Vacuum Switch: Specifications

EVAP/EGR Thermo Valve
Below 63°C (145°F) Open (Purge/EGR Disabled)
Above 65°C (149°F) Closed (Purge/EGR Enabled)

HAI Thermo Valve
Below 30°C (86°F) Intake Air Heated
Above 45°C (113°F) Intake Air Cooled

Engine Vacuum At Idle 20 in.Hg (69 kPa)

Vacuum Switch
Above 21.6 in.Hg NO continuity
Below 17.8 in.Hg Continuity