DMTL Pump

Courtesy of JAGUAR CARS, INC.

The DMTL pump is connected to the atmospheric vent of the charcoal canister and incorporates an electric air pump, a positive temperature coefficient (PTC) heating element, a normally open change-over valve and a reference orifice. The DMTL pump is only operated when the ignition is off and is controlled by the engine control module (ECM). The engine control module (ECM) also monitors the electric air pump operation and the change-over valve for faults.