Abstract: A Leak Detection Module may include a housing, wherein the housing is positioned between a charcoal cannister and atmosphere and the housing includes a first port fluidly communicating the housing to the cannister and a second port fluidly communicating the housing to the atmosphere. A Leak Detection Module may include a canister valve solenoid (CVS) arranged within the housing and in fluid communication along a first fluid passageway between the first and second ports, the CVS movable between open and closed positions. A Leak Detection Module may include a pump arranged within the housing and in fluid communication along a second fluid passageway between the first and second ports, wherein the first and second fluid passageways are parallel to each other.

Abstract: A leak detection module (LDM) includes a three-position proportional solenoid valve having a charcoal canister port fluidly connected to a charcoal canister connection, a pump port fluidly connected to a first port of a pump, and an atmospheric port fluidly connected to a second port of a pump. The atmospheric port is fluidly connected to atmosphere. A longitudinally movable rod has a seal with first, second and third positions. The seal obstructs the pump port and fluidly connects the charcoal canister port and the atmospheric port in the first position, obstructs the atmospheric portion and fluidly connects the charcoal canister port and the pump port in the second position, and obstructs the charcoal canister port in the third position which fluidly blocks the pump port from the atmospheric port and fluidly separates the first and second ports with the seal.

Abstract: A leak detection module (LDM) includes a housing including first and second valve cavities respectively having first and second walls respectively extending to first and second openings. The first and second walls respectively include first and second holes. The housing has an atmospheric port, a charcoal canister port, and an electrical connector. First and second solenoid valves are arranged within the housing and are respectively received in the first and second cavities and extend out of the first and second openings. A pump is arranged within the housing and includes first and second pump ports respectively coupled to the first and second holes. An electrical connector assembly is arranged within the housing and is coupled to the electrical connector. The electrical connector assembly is electrically connected to the first and second solenoid valves, and the pump.