The Evaporative Emission Control System prevents fuel vapor stored in fuel tank from vaporizing into the atmosphere. When the fuel evaporates in the fuel tank, the vapor passes through vent hoses or tubes to a canister filled with charcoal.

The canister temporarily holds the vapor in the charcoal. The ECM will control the system in order to draw the gathered vapor into the combustion chambers during certain operating conditions. Engine manifold vacuum is used to draw the vapor into intake manifold.

Evaporative Emission Control System

...

Schematic Diagrams

Schematic Diagram Canister The Canister is filled with charcoal and absorbs evaporated fuel vapor from the fuel tank. The gathered fuel vapor in canister is drawn into the intake man ...

See also:

Engine Coolant Temperature Sensor (ECTS). Repair procedures
Inspection 1. Turn the ignition switch OFF. 2. Remove the ECTS (Refer to "Removal"). 3. After immers ...

Knock Sensor (KS). Description and Operation
Description Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock Sensor (KS) is installed on the cylinder block and senses engine knoc ...

Body Control Module (BCM). Schematic Diagrams
BCM Connector Terminals BCM Input Signal SPEC No Input signal name Logic state ON/OFF voltage recognition level (V) Remarks ...