2020 JEEP WRANGLER UNLIMITED air conditioning

GETTING TO KNOW YOUR VEHICLE
44
Climate Control Functions
A/C (Air Conditioning)
The Air Conditioning (A/C) button allows the
operator to manually activate or deactivate
the air conditioning system. When the air
conditioning system is turned on, cool dehu-
midified air will flow through the outlets into
the cabin. For improved fuel economy, press
the A/C button to turn off the air conditioning
and manually adjust the blower and airflow
mode settings. Also, make sure to select only
Panel, Bi-Level, or Floor modes.
NOTE:
For Manual Climate Controls, if the system
is in Mix, Floor or Defrost Mode, the A/C
can be turned off, but the A/C system shall
remain active to prevent fogging of the
windows.
If fog or mist appears on the windshield or
side glass, select Defrost mode, and
increase blower speed if needed.
If your air conditioning performance
seems lower than expected, check the
front of the A/C condenser (located in front
of the radiator), for an accumulation of dirt or insects. Clean with a gentle water spray
from the front of the radiator and through
the condenser.
MAX A/C
MAX A/C sets the control for maximum
cooling performance.

Press and release to toggle between MAX A/C
and the prior settings. The button illuminates
when MAX A/C is on.

In MAX A/C, the blower level and mode position
can be adjusted to desired user settings.
Pressing other settings will cause the MAX A/C
operation to switch to the selected setting and
MAX A/C to exit.

Recirculation
In cold weather, use of Recirculation mode
may lead to excessive window fogging. The
Recirculation feature may be unavailable
(button on the touchscreen greyed out) if
conditions exist that could create fogging on
the inside of the windshield.
Automatic Temperature Control (ATC) —
If Equipped
Automatic Operation
1. Push the AUTO button on the faceplate, or the AUTO button on the touchscreen
on the Automatic Temperature Control
(ATC) Panel.
2. Next, adjust the temperature that you would like the system to maintain by
adjusting the driver and passenger
temperature control buttons. Once the
desired temperature is displayed, the
system will achieve and automatically
maintain that comfort level.
3. When the system is set up for your comfort level, it is not necessary to
change the settings. You will experience
the greatest efficiency by simply allowing
the system to function automatically.
NOTE:
It is not necessary to move the tempera-
ture settings for cold or hot vehicles. The
system automatically adjusts the tempera-
ture, mode, and blower speed to provide
comfort as quickly as possible.
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45
The temperature can be displayed in U.S.
or Metric units by selecting the U.S./
Metric customer-programmable feature.
Refer to the “Uconnect Settings” in
“Multimedia” in the Owner’s Manual for
further information.
To provide you with maximum comfort in the
Automatic mode during cold start-ups, the
blower fan will remain on low until the
engine warms up. The blower will increase in
speed and transition into Auto mode.
Manual Operation Override
This system offers a full complement of
manual override features. The AUTO symbol
in the front ATC display will be turned off
when the system is being used in the manual
mode.
Operating Tips
Summer Operation
The engine cooling system must be
protected with a high-quality antifreeze
coolant to provide proper corrosion protec -
tion and to protect against engine over -
heating. OAT coolant (conforming to
MS.90032) is recommended.
Winter Operation
To ensure the best possible heater and
defroster performance, make sure the engine
cooling system is functioning properly and
the proper amount, type, and concentration
of coolant is used. Use of the Air Recircula -
tion mode during Winter months is not
recommended, because it may cause window
fogging.
Vacation/Storage
Before you store your vehicle, or keep it out
of service (i.e., vacation) for two weeks or
more, run the air conditioning system at idle
for about five minutes, in fresh air with the
blower setting on high. This will ensure
adequate system lubrication to minimize the
possibility of compressor damage when the
system is started again.
Window Fogging
Vehicle windows tend to fog on the inside in
mild, rainy, and/or humid weather. To clear
the windows, select Defrost or Mix mode and
increase the front blower speed. Do not use
the Recirculation mode without A/C for long
periods, as fogging may occur.
Outside Air Intake
Make sure the air intake, located directly in
front of the windshield, is free of obstruc -
tions, such as leaves. Leaves collected in the
air intake may reduce airflow, and if they
enter the plenum, they could plug the water
drains. In Winter months, make sure the air
intake is clear of ice, slush, and snow.
CAUTION!
Failure to follow these cautions can cause
damage to the heating elements:
Use care when washing the inside of the
rear window. Do not use abrasive window
cleaners on the interior surface of the
window. Use a soft cloth and a mild
washing solution, wiping parallel to the
heating elements. Labels can be peeled
off after soaking with warm water.
Do not use scrapers, sharp instruments,
or abrasive window cleaners on the inte-
rior surface of the window.
Keep all objects a safe distance from the
window.
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185
F09– –Spare
F10 –15 Amp Blue Key Ignition Node (KIN)/Radio Frequency Hub (RF HUB)/
Electric Steering Column Lock (ESCL)
(*)
F11 –10 Amp Red UCI Port (USB & AUX)
F12 –25 Amp Clear HIFI Amplifier
F13 – –Spare
F14 – –Spare
F15 –15 Amp Blue Instrument Panel Cluster (IPC)/Switch Bank-Heavy Duty
Electrical Pkg (SWITCH BANK-HD ELEC)
(*)
F16 – –
Spare
F17 – –Spare
F18 –10 Amp Red Air Conditioning Clutch (AC CLUTCH)
(*)
F19 – –Spare
F20 30 Amp Pink –Central Body Controller (CBC) 1-INTERIOR LIGHTS
F21 –20 Amp Yellow REAR WIPER
F22 –10 Amp Red Engine Control Module (ECM)/Powertrain Control Module
(PCM)/Motor Generator Unit (MGU) WAKE UP/Power Pack
Unit (PPU) WAKE UP
(*)
F23 –10 Amp Red Powertrain Control Module (PCM)/Engine Control Module
(ECM)
(*)
CavityCartridge Fuse Micro Fuse Description
2020_JEEP_JL_WRANGLER_UG_RHD_UK.book Page 185

IN CASE OF EMERGENCY
186
F24– –Spare
F25 –10 Amp Red Module Shift By Wire (MOD_SBW)
(*)
F26 40 Amp Green –Central Body Controller (CBC) 2-EXTERIOR LIGHTS #1
F27 30 Amp Pink –
Front Wipers
F28 40 Amp Green –Central Body Controller (CBC) 3-POWER LOCKS
F29 40 Amp Green –Central Body Controller (CBC) 4-EXTERIOR LIGHTS #2
F30 – –Spare
F31 –10 Amp Red DIAGNOSTIC PORT
(*)
F32 –10 Amp Red Heating Ventilation Air Conditioning Mod (HVAC CTRL MOD)/
Steering Column Lock (SCL)/Occupant Classification Module
(OCM)/Driver Presence Detection Module (DPDM)
(*)
F33 –10 Amp Red ParkTronics System (PTS)/Infrared Camera Module (IRCM)/
Airbag Disable Lamps (AIRBAG DISABLE LMPS)
(*)
F34 –10 Amp Red Electronic Stability Control (ESC)/Electric Hydraulic Power
Steering (EHPS)/Smart Bar Control Module (SBCM) WAKE
UP
(*)
F35 30 Amp Pink –BRAKE VAC PMP — If Equipped
(*)
F36 30 Amp Pink –TRAILER TOW MOD — If Equipped
F37 30 Amp Pink –TRAILER TOW CONN 7W — If Equipped
Cavity Cartridge Fuse Micro Fuse Description
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191
F96–10 Amp Red PWR MIRROR SW
F97 –20 Amp Yellow RADIO/TBM
F98 –10 Amp Red SW BANK-HD ELEC/OFF ROAD
(*)
F99 – –Spare
F100 30 Amp Pink –ESC-ECU & VALVES
(*)
F101 30 Amp Pink –DriveTrain Control Module (DTCM)
(*)
F102 –15 Amp Blue DUAL USB PORT
F103 –15 Amp Blue HD ACCY #3 — If Equipped
(*)
F104 –15 Amp Blue PPU COOL PUMP — If Equipped
(*)
F105 –10 Amp Red Integrated Center Stack (ICS)/Heat Ventilation Air
Conditioning (HVAC)
(*)
F106 40 Amp Green –Electronic Speed Control (ESC)-PUMP MTR
(*)
F107 –20 Amp Yellow TRAILER TOW STOP/TURN LT — If Equipped
F108 –15 Amp Blue HD ACCY #4 — If Equipped
(*)
CavityCartridge Fuse Micro Fuse Description
2020_JEEP_JL_WRANGLER_UG_RHD_UK.book Page 191

SERVICING AND MAINTENANCE
214
Inspect the transfer case
fluid.X
X X
Inspect the CV/Universal
joints. X X X X X X X X X X X X X X X X X X X X
Change brake fluid every
24 months if using DOT
4 brake fluid. ** X X X X X X X X X X
Adjust parking brake on
vehicles equipped with
four-wheel disc brakes. X
X X XX
Replace engine air
cleaner filter. X
X X XX
Replace air
conditioning/cabin air
filter. X
X X XXX
Replace spark plugs
(2.0L Engine) *** X
X XX
Replace spark plugs
(3.6L Engine) *** X
X
Mileage or time passed
(whichever comes first)
7,500
15,000
22,500
30,000
37,500
45,000
52,500
60,000
67,500
75,000
82,500
90,000
97,500
105,000
112,500
120,000
127,500
135,000
142,500
150,000
Or Months: 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180 192 204 216 228 240
Or Kilometers:
12,000
24,000
36,000
48,000
60,000
72,000
84,000
96,000
108,000
120,000
132,000
144,000
156,000
168,000
180,000
192,000
204,000
216,000
228,000
240,000
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219
Additional Maintenance
Replace engine air cleaner filter.X X X X X X X
Replace air conditioning/cabin air filter. X X X X X X X
Change brake fluid every 24 months if using DOT 4
brake fluid. (**) X X X X X X X
Replace the engine fuel filter. X X X X X X X
Inspect accessory drive and timing belt. XX X
Replace accessory drive belt. (***) XX
Flush and replace the engine coolant at 10 years or
150,000 miles (240,000 km) whichever comes first. X X
Replace timing drive belt. (***) XX
Mileage or time passed (whichever comes first)
12,500
25,000
37,500
50,000
62,500
75,000
87,500
100,000
112,500
125,000
137,500
150,000
162,500
175,000
187,500
Or Years: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
200,000
220,000
240,000
260,000
280,000
300,000
2020_JEEP_JL_WRANGLER_UG_RHD_UK.book Page 219

SERVICING AND MAINTENANCE
242
If you are storing your vehicle for more than
21 days, we recommend that you take the
following steps to minimize the drain on your
vehicle's battery:
Disconnect the negative cable from
battery.
If your vehicle is equipped with Stop/Start
system then disconnect both the main and
supplemental negative battery cables.
Any time you store your vehicle or keep it
out of service (i.e., vacation) for two weeks
or more, run the air conditioning system at
idle for about five minutes in the fresh air
and high blower setting. This will ensure
adequate system lubrication to minimize
the possibility of compressor damage
when the system is started again.
If assistance is needed to disconnect the
battery system, see your authorized dealer.Battery Cable Disconnect
NOTE:
You must isolate the supplemental battery
connection point, as well as the main
battery terminal from the post, as shown in
the image, to fully de-energize both
batteries for storage. If assistance is
needed to disconnect the battery system,
see an authorized dealer.
Do not disconnect the Intelligent Battery
Sensor (IBS), or your Stop/Start system
may not function for up to 24 hours, due
to the IBS being set into learn mode.
BODYWORK
Body And Underbody Maintenance
Cleaning Headlights
Your vehicle is equipped with plastic head -
lights and fog lights that are lighter and less
susceptible to stone breakage than glass
headlights.
Plastic is not as scratch resistant as glass
and therefore different lens cleaning proce -
dures must be followed.
To minimize the possibility of scratching the
lenses and reducing light output, avoid
wiping with a dry cloth. To remove road dirt,
wash with a mild soap solution followed by
rinsing.
Do not use abrasive cleaning components,
solvents, steel wool or other aggressive mate -
rial to clean the lenses.
CAUTION!
If the negative battery cables are not
isolated properly it can cause a potential
power spike or surge in the system,
resulting in damage to essential electrical
components.
1 — Supplemental Negative Battery Cable
2 — Main Negative Battery Cable
3 — Intelligent Battery Sensor (IBS)
4 — Main Negative Battery Terminal
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