toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Diagram Information and Instructions|Page 3385 > < Diagram Information and Instructions|Page 3383
Page 1
background image

EGR Control Solenoid: Description and Operation

PURPOSE

The Vacuum Switching Valve for Exhaust Gas Recirculation (VSV for EGR) controls the regulated vacuum applied to the EGR valve. The 
Engine Control Module (ECM) uses the VSV to prevent EGR operation when the engine is cold to improve driveability.

OPERATION

The VSV receives voltage whenever the ignition switch is turned on. When EGR is required, the ECM grounds the remaining terminal which
opens the VSV vacuum passage allowing vacuum to the EGR Valve.

Diagram Information and Instructions|Page 3385 > < Diagram Information and Instructions|Page 3383