse Cover Panel

See below steps for accessing fuses:
1. Locate and remove the two screws from the

lower portion of the fuse panel cover.

Fuse Panel Screws Location

2. After removing the screws, gently pull both the

left and right side of the fuse panel cover to

release the fastener clips.

Interior Fuse Box Location

3. Reverse the procedure to reinstall the fuse

panel cover.

8

438

SERVICING AND MAINTENANCE

Internal Fuse Chart

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

F01

30 Amp Pink

–

Trailer Tow Receptacle

F02

–

–

Spare

F03

–

20 Amp Yellow

Module Seat Heater Front (Pass)

F04

–

–

Spare

F05

–

20 Amp Yellow

Module PPU Cooling Fan *

F06

–

–

Spare

F07

40 Amp Green

–

Mod CBC 3 PWR Locks

F08

–

–

Spare

F09

–

–

Spare

F10

40 Amp Green

–

HVAC Blower Motor

F11

–

5 Amp Tan

Output to Under-hood Power Distribution Center (UPDC) Run

Coil

F12

–

25 Amp Clear

Mod Audio Amplifier / Active Noise Cancellation

F13

–

20 Amp Yellow

Mod Seat Heater Front (Driver)

F14

–

15 Amp Blue

Mod Seat Heater Front (Steering Wheel)

F15

–

–

Spare

F16

–

–

Spare

F17

–

20 Amp Yellow

LT Spot Lamp *

F18

30 Amp Pink

–

Motor Sunshade Sunroof

SERVICING AND MAINTENANCE

439

F19

–

–

Spare

F20

–

20 Amp Yellow

Comfort Rear Seat Module (CRSM) (Heat Rear RT)

F21

–

–

Spare

F22

–

–

Spare

F23

–

–

Spare

F24

–

15 Amp Blue

Mod RF Hub / Mod Ignition / Mod Cluster CNN

F25

40 Amp Green

–

Mod Integrated Trailer Brake

F26

–

15 Amp Blue

Mod Cluster CCN / Mod Cyber Security / Trailer Gateway

Module (360 Camera)

F27

–

5 Amp Tan

Mod Cluster CCN / Mod SGW

F28

–

10 Amp Red

Mod 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 Red

Assy Overhead Console / Switch 911 / Switch Assist /

Sunshade / HUD

F34

–

15 Amp Blue

Frt & RR Ventilated Seat Motor

F35

–

10 Amp Red

Mod Inverter / Mtr Sunshade Sunroof / Mtr Dual Sunroof /

USB Charge Only

F36

40 Amp Green

–

Mod CBC 2 Exterior Light 1

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

8

440

SERVICING AND MAINTENANCE

F37

–

–

Spare

F38

–

–

Spare

F39

–

–

Spare

F40

20 Amp Blue

–

Dome Pursuit Vehicle *

F41 A&B

–

15 Amp Blue

Lumbar Support & Pass SW / Steering Column Control

Module / HVAC Control Module / ICS Switch Bank / Upper

Switch Bank

F42 A&B

–

10 Amp Red

Mod Transfer Case Switch Module (TCSM) / SBW / Electric

Park Brake SW / Module TPM Trailer / Module Gateway Can-C

Trailer TPM / Seat LT & RT Vent

F43 A&B

–

10 Amp Red

Port Diagnostics / Front & Rear USB

F44

–

20 Amp Yellow

Radio / DCSD / Telematics Box Mod / Trailer Gateway Module

(360)

F45

30 Amp Pink

–

Mod Door MUX Driver

F46

30 Amp Pink

–

Mod Door MUX Passenger

F47

–

–

Spare

F48A

–

10 Amp Red

Rear View Mirror / SW Window Passenger / Rear USB /

Wireless Charging Pad Mod

F49

–

15 Amp Blue

Mod CVPM / SNSR Blind Spot / HDLP Adaptive Front Lighting

Sensor (AFLS)

F50A

–

10 Amp Red

Battery PACK Control Mod *

F51 A&B

–

–

Spare

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

SERVICING AND MAINTENANCE

441

F52

20 Amp Blue

–

Direct Battery Feed *

F53

–

10 Amp Red

Trailer Reverse Steering Control / Trailer Steering Control

Knob

F54A & F54B

–

20 Amp Yellow

Power Outlet Center Seat Battery Fed Position
Power Outlet Center Seat Ignition Fed Position

F55

25 Amp White

–

Upfitter *

F56

30 Amp Pink

–

Mod Network Interface *

F57

20 Amp Blue

–

Direct Battery Feed *

F58

20 Amp Blue

–

Direct Battery Feed *

F60

50 Amp Red

–

Mod Inverter

F61

–

–

Spare

F62 A&B

–

10 Amp Red

ITBM / Mod Occupant Class / Mod IAIR Suspension / Mod

HVAC / Snsr In car Temp / Integrated Radar Camera Mod

(IRCM) / Humidity Rain & Light Sensor (HRLS) / Parktronics

System Mod (PTS) / Gateway Can-C Trailer TPM Mod

F63

–

–

Spare

F64

–

–

Spare

F65

–

10 Amp Red

Mod ORC

F66

–

10 Amp Red

Run - Accessory Feed

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

8

442

SERVICING AND MAINTENANCE

Circuit Breakers

B

ULB

R

EPLACEMENT

Replacement Bulbs, Names, And Part Numbers

In the instance a bulb needs to be replaced, this section includes bulb description and replacement part numbers. All of the inside bulbs are brass or glass-wedge

base. Aluminum base bulbs are not approved.

NOTE:

See an authorized dealer for LED bulb replacement.

Cavity

Circuit Breaker

Description

CB1

25 Amp

Driver Window SW Rear PWR Windows / Overhead

SW Rear Defrost

CB2

25 Amp

Driver PWR Seat / Driver Seat Memory Mod

CB3

25 Amp

Passenger Power Seat / Passenger Seat Memory

Mod

Interior Bulbs

Bulb Name

Bulb Number

Overhead Console Lamps

TS 212–9

Dome Lamp

7679

NOTE:

For lighted switches, see an authorized dealer for replacement instructions.