Town & Country LWB FWD V6-3.3L VIN G Flex Fuel (1999)
DIAPHRAGM UPWARD MOVEMENT
When the PCM energizes the LDP solenoid, the solenoid blocks the atmospheric port leading through the EVAP air filter and at the same time opens the
engine vacuum port to the pump cavity above the diaphragm. The diaphragm moves upward when vacuum above the diaphragm exceeds spring force.
This upward movement closes the vent valve. It also causes low pressure below the diaphragm, unseating the inlet check valve and allowing air in from
the EVAP air filter. When the diaphragm completes its upward movement, the LDP reed switch turns from closed to open.
