Safari Van AWD V6-4.3L VIN W (1996)
EVAP Purge Vaccum Switch: Description and Operation
EVAP Vacuum Switch
The EVAP Purge Vacuum Switch is used by the VCM to monitor EVAP canister purge solenoid operation and purge system integrity. The EVAP Purge
Vacuum Switch should be closed to ground with no vacuum present (0% EVAP Purge PWM). With EVAP Purge PWM at 25% or greater, the EVAP
Purge Vacuum Switch should open.
An incorrect EVAP Purge system flow should set a DTC P0441. A continuous purge condition with no purge commanded by the VCM should set a DTC
Pi 441. Refer to Evaporative Emission (EVAP) Control System for a complete description of the EVAP system.
