engine JEEP LIBERTY 2005 KJ / 1.G Owner's Guide

Turbocharger “Cool Down”
NOTE:Letting the engine idle after extended operation
allows the turbine housing to cool to normal operating
temperature.
The following chart should be used as a guide in deter-
mining the amount of engine idle time required tosufficiently cool down the turbocharger before shut
down, depending upon the type of driving and the
amount of cargo.
TURBOCHARGERCOOL DOWNCHART
Driving Conditions Load Turbocharger Temperature Idle Time (in minutes)
Before Shut Down
Stop & Go Empty Cool Less than 1
Stop & Go Medium Warm 1
Highway Speeds Medium Warm 2
City Traffic Max. GCWR Warm 3
Highway Speeds Max. GCWR Warm 4
Uphill Grade Max. GCWR Hot 5
224 STARTING AND OPERATING

Diesel Fuel-Water Separator
A diesel fuel-water separator separates the water nor-
mally found in diesel fuel. A manual hand prime pump is
located on the filter head for re-priming the fuel system.
The fuel-water separator is located on the driver side
cowl in the engine compartment. Refer to “2.8L Turbo
Diesel Engine Compartment” in Section 7 for location.
NOTE:If the “Water-In-Fuel Warning Light” (located in
the instrument cluster) comes on, this indicates that
water has collected in the fuel filter and should be
drained immediately. See your authorized dealer for
service.Should your vehicle run out of fuel, the fuel system must
be re-primed in order to start the engine. Factors such as
temperature, which affects the viscosity of the fuel, how
long the vehicle has been sitting and other factors will
influence how quickly the engine starts.
Re-Priming the Diesel Fuel System
The following procedure must be followed after com-
pletely running out of fuel.
1. Add a minimum of 2 gallons (7.57L) of diesel fuel to
the fuel tank.
2. Open the hood.
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3. Depress the fuel-water separator knob 20 consecutive
times.
4. Turn the ignition to START and crank the engine a
maximum of 10 seconds. If the engine does not start,
repeat Step 3.NOTE:The engine will typically start within 10 sec-
onds; the engine will idle then stall, purging air from the
fuel lines and filter.
5. Depress the fuel-water separator knob 20 consecutive
times.
6. Turn the ignition to START and crank the engine a
maximum of 10 seconds. The engine should start and
remain running.
NOTE:If the engine does not start, repeat the cycle as
many times as necessary.
ENGINE BLOCK HEATER — IF EQUIPPED
The engine block heater warms engine coolant and
permits quicker starts in cold weather. Connect the cord
to a standard 110-115 volt AC electrical outlet with a
grounded, three wire extension cord. The engine block
heater cord is found under the hood clipped to the heater
line on the left side of the engine (3.7L only).Hand Prime Pump
226 STARTING AND OPERATING

WARNING!
When parking your vehicle, always leave a manual
transmission in first gear and apply the parking
brake fully to guard against vehicle movement and
possible injury or damage. Never use any gear as a
substitute for the parking brake.
CAUTION!
To drive as safely as possible and to prolong the life
of your manual transmission, follow these tips:
•Before shifting from a forward gear into reverse, or
from reverse to a forward gear, stop vehicle com-
pletely. Otherwise, accelerated transmission wear may
result.
•Do not operate at sustained high engine or road
speeds in lower gears. Engine damage may result.
•Do not downshift into a low gear while traveling at too
high a speed for that gear. Engine, clutch, or transmis-
sion damage may result.
•Do not rest your foot on the clutch pedal. This causes
heat buildup and damages the clutch.
•When you slow down or go up a grade, downshift as
speed requires or the engine may overheat.
•Never hold the vehicle stopped on a hill by using the
clutch pedal. The clutch may be damaged.
•During cold weather, you may experience increased
effort in shifting until the transmission fluid warms
up. This is normal.
•Push in the clutch pedal completely when shifting.
Otherwise, transmission or clutch damage may result.
228 STARTING AND OPERATING

•When “rocking” a stuck vehicle by shifting between a
forward gear and reverse, do not spin wheels faster than
15 mph (24 km/h), or drivetrain damage may result.
Recommended Manual Transmission Shifting
Speeds
The manufacturer recommends that you use the shift
speeds listed in the chart below.
Manual Transmission Shift Speeds in MPH (KM/H)
En-
gineSpeeds 1 to 2 2 to 3 3 to 4 4 to 5 5 to 6
2.4L Accel. 14 (23)24
(39)34
(55)46
(74)57
(92)
Cruise 11 (18)19
(31)27
(43)38
(61)45
(72)
3.7L Accel. 15 (24) 24
(39)34
(55)47
(76)56
(90)
Cruise 10 (16) 19
(31)27
(43)37
(60)41
(66)
Clutch Interlocking Ignition System
2WD Models Only — Manual transmission vehicles are
equipped with a clutch interlock safety feature. The
clutch pedal must be fully depressed to allow cranking of
the engine.
4WD Models Only — The exception to this clutch inter-
lock is 4WD models equipped with a manual transmis-
sion. For these models, the clutch interlock feature is
overridden when the vehicle is operated in 4L to enhance
off-road capability. Refer to “Starting Procedures —
Manual Transmission (4WD Models Only)” in this sec-
tion.
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Automatic Transmission
Shifting from D (Drive) to P (Park) or R (Reverse) (or
from P or R to D) should be done only after the
accelerator pedal is released and the vehicle is stopped.
Be sure to keep your foot on the brake when moving the
shift lever between these gears.WARNING!
It is dangerous to shift the selector lever out of “P” or
“N” if the engine speed is higher than idle speed. If
your foot is not firmly on the brake pedal, the
vehicle could accelerate quickly forward or in re-
verse. You could lose control of the vehicle and hit
someone or something. Only shift into gear when
the engine is idling normally and when your right
foot is firmly on the brake pedal.
Brake Transmission Shift Interlock System
This vehicle is equipped with a brake transmission shift
interlock system (BTSI), which holds the gearshift lever
in the P (Park) position when the ignition switch is in the
OFF position. To move the gear selector lever out of the
P (Park) position, turn the ignition switch to the ON
position, and press the brake pedal and the button on the
front of the shifter handle.
Automatic Shift Controls
230 STARTING AND OPERATING

Gear Ranges
P (Park)
Supplements the parking brake by locking the transmis-
sion. The engine can be started in this range. Never use P
(Park) while the vehicle is in motion. Apply the parking
brake when leaving the vehicle in this range. Always
place the gear selector in the P (Park) position first, and
then apply the parking brake.
WARNING!
Unintended movement of a vehicle could injure
those in and near the vehicle. As with all vehicles,
you should never exit a vehicle while the engine is
running. Before exiting a vehicle, you should always
shift the vehicle into P (Park), remove the key from
the ignition, and apply the parking brake. Once the
key is removed from the ignition, the transmission
shift lever is locked in the P (Park) position, securing
the vehicle against unwanted movement. Further-
more, you should never leave children unattended
inside a vehicle.
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The following indicators should be used to ensure that
you have engaged the transmission shift lever into the P
(Park) position:
•When shifting into P (Park), depress the button on the
shift lever and firmly move the lever all the way
forward until it stops.
•Look at the shift indicator window on the console to
ensure it is in the P (Park) position.
•When engaged in P (Park), you will not be able to
move the shifter rearward without depressing the shift
lever button.
CAUTION!
Before moving the shift lever out of P (Park), you must
turn the ignition from LOCK to ON so the steering
wheel and shift lever are released. Otherwise, damage
to the steering column or shifter could result.
R (Reverse)
For moving the vehicle rearward. Always stop before
moving the lever to R (Reverse), except when rocking the
vehicle.
N (Neutral)
Engine may be started in this position.
NOTE:Towing the vehicle, coasting, or otherwise driv-
ing with the transmission in N (Neutral) can cause severe
damage to the transmission.
WARNING!
Do not coast in N (Neutral) and never turn off the
ignition to coast down a hill. These are unsafe
practices that limit your response to changing traffic
or road conditions. You might lose control of the
vehicle.
232 STARTING AND OPERATING

NOTE:If the vehicle is started in cold outside tempera-
tures, shifts into Overdrive may be delayed. Normal
Overdrive and shifting operation will resume when the
temperature of the transmission reaches the appropriate
temperature. Refer to the “Note” under “Torque Con-
verter Clutch” later in this section.
If the transmission temperature gets too hot, the trans-
mission may downshift out of Overdrive or engage
overdrive at higher vehicle speeds until the transmission
cools down. After cooldown, Overdrive will resume
normal operation.
2 (Second)
For moderate grades and to assist braking on dry pave-
ment or in mud and snow. Begins at a stop in low gear
with automatic upshift to 2nd gear. Will not shift to 3rd.1 (First)
For hard pulling at low speeds in mud, sand, snow, or on
steep grades. Begins and stays in low gear with no upshift.
Provides engine compression braking at low speeds.
CAUTION!
•Never press on the accelerator pedal with the
engine running, vehicle in gear, and the brakes
applied. Always apply the brakes when stopped
on a incline. Failure to follow these instructions
can cause overheating and damage to the trans-
mission.
•When “rocking” a stuck vehicle by moving be-
tween “First” and R (Reverse), do not spin the
wheels faster than 15 mph (24 km/h), or drivetrain
damage may result.
234 STARTING AND OPERATING

Over Temperature Mode
The transmission electronics constantly monitor the
transmission oil temperature. If the transmission gets too
hot, the transmission will change the way it shifts to help
control the condition. This may result in a slightly
different feeling or response during normal operation in
D (Drive) position. If the transmission becomes hot
enough the TRANS TEMP warning light in the instru-
ment cluster will come on. After the transmission cools
down, it will return to normal operation.
Torque Converter Clutch
A feature designed to improve fuel economy has been
added to the automatic transmission of this vehicle. A
clutch within the torque converter engages automatically
at calibrated speeds. This may result in a slightly differ-
ent feeling or response during normal operation in high
gear. When the vehicle speed drops or during accelera-
tion, the clutch automatically and smoothly disengages.NOTE:
•The torque converter clutch (TCC) will not engage
until the transmission fluid and engine coolant are
warm (usually after 1–3 miles (1.6–4.8 km) of driving)
and the vehicle speed is above approximately 30 mph
(48 km/h). To understand the difference in operation,
drive the vehicle so that TCC engagement conditions
are correct, and then press and release the “O/D OFF”
button once to disengage the TCC. Wait a few seconds,
and then press and release the “O/D OFF” button
again to engage the TCC. You will notice that the
engine runs at a higher RPM when driving at vehicle
speeds above approximately 30 mph (48 km/h) with
the TCC not engaged. This is a normal condition.
•If the vehicle has not been driven for several days, the
first few seconds of operation after shifting the trans-
mission into gear may seem sluggish. This is due to the
transmission fluid partially draining from the torque
converter into the transmission. This is considered a
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