2008 JEEP COMMANDER ECU

WARNING!
Raising the vehicle higher than necessary can make
the vehicle less stable. It could slip off the jack and
hurt someone near it. Raise the vehicle only enough
to remove the tire.
6. Remove the lug nuts and wheel.
7. Position the spare wheel/tire on the vehicle and install
the lug nuts with the cone-shaped end toward the wheel.
Lightly tighten the nuts. To avoid the risk of forcing the
vehicle off the jack, do not tighten the nuts fully until the
vehicle has been lowered.
8. Lower the vehicle by turning the jack screw counter
clockwise, and remove the jack and wheel blocks.9. Finish tightening the lug nuts. Push down on the
wrench while tightening for increased leverage. Alternate
nuts until each nut has been tightened twice. Correct
wheel nut tightness is 130 N´m (95 ft. lbs). If in doubt
about the correct tightness, have them checked with a
torque wrench by your authorized dealer or at a service
station.
10. Lower the jack to it's fully closed position.
WARNING!
A loose tire or jack, thrown forward in a collision or
hard stop could endanger the occupants of the ve-
hicle. Always stow the jack parts and the spare tire in
the places provided.
11. Secure the tire, jack, and tools in their proper loca-
tions.
WHAT TO DO IN EMERGENCIES 373
6

Pay particular attention to the hoses nearest to high heat
sources such as the exhaust manifold. Inspect hose rout-
ing to be sure hoses do not touch any heat source or
moving component that may cause heat damage or
mechanical wear.
Insure nylon tubing in these areas has not melted or
collapsed. Inspect all hose connections such as clamps
and couplings to make sure they are secure and no leaks
are present. Components should be replaced immedi-
ately if there is any evidence of degradation that could
cause failure.
Fuel System Connections
Electronic Fuel Injection high pressure fuel systems are
designed with tubes and special connects, connections
and clamps which have unique material characteristics to
provide adequate sealing and resist attack by deterio-
rated gasoline.You are urged to use only the manufactures-specified
tubes, connections and clamps, or their equivalent in
material and specification, in any fuel system servicing.
Brake System
In order to assure brake system performance, all brake
system components should be inspected periodically.
Refer to the Maintenance Schedule in Section 8 for
suggested service intervals.
WARNING!
Riding the brakes can lead to brake failure and
possibly an accident. 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 wouldn't have your full
braking capacity in an emergency.
MAINTAINING YOUR VEHICLE 407
7

Brake and Power Steering System Hoses
When servicing the vehicle for scheduled maintenance,
inspect surface of hoses for evidence of heat and me-
chanical damage. Hard and brittle rubber, cracking, tears,
cuts, abrasion, and excessive swelling suggest deteriora-
tion of the rubber. Particular attention should be made to
examining those hose surfaces nearest to high heat
sources, such as the exhaust manifold.
Inspect all hose clamps and couplings to make sure they
are secure and no leaks are present.
NOTE:Often fluids such as oil, power steering fluid,
and brake fluid are used during assembly plant opera-
tions to ease the assembly of hoses to couplings. There-
fore, oil wetness at the hose-coupling area is not neces-
sarily an indication of leakage. Actual dripping of hot
fluid when systems are under pressure (during vehicle
operation) should be noted before hose is replaced based
on leakage.NOTE:Inspection of brake hoses should be done when-
ever the brake system is serviced and every engine oil
change.
WARNING!
Worn brake hoses can burst and cause brake failure.
You could have an accident. If you see any signs of
cracking, scuffing, or worn spots, have the brake
hoses replaced immediately.
Brake Master Cylinder Ð Brake Fluid Level Check
The fluid level in the master cylinder should be checked
when performing under hood services, or immediately if
the brake system warning lamp shows system failure
Be sure to clean the top of the master cylinder area before
removing the cap. If necessary, add fluid to bring the
fluid level up to the requirements described on the brake
408 MAINTAINING YOUR VEHICLE

3. Reach through the access hole to access the back of the
front fog light housing on the back of the front fascia.
4. Disconnect the electrical connector.
5. Turn the socket on the back of the housing 1/4 turn
counter clockwise to unlock it.
6. Pull the socket and bulb straight out from the opening
in the housing.
7. Pull the base of the bulb straight out of the socket.
CAUTION!
Do not touch the new bulb with your fingers. Oil
contamination will severely shorten bulb life. If the
bulb comes in contact with any oily surface, clean the
bulb with rubbing alcohol.
Rear Tail, Stop, Turn Signal, and Back-Up Lights
1. Raise the liftgate.
2. Remove the two push-pins that secure the rear lamp
unit to the side of the liftgate opening.
432 MAINTAINING YOUR VEHICLE

7. Pull the base of the bulb straight out of the socket.
CAUTION!
Do not touch the new bulb with your fingers. Oil
contamination will severely shorten bulb life. If the
bulb comes in contact with any oily surface, clean the
bulb with rubbing alcohol.
Center High Mounted Stop Light (CHMSL)
1. Remove the two screws securing the CHMSL.
2. Twist the bulb socket to remove from the CHMSL
housing.
3. Pull the bulb out of the socket.
4. Replace the bulb, reinstall the socket and reattach the
CHMSL.
434 MAINTAINING YOUR VEHICLE

ABS (Anti-Lock Brake System)............188,302
Adding Fuel........................... 341
Adding Washer Fluid..................... 177
Adjustable Pedals....................... 135
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 393
Air Conditioner Maintenance............... 397
Air Conditioning........................ 259
Air Conditioning, Operating Tips............ 269
Air Conditioning, Rear Zone................ 267
Air Conditioning Refrigerant............... 398
Air Conditioning System.................. 259
Air Filter.............................. 393
Air Pressure, Tires....................... 316
Airbag................................ 48
Airbag Deployment....................... 55
Airbag Light.......................57,71,188
Airbag Maintenance....................... 57
Alarm, Panic............................ 24
Alarm (Security Alarm).................20,189Alarm System (Security Alarm)............... 20
Alignment and Balance................... 321
Alterations/Modifications, Vehicle............. 9
Antenna, Satellite Radio................... 250
Antifreeze (Engine Coolant)................ 435
Disposal............................ 405
Anti-Lock Brake System (ABS)............139,302
Anti-Lock Warning Light.................. 188
Anti-Theft System.....................20,189
Appearance Care........................ 415
Assist, Hill Start........................ 148
Audio Systems (Radio).................... 239
Auto Down Power Windows................ 32
Automatic Dimming Mirror................. 78
Automatic Door Locks..................... 29
Automatic Headlights.................... 126
Automatic Temperature Control (ATC)......... 260
Automatic Transmission................283,411
Adding Fluid......................... 412
458 INDEX

Battery Saver......................... 125
Brake Assist Warning.................152,193
Brake Warning........................ 187
Bulb Replacement...................... 428
Center Mounted Stop................... 434
Courtesy/Reading..................... 130
Cruise.............................. 193
Daytime Running...................... 128
Dimmer Switch, Headlight.............124,129
Electronic Stability Program (ESP)
Indicator........................152,189,193
Electronic Throttle Control Warning......... 194
Fog ..........................128,194,431
Four-Wheel Drive Indicator............... 193
Fuses............................... 419
Hazard Warning Flasher................. 366
Headlight Switch...................... 125
Headlights........................... 428
Headlights On With Wipers............... 126High Beam Indicator.................... 187
Illuminated Entry....................... 21
Instrument Cluster..................125,127
Interior..........................127,130
Lights On Reminder.................... 128
Low Fuel............................ 195
LowTire ............................ 190
Malfunction Indicator (Check Engine)........ 187
Oil Pressure.......................... 189
Passing............................. 129
Reading............................. 130
Rear Servicing........................ 432
Rear Tail............................ 432
Seat Belt Reminder..................... 193
Security Alarm (Theft Alarm).............. 189
Service.............................. 428
Service Engine Soon (Malfunction Indicator) . . . 187
Side Marker.......................... 432
SmartBeams.......................... 126
INDEX 467
10

Rear Folding....................... 113,117
Reclining............................ 108
Seatback Release....................... 117
Security Alarm (Theft Alarm).............20,189
Selection of Oil......................... 390
Sentry Key (Immobilizer)................... 17
Sentry Key Programming................... 19
Sentry Key Replacement................... 18
Service Assistance....................... 448
Service Contract......................... 450
Service Engine Soon Light (Malfunction
Indicator)............................. 187
Service Manuals........................ 452
Setting the Clock................213,229,240,243
Settings, Personal........................ 205
Shift Lock Manual Override................ 281
Shifting............................... 281
Automatic Transmission................. 281
Shoulder Belts........................... 39Signals, Turn...................129,187,430,432
Skylights, Command View................. 168
SmartBeams........................... 126
Snow Chains (Tire Chains)................. 322
Snow Plow............................ 363
Sound Systems (Radio).................... 239
Spare Tire............................. 369
Spark Plug Wires (Ignition Cables/Wires)...... 392
Spark Plugs............................ 392
Specifications
Fuel (Gasoline)........................ 333
Oil ................................ 390
Speed Control (Cruise Control).............. 136
Speedometer........................... 187
Starting............................... 277
Automatic Transmission................. 277
Cold Weather......................278,280
Engine Block Heater.................... 280
Engine Fails to Start.................... 279
INDEX 473
10