Chrysler 1997 Stratus Convertible RHD Service Manual page 890

ELECTRICAL CONNECTION EGR VALVE ELECTRICAL CONNECTION
DUTY CYCLE PURGE
SOLENOID
14 - 36 FUEL SYSTEM
DESCRIPTION AND OPERATION (Continued)
Fig. 21 Duty Cycle EVAP Purge Solenoid
ELECTRIC EGR TRANSDUCER—PCM OUTPUT—
2.4/2.5L ENGINES
The Electric EGR Transducer contains an electri-
cally operated solenoid and a back-pressure con-
trolled vacuum transducer (Fig. 22). The PCM
operates the solenoid based on inputs from the multi-
port fuel injection system. The solenoid/transducer
and EGR valve are serviced as an assembly.
Fig. 22 Electronic EGR Transducer
When the PCM energizes the solenoid, vacuum
does not reach the transducer. Vacuum flows to the
transducer when the PCM de-energizes the solenoid.
When exhaust system back-pressure becomes high
enough, it fully closes a bleed valve in the vacuum
transducer. When the PCM de-energizes the solenoid
and back-pressure closes the transducer bleed valve,
vacuum flows through the transducer to operate the
EGR valve.
DRIVER'S MASTER CYLINDER SIDE TOWER STRUT EXHAUST VACUUM SUPPLY PRESSURE BACK VACUUM INLET
De-energizing the solenoid, but not fully closing the
transducer bleed hole (because of low back-pressure),
varies the strength of the vacuum signal applied to
the EGR valve. Varying the strength of the vacuum
signal changes the amount of EGR supplied to the
engine. This provides the correct amount of exhaust
gas recirculation for different operating conditions.
The solenoid/transducer and EGR valve mount to
the rear of the cylinder head (Fig. 23) or (Fig. 24).
Fig. 23 Electric EGR Transducer—2.4L Engine
Fig. 24 EGR Control Valve—2.5L Engine
GENERATOR FIELD—PCM OUTPUT
The PCM regulates the charging system voltage
within a range of 12.9 to 15.0 volts. Refer to Group
8A for Battery system information and 8C for charg-
ing system information.
EGR SOLENOID PRESSURE EGR TRANSDUCER BACK BACK VACUUM TO EGR VALVE PRESSURE OUTLET HOSE
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