Leak Detection Pump; Crankcase Ventilation System Testing/Cleaning; Evap Canister Removal And Installation; Duty Cycle Evap Canister Purge Solenoid Removal And Installation - Jeep 200 Cherokee Service Manual

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DIAGNOSIS AND TESTING (Continued)
LEAK DETECTION PUMP (LDP)
Refer to the appropriate Powertrain Diagnostic
Procedures service manual for LDP testing proce-
dures.
CRANKCASE VENTILATION SYSTEM
TESTING/CLEANING
The Crankcase Ventilation (CCV) system performs
the same function as a conventional PCV system, but
does not use a vacuum controlled valve. A vacuum
fitting containing a fixed orifice of a calibrated size is
used. It meters the amount of crankcase vapors
drawn out of the engine.
(1) Check each CCV system tube (line) for leaks,
cracks, kinks or bends. Replace as necessary
(2) Disconnect each CCV tube..
(3) Blow compressed air through each tube and
check for blockage or restrictions. If cleaning is nec-
essary, spray a soapy-type all-purpose cleaner into
each component and blow out. After restriction is
cleared, rinse out component with clear water. Blow
water from component and install to vehicle. To pre-
vent damage to plastic components, never
spray carburetor-type cleaner into any of the
plastic tubes or the fixed orifice fitting. Never
attempt to clean the fixed orifice fitting with a
metal object as calibration could be affected. If
fixed fitting cannot be cleared, replace it.
REMOVAL AND INSTALLATION
EVAP CANISTER
The EVAP canister is located under left side of
vehicle near front of rear axle (Fig. 7).
REMOVAL
(1) Disconnect vacuum hoses/lines at EVAP canis-
ter. Note location of lines before removal.
(2) Remove EVAP canister and mounting bracket
assembly from body (3 nuts).
(3) Remove canister from mounting bracket (2
nuts).
INSTALLATION
(1) Position canister
bracket. Align 2 canister dowel pins into rubber
bushings.
(2) Install 2 canister nuts and tighten to 5 N·m (45
in. lbs.) torque.
(3) Position canister and bracket assembly to body.
(4) Install 3 nuts and tighten to 43 N·m (32 ft.
lbs.) torque.
(5) Connect vacuum hoses/lines at EVAP canister.
into canister mounting
EMISSION CONTROL SYSTEMS
Fig. 7 EVAP Canister Location
1 – CANISTER MOUNTING BRACKET
2 – BRACKET NUTS (3)
3 – EVAP CANISTER
4 – CANISTER MOUNTING NUTS (2)
5 – L. R. SHOCK ABSORBER
6 – EVAP LINES/HOSES
7 – DOWEL PINS AND BUSHINGS (2)
DUTY CYCLE EVAP CANISTER PURGE
SOLENOID
REMOVAL
The solenoid attaches to a bracket located in right-
rear side of engine compartment (Fig. 8) or (Fig. 9).
The top of the solenoid has the word UP or TOP on
it. The solenoid will not operate properly unless it is
installed correctly.
(1) Disconnect electrical wiring connector at sole-
noid.
(2) Disconnect vacuum harness at solenoid.
(3) Remove solenoid and its support bracket.
INSTALLATION
(1) Install EVAP canister purge solenoid and its
mounting bracket to cowl panel.
(2) Tighten bolt to 5 N·m (45 in. lbs.) torque.
(3) Connect vacuum harness and wiring connector.
ROLLOVER VALVE(S)
The rollover valves(s) are/is molded into the fuel
tank and are not serviced separately. If replacement
is necessary, the fuel tank must be replaced. Refer to
Fuel Tank Removal/Installation.
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