2001 DODGE TOWN AND COUNTRY Service Manual

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DODGE TOWN AND COUNTRY 2001  Service Manual 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 t

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DODGE TOWN AND COUNTRY 2001  Service Manual the O2S must be tested to ensure that it is heating
the sensor properly.
The O2S circuit is monitored for a drop in voltage.
The sensor output is used to test the heater by iso-
lating the effect of t

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DODGE TOWN AND COUNTRY 2001  Service Manual LEAK DETECTION PUMP MONITOR
The leak detection assembly incorporates two pri-
mary functions: it must detect a leak in the evapora-
tive system and seal the evaporative system so the
leak detection te

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DODGE TOWN AND COUNTRY 2001  Service Manual speed above the maximum threshold (2000 rpm), the
PCM will not store a DTC.
There are several operating conditions for which
the PCM monitors and sets DTCs. Refer to Moni-
tored Systems, Components,

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DODGE TOWN AND COUNTRY 2001  Service Manual EVAPORATIVE EMISSIONS
TABLE OF CONTENTS
page page
EVAPORATIVE EMISSIONS
OPERATION.............................10
EVAP/PURGE SOLENOID
DESCRIPTION...........................12
OPERATION.................

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DODGE TOWN AND COUNTRY 2001  Service Manual Fig. 1 ORVR System Schematic
1 - FUEL CAP
2 - RECIRCULATION TUBE
3 - LIQUID SEPARATOR
4 - PURGE
5 - W/LDP
6 - BREATHER ELEMENT
7 - W/O LDP8 - CANISTER
9 - ROLLOVER VALVE
10 - FUEL TANK
11 - CHECK VALV

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DODGE TOWN AND COUNTRY 2001  Service Manual EVAP/PURGE SOLENOID
DESCRIPTION
All vehicles use a proportional purge solenoid. The
solenoid regulates the rate of vapor flow from the
EVAP canister to the throttle body. The PCM oper-
ates the soleno

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DODGE TOWN AND COUNTRY 2001  Service Manual LEAK DETECTION PUMP
DESCRIPTION
The leak detection pump is a device used to detect
a leak in the evaporative system.
The primary components within the leak detection
pump assembly are: a three-port le