Exhaust Gas Recirculation & Canister Purge Control

EGR And Canister Control System:

CIRCUIT OPERATION

The EGR and Evaporative Canister control system is used to allow precise control of the EGR and Canister valves. The ECM receives signals from the crank angle sensor, air flow meter, engine temperature sensor and the ignition switch to determine if operation is warranted. The ECM supplies the ground circuit for the solenoid.

Vacuum Control Solenoid:

EGR/CANISTER CONTROL SOLENOID

When the ECM senses the predetermined conditions suitable for operation, it de-energizes the solenoid, redirecting vacuum from the source port and vent port to the source port and valve port allowing EGR and Canister operation.
Refer to EMISSION CONTROLS for further description of the EGR system.

EGR And Canister Solenoid Operation:

Refer to the chart for solenoid operating conditions.