2010 JEEP COMMANDER fuel cap

ONBOARD DIAGNOSTIC SYSTEM – OBD II
Your vehicle is equipped with a sophisticated onboard
diagnostic system called OBD II. This system monitors
the performance of the emissions, engine, and automatic
transmission control systems. When these systems are
operating properly, your vehicle will provide excellent
performance and fuel economy, as well as engine emis-
sions well within current government regulations.
If any of these systems require service, the OBD II system
will turn on the “Malfunction Indicator Light” (MIL). It
will also store diagnostic codes and other information to
assist your service technician in making repairs. Al-
though your vehicle will usually be drivable and not
need towing, see your authorized dealer for service as
soon as possible.CAUTION!
•Prolonged driving with the MIL on could cause
further damage to the emission control system. It
could also affect fuel economy and drivability. The
vehicle must be serviced before any emissions
tests can be performed.
•If the MIL is flashing while the engine is running,
severe catalytic converter damage and power loss
will soon occur. Immediate service is required.
Loose Fuel Filler Cap Message
After fuel is added, the vehicle diagnostic system can
determine if the fuel filler cap is loose, improperly
installed, or damaged. A “CHECK GASCAP” message
will be displayed in the EVIC (Refer to Section 4 of this
manual). Tighten the gas cap until aclickingsound is
heard. This is an indication that the gas cap is properly
tightened.
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MAINTAINING YOUR VEHICLE 359

The message will remain displayed until the vehicle
diagnostic system can retest the fuel system. The test will
perform the next time the vehicle is started, if the vehicle
was keyed off above 40°F (4°C) outside temperature and
the following vehicle start is above 40°F (4°C) outside
temperature. It may be possible to have a message that
will not clear due to the test being disabled due to low
outside temperatures. If the test is performed and the
problem is gone, the message will disappear.
If the problem persists, the message will appear the next
time the vehicle is started. This might indicate a damaged
cap. If the problem is detected twice in a row, the system
will turn on the MIL. Resolving the problem will turn the
MIL off. See your authorized dealer for service.
EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS
In some localities, it may be a legal requirement to pass
an inspection of your vehicle’s emissions control system.Failure to pass could prevent vehicle registration.
For states that require an Inspection and Mainte-
nance (I/M), this check verifies the “Malfunction
Indicator Light (MIL)” is functioning and is not
on when the engine is running, and that the OBD II
system is ready for testing.
Normally, the OBD II system will be ready. The OBD II
system may notbe ready if your vehicle was recently
serviced, recently had a dead battery or a battery replace-
ment. If the OBD II system should be determined not
ready for the I/M test, your vehicle may fail the test.
Your vehicle has a simple ignition key-actuated test,
which you can use prior to going to the test station. To
check if your vehicle’s OBD II system is ready, you must
do the following:
1. Insert your ignition key into the ignition switch.
360 MAINTAINING YOUR VEHICLE

Engine Oil Viscosity
SAE 5W-20 engine oil is recommended for all operating
temperatures. This engine oil improves low temperature
starting and vehicle fuel economy.
The engine oil filler cap also shows the recommended
engine oil viscosity for your vehicle. For information on
engine oil filler cap location, refer to “Engine Compart-
ment” in this section.
NOTE:Vehicles equipped with a 5.7L engine must use
SAE 5W-20 oil. Failure to do so may result in improper
operation of the Multiple Displacement System (MDS).
Refer to “Multi-Displacement System” in Section 5 for
more details.
Lubricants, which do not have both the engine oil certi-
fication mark and the correct SAE viscosity grade num-
ber, should not be used.
Synthetic Engine Oils
You may use synthetic engine oils if the recommended oil
quality requirements are met, and the recommended
maintenance intervals for oil and filter changes are
followed.
Materials Added to Engine Oils
The manufacturer strongly recommends against the ad-
dition of any additives (other than leak detection dyes) to
the engine oil. Engine oil is an engineered product and its
performance may be impaired by supplemental
additives.
Disposing of Used Engine Oil and Oil Filters
Care should be taken in disposing of used engine oil and
oil filters from your vehicle. Used oil and oil filters,
indiscriminately discarded, can present a problem to the7
MAINTAINING YOUR VEHICLE 365

CAUTION!
Be aware that if the fluid temperature is below 50°F
(10°C) it may not register on the dipstick. Do not add
fluid until the temperature is elevated enough to
produce an accurate reading.
7. Check for leaks. Release parking brake.
To prevent dirt and water from entering the transmission
after checking or replenishing fluid, make certain that the
dipstick cap is properly reseated. It is normal for the
dipstick cap to spring back slightly from its fully seated
position, as long as its seal remains engaged in the
dipstick tube.
Maintenance After Off-Road Driving
After extended operation in mud, sand or water, or
similar dirty conditions, have your brake discs, brake
linings, and axle joints inspected and cleaned as soon as possible. This will prevent any abrasive material from
causing excessive wear or unpredictable braking action.
After driving off-road, completely inspect the underbody
of your vehicle. Check the tires, body structure, steering,
suspension and exhaust system for damage. Check
threaded fasteners for looseness, particularly on the
chassis, drivetrain components, steering and suspension.
Retighten, if required, to torque values specified in the
Service Manual. Also check for accumulations of vegeta-
tion or brush that could become a fire hazard, or conceal
damage to fuel lines, brake hoses, axle pinion seals, and
propeller shafts.
386 MAINTAINING YOUR VEHICLE

FLUIDS AND CAPACITIES
U.S.Metric
Fuel (Approximate) 21 Gallons79 Liters
Engine Oil with Filter
3.7 Liter Engine (SAE 5W-20, API Certified) 5 Quarts4.7 Liters
5.7 Liter Engine (SAE 5W-20, API Certified) 7 Quarts6.6 Liters
Cooling System *
3.7L Engine (MOPAR Engine Coolant/Antifreeze 5
Year/100,000 Mile Formula or equivalent) — Without Rear
Heat 12.7 Quarts
11.8 Liters
3.7L Engine (MOPAR Engine Coolant/Antifreeze 5
Year/100,000 Mile Formula or equivalent) — With Rear Heat 14 Quarts
13.2 Liters
5.7 Liter Engine (MOPAR Engine Coolant/Antifreeze 5
Year/100,000 Mile Formula or equivalent) — Without Rear
Heat 15.2 Quarts
14.4 Liters
5.7 Liter Engine (MOPAR Engine Coolant/Antifreeze 5
Year/100,000 Mile Formula or equivalent) — With Rear Heat 16.7 Quarts
15.8 Liters
* Includes heater and coolant recovery bottle filled to MAX level.
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MAINTAINING YOUR VEHICLE 407

FLUIDS, LUBRICANTS, AND GENUINE PARTS
Engine
ComponentFluid, Lubricant, or Genuine Part
Engine Coolant MOPARAntifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hy-
brid Organic Additive Technology) or equivalent.
Engine Oil Use API Certified SAE 5W-20 Engine Oil, meeting the requirements of
Chrysler Material Standard MS-6395. Refer to your engine oil filler cap for
correct SAE grade.
Engine Oil Filter MOPAREngine Oil Filter or equivalent.
Spark Plugs (3.7L Engine) ZFR6F-11G (Gap 0.043 in [1.09 mm])
Spark Plugs (5.7L Engine) LZFR5C–11 (Gap 0.043 in [1.09 mm])
Fuel Selection (3.7L Engine) 87 Octane
Fuel Selection (5.7L Engine) 87 Octane Acceptable - 89 Octane Recommended
408 MAINTAINING YOUR VEHICLE

Fluid Type........................... 383
Special Additives ...................... 383
Torque Converter ...................... 254
Autostick ............................. 250
Auxiliary Electrical Outlet (Power Outlet) ...... 140
Auxiliary Power Outlet ................... 140
Battery ............................... 367
Emergency Starting ..................... 351
Keyless Transmitter Replacement (RKE) ....... 24
Saving Feature (Protection) ............... 110
Belts, Seat ............................ 40,75
Body Mechanism Lubrication ............... 369
B-Pillar Location ........................ 290
Brake Assist System ...................... 273
Brake Control System, Electronic ............. 272
Brake Fluid ............................ 380
Brake System ........................... 379
Anti-Lock (ABS) .................... 269,272
Fluid Check .......................... 380 Master Cylinder
....................... 380
Parking ............................. 267
Warning Light ........................ 160
Brake/Transmission Interlock ............... 247
Break-In Recommendations, New Vehicle ........ 73
Bulb Replacement ..................... 400,401
Bulbs, Light ............................ 76
Calibration, Compass ..................... 179
Camera, Rear ........................... 128
Capacities, Fluid ........................ 407
Caps, Filler Fuel ............................... 318
Power Steering ........................ 266
Radiator (Coolant Pressure) ............... 377
Car Washes ............................ 387
Carbon Monoxide Warning ...............74,317
Cargo Area Features ...................... 147
Cargo Compartment ...................... 147
Luggage Carrier ....................... 150
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INDEX 443

Cargo Load Floor........................ 147
Cargo (Vehicle Loading) ................... 320
Cellular Phone ........................ 85,223
Center High Mounted Stop Light ............ 406
Certification Label ....................... 320
Chains, Tire ............................ 301
Changing A Flat Tire ..................... 343
Chart, Tire Sizing ........................ 287
Check Engine Light (Malfunction Indicator Light) . 360
Checking Your Vehicle For Safety ............. 73
Checks, Safety ........................... 73
Child Restraint .................... 63,64,69,71
Child Restraint Tether Anchors .............68,69
Child Safety Locks ........................ 30
Climate Control ......................... 223
Clock ........................... 186,190,199
Cold Weather Operation ................... 244
Command View Skylights .................. 139
Compact Disc (CD) Maintenance ............. 222Compact Spare Tire
...................... 297
Compass .............................. 179
Compass Calibration ..................... 179
Compass Variance ....................... 180
Computer, Trip/Travel .................... 176
Connector UCI ................................ 209
Universal Consumer Interface (UCI) ......... 209
Conserving Fuel ........................ 176
Console, Overhead ....................... 130
Contract, Service ........................ 435
Cooling System ......................... 374
Adding Coolant (Antifreeze) .............. 376
Coolant Capacity ...................... 407
Coolant Level ......................... 378
Disposal of Used Coolant ................ 377
Drain, Flush, and Refill .................. 375
Inspection ........................... 374
Points to Remember .................... 378
444 INDEX