2003 JEEP GRAND CHEROKEE engine pressure

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (M)Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was recorded
(depending if required by CARB and/or EPA). MIL is displayed as an engine icon on instrument panel.
(G)

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (M)Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was recorded
(depending if required by CARB and/or EPA). MIL is displayed as an engine icon on instrument panel.
(G)

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual tive system and seal the evaporative system so the
leak detection test can be run.
The primary components within the assembly are:
A three port solenoid that activates both of the func-
tions listed a

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual 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

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual ²a PCV valve mounted to the oil filler housing
(Fig. 3). The PCV valve is sealed to the oil filler
housing with an o-ring.
²the air cleaner housing
²two interconnected breathers threaded into the
r

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual CCV HOSE
DIAGNOSIS AND TESTING - CCV SYSTEM -
4.0L
Before attempting diagnosis, be sure locations of
fixed orifice fitting and air inlet fitting (Fig. 8) have
not been inadvertently exchanged. The fix

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual INSTALLATION - FIXED ORIFICE FITTING
When installing fixed orifice fitting, be sure loca-
tions of fixed orifice fitting and air inlet fitting (Fig.
9) have not been inadvertently exchanged. The fixed

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual OPERATION
The main purpose of the LDP is to pressurize the
fuel system for leak checking. It closes the EVAP sys-
tem vent to atmospheric pressure so the system can
be pressurized for leak testing. Th