Vacuum JEEP LIBERTY 2002 KJ / 1.G Owners Manual

Normal vehicle miles or engine misfire can cause a
catalyst to decay. This can increase vehicle emissions
and deteriorate engine performance, driveability and
fuel economy.
The catalyst monitor uses dual oxygen sensors
(O2S's) to monitor the efficiency of the converter. The
dual O2S's sensor strategy is based on the fact that
as a catalyst deteriorates, its oxygen storage capacity
and its efficiency are both reduced. By monitoring
the oxygen storage capacity of a catalyst, its effi-
ciency can be indirectly calculated. The upstream
O2S is used to detect the amount of oxygen in the
exhaust gas before the gas enters the catalytic con-
verter. The PCM calculates the A/F mixture from the
output of the O2S. A low voltage indicates high oxy-
gen content (lean mixture). A high voltage indicates a
low content of oxygen (rich mixture).
When the upstream O2S detects a lean condition,
there is an abundance of oxygen in the exhaust gas.
A functioning converter would store this oxygen so it
can use it for the oxidation of HC and CO. As the
converter absorbs the oxygen, there will be a lack of
oxygen downstream of the converter. The output of
the downstream O2S will indicate limited activity in
this condition.
As the converter loses the ability to store oxygen,
the condition can be detected from the behavior of
the downstream O2S. When the efficiency drops, no
chemical reaction takes place. This means the con-
centration of oxygen will be the same downstream as
upstream. The output voltage of the downstream
O2S copies the voltage of the upstream sensor. The
only difference is a time lag (seen by the PCM)
between the switching of the O2S's.
To monitor the system, the number of lean-to-rich
switches of upstream and downstream O2S's is
counted. The ratio of downstream switches to
upstream switches is used to determine whether the
catalyst is operating properly. An effective catalyst
will have fewer downstream switches than it has
upstream switches i.e., a ratio closer to zero. For a
totally ineffective catalyst, this ratio will be one-to-
one, indicating that no oxidation occurs in the device.
The system must be monitored so that when cata-
lyst efficiency deteriorates and exhaust emissions
increase to over the legal limit, the MIL will be illu-
minated.
DESCRIPTION - TRIP DEFINITION
The term ªTripº has different meanings depending
on what the circumstances are. If the MIL (Malfunc-
tion Indicator Lamp) is OFF, a Trip is defined as
when the Oxygen Sensor Monitor and the Catalyst
Monitor have been completed in the same drive cycle.
When any Emission DTC is set, the MIL on the
dash is turned ON. When the MIL is ON, it takes 3good trips to turn the MIL OFF. In this case, it
depends on what type of DTC is set to know what a
ªTripº is.
For the Fuel Monitor or Mis-Fire Monitor (contin-
uous monitor), the vehicle must be operated in the
ªSimilar Condition Windowº for a specified amount of
time to be considered a Good Trip.
If a Non-Contiuous OBDII Monitor fails twice in a
row and turns ON the MIL, re-running that monitor
which previously failed, on the next start-up and
passing the monitor, is considered to be a Good Trip.
These will include the following:
²Oxygen Sensor
²Catalyst Monitor
²Purge Flow Monitor
²Leak Detection Pump Monitor (if equipped)
²EGR Monitor (if equipped)
²Oxygen Sensor Heater Monitor
If any other Emission DTC is set (not an OBDII
Monitor), a Good Trip is considered to be when the
Oxygen Sensor Monitor and Catalyst Monitor have
been completed; or 2 Minutes of engine run time if
the Oxygen Sensor Monitor or Catalyst Monitor have
been stopped from running.
It can take up to 2 Failures in a row to turn on the
MIL. After the MIL is ON, it takes 3 Good Trips to
turn the MIL OFF. After the MIL is OFF, the PCM
will self-erase the DTC after 40 Warm-up cycles. A
Warm-up cycle is counted when the ECT (Engine
Coolant Temperature Sensor) has crossed 160ÉF and
has risen by at least 40ÉF since the engine has been
started.
DESCRIPTION - COMPONENT MONITORS
There are several components that will affect vehi-
cle emissions if they malfunction. If one of these com-
ponents malfunctions the Malfunction Indicator
Lamp (MIL) will illuminate.
Some of the component monitors are checking for
proper operation of the part. Electrically operated
components now have input (rationality) and output
(functionality) checks. Previously, a component like
the Throttle Position sensor (TPS) was checked by
the PCM for an open or shorted circuit. If one of
these conditions occurred, a DTC was set. Now there
is a check to ensure that the component is working.
This is done by watching for a TPS indication of a
greater or lesser throttle opening than MAP and
engine rpm indicate. In the case of the TPS, if engine
vacuum is high and engine rpm is 1600 or greater
and the TPS indicates a large throttle opening, a
DTC will be set. The same applies to low vacuum if
the TPS indicates a small throttle opening.
All open/short circuit checks or any component that
has an associated limp in will set a fault after 1 trip
with the malfunction present. Components without
KJEMISSIONS CONTROL 25 - 19
EMISSIONS CONTROL (Continued)

an associated limp in will take two trips to illumi-
nate the MIL.
Refer to the Diagnostic Trouble Codes Description
Charts in this section and the appropriate Power-
train Diagnostic Procedure Manual for diagnostic
procedures.
DESCRIPTION - NON-MONITORED CIRCUITS
The PCM does not monitor the following circuits,
systems and conditions that could have malfunctions
causing driveability problems. The PCM might not
store diagnostic trouble codes for these conditions.
However, problems with these systems may cause the
PCM to store diagnostic trouble codes for other sys-
tems or components. For example, a fuel pressure
problem will not register a fault directly, but could
cause a rich/lean condition or misfire. This could
cause the PCM to store an oxygen sensor or misfire
diagnostic trouble code
FUEL PRESSURE
The fuel pressure regulator controls fuel system
pressure. The PCM cannot detect a clogged fuel
pump inlet filter, clogged in-line fuel filter, or a
pinched fuel supply or return line. However, these
could result in a rich or lean condition causing the
PCM to store an oxygen sensor or fuel system diag-
nostic trouble code.
SECONDARY IGNITION CIRCUIT
The PCM cannot detect an inoperative ignition coil,
fouled or worn spark plugs, ignition cross firing, or
open spark plug cables.
CYLINDER COMPRESSION
The PCM cannot detect uneven, low, or high engine
cylinder compression.
EXHAUST SYSTEM
The PCM cannot detect a plugged, restricted or
leaking exhaust system, although it may set a fuel
system fault.
FUEL INJECTOR MECHANICAL MALFUNCTIONS
The PCM cannot determine if a fuel injector is
clogged, the needle is sticking or if the wrong injectoris installed. However, these could result in a rich or
lean condition causing the PCM to store a diagnostic
trouble code for either misfire, an oxygen sensor, or
the fuel system.
EXCESSIVE OIL CONSUMPTION
Although the PCM monitors engine exhaust oxygen
content when the system is in closed loop, it cannot
determine excessive oil consumption.
THROTTLE BODY AIRFLOW
The PCM cannot detect a clogged or restricted air
cleaner inlet or filter element.
VACUUM ASSIST
The PCM cannot detect leaks or restrictions in the
vacuum circuits of vacuum assisted engine control
system devices. However, these could cause the PCM
to store a MAP sensor diagnostic trouble code and
cause a high idle condition.
PCM SYSTEM GROUND
The PCM cannot determine a poor system ground.
However, one or more diagnostic trouble codes may
be generated as a result of this condition. The mod-
ule should be mounted to the body at all times, also
during diagnostic.
PCM CONNECTOR ENGAGEMENT
The PCM may not be able to determine spread or
damaged connector pins. However, it might store
diagnostic trouble codes as a result of spread connec-
tor pins.
DESCRIPTION - HIGH AND LOW LIMITS
The PCM compares input signal voltages from each
input device with established high and low limits for
the device. If the input voltage is not within limits
and other criteria are met, the PCM stores a diagnos-
tic trouble code in memory. Other diagnostic trouble
code criteria might include engine RPM limits or
input voltages from other sensors or switches that
must be present before verifying a diagnostic trouble
code condition.
DESCRIPTION - LOAD VALUE
ENGINE IDLE/NEUTRAL 2500 RPM/NEUTRAL
All Engines 2% to 8% of Maximum Load 9% to 17% of Maximum Load
25 - 20 EMISSIONS CONTROLKJ
EMISSIONS CONTROL (Continued)

EVAPORATIVE EMISSIONS
TABLE OF CONTENTS
page page
EVAPORATIVE EMISSIONS
DESCRIPTION - EVAPORATION CONTROL
SYSTEM............................24
SPECIFICATIONS
TORQUE............................26
EVAP/PURGE SOLENOID
DESCRIPTION.........................27
OPERATION...........................27
REMOVAL.............................27
INSTALLATION.........................27
FUEL FILLER CAP
DESCRIPTION.........................27
OPERATION...........................27
LEAK DETECTION PUMP
DESCRIPTION.........................27
OPERATION...........................28
REMOVAL.............................28INSTALLATION.........................28
ORVR
DESCRIPTION.........................29
OPERATION...........................29
P C V VA LV E
DESCRIPTION.........................29
OPERATION...........................31
DIAGNOSIS AND TESTING - PCV VALVE.....31
REMOVAL.............................32
INSTALLATION.........................32
VACUUM LINES
DESCRIPTION.........................33
VAPOR CANISTER
DESCRIPTION.........................33
OPERATION...........................33
REMOVAL.............................33
INSTALLATION.........................33
EVAPORATIVE EMISSIONS
DESCRIPTION - EVAPORATION CONTROL
SYSTEM
The evaporation control system prevents the emis-
sion of fuel tank vapors into the atmosphere. When
fuel evaporates in the fuel tank, the vapors pass
through the control valve located in the top section of
the fuel pump module, through the fuel management
valve, and through vent hoses and tubes to a char-
coal filled evaporative canister. The canister tempo-
rarily holds the vapors. The Powertrain Control
Module (PCM) allows intake manifold vacuum to
draw vapors into the combustion chambers during
certain operating conditions.
Gas powered engines use a duty cycle purge sys-
tem. The PCM controls vapor flow by operating theduty cycle EVAP purge solenoid. Refer to Duty Cycle
EVAP Canister Purge Solenoid.
When equipped with certain emissions packages, a
Leak Detection Pump (LDP) will be used as part of
the evaporative system for OBD II requirements.
Also refer to Leak Detection Pump.
Vehicles powered with gasoline engines are also
equipped with ORVR (On-Board Refueling Vapor
Recovery). Refer to ORVR for additional information.
NOTE: The evaporative system uses specially man-
ufactured lines/hoses. If replacement becomes nec-
essary, only use fuel resistant, low permeation
hose.
Certain components can be found in (Fig. 1).
25 - 24 EVAPORATIVE EMISSIONSKJ

EVAP/PURGE SOLENOID
DESCRIPTION
The duty cycle EVAP canister purge solenoid (DCP)
is located in the engine compartment. It is attached
to a bracket located between the battery and the
Power Distribution Center (PDC). The EVAP system
test port is located near the solenoid.
OPERATION
The duty cycle EVAP canister purge solenoid (DCP)
regulates the rate of vapor flow from the EVAP can-
ister to the intake manifold. The Powertrain Control
Module (PCM) operates the solenoid.
During the cold start warm-up period and the hot
start time delay, the PCM does not energize the sole-
noid. When de-energized, no vapors are purged. The
PCM de-energizes the solenoid during open loop oper-
ation.
The engine enters closed loop operation after it
reaches a specified temperature and the time delay
ends. During closed loop operation, the PCM cycles
(energizes and de-energizes) the solenoid 5 or 10
times per second, depending upon operating condi-
tions. The PCM varies the vapor flow rate by chang-
ing solenoid pulse width. Pulse width is the amount
of time that the solenoid is energized. The PCM
adjusts solenoid pulse width based on engine operat-
ing condition.
REMOVAL
The duty cycle EVAP canister purge solenoid (DCP)
is located in the engine compartment (Fig. 2). It is
attached to a bracket located between the battery
and the Power Distribution Center (PDC). The EVAP
system test port is located near the solenoid (Fig. 2).
(1) Disconnect electrical wiring connector at sole-
noid.
(2) Disconnect vacuum harness at solenoid.
(3) Remove solenoid and its support bracket (pull
straight up).
INSTALLATION
(1) Slip EVAP canister purge solenoid onto its
mounting bracket.
(2) Connect vacuum harness to solenoid.
(3) Connect electrical connector to solenoid.
FUEL FILLER CAP
DESCRIPTION
The plastic fuel tank filler tube cap is threaded
onto the end of the fuel fill tube. All models are
equipped with a 1/4 turn cap.
OPERATION
The loss of any fuel or vapor out of fuel filler tube
is prevented by the use of a pressure-vacuum fuel fill
cap. Relief valves inside the cap will release fuel tank
pressure at predetermined pressures. Fuel tank vac-
uum will also be released at predetermined values.
This cap must be replaced by a similar unit if
replacement is necessary. This is in order for the sys-
tem to remain effective.
CAUTION: Remove fill cap before servicing any fuel
system component to relieve tank pressure. If
equipped with an ORVR system and a Leak Detec-
tion Pump (LDP), the cap must be tightened
securely. If cap is left loose, a Diagnostic Trouble
Code (DTC) may be set.
LEAK DETECTION PUMP
DESCRIPTION
The Leak Detection Pump (LDP) is bolted to the
front of the fuel tank (Fig. 1).
The Leak Detection Pump (LDP) is used only with
certain emission packages.
The LDP is a device used to detect a leak in the
evaporative system.
Fig. 2 EVAP / PURGE SOLENOID LOCATION
1 - BATTERY
2 - EVAP/PURGE SOLENOID LOCATION
3 - MOUNTING BRACKET
4 - POWER DISTRIBUTION CENTER (PDC)
5 - SOLENOID ELECTRICAL CONNECTOR
6 - EVAP SYSTEM TEST PORT
KJEVAPORATIVE EMISSIONS 25 - 27

The pump contains a 3 port solenoid, a pump that
contains a switch, a spring loaded canister vent valve
seal, 2 check valves and a spring/diaphragm.
OPERATION
Immediately after a cold start, engine temperature
between 40ÉF and 86ÉF, the 3 port solenoid is briefly
energized. This initializes the pump by drawing air
into the pump cavity and also closes the vent seal.
During non-test test conditions, the vent seal is held
open by the pump diaphragm assembly which pushes
it open at the full travel position. The vent seal will
remain closed while the pump is cycling. This is due
to the operation of the 3 port solenoid which prevents
the diaphragm assembly from reaching full travel.
After the brief initialization period, the solenoid is
de-energized, allowing atmospheric pressure to enter
the pump cavity. This permits the spring to drive the
diaphragm which forces air out of the pump cavity
and into the vent system. When the solenoid is ener-
gized and de-energized, the cycle is repeated creating
flow in typical diaphragm pump fashion. The pump
is controlled in 2 modes:
PUMP MODE:The pump is cycled at a fixed rate
to achieve a rapid pressure build in order to shorten
the overall test time.
TEST MODE:The solenoid is energized with a
fixed duration pulse. Subsequent fixed pulses occur
when the diaphragm reaches the switch closure
point.
The spring in the pump is set so that the system
will achieve an equalized pressure of about 7.5 inches
of water.
When the pump starts, the cycle rate is quite high.
As the system becomes pressurized pump rate drops.
If there is no leak the pump will quit. If there is a
leak, the test is terminated at the end of the test
mode.
If there is no leak, the purge monitor is run. If the
cycle rate increases due to the flow through the
purge system, the test is passed and the diagnostic is
complete.
The canister vent valve will unseal the system
after completion of the test sequence as the pump
diaphragm assembly moves to the full travel position.
REMOVAL
The Leak Detection Pump (LDP) is attached (bolt-
ed) to the front of the fuel tank (Fig. 3). The LDP
fresh air filter is located on the end of a hose. This
hose is attached to the fuel fill tube assembly below
and near the fuel fill opening (Fig. 1). The LDP and
LDP filter are typically replaced (serviced) as one
unit.
(1) Raise vehicle.(2) Carefully remove two 3/4º vent hoses at sides
of LDP.
(3) Carefully remove other vapor/vacuum hoses
from LDP.
(4) Place a hydraulic jack under fuel tank.
(5) Loosen 2 fuel tank strap mounting bolts at
front of tank about 10 turns.
(6) Lower front of fuel tank about 1/2º.
(7) Remove 2 LDP mounting nuts (Fig. 3) and
lower LDP slightly to gain access to electrical connec-
tor (Fig. 4).
(8) Disconnect electrical connector at LDP. To dis-
connect: Slide red colored tab upward. Push on black
colored tab while removing connector.
(9) Remove LDP from vehicle.
INSTALLATION
The Leak Detection Pump (LDP) is attached (bolt-
ed) to the front of the fuel tank. The LDP filter is
located on the end of a hose. This hose is attached to
the fuel fill tube assembly below and near the fuel
fill opening. The LDP and LDP filter are replaced
(serviced) as one unit.
(1) Install electrical connector to LDP. Push red
colored tab downward to lock connector to LDP.
(2) Position LDP and LDP bracket to fuel tank
mounting studs and install 2 nuts. Tighten nuts to 1
N´m (11 in. lbs.) torque.
(3) Raise fuel tank to body and tighten 2 strap
bolts to 61 N´m (45 ft. lbs.) torque.
Fig. 3 LDP LOCATION / MOUNTING
1 - LDP
2 - FLOW MANAGEMENT VALVE
3 - MOUNTING NUTS
4 - FRONT OF FUEL TANK
25 - 28 EVAPORATIVE EMISSIONSKJ
LEAK DETECTION PUMP (Continued)

(4) Carefully install vapor/vacuum lines to LDP,
and install hose to LDP filter.The vapor/vacuum
lines and hoses must be firmly connected.
Check the vapor/vacuum lines at the LDP, LDP
filter and EVAP canister duty cycle purge sole-
noid for damage or leaks. If a leak is present, a
Diagnostic Trouble Code (DTC) may be set.
ORVR
DESCRIPTION
The ORVR (On-Board Refueling Vapor Recovery)
system consists of a unique fuel tank, flow manage-
ment valve, fluid control valve, one-way check valve
and vapor canister (Fig. 1).
OPERATION
The ORVR (On-Board Refueling Vapor Recovery)
system is used to remove excess fuel tank vapors.
This is done while the vehicle is being refueled. Cer-
tain ORVR components can be found in (Fig. 1).
Fuel flowing into the fuel filler tube (approx. 1º
I.D.) creates an aspiration effect drawing air into the
fuel fill tube. During refueling, the fuel tank is
vented to the EVAP canister to capture escaping
vapors. With air flowing into the filler tube, there are
no fuel vapors escaping to the atmosphere. Once the
refueling vapors are captured by the EVAP canister,the vehicle's computer controlled purge system draws
vapor out of the canister for the engine to burn. The
vapor flow is metered by the purge solenoid so that
there is no, or minimal impact on driveability or
tailpipe emissions.
As fuel starts to flow through the fuel fill tube, it
opens the normally closed check valve and enters the
fuel tank. Vapor or air is expelled from the tank
through the control valve and on to the vapor canis-
ter. Vapor is absorbed in the EVAP canister until
vapor flow in the lines stops. This stoppage occurs
following fuel shut-off, or by having the fuel level in
the tank rise high enough to close the control valve.
This control valve contains a float that rises to seal
the large diameter vent path to the EVAP canister.
At this point in the refueling process, fuel tank pres-
sure increases, the check valve closes (preventing liq-
uid fuel from spiting back at the operator), and fuel
then rises up the fuel filler tube to shut off the dis-
pensing nozzle.
PCV VALVE
DESCRIPTION
2.4L
The 2.4L 4-cylinder engine is equipped with a
closed crankcase ventilation system and a Positive
Crankcase Ventilation (PCV) valve.
This system consists of:
²a PCV valve attached to the left/front side of the
valve cover (Fig. 5). It is secured with 1 bolt. An
o-ring is used to seal valve to valve cover (Fig. 6).
²the air cleaner housing
²tubes and hoses to connect the system compo-
nents.
3.7L
The 3.7L V-6 engine is equipped with a closed
crankcase ventilation system and a Positive Crank-
case Ventilation (PCV) valve.
This system consists of:
²a PCV valve mounted to the oil filler housing
(Fig. 7). The PCV valve is sealed to the oil filler
housing with an o-ring.
²the air cleaner housing
²two interconnected breathers threaded into the
rear of each cylinder head (Fig. 8).
²tubes and hoses to connect the system compo-
nents.
Fig. 4 LDP ELECTRICAL CONNECTOR
1 - LEAK DETECTION PUMP (LDP)
2 - ELECTRICAL CONNECTOR
3 - FUEL FILTER
KJEVAPORATIVE EMISSIONS 25 - 29
LEAK DETECTION PUMP (Continued)

OPERATION
The PCV system operates by engine intake mani-
fold vacuum. Filtered air is routed into the crankcase
through the air cleaner hose and crankcase breath-
er(s) (if used). The metered air, along with crankcase
vapors, are drawn through the PCV valve and into a
passage in the intake manifold. The PCV system
manages crankcase pressure and meters blow-by
gases to the intake system, reducing engine sludge
formation.
The PCV valve contains a spring loaded plunger.
This plunger meters the amount of crankcase vapors
routed into the combustion chamber based on intake
manifold vacuum.
TYPICALPCV valves are shown in (Fig. 9), (Fig.
10) and (Fig. 11).
When the engine is not operating, or during an
engine pop-back, the spring forces the plunger back
against the seat (Fig. 9). This will prevent vapors
from flowing through the valve.
During periods of high manifold vacuum, such as
idle or cruising speeds, vacuum is sufficient to com-
pletely compress spring. It will then pull the plunger
to the top of the valve (Fig. 10). In this position there
is minimal vapor flow through the valve.
During periods of moderate manifold vacuum, the
plunger is only pulled part way back from inlet. This
results in maximum vapor flow through the valve
(Fig. 11).
DIAGNOSIS AND TESTING - PCV VALVE
3.7L
(1) Disconnect PCV line/hose (Fig. 7) by discon-
necting rubber connecting hose at PCV valve fitting.
(2) Remove PCV valve at oil filler tube by rotating
PCV valve downward until locating tabs have been
freed at cam lock (Fig. 7). After tabs have cleared,
pull valve straight out from filler tube.To prevent
damage to PCV valve locating tabs, valve must
be pointed downward for removal. Do not force
valve from oil filler tube.
(3) After valve is removed, check condition of valve
o-ring (Fig. 7). Also, PCV valve should rattle when
shaken.
(4) Reconnect PCV valve to its connecting line/
hose.
(5) Start engine and bring to idle speed.
(6) If valve is not plugged, a hissing noise will be
heard as air passes through valve. Also, a strong vac-
uum should be felt with a finger placed at valve
inlet.
(7) If vacuum is not felt at valve inlet, check line/
hose for kinks or for obstruction. If necessary, clean
out intake manifold fitting at rear of manifold. Do
this by turning a 1/4 inch drill (by hand) through the
fitting to dislodge any solid particles. Blow out the
fitting with shop air. If necessary, use a smaller drill
to avoid removing any metal from the fitting.
(8)Do not attempt to clean the old PCV valve.
(9) Return PCV valve back to oil filler tube by
placing valve locating tabs (Fig. 7) into cam lock.
Press PCV valve in and rotate valve upward. A slight
click will be felt when tabs have engaged cam lock.
Valve should be pointed towards rear of vehicle.
(10) Connect PCV line/hose and connecting rubber
hose to PCV valve.
(11) Disconnect rubber hose from fresh air fitting
at air cleaner resonator box. Start engine and bring
to idle speed. Hold a piece of stiff paper (such as a
parts tag) loosely over the opening of the discon-
nected rubber hose.
(12) The paper should be drawn against the hose
opening with noticeable force. This will be after
allowing approximately one minute for crankcase
pressure to reduce.
Fig. 9 Engine Off or Engine Pop-BackÐNo Vapor
Flow
Fig. 10 High Intake Manifold VacuumÐMinimal
Vapor Flow
Fig. 11 Moderate Intake Manifold VacuumÐ
Maximum Vapor Flow
KJEVAPORATIVE EMISSIONS 25 - 31
PCV VALVE (Continued)

(13) If vacuum is not present, disconnect each PCV
system hose at top of each crankcase breather (Fig.
8). Check for obstructions or restrictions.
(14) If vacuum is still not present, remove each
PCV system crankcase breather (Fig. 8) from each
cylinder head. Check for obstructions or restrictions.
If plugged, replace breather. Tighten breather to 12
N´m (106 in. lbs.) torque. Do not attempt to clean
breather
(15) If vacuum is still not present, disconnect each
PCV system hose at each fitting and check for
obstructions or restrictions.
REMOVAL
2.4L
The PCV valve is attached to the left/front side of
the valve cover (Fig. 5). It is secured with 1 bolt. An
o-ring is used to seal valve to valve cover (Fig. 6).
(1) Remove hose from valve (Fig. 5). Check condi-
tion of hose.
(2) Remove 1 bolt.
(3) Remove PCV valve from valve cover.
(4) Check condition of valve o-ring.
3.7L
The PCV valve is located on the oil filler tube (Fig.
12). Two locating tabs are located on the side of the
valve (Fig. 12). These 2 tabs fit into a cam lock in the
oil filler tube. An o-ring seals the valve to the filler
tube.
(1) Disconnect PCV line/hose (Fig. 12) by discon-
necting rubber hose at PCV valve fitting.
(2) Remove PCV valve at oil filler tube by rotating
PCV valve downward (counter-clockwise) until locat-
ing tabs have been freed at cam lock (Fig. 12). After
tabs have cleared, pull valve straight out from filler
tube.To prevent damage to PCV valve locating
tabs, valve must be pointed downward for
removal. Do not force valve from oil filler tube.
(3) After valve is removed, check condition of valve
o-ring (Fig. 12).
INSTALLATION
2.4L
(1) Check condition of PCV valve o-ring.
(2) Install PCV valve into valve cover.
(3) Install PCV valve mounting bolt.
(4) Install hose to valve.3.7L
The PCV valve is located on the oil filler tube. Two
locating tabs are located on the side of the valve.
These 2 tabs fit into a cam lock in the oil filler tube.
An o-ring seals the valve to the filler tube.
(1) Return PCV valve back to oil filler tube by
placing valve locating tabs into cam lock. Press PCV
valve in and rotate valve upward. A slight click will
be felt when tabs have engaged cam lock. Valve
should be pointed towards rear of vehicle.
(2) Connect PCV line/hose and rubber hose to PCV
valve.
Fig. 12 PCV Valve/Oil Filler Tube Location
1 - O-RING
2 - LOCATING TABS
3 - CAM LOCK
4 - OIL FILLER TUBE
5 - PCV LINE/HOSE
6 - P C V VA LV E
25 - 32 EVAPORATIVE EMISSIONSKJ
PCV VALVE (Continued)

VACUUM LINES
DESCRIPTION
A vacuum schematic for emission related items can
be found on the VECI label. Refer to Vehicle Emis-
sion Control Information (VECI) Label for label loca-
tion.
VAPOR CANISTER
DESCRIPTION
A maintenance free, EVAP canister is used on all
gasoline powered models. The EVAP canister is
located near the left/front corner of the fuel tank.
OPERATION
The EVAP canister is filled with granules of an
activated carbon mixture. Fuel vapors entering the
EVAP canister are absorbed by the charcoal granules.
The canister serves two functions: as a temporary
fuel vapor storage point while refueling the vehicle
for the ORVR system, as a temporary vapor storage
point while the engine is running.
Fuel tank pressure vents into the EVAP canister.
Fuel vapors are temporarily held in the canister until
they can be drawn into the intake manifold. The duty
cycle EVAP canister purge solenoid allows the EVAP
canister to be purged at predetermined times and at
certain engine operating conditions.
Refer to ORVR for additional information.
REMOVAL
The EVAP canister is located near front of fuel
tank and next to left/rear spring. (Fig. 13).
(1) Raise vehicle.
(2) Disconnect vacuum hoses/lines at EVAP canis-
ter. Note location of lines before removal.
(3) Remove EVAP canister and mounting bracket
assembly from body (2 bolts).
(4) Remove canister-to-mounting bracket bolt.
(5) Slide 2 canister mounting pins from mounting
bracket (Fig. 14).
INSTALLATION
(1) Slide 2 canister mounting pins into mounting
bracket (Fig. 14).
(2) Install canister-to-mounting bracket bolt.
(3) Position canister and bracket assembly to body.
(4) Install 2 mounting bracket bolts. Tighten to 47
N´m (35 ft. lbs.) torque.
(5) Connect vacuum hoses/lines at EVAP canister.
(6) Lower vehicle.
Fig. 13 EVAP CANISTER LOCATION
1 - LEFT/REAR SPRING
2 - EVAP CANISTER
3 - MOUNTING BRACKET
4 - BRACKET BOLTS
5 - VACUUM LINES
Fig. 14 EVAP CANISTER MOUNTING PINS
1 - MOUNTING PINS
2 - MOUNTING BRACKET
3 - EVAP CANISTER
KJEVAPORATIVE EMISSIONS 25 - 33

CASE BEARINGS - REMOVAL,
DIFFERENTIAL...............3-110,3-43,3-79
CASE, NV231 - TRANSFER............21-206
CASE, NV242 - TRANSFER............21-244
CASE SKID PLATE - INSTALLATION,
TRANSFER...........................13-7
CASE SKID PLATE - REMOVAL,
TRANSFER...........................13-7
CASE, SPECIFICATIONS - NV242
TRANSFER.........................21-244
CASTER ADJUSTMENT - STANDARD
PROCEDURE, CAMBER..................2-5
CASTER AND TOE ADJUSTMENT -
STANDARD PROCEDURE, CAMBER........2-5
CATALYTIC CONVERTER - DESCRIPTION . . . 11-2
CATALYTIC CONVERTER - INSPECTION....11-3
CATALYTIC CONVERTER - INSTALLATION . . . 11-3
CATALYTIC CONVERTER - REMOVAL......11-2
CAUSES OF BURNT FLUID - DIAGNOSIS
AND TESTING......................21-125
CAUTION - SERVICE CAUTIONS.........24-39
CAUTION, HALF SHAFT.................3-10
CAUTION, REFRIGERANT HOSES/LINES/
TUBES PRECAUTIONS.................24-40
CAUTIONS, CAUTION - SERVICE.........24-39
CD CHANGER - DESCRIPTION...........8A-7
CD CHANGER - INSTALLATION...........8A-7
CD CHANGER - OPERATION.............8A-7
CD CHANGER - REMOVAL..............8A-7
CENTER - DESCRIPTION, POWER
DISTRIBUTION....................8W-97-6
CENTER - OPERATION, POWER
DISTRIBUTION....................8W-97-7
CENTER - REMOVAL, POWER
DISTRIBUTION....................8W-97-7
CENTER ASSEMBLY, ASSEMBLY -
POWER DISTRIBUTION.............8W-97-10
CENTER BEZEL - INSTALLATION,
INSTRUMENT PANEL.................23-154
CENTER BEZEL - REMOVAL,
INSTRUMENT PANEL.................23-154
CENTER DISASSEMBLY, DISASSEMBLY -
POWER DISTRIBUTION..............8W-97-7
CENTER HIGH MOUNTED STOP LAMP
BULB - INSTALLATION................8L-19
CENTER HIGH MOUNTED STOP LAMP
BULB - REMOVAL....................8L-18
CENTER HIGH MOUNTED STOP LAMP
UNIT - INSTALLATION.................8L-19
CENTER HIGH MOUNTED STOP LAMP
UNIT - REMOVAL....................8L-19
CENTER SEAT BELT & RETRACTOR -
INSTALLATION, REAR.................8O-33
CENTER SEAT BELT & RETRACTOR -
REMOVAL, REAR....................8O-32
CENTERING - STANDARD PROCEDURE,
CLOCKSPRING......................8O-14
CERTIFICATION LABEL - DESCRIPTION,
VEHICLE SAFETY...................Intro.-9
CHAIN COVER(S) - INSTALLATION,
TIMING BELT.........................9-76
CHAIN COVER(S) - REMOVAL, TIMING
BELT ...............................9-74
CHAIN WEAR, STANDARD PROCEDURE -
MEASURING TIMING...................9-71
CHANGER - DESCRIPTION, CD...........8A-7
CHANGER - INSTALLATION, CD..........8A-7
CHANGER - OPERATION, CD.............8A-7
CHANGER - REMOVAL, CD..............8A-7
CHANNEL - INSTALLATION, GLASS RUN . 23-123,
23-130
CHANNEL - REMOVAL, GLASS RUN....23-123,
23-130
CHARGE - STANDARD PROCEDURE,
REFRIGERANT SYSTEM...............24-41
CHARGE CAPACITY - SPECIFICATIONS....24-42
CHARGING - STANDARD PROCEDURE,
BATTERY............................8F-8
CHARGING INDICATOR - DESCRIPTION . . . 8J-15
CHARGING INDICATOR - OPERATION.....8J-15
CHARGING SYSTEM - DESCRIPTION
.....8F-22
CHARGING SYSTEM - DIAGNOSIS AND
TESTING
...........................8F-22
CHARGING SYSTEM - OPERATION
.......8F-22
CHART - DIAGNOSIS AND TESTING,
COOLING SYSTEM DIAGNOSIS
............7-6
CHART, SPECIFICATIONS - TORQUE
.....19-15,
19-19,19-8CHART, SPECIFICATIONS - TORQUE....2-17,2-8
CHECK - STANDARD PROCEDURE, FLUID
LEVEL............................21-126
CHECK - STANDARD PROCEDURE, OIL
PUMP VOLUME.....................21-148
CHECK STRAP - INSTALLATION . . 23-121,23-128,
23-135
CHECK STRAP - REMOVAL.....23-121,23-128,
23-135
CHECK VALVE - DESCRIPTION, FRONT....8R-8
CHECK VALVE - DESCRIPTION, FUEL
TANK ..............................14-28
CHECK VALVE - DESCRIPTION, REAR....8R-34
CHECK VALVE - DESCRIPTION, VACUUM . . 24-28
CHECK VALVE - INSTALLATION, FRONT....8R-9
CHECK VALVE - INSTALLATION, FUEL
TANK ..............................14-28
CHECK VALVE - INSTALLATION, REAR....8R-35
CHECK VALVE - INSTALLATION, VACUUM . 24-28
CHECK VALVE - OPERATION, FRONT......8R-9
CHECK VALVE - OPERATION, FUEL TANK . . 14-28
CHECK VALVE - OPERATION, REAR......8R-34
CHECK VALVE - OPERATION, VACUUM....24-28
CHECK VALVE - REMOVAL, FRONT.......8R-9
CHECK VALVE - REMOVAL, FUEL TANK . . . 14-28
CHECK VALVE - REMOVAL, REAR.......8R-34
CHECK VALVE - REMOVAL, VACUUM.....24-28
CHECKING TRANSMISSION CLUTCH
OPERATION - DIAGNOSIS AND
TESTING, AIR.......................21-80
CHECKS - DIAGNOSIS AND TESTING,
PRELIMINARY.........................7-3
CHILD TETHER ANCHOR - DESCRIPTION . . 8O-13
CHILD TETHER ANCHOR - OPERATION . . . 8O-13
CHIME WARNING SYSTEM -
DESCRIPTION........................8B-1
CHIME WARNING SYSTEM - DIAGNOSIS
AND TESTING........................8B-6
CHIME WARNING SYSTEM - OPERATION . . . 8B-2
CHOKE AND RELAY - DESCRIPTION,
AMPLIFIER..........................8A-3
CHOKE AND RELAY - DIAGNOSIS AND
TESTING, AMPLIFIER..................8A-4
CHOKE AND RELAY - INSTALLATION,
AMPLIFIER..........................8A-4
CHOKE AND RELAY - OPERATION,
AMPLIFIER..........................8A-3
CHOKE AND RELAY - REMOVAL,
AMPLIFIER..........................8A-4
CIGAR LIGHTER OUTLET -
DESCRIPTION.....................8W-97-2
CIGAR LIGHTER OUTLET - DIAGNOSIS
AND TESTING.....................8W-97-2
CIGAR LIGHTER OUTLET - OPERATION . 8W-97-2
CLEVIS BRACKET - INSTALLATION........2-13
CLEVIS BRACKET - REMOVAL...........2-13
CLOCKSPRING - DESCRIPTION.........8O-13
CLOCKSPRING - INSTALLATION.........8O-16
CLOCKSPRING - OPERATION...........8O-14
CLOCKSPRING - REMOVAL............8O-15
CLOCKSPRING CENTERING - STANDARD
PROCEDURE........................8O-14
CLUSTER - ASSEMBLY, INSTRUMENT....8J-10
CLUSTER - DESCRIPTION, INSTRUMENT . . . 8J-2
CLUSTER - DIAGNOSIS AND TESTING,
INSTRUMENT........................8J-7
CLUSTER - DISASSEMBLY, INSTRUMENT . . . 8J-9
CLUSTER - INSTALLATION, INSTRUMENT . 8J-11
CLUSTER - OPERATION, INSTRUMENT.....8J-4
CLUSTER - REMOVAL, INSTRUMENT......8J-9
CLUSTER BEZEL - INSTALLATION.......23-147
CLUSTER BEZEL - REMOVAL..........23-147
CLUTCH - ASSEMBLY, LOW/REVERSE
. . . 21-146
CLUTCH - CLEANING, LOW/REVERSE
....21-146
CLUTCH - DESCRIPTION
.................6-1
CLUTCH - DIAGNOSIS AND TESTING
.......6-2
CLUTCH - DISASSEMBLY, LOW/REVERSE
. 21-145
CLUTCH - INSPECTION, A/C
COMPRESSOR
.......................24-14
CLUTCH - INSPECTION, LOW/REVERSE
. . 21-146
CLUTCH - INSTALLATION, A/C
COMPRESSOR
.......................24-14
CLUTCH - OPERATION
..................6-1
CLUTCH - REMOVAL, A/C COMPRESSOR
. . 24-13
CLUTCH - SPECIFICATIONS
...............6-5
CLUTCH - WARNING
....................6-2
CLUTCH ASSEMBLY - ASSEMBLY, INPUT
. 21-138CLUTCH ASSEMBLY - DESCRIPTION,
INPUT............................21-133
CLUTCH ASSEMBLY - DISASSEMBLY,
INPUT............................21-135
CLUTCH ASSEMBLY - OPERATION,
INPUT............................21-135
CLUTCH BREAK-IN - STANDARD
PROCEDURE, A/C COMPRESSOR........24-12
CLUTCH COIL - DIAGNOSIS AND
TESTING, A/C COMPRESSOR...........24-12
CLUTCH DISC - INSTALLATION............6-6
CLUTCH DISC - REMOVAL...............6-6
CLUTCH OPERATION - DIAGNOSIS AND
TESTING, AIR CHECKING
TRANSMISSION......................21-80
CLUTCH PEDAL - INSTALLATION.........6-10
CLUTCH PEDAL - REMOVAL.............6-10
CLUTCH PEDAL POSITION SWITCH -
DESCRIPTION........................6-11
CLUTCH PEDAL POSITION SWITCH -
DIAGNOSIS AND TESTING..............6-11
CLUTCH PEDAL POSITION SWITCH -
OPERATION..........................6-11
CLUTCH RELAY - DESCRIPTION, A/C
COMPRESSOR.......................24-15
CLUTCH RELAY - DIAGNOSIS AND
TESTING, COMPRESSOR...............24-15
CLUTCH RELAY - INSTALLATION, A/C
COMPRESSOR.......................24-16
CLUTCH RELAY - OPERATION, A/C
COMPRESSOR.......................24-15
CLUTCH RELAY - REMOVAL, A/C
COMPRESSOR........................24-16
CLUTCH RELEASE BEARING -
INSTALLATION.........................6-6
CLUTCH RELEASE BEARING - REMOVAL....6-6
CLUTCH SWITCH OVERRIDE RELAY -
DESCRIPTION........................6-10
CLUTCH SWITCH OVERRIDE RELAY -
INSTALLATION........................6-10
CLUTCH SWITCH OVERRIDE RELAY -
OPERATION..........................6-10
CLUTCH SWITCH OVERRIDE RELAY -
REMOVAL...........................6-10
CLUTCHES - DESCRIPTION, HOLDING . . . 21-131
CLUTCHES - OPERATION, HOLDING.....21-132
CMTC LAMP REPLACEMENT -
STANDARD PROCEDURE...............8M-2
COAT FINISH - DESCRIPTION, BASE
COAT/CLEAR.......................23-162
COAT/CLEAR COAT FINISH -
DESCRIPTION, BASE.................23-162
CODE - DESCRIPTION, PAINT..........23-162
CODES - DESCRIPTION, DIAGNOSTIC
TROUBLE............................25-2
CODES - SPECIFICATIONS, PAINT.......23-162
CODES - STANDARD PROCEDURE,
ERASING TRANSMITTER...............8M-8
CODES - STANDARD PROCEDURE,
SETTING TRANSMITTER...............8M-9
COIL - DESCRIPTION, IGNITION..........8I-9
COIL - DIAGNOSIS AND TESTING, A/C
COMPRESSOR CLUTCH...............24-12
COIL - INSTALLATION, IGNITION.........8I-10
COIL - OPERATION, IGNITION............8I-9
COIL - REMOVAL, IGNITION............8I-10
COIL CAPACITOR - DESCRIPTION,
IGNITION...........................8I-16
COIL CAPACITOR - INSTALLATION,
IGNITION...........................8I-16
COIL CAPACITOR - OPERATION,
IGNITION...........................8I-16
COIL CAPACITOR - REMOVAL, IGNITION . . . 8I-16
COIL RESISTANCE, 2.4L - IGNITION
.......8I-2
COIL RESISTANCE, 3.7L V-6 - IGNITION
....8I-3
COLLAPSIBLE SPACER - INSTALLATION
....3-70
COLLAPSIBLE SPACER - REMOVAL
.......3-70
COLUMN - DESCRIPTION
...............19-5
COLUMN - INSTALLATION
...............19-7
COLUMN - REMOVAL
..................19-5
COLUMN, SPECIAL TOOLS - STEERING
....19-8
COMBINATION FLASHER - DESCRIPTION
. . 8L-19
COMBINATION FLASHER - OPERATION
. . . 8L-19
COMBUSTION PRESSURE LEAKAGE -
DIAGNOSIS AND TESTING, CYLINDER
......9-8
COMMUNICATION - DESCRIPTION
........8E-8
COMMUNICATION - OPERATION
..........8E-8
KJINDEX 5
Description Group-Page Description Group-Page Description Group-Page