check engine light JEEP COMMANDER 2010 1.G User Guide

“4WD LOW” indicator light in the instrument cluster
will flash and go out when the shift is complete. Release
the T-handle.
NOTE:
•If shift conditions/interlocks are not met, or a transfer
case motor temperature protection condition exists, a
“CHECK SHIFT PROCEDURES” message will flash
from the Electronic Vehicle Information Center (EVIC).
Refer to “Electronic Vehicle Information Center
(EVIC)” in Section 4 of this manual.
•Shifting into or out of 4WD LOW is possible with the
vehicle completely stopped; however, difficulty may
occur due to the mating clutch teeth not being prop-
erly aligned. Several attempts may be required for
clutch teeth alignment and shift completion to occur.
The preferred method is with the vehicle rolling 0 to3 mph (0 to 5 km/h). If the vehicle is moving faster
than 3 mph (5 km/h), the transfer case will not allow
the shift.
NEUTRAL Shift Procedure
1. Key ON, engine off.
2. Vehicle stopped, with foot on brake.
3. Place the transmission into NEUTRAL.
4. Hold down the NEUTRAL “pin” switch (with a pen,
etc.) for four seconds until the LED light by the switch
starts to blink indicating shift in progress. The light will
stop blinking (stay on solid) when the NEUTRAL shift is
complete. A “4WD SYSTEM IN NEUTRAL” message will
display on the Electronic Vehicle Information Center
(EVIC). Refer to “Electronic Vehicle Information Center
(EVIC)” in Section 4 of this manual.
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STARTING AND OPERATING 259

apparent, and/or the system is not functioning as antici-
pated. Coordinate inspection efforts through an autho-
rized dealer.
WARNING!
Fluid level should be checked on a level surface and
with the engine off to prevent injury from moving
parts and to ensure accurate fluid level reading. Do
not overfill. Use only manufacturers recommended
power steering fluid.
If necessary, add fluid to restore to the proper indicated
level. With a clean cloth, wipe any spilled fluid from all
surfaces.
PARKING BRAKE
To set the parking brake, pull the lever up as firmly as
possible. When the parking brake is applied with the
ignition ON, the “Brake Warning Light” in the instru-
ment cluster will illuminate. To release the parking brake,
pull up slightly, press the center button, then lower the
lever completely.
NOTE: The “Brake Warning Light” indicates only that
the parking brake is applied. It does not indicate the
degree of brake application.
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STARTING AND OPERATING 267

Towing Tips
Before setting out on a trip, practice turning, stopping
and backing the trailer in an area away from heavy
traffic.
Automatic Transmission
The DRIVE range can be selected when towing. How-
ever, if frequent shifting occurs while in this range, the
TOW/HAUL mode (if equipped) or a lower gear range
should be selected.
NOTE:Using the TOW/HAUL mode (if equipped) or a
lower gear range while operating the vehicle under
heavy operating conditions, will improve performance
and extend transmission life by reducing excessive shift-
ing and heat buildup. This action will also provide better
engine braking. The transmission fluid and filter should be changed if
you REGULARLY tow a trailer for more than 45 minutes
of continuous operation. Refer to the “Maintenance
Schedule” in Section 8 for the proper maintenance inter-
vals.
NOTE:
Check the transmission fluid level before towing
(5.7L engine).
Electronic Speed Control — If Equipped

Do not use in hilly terrain or with heavy loads.
When using the speed control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
Use speed control in flat terrain and with light loads to
maximize fuel efficiency.
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STARTING AND OPERATING 335

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

Operation of the wipers on dry glass for long periods
may cause deterioration of the wiper blades. Always use
washer fluid when using the wipers to remove salt or dirt
from a dry windshield.
Avoid using the wiper blades to wipe frost or ice from the
windshield. Keep the blade rubber out of contact with
petroleum products such as engine oil, gasoline, etc.
NOTE:Life expectancy of wiper blades varies depend-
ing on geographical area and frequency of use. Poor
performance of blades may be present with chattering,
marks, water lines or wet spots. If any condition is
present please proceed to clean wiper blades with humid
cloth removing any debris that may be affecting its
function.
Adding Washer Fluid
On vehicles equipped with a Electronic Vehicle Informa-
tion Center (EVIC), the low washer fluid level will be
indicated. When the sensor detects a low fluid level, the windshield will light on the vehicle graphic outline and
the “WASHER FLUID LOW” message will be displayed.
The fluid reservoir for the windshield washers and the
rear window washer is shared. The fluid reservoir is
located in the engine compartment, be sure to check the
fluid level at regular intervals. Fill the reservoir with
windshield washer solvent only (not radiator antifreeze).
When refilling the washer fluid reservoir, take some
washer fluid and apply it to a cloth or towel and wipe
clean the wiper blades, this will help blade performance.
To prevent freeze-up of your windshield washer system
in cold weather, select a solution or mixture that meets or
exceeds the temperature range of your climate. This
rating information can be found on most washer fluid
containers.
370 MAINTAINING YOUR VEHICLE

•Change your engine oil more often if you drive your
vehicle off-road for an extended period of time.
•Under no circumstances should oil change intervals
exceed 6,000 miles (10,000 km) or 6 months, whichever
comes first.
Your authorized dealer will reset the oil change indicator
message after completing the scheduled oil change. If this
scheduled oil change is performed by someone other
than your authorized dealer the message can be reset by
referring to the steps described under ”Electronic Vehicle
Information Center” in Section 4 of this manual.
At Each Stop for Fuel
•Check the engine oil level about five minutes after a
fully warmed engine is shut off. Checking the oil level
while the vehicle is on level ground will improve the
accuracy of the oil level reading. Add oil only when
the level is at or below the ADD or MIN mark.
•Check the windshield washer solvent and add if
required.
Once a Month
•Check tire pressure and look for unusual wear or
damage.
•Inspect the battery and clean and tighten the terminals
as required.
•Check the fluid levels of coolant reservoir, brake
master cylinder, power steering and transmission
(5.7L engine) and add as needed.
•Check all lights and other electrical items for correct
operation.
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SMAINTENANCE SCHEDULES 413

ABS (Anti-Lock Brake System).............. 269
Adding Fuel ........................... 318
Adjustable Pedals ........................ 117
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 366
Air Conditioner Maintenance ............... 368
Air Conditioning ........................ 226
Air Conditioning, Operating Tips ............ 235
Air Conditioning, Rear Zone ................ 233
Air Conditioning Refrigerant ............... 369
Air Conditioning System .................. 226
Air Filter .............................. 366
Air Pressure, Tires ....................... 295
Airbag .............................. 49,57
Airbag Deployment ....................... 58
Airbag Light ................... 50,56,61,75,163
Airbag Maintenance ....................... 60
Airbag, Side .......................... 55,57
Airbag, Window (Side Curtain) ...........51,55,57
Alarm, Panic ............................ 24 Alarm (Security Alarm)
.................19,163
Alterations/Modifications, Vehicle ............. 9
Antenna, Satellite Radio ................... 216
Antifreeze (Engine Coolant) ................ 407
Anti-Lock Brake System (ABS) ............269,272
Anti-Lock Warning Light .................. 163
Anti-Theft System ....................... 163
Appearance Care ........................ 387
Arming Theft System (Security Alarm) ......... 19
Assist, Hill Start ........................ 280
Auto Down Power Windows ................ 31
Automatic Dimming Mirror ................. 82
Automatic Door Locks ..................... 29
Automatic Headlights .................... 105
Automatic Temperature Control (ATC) ......... 226
Automatic Transmission ................248,383
Adding Fluid ......................... 385
Fluid and Filter Changes ................. 383
Fluid Level Check ................... 384,385
442 INDEX

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

Exhaust Gas Caution..............38,74,317,371
Exhaust System ....................... 74,371
Extender, Seat Belt ........................ 48
Exterior Finish Care ...................... 387
Exterior Lights .......................... 76
Filters Air Cleaner .......................... 366
Engine Oil ........................... 366
Engine Oil Disposal .................... 365
Finish Care ............................ 387
Flashers .............................. 342
Hazard Warning ....................... 342
Turn Signal ................... 76,161,402,404
Flipper Glass, Liftgate ..................... 34
Flooded Engine Starting ................... 244
Fluid Capacities ......................... 407
Fluid Leaks ............................. 76
Fluid Level Checks Automatic Transmission ............383,384,385Brake
.............................. 380
Engine Oil ........................... 363
Power Steering ........................ 266
Fluids, Lubricants and Genuine Parts .......... 408
Fog Light Service ........................ 403
Fog Lights ....................... 108,169,403
Fold and Tumble Rear Seat .................. 93
Folding Rear Seat ...................... 93,97
Four Wheel Drive ....................... 256
Operation ........................... 256
Systems ............................. 256
Four Wheel Drive Operation ................ 256
Four-Way Hazard Flasher .................. 342
Freeing A Stuck Vehicle ................... 255
Front Axle (Differential) ................... 381
Front Heated Seats ....................... 90
Fuel ................................. 314
Conserving .......................... 176
Filler Cap (Gas Cap) .................... 318
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INDEX 447