Jeep Grand Cherokee (2023 year). Manual in english — page 22

348

SERVICING AND MAINTENANCE

Please review these recommendations for using

Organic Additive Technology (OAT) engine coolant

that meets the requirements of the manufacturer

Material Standard MS.90032. When adding

engine coolant:



We recommend using Mopar® Antifreeze/

Coolant 10 Year/150,000 Mile (240,000 km)

Formula OAT that meets the requirements of the

manufacturer Material Standard MS.90032.



Mix a minimum solution of 50% OAT engine

coolant that meets the requirements of the

manufacturer Material Standard MS.90032

and distilled water. Use higher concentrations

(not to exceed 70%) if temperatures below

−34°F (−37°C) are anticipated. Please contact

an authorized dealer for assistance.



Use only high purity water such as distilled or

deionized water when mixing the water/engine

coolant solution. The use of lower quality water

will reduce the amount of corrosion protection

in the engine cooling system.

NOTE:



It is the owner's responsibility to maintain the

proper level of protection against freezing

according to the temperatures occurring in the

area where the vehicle is operated.



Use care when filling under hood fluids such as

engine oil, washer fluid, antifreeze, etc., to mini

-

mize spillage onto the top of the engine. Any

excess fluid that is spilled onto the top of the

engine should be removed using compressed

air or an absorbent cloth.



Some vehicles require special tools to add

coolant properly. Failure to fill these systems

properly could lead to severe internal engine

damage. If any coolant is needed to be added to

the system, please contact a local authorized

dealer.



Mixing engine coolant types is not recom

-

mended and can result in cooling system

damage. If HOAT and OAT coolant are mixed in

an emergency, have an authorized dealer drain,

flush, and refill with OAT coolant (conforming to

MS.90032) as soon as possible.

Cooling System Pressure Cap

The cap must be fully tightened to prevent loss of

engine coolant (antifreeze), and to ensure that

engine coolant will return to the radiator from the

coolant expansion bottle/recovery tank (if

equipped).
The cap should be inspected and cleaned if there

is any accumulation of foreign material on the

sealing surfaces.

Disposal Of Used Coolant

Used ethylene glycol-based coolant (antifreeze) is

a regulated substance requiring proper disposal.

Check with your local authorities to determine the

disposal rules for your community. To prevent

ingestion by animals or children, do not store

ethylene glycol-based coolant in open containers

or allow it to remain in puddles on the ground,

clean up any ground spills immediately. If ingested

by a child or pet, seek emergency assistance

immediately.

Coolant Level

The coolant bottle provides a quick visual method

for determining that the coolant level is adequate.

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

WARNING!



Do not open a hot engine cooling system.

Never add engine coolant (antifreeze) when

the engine is overheated. Do not loosen or

remove the cap to cool an overheated engine.

Heat causes pressure to build up in the

cooling system. To prevent scalding or injury,

do not remove the pressure cap while the

system is hot or under pressure.



Do not use a pressure cap other than the one

specified for your vehicle. Personal injury or

engine damage may result.

SERVICING AND MAINTENANCE

349

coolant (antifreeze) in the bottle should be

between the ranges indicated on the bottle.
The radiator normally remains completely full, so

there is no need to remove the radiator/coolant

pressure cap unless checking for engine coolant

freeze point or replacing 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, only OAT coolant that

meets the requirements of the manufacturer

Material Standard MS.90032 should be added to

the coolant bottle. Do not overfill.

Engine Coolant Level — 2.0L

With the engine OFF and cold, the level of the

engine coolant should be within the OK range

between the ADD and FULL range on the dipstick.
1. Remove the cap with level dipstick from the

engine coolant bottle.

2. Clean off the coolant from the dipstick.
3. Rest the cap on the opening of the coolant

bottle without tightening the cap.

4. Remove the cap with dipstick and check the

coolant level on the dipstick.

The radiator normally remains completely full, so

there is no need to remove the radiator/coolant

pressure cap unless checking for engine coolant

freeze point or replacing 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, only OAT coolant that

meets the requirements of the manufacturer

Material Standard MS.90032 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.

WARNING!



Do not open a hot engine cooling system.

Never add engine coolant (antifreeze) when

the engine is overheated. Do not loosen or

remove the cap to cool an overheated engine.

Heat causes pressure to build up in the

cooling system. To prevent scalding or injury,

do not remove the pressure cap while the

system is hot or under pressure.



Do not use a pressure cap other than the one

specified for your vehicle. Personal injury or

engine damage may result.

8

350

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.

B

RAKE

S

YSTEM

In order to ensure brake system performance, all

brake system components should be inspected

periodically. For the proper maintenance intervals

Ú

page 331.

Fluid Level Check — Brake Master Cylinder

The fluid level of the 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.

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 402. 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.



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!

SERVICING AND MAINTENANCE

351

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

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's specified

transmission fluid

Ú

page 402. It is important to

maintain the transmission fluid at the correct level

using the recommended fluid.

NOTE:

No chemical flushes should be used in any trans

-

mission; only the approved lubricant should be

used.

F

RONT

/R

EAR

A

XLE

F

LUID

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.

Front Axle Fluid Level Check

The front axle oil level needs to be no lower than

1/8 inch (3 mm) below the bottom of the fill hole.
The front axle fill and drain plugs should be

tightened to 22 to 29 ft-lb (30 to 40 N·m).

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.

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.

CAUTION!

Do not overtighten the plugs as it could damage

them and cause them to leak.

8

352

SERVICING AND MAINTENANCE

Rear Axle Fluid Level Check

The rear axle oil level needs to be no lower than

1/8 inch (3 mm) below the bottom of the fill hole.
The rear axle fill and drain plugs should be

tightened to 22 to 29 ft-lb (30 to 40 N·m).

Selection Of Lubricant

Use only the manufacturer's recommended fluid

Ú

page 402.

T

RANSFER

C

ASE

Fluid Level Check

For normal service, periodic fluid level checks are

not required. When the vehicle is serviced for other

reasons the exterior surfaces of the transfer case

assembly should be inspected. If oil leakage is

suspected inspect the fluid level.

Adding Fluid

Add fluid at the filler hole, until it runs out of the

hole, when the vehicle is in a level position.

Drain

First remove fill plug, then remove drain plug.

Recommended tightening torque for drain and fill

plugs is 15 to 25 ft-lb (20 to 34 N·m).

Selection Of Lubricant

Use only the manufacturer's recommended fluid

Ú

page 402.

F

USES

General Information

CAUTION!

Do not overtighten the plugs as it could damage

them and cause them to leak.

CAUTION!

When installing plugs, do not overtighten. You

could damage them and cause them to leak.

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 indi

-

cated 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 mate

-

rial. 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

ignition is off and that all the other services

are switched off and/or disengaged.



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.

SERVICING AND MAINTENANCE

353

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

Underhood Fuses

The Power Distribution Center (PDC) is located on

the passenger side of the engine compartment,

behind the headlamp. 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.

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!

If it is necessary to wash the engine

compartment, take care not to directly hit the

fuse box, and the windshield wiper motor with

water.

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

354

SERVICING AND MAINTENANCE

Power Distribution Center

NOTE:

Fuses for safety systems must be serviced by an authorized dealer.

SERVICING AND MAINTENANCE

355

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

F01

–

–

Crank Batt

F02

–

–

Spare

F03

500 Amp Gray

–

Starter

F04

250 Amp Gray

–

Alternator

F05

–

–

Spare

F06

–

–

Aux Battery Input

F07

100 Amp Gray

–

Rad Fan

F08

80 Amp Gray

–

Electrical Power Steering Module

(EPS) #1

F09

80 Amp Gray

–

Electrical Power Steering Module

(EPS) #2

F10

80 Amp Gray

–

Feed to IPDC

F11

150 Amp Gray

–

PCR *

F12

–

–

Not Populated

F13

40 Amp Green

–

Starter

F14

–

10 Amp Red

GNMM / VPMS*

F15

–

10 Amp Red

ECM*

F16

–

15 Amp Blue

Cluster

F17A

–

10 Amp Red

EPS

F17B

Not Populated

F18

–

–

Spare

8

356

SERVICING AND MAINTENANCE

F19

30 Amp Pink

–

BSM Valves #2*

F20

–

–

Not Populated

F21

–

–

Not Populated

F22

–

–

Not Populated

F23A

–

10 Amp Red

ECM / EPS / PIM / SLM / GPF

F23B

Air Suspension / ELSD RR

F24

–

–

Not Populated

F25

–

–

Not Populated

F26

50 Amp Red

–

BSM Motor #2*

F27

30 Amp Pink

–

Rear Defroster (EBL)

F28

–

–

Not Populated

F29

–

–

Not Populated

F30

–

–

Not Populated

F31

–

–

Not Populated

F32

–

–

Not Populated

F33

–

–

Not Populated

F34

–

–

Not Populated

F35

–

–

Not Populated

F36

50 Amp Red

–

BCM Feed #1

F37

30 Amp Pink

–

DTCM

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

SERVICING AND MAINTENANCE

357

F38

–

–

Not Populated

F39

–

–

Not Populated

F40

–

5 Amp Tan

Battery Sensor #1

F41

–

20 Amp Yellow

CADM MAP*

F42

–

–

Not Populated

F43

–

10 Amp Red

Engine Control Module (ECM)

F44

–

–

Not Populated

F45

–

15 Amp Blue

Front Axle Disconnect

F46

–

–

Not Populated

F47

–

–

Not Populated

F48

–

10 Amp Red

CVPAM

F49

–

–

Not Populated

F50

–

–

Not Populated

F51

–

20 Amp Yellow

Fuel Pump

F52

–

–

Not Populated

F53

–

–

Not Populated

F54

–

20 Amp Yellow

Headlamp LT

F55

–

15 Amp Blue

BPCM *

F56

–

–

Not Populated

F57

–

–

Not Populated

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

8

358

SERVICING AND MAINTENANCE

F58

–

–

Not Populated

F59

–

–

Not Populated

F60

–

–

Not Populated

F61

–

–

Not Populated

F62

–

–

Not Populated

F63

–

20 Amp Yellow

Camera Washer Front

F64

–

15 Amp Blue

Smart Bar Control Module

F65

–

15 Amp Blue

ACT Grille Shutter / ACT Rear Axle

Coolant Valve / Active Air Dam

F66

–

20 Amp Yellow

Horns

F67

–

10 Amp Red

DTCM / ASBS / Switchable Engine

Mount / BSM #2

F68

–

20 Amp Yellow

Headlamp RT

F69

–

–

Not Populated

F70

–

20 Amp Yellow

IGN Coil / IGN Capacitors / Fuel Inj

F71

–

–

Not Populated

F72

–

–

Not Populated

F73

–

–

Not Populated

F74

–

–

Not Populated

F75

–

–

Not Populated

F76

–

5 Amp Tan

IDCM *

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

SERVICING AND MAINTENANCE

359

F77

–

20 Amp Yellow

TCM SBW

F78

–

20 Amp Yellow

ECM

F79

–

10 Amp Red

Fuel Door / ELCM / Fuel Injectors *

F80

20 Amp Blue

–

ECM

F81

40 Amp Green

–

BCM Feed

F82

–

–

Not Populated

F83

40 Amp Green

–

LTR Coolant Pump* / Trans Oil Pump *

F84

–

–

Not Populated

F85

–

10 Amp Red

PCR *

F86

50 Amp Red

–

BSM Feed #1

F87

–

–

Not Populated

F88

50 Amp Red

–

BSM Feed Motor #2

F89

–

–

Not Populated

F90

–

–

Not Populated

F91

–

–

Not Populated

F92

20 Amp Blue

–

Front De-Icer

F93

–

–

Not Populated

F94

–

10 Amp Red

A/C Compressor Clutch

F95

–

10 Amp Red

Batt Cool Heater *

F96

–

5 Amp Tan

Elect Cool Heater *

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

8

360

SERVICING AND MAINTENANCE

F97

–

–

Not Populated

F98

–

–

Not Populated

F99

–

–

Not Populated

F100A

–

–

Not Populated

F100B

–

–

Not Populated

F101

–

–

Not Populated

F102

–

–

Not Populated

F103

30 Amp Pink

–

Frt Wiper

F104A

–

15 Amp Blue

PECP Low Temp Passive Pump *

F104B

AHP High Temp Aux Pump *

F105A

–

15 Amp Blue

BCP Low Temp Active Pump *

F105B

LTR Coolant Pump

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

SERVICING AND MAINTENANCE

361

Interior Power Distribution Center

The Interior Power Distribution Center is located

underneath the steering column on the driver’s

side of the vehicle. This center contains cartridge

fuses, micro fuses, relays, and circuit breakers.

Fuse numbers are labeled next to each fuse cavity,

fuse descriptions correspond with the following

chart.

Interior PDC Location

NOTE:

Fuses for safety systems must be serviced by an

authorized dealer.

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

F01

–

–

Spare

F02

25 Amp Clear

–

MTR Sunshade Sunroof Dual Pane /

MTR sunroof single Pane

F03

–

15 Amp Blue

MOD Seat Heater Frt (Steering

Wheel)*

F04

–

10 Amp Red

Night Vision Module / Driver

Monitoring Camera (DMC)

F05

–

–

Spare

F06

–

–

Spare

F07

–

–

Spare

F08

–

15 Amp Blue

Automatic Gearbox Shifter Module

(AGSM) / Steering Column Lock

F09

–

–

Spare

8

362

SERVICING AND MAINTENANCE

F10

40 Amp Green

–

HVAC Blower Motor

F11

–

–

Spare

F12

–

20 Amp Yellow

Assy Cigar Lighter

F13

–

10 Amp Red

Assy Mirror Inside Rearview / Digital

TV (DTV) */ Sunroof Single - Dual

Pane / Port UC1 Dual USB RR /

Interior Monitoring Camera

F14

–

–

Spare

F15A

–

–

Spare

F15B

–

–

Spare

F16

–

10 Amp Red

MOD ORC

F17

–

–

Spare

F18

–

–

Spare

F19

–

–

Spare

F20

–

10 Amp Red

Overhead Console Assy (OHC) W/

Sunshade / Intrusion Module /

Intrusion Sensor / Siren / Head Up

Display (HUD) / Digital TV (DTV) *

F21

30 Amp Pink

–

Trailer Tow Electric Brake -

Aftermarket

F22

–

–

Spare

F23

–

–

Spare

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

SERVICING AND MAINTENANCE

363

F24

–

–

Spare

F25

–

–

Spare

F26

–

–

Spare

F27

–

–

Spare

F28

–

–

Spare

F29

–

–

Spare

F30

–

–

Spare

F31

–

–

Spare

F32

–

15 Amp Blue

MOD ICS Switch Bank / SW Bank

Upper / SW EPB / Aux Switch Bank

Module (ASBM)

F33

–

15 Amp Blue

Transfer case SW / Humidity Rain

Light Sensor (HRLS) / Suspension

SW*

F34

–

–

Spare

F35

–

10 Amp Red

IRCAM Heater

F36

–

–

Spare

F37

–

–

Spare

F38

–

–

Spare

F39

–

–

Spare

F40

–

–

Spare

Cavity

Cartridge Fuse

Micro Fuse

Description

* If Equipped

8